tdepim/kdgantt/KDGanttViewSubwidgets.cpp

/* -*- Mode: C++ -*-
   $Id$
   KDGantt - a multi-platform charting engine
*/

/****************************************************************************
 ** Copyright (C)  2002-2004 Klarälvdalens Datakonsult AB.  All rights reserved.
 **
 ** This file is part of the KDGantt library.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** Licensees holding valid commercial KDGantt licenses may use this file in
 ** accordance with the KDGantt Commercial License Agreement provided with
 ** the Software.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.klaralvdalens-datakonsult.se/Public/products/ for
 **   information about KDGantt Commercial License Agreements.
 **
 ** Contact info@klaralvdalens-datakonsult.se if any conditions of this
 ** licensing are not clear to you.
 **
 ** As a special exception, permission is given to link this program
 ** with any edition of TQt, and distribute the resulting executable,
 ** without including the source code for TQt in the source distribution.
 **
 **********************************************************************/


#include "KDGanttViewSubwidgets.h"
#include "KDGanttViewEventItem.h"
#include "KDGanttViewSummaryItem.h"
#include "KDGanttViewTaskItem.h"
#ifndef KDGANTT_MASTER_CVS
#include "KDGanttViewSubwidgets.moc"
#endif

#include <tqlabel.h>
#include <tqheader.h>
#include <tqpainter.h>
#include <tqrect.h>
#include <tqtooltip.h>
#include <tqapplication.h>
#include <tqdrawutil.h>
#include <tqpalette.h>
#include <tqdragobject.h>
#include <tqptrlist.h>
#include <tqpen.h>

#include <kglobal.h>
#include <klocale.h>
#include <kcalendarsystem.h>
#include <kdebug.h>

KDTimeTableWidget:: KDTimeTableWidget( TQWidget* parent,KDGanttView* myGantt)
    : TQCanvas (TQT_TQOBJECT(parent))
{
    myGanttView = myGantt;
    taskLinksVisible = true;
    flag_blockUpdating = false;
    int_blockUpdating = 0;
    gridPen.setStyle(Qt::DotLine);
    gridPen.setColor(TQColor(100,100,100));
    maximumComputedGridHeight = 0;
    denseLineCount = 0;
    denseLineBrush = TQBrush( TQColor ( 240,240,240 ));
    noInfoLineBrush = TQBrush(  TQColor ( 100,100,100 ), TQt::FDiagPattern );
    pendingHeight = 0;
    pendingWidth = 0;
    retune(256);
    resize(1,1);
}

TQPtrList<KDGanttViewTaskLink> KDTimeTableWidget::taskLinks()
{
    return myTaskLinkList;
}

void KDTimeTableWidget::clearTaskLinks()
{
    // cannot use clear() here, as tasklinks will remove themselves from my list when deleted!
    TQPtrListIterator<KDGanttViewTaskLink> it(myTaskLinkList);
    while (it.current()) {
        delete it.current();
    }

}

void KDTimeTableWidget::resetWidth( int wid )
{
    if ( wid == width() ) {
        if (pendingHeight)
            pendingWidth = wid;
        else
            pendingWidth = 0;
        return;
    }
    if ( ! pendingHeight )
        pendingHeight = height();
    pendingWidth = wid;
    updateMyContent();
}

void KDTimeTableWidget::checkHeight( int hei )
{
    if( hei < height() )
        return;
    if ( pendingHeight < hei+100)
        pendingHeight = hei+100;
    if ( !  pendingWidth )
        pendingWidth = width();
    maximumComputedGridHeight = 0; //force recomputing all
    updateMyContent();
}


void KDTimeTableWidget::setNoInformationBrush( const TQBrush& brush )
{
    noInfoLineBrush = brush;
    updateMyContent();
}
TQBrush KDTimeTableWidget::noInformationBrush() const
{
    return noInfoLineBrush;
}

void KDTimeTableWidget::removeItemFromTasklinks( KDGanttViewItem* item)
{
    TQPtrListIterator<KDGanttViewTaskLink> it((myTaskLinkList));
    for ( ; it.current(); ++it ) {
        it.current()->removeItemFromList( item );
    }
}

void KDTimeTableWidget::expandItem( TQListViewItem * item)
{
    item->invalidateHeight () ;
    //tqApp->processEvents();
    updateMyContent();
}
void KDTimeTableWidget::collapseItem( TQListViewItem * item)
{
    item->invalidateHeight () ;
    //tqApp->processEvents();
    updateMyContent();
}

void KDTimeTableWidget::highlightItem( TQListViewItem * item )
{
    static bool itemwashighlighted;
    static KDGanttViewItem* highlightedItem = 0;
    if (highlightedItem)
        highlightedItem->setHighlight(itemwashighlighted);
    highlightedItem = ( KDGanttViewItem*)item;
    itemwashighlighted = highlightedItem->highlight();
    highlightedItem->setHighlight(true);
    item->invalidateHeight () ;
    myGanttView->myListView->contentsY();
    updateMyContent();
}
int  KDTimeTableWidget::computeHeight()
{
    // compute height of ListView
    // show only items shown in ListView
    int hei = 0;
    KDGanttViewItem* temp;
    temp = myGanttView->firstChild();
    while (temp) {
        hei += temp->computeHeight();
        temp = temp->nextSibling();
    }
    // set hei  to 1 to avoid canavs to be a null pixmap
    if (hei == 0) {
        hei = 1;
    }
    //tqDebug("COMPUTED HEI %d ", hei);
    emit heightComputed( hei );
    return hei;
}
void KDTimeTableWidget::computeVerticalGrid()
{
    // recompute the vertical grid
    // compute the vertical grid
    // if we have too much lines, hide them
    //tqDebug("computeVerticalGrid() ");
    int cw =  myGanttView->myTimeHeader->myGridMinorWidth;
    int i = 0;
    int h ;
    if (pendingHeight > height() )
        h = pendingHeight;
    else
        h = height();
    int wid;
    if ( pendingWidth )
        wid = pendingWidth;
    else
        wid = width();
    KDCanvasLine* templine;
    KDCanvasRectangle* temprect;
    TQColor colcol;
    TQPen colPen;
    bool colorIterator = true;


    if (myGanttView->showMinorTicks()){//minor
        colPen.setWidth(cw);
        TQPtrListIterator<KDCanvasRectangle> itcol(columnColorList);
        TQPtrListIterator<KDCanvasLine> itgrid(verGridList);
        for ( ; itgrid.current(); ++itgrid ) {
            if (i < wid) {
                itgrid.current()->setPoints(i,0,i,h);
                itgrid.current()->show();

                if (myGanttView->myTimeHeader->getColumnColor(colcol,i,i+cw))
                    {

                        colPen.setColor(colcol);
                        if (colorIterator)
                            colorIterator = itcol.current();
                        if (colorIterator)
                            {/*
                               itcol.current()->setPen(colPen);
                               itcol.current()->setPoints(i+(cw/2),0,i+(cw/2),h);
                             */

                                itcol.current()->setPen( TQPen(TQPen::NoPen) );
                                itcol.current()->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                                itcol.current()->setSize(cw ,h );
                                itcol.current()->move( i, 0 );
                                itcol.current()->show();
                                ++itcol;
                            } else {

                                /*
                                  templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
                                  templine->setPen(colPen);
                                  templine->setPoints(i+(cw/2),0,i+(cw/2),h);
                                */
                                temprect = new KDCanvasRectangle(this,0,Type_is_KDGanttGridItem);
                                temprect->setPen( TQPen(TQPen::NoPen) );
                                temprect->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                                temprect->setSize(cw ,h );
                                temprect->move( i, 0 );
                                temprect->setZ(-20);
                                temprect->show();
                                columnColorList.append(temprect);
                            }
                    }
                i += cw;
            } else {
                itgrid.current()->hide();
            }
        }
        // create additional Lines for vertical grid
        for ( ;i < wid;i += cw) {
            templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
            templine->setPen(gridPen);
            templine->setPoints(i,0,i,h);
            templine->setZ(0);
            templine->show();
            verGridList.append(templine);
            if (myGanttView->myTimeHeader->getColumnColor(colcol,i,i+cw))
                {
                    colPen.setColor(colcol);
                    if (colorIterator)
                        colorIterator = itcol.current();
                    if (colorIterator)
                        {/*
                           itcol.current()->setPen(colPen);
                           itcol.current()->setPoints(i+(cw/2),0,i+(cw/2),h);
                         */
                            itcol.current()->setPen( TQPen(TQPen::NoPen) );
                            itcol.current()->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                            itcol.current()->setSize(cw ,h );
                            itcol.current()->move( i, 0 );
                            itcol.current()->show();
                            ++itcol;
                        } else {
                            temprect = new KDCanvasRectangle(this,0,Type_is_KDGanttGridItem);
                            temprect->setPen( TQPen(TQPen::NoPen) );
                            temprect->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                            temprect->setSize(cw ,h );
                            temprect->move( i, 0 );
                            temprect->setZ(-20);
                            temprect->show();
                            columnColorList.append(temprect);
                            /*
                              templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
                              templine->setPen(colPen);
                              templine->setPoints(i+(cw/2),0,i+(cw/2),h);
                              templine->setZ(-20);
                              templine->show();
                              columnColorList.append(templine);
                            */
                        }
                }
        }
        if (colorIterator)
            for ( ; itcol.current(); ++itcol )
                itcol.current()->hide();
    } else {//major
        if (myGanttView->showMajorTicks()) {
            TQValueList<int>::iterator intIt = myGanttView->myTimeHeader->majorTicks.begin();
            TQValueList<int>::iterator intItEnd = myGanttView->myTimeHeader->majorTicks.end();
            TQPtrListIterator<KDCanvasRectangle> itcol(columnColorList);
            TQPtrListIterator<KDCanvasLine> itgrid(verGridList);
            int left = 0;
            for ( ; itgrid.current(); ++itgrid ) {
                if (intIt != intItEnd) {
                    left = (*intIt);
                    ++intIt;
                    itgrid.current()->setPoints(left,0,left,h);
                    itgrid.current()->show();
                    //int right = (*intIt);
                    if ((*intIt))
                        if (myGanttView->myTimeHeader->getColumnColor(colcol,left,(*intIt) ))
                            {
                                int mid = (-left+(*intIt));
                                colPen.setColor(colcol);
                                colPen.setWidth((*intIt)-left);
                                if (colorIterator)
                                    colorIterator = itcol.current();
                                if (colorIterator)
                                    {/*
                                       itcol.current()->setPen(colPen);
                                       itcol.current()->setPoints(i+mid,0,mid,h);
                                     */
                                        itcol.current()->setPen( TQPen(TQPen::NoPen) );
                                        itcol.current()->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                                        itcol.current()->setSize(mid ,h );
                                        itcol.current()->move( left, 0 );
                                        itcol.current()->show();
                                        ++itcol;
                                    } else {
                                        temprect = new KDCanvasRectangle(this,0,Type_is_KDGanttGridItem);
                                        temprect->setPen( TQPen(TQPen::NoPen) );
                                        temprect->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                                        temprect->setSize(mid,h );
                                        temprect->move( left, 0 );
                                        temprect->setZ(-20);
                                        temprect->show();
                                        columnColorList.append(temprect);
                                        /*
                                          templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
                                          templine->setPen(colPen);
                                          templine->setPoints(mid,0,i+mid,h);
                                          templine->setZ(-20);
                                          templine->show();
                                          columnColorList.append(templine);
                                        */

                                    }
                            }

                } else {
                    itgrid.current()->hide();
                }
            }
            KDCanvasLine* templine;
            // create additional Lines for vertical grid
            for ( ;intIt != intItEnd  ;++intIt) {

                templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
                templine->setPen(gridPen);
                templine->setPoints((*intIt),0,(*intIt),h);
                templine->setZ(0);
                templine->show();
                verGridList.append(templine);
                if ((*intIt))
                    if (myGanttView->myTimeHeader->getColumnColor(colcol,left,(*intIt)))
                        {
                            int mid = (-left+(*intIt));
                            colPen.setColor(colcol);
                            colPen.setWidth((*intIt)-left);
                            if (colorIterator)
                                colorIterator = itcol.current();
                            if (colorIterator)
                                {/*
                                   itcol.current()->setPen(colPen);
                                   itcol.current()->setPoints(i+mid,0,mid,h);
                                 */
                                    itcol.current()->setPen( TQPen(TQPen::NoPen) );
                                    itcol.current()->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                                    itcol.current()->setSize(mid ,h );
                                    itcol.current()->move( left, 0 );
                                    itcol.current()->show();
                                    ++itcol;
                                } else {
                                    temprect = new KDCanvasRectangle(this,0,Type_is_KDGanttGridItem);
                                    temprect->setPen( TQPen(TQPen::NoPen) );
                                    temprect->setBrush( TQBrush( colcol, Qt::SolidPattern) );
                                    temprect->setSize(mid ,h );
                                    temprect->move( left, 0 );
                                    temprect->setZ(-20);
                                    temprect->show();
                                    columnColorList.append(temprect);
                                    /*
                                      templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
                                      templine->setPen(colPen);
                                      templine->setPoints(mid,0,i+mid,h);
                                      templine->setZ(-20);
                                      templine->show();
                                      columnColorList.append(templine);
                                    */
                                }
                        }
                left = (*intIt);
            }
            if (colorIterator)
                for ( ; itcol.current(); ++itcol ) {
                    itcol.current()->hide();
                }

        }
        else {
            //hideall
            TQPtrListIterator<KDCanvasLine> itgrid(verGridList);
            for ( ; itgrid.current(); ++itgrid ) {
                itgrid.current()->hide();
            }
            TQPtrListIterator<KDCanvasRectangle> itcol(columnColorList);
            for ( ; itcol.current(); ++itcol ) {
                itcol.current()->hide();
            }
        }
    }
}
void KDTimeTableWidget::computeHorizontalGrid()
{
    // compute  horizontal grid
    //tqDebug("computeHorizontalGrid() ");
    KDGanttViewItem* temp = myGanttView->firstChild();
    int wid;
    if ( pendingWidth )
        wid = pendingWidth;
    else
        wid = width();
    KDCanvasLine* templine;
    TQPtrListIterator<KDCanvasLine> ithor(horGridList);
    if ( ithor.current() ) {
        templine = ithor.current();
        ++ithor;
    } else {
        templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
        templine->setPen(gridPen);
        templine->setZ(0);
        horGridList.append(templine);
    }
    templine->setPoints(0,0,wid,0);
    templine->show();
    int posY;
    while ( temp ) {
        posY = temp->itemPos() + temp->height();
        if ( ithor.current() ) {
            templine = ithor.current();
            ++ithor;
        } else {
            //new vertical grid line
            templine = new KDCanvasLine(this,0,Type_is_KDGanttGridItem);
            templine->setPen(gridPen);
            templine->setZ(0);
            horGridList.append(templine);
        }
        if ( templine->endPoint() != TQPoint(wid,posY ))
            templine->setPoints(0,posY,wid,posY );
        if ( !templine->isVisible() )
            templine->show();
        //TQString ts = "asGroup";
        //if (!temp->displaySubitemsAsGroup() )
        //	ts = " NOT asGroup";
        //tqDebug("temp name %s %s", temp->listViewText(0).latin1(), ts.latin1());

        temp = temp->itemBelow ();
    }
    while ( ithor.current() ) {
        if ( ithor.current()->isVisible() )
            ithor.current()->hide();
        ++ithor;
    }
}

void KDTimeTableWidget::computeDenseLines()
{
    KDGanttViewItem* temp = myGanttView->firstChild();
    int wid;
    if ( pendingWidth )
        wid = pendingWidth;
    else
        wid = width();
    TQPtrListIterator<KDCanvasRectangle> ithordense(horDenseList);
    KDCanvasRectangle* denseLine;
    int tempDenseLineCount = 0;
    while ( temp ) {
        if ( temp->isVisible() ) {
            ++tempDenseLineCount;
            if ( tempDenseLineCount == denseLineCount ) {
                tempDenseLineCount = 0;
                if ( ithordense.current() ) {
                    denseLine = ithordense.current();
                    ++ithordense;
                } else {
                    denseLine =new KDCanvasRectangle(this,0,Type_is_KDGanttGridItem);
                    denseLine->setZ(-2);
                    horDenseList.append( denseLine );
                }
                if ( denseLine->rect() != TQRect(0, temp->itemPos(),wid, temp->height()) ) {
                    denseLine->move( 0, temp->itemPos() );
                    denseLine->setSize( wid, temp->height());
                }
                if (denseLine->brush() != denseLineBrush ) {
                    denseLine->setPen( TQPen(  TQt::NoPen ) );
                    denseLine->setBrush( denseLineBrush);
                }
                if (!denseLine->isVisible() )
                    denseLine->show();

            } else {
                ;
            }
        }
        temp = temp->itemBelow ();
    }
    while ( ithordense.current() ) {
        if ( ithordense.current()->isVisible() ) {
            ithordense.current()->hide();
        }
        ++ithordense;
    }
}
void KDTimeTableWidget::computeShowNoInformation()
{
    KDGanttViewItem* temp = myGanttView->firstChild();
    int wid;
    if ( pendingWidth )
        wid = pendingWidth;
    else
        wid = width();
    TQPtrListIterator<KDCanvasRectangle> itnoinfo(showNoInfoList);
    KDCanvasRectangle* noInfoLine;
    while ( temp ) {
        if ( temp->showNoInformation() ) {
            if ( itnoinfo.current() ) {
                noInfoLine = itnoinfo.current();
                ++itnoinfo;
            } else {
                noInfoLine =new KDCanvasRectangle(this,0,Type_is_KDGanttGridItem);
                showNoInfoList.append( noInfoLine );
                noInfoLine->setZ(-1);
            }
            noInfoLine->move( 0, temp->itemPos() );
            noInfoLine->setSize( wid, temp->height());
            noInfoLine->setPen( TQPen(  TQt::NoPen ) );
            noInfoLine->setBrush( noInfoLineBrush);
            noInfoLine->show();
        }
        temp = temp->itemBelow ();
    }
    while ( itnoinfo.current() ) {
        itnoinfo.current()->hide();
        ++itnoinfo;
    }

}

void KDTimeTableWidget::computeTaskLinks()
{
    //compute and show tasklinks
    TQPtrListIterator<KDGanttViewTaskLink> it((myTaskLinkList));
    for ( ; it.current(); ++it ) {
        if (it.current()->isVisible())
            it.current()->showMe(true);
        else
            it.current()->showMe(false);
    }
}

// updateMyContent() can be blocked by blockUpdating( true ) or inc_blockUpdating()
// updateMyContent() is blocked, if the GanttView is hidden after startup

void KDTimeTableWidget::updateMyContent()
{
    if ( flag_blockUpdating || int_blockUpdating ) {
        // tqDebug("KDTimeTableWidget::updateMyContent() blocked! ");
        return;
    }
    //tqDebug("KDTimeTableWidget::updateMyContent() ********************************* ");
    /*
    // debug output
    KDGanttViewItem* temp =  myGanttView->firstChild();
    while (temp != 0) {
    temp->printinfo("  " );
    temp = temp->nextSibling();
    }
    */
    int hei = computeHeight();
    minimumHeight = hei;
    int viewport_hei = myGanttView->myCanvasView->viewport()->height();
    if ( viewport_hei > hei )
        hei = viewport_hei + 100;
    if ( myGanttView->myTimeHeader->registerStartTime() )
        return; // try again via timeheader computeTicks();
    if ( myGanttView->myTimeHeader->registerEndTime() )
        return; // try again via timeheader computeTicks();
    if ( hei > height() ) {
        if ( !  pendingWidth )
            pendingWidth = width();
        if ( pendingHeight < hei )
            pendingHeight = hei;
    }
    if (pendingHeight > hei )
        hei =  pendingHeight;
    if (hei > maximumComputedGridHeight)
        {
            maximumComputedGridHeight = hei;
            // compute the background interval lines
            myGanttView->myTimeHeader->computeIntervals( hei );
            //compute VerticalGrid and column color
            computeVerticalGrid();
        }
    computeTaskLinks();
    computeHorizontalGrid();
    computeDenseLines();
    computeShowNoInformation();
    //setAllChanged();
    update();
    if (pendingWidth && pendingHeight ) {
        resize( pendingWidth, pendingHeight );
        pendingWidth = 0;
        pendingHeight = 0;
        emit heightComputed( 0 );

    }
    pendingWidth = 0;
    pendingHeight = 0;
    //tqDebug("KDTimeTableWidget::updateMyContent() -------------------------");
}
// used for blocking recursive methods
// e.g. KDGanttViewItem::setHighlight() and  displaySubitemsAsGroup() == true

void KDTimeTableWidget::inc_blockUpdating( )
{
    ++ int_blockUpdating;
}
// used for blocking recursive methods
void KDTimeTableWidget::dec_blockUpdating( )
{
    -- int_blockUpdating;
}
// if false(i.e. unblock), sets int_blockUpdating to 0
void KDTimeTableWidget::setBlockUpdating( bool block )
{
    if ( !block )
        int_blockUpdating = 0;
    flag_blockUpdating = block;
}
bool KDTimeTableWidget::blockUpdating()
{
    return flag_blockUpdating;
}

void KDTimeTableWidget::setShowTaskLinks( bool show )
{
    taskLinksVisible = show;
    updateMyContent();
}
bool KDTimeTableWidget::showTaskLinks()
{
    return taskLinksVisible;
}
void KDTimeTableWidget::setHorBackgroundLines( int count,  TQBrush brush )
{
    denseLineBrush = brush;
    denseLineCount = 0;
    if ( count > 1 )
        denseLineCount = count;
}


int KDTimeTableWidget::horBackgroundLines(  TQBrush& brush )
{
    brush =  denseLineBrush;
    return denseLineCount;
}

int KDTimeTableWidget::getCoordX( TQDateTime dt ) {
    return myGanttView->myTimeHeader->getCoordX(dt);
}

/* ***************************************************************
   KDTimeHeaderWidget:: KDTimeHeaderWidget
   ***************************************************************** */
KDTimeHeaderWidget:: KDTimeHeaderWidget( TQWidget* parent,KDGanttView* gant )
    : TQWidget (parent)
{
    myToolTip = new KDTimeHeaderToolTip(this,this);
    mySizeHint = 0;
    myGanttView = gant;
    flagDoNotRecomputeAfterChange = true;
    TQDateTime start = (TQDateTime::currentDateTime ()).addSecs(-3600);
    setHorizonStart(start);
    setHorizonEnd( start.addSecs(3600*2));
    flagStartTimeSet = false;
    flagEndTimeSet = false;
    myCenterDateTime = TQDateTime::currentDateTime ();
    setScale(KDGanttView::Auto);
    //setScale(KDGanttView::Hour);
    myMaxScale = KDGanttView::Month;
    myMinScale = KDGanttView::Minute;
    myAutoScaleMinorTickcount = 100;
    setMajorScaleCount( 1 );
    setMinorScaleCount( 1);
    setMinimumColumnWidth( 5 );
    setYearFormat(KDGanttView::FourDigit );
    setHourFormat( KDGanttView::Hour_12 );
    myZoomFactor = 1.0;
    setWeekendBackgroundColor(TQColor(220,220,220) );
    setWeekendDays( 6, 7 );
    myGridMinorWidth = 0;
    myPopupMenu = new TQPopupMenu(this);
    TQPopupMenu * zoomPopupMenu = new TQPopupMenu(this);
    myPopupMenu->insertItem (i18n("Zoom"),zoomPopupMenu, 1);
    zoomPopupMenu->insertItem( i18n("Zoom to 100%"),this, TQT_SLOT(setSettings(int)),0 ,21,21 );
    zoomPopupMenu->insertItem( i18n("Zoom to Fit"),this, TQT_SLOT(setSettings(int)),0 ,20,20 );
    zoomPopupMenu->insertItem( i18n("Zoom In (x 2)"),this, TQT_SLOT(setSettings(int)),0 ,22,22 );
    zoomPopupMenu->insertItem( i18n("Zoom In (x 6)"),this, TQT_SLOT(setSettings(int)),0 ,24,24 );
    zoomPopupMenu->insertItem( i18n("Zoom In (x 12)"),this, TQT_SLOT(setSettings(int)),0 ,26,26 );
    zoomPopupMenu->insertItem( i18n("Zoom Out (x 1/2)"),this, TQT_SLOT(setSettings(int)),0 ,23,23 );
    zoomPopupMenu->insertItem( i18n("Zoom Out (x 1/6)"),this, TQT_SLOT(setSettings(int)),0 ,25,25 );
    zoomPopupMenu->insertItem( i18n("Zoom Out (x 1/12)"),this, TQT_SLOT(setSettings(int)),0 ,27,27 );
    scalePopupMenu = new TQPopupMenu(this);
    myPopupMenu->insertItem (i18n("Scale"),scalePopupMenu, 2);
    scalePopupMenu->insertItem( i18n("Minute"),this, TQT_SLOT(setSettings(int)),0 ,1,1 );
    scalePopupMenu->insertItem( i18n("Hour"),this, TQT_SLOT(setSettings(int)),0 ,2,2 );
    scalePopupMenu->insertItem( i18n("Day"),this, TQT_SLOT(setSettings(int)),0 ,3,3 );
    scalePopupMenu->insertItem( i18n("Week"),this, TQT_SLOT(setSettings(int)),0 ,4,4 );
    scalePopupMenu->insertItem( i18n("Month"),this, TQT_SLOT(setSettings(int)),0 ,5,5 );
    scalePopupMenu->insertItem( i18n("Auto"),this, TQT_SLOT(setSettings(int)),0 ,6,6 );
    scalePopupMenu->setCheckable ( true );
    timePopupMenu = new TQPopupMenu(this);
    myPopupMenu->insertItem (i18n("Time Format"),timePopupMenu, 3);
    timePopupMenu->insertItem( i18n("24 Hour"),this, TQT_SLOT(setSettings(int)),0 ,40,40 );
    timePopupMenu->insertItem( i18n("12 PM Hour"),this, TQT_SLOT(setSettings(int)),0 ,41,41 );
    timePopupMenu->insertItem( i18n("24:00 Hour"),this, TQT_SLOT(setSettings(int)),0 ,42,42 );
    yearPopupMenu = new TQPopupMenu(this);
    myPopupMenu->insertItem (i18n("Year Format"),yearPopupMenu, 4);
    yearPopupMenu->insertItem( i18n("Four Digit"),this, TQT_SLOT(setSettings(int)),0 ,50,50 );
    yearPopupMenu->insertItem( i18n("Two Digit"),this, TQT_SLOT(setSettings(int)),0 ,51,51 );
    yearPopupMenu->insertItem( i18n("Two Digit Apostrophe"),this, TQT_SLOT(setSettings(int)),0 ,52,52 );
    yearPopupMenu->insertItem( i18n("No Date on Minute/Hour Scale"),this, TQT_SLOT(setSettings(int)),0 ,53,53 );

    gridPopupMenu = new TQPopupMenu(this);
    myPopupMenu->insertItem (i18n("Grid"),gridPopupMenu,5);
    gridPopupMenu->insertItem( i18n("Show Minor Grid"),this, TQT_SLOT(setSettings(int)),0 ,10,10 );
    gridPopupMenu->insertItem( i18n("Show Major Grid"),this, TQT_SLOT(setSettings(int)),0 ,11,11 );
    gridPopupMenu->insertItem( i18n("Show No Grid"),this, TQT_SLOT(setSettings(int)),0 ,12,12 );
    myPopupMenu->insertItem( i18n("Print"),this, TQT_SLOT(setSettings(int)),0 ,30,30 );
    connect(myPopupMenu, TQT_SIGNAL (  aboutToShow () ) , this, TQT_SLOT( preparePopupMenu() )) ;
    flagZoomToFit = false;
    setShowMinorTicks( true );
    myRealEnd =  myHorizonEnd;
    myRealStart = myHorizonStart;
    autoComputeTimeLine = true;
    flagDoNotRecomputeAfterChange = false;
    flagDoNotRepaintAfterChange = false;
    setShowPopupMenu(false,false,false,false,false,false,false);
    for (int j =1;j<8;++j)
        weekdayColor[j] = TQt::white;
    myMinimumWidth = 0;
    mouseDown = false;
    beginMouseDown = 0;
    endMouseDown = 0;
}

KDTimeHeaderWidget::~KDTimeHeaderWidget()
{
    delete myToolTip;
}
void  KDTimeHeaderWidget::preparePopupMenu()
{
    myPopupMenu->setItemVisible ( 1, flagShowZoom  );
    myPopupMenu->setItemVisible ( 2, flagShowScale );
    myPopupMenu->setItemVisible ( 3, flagShowTime );
    myPopupMenu->setItemVisible ( 4, flagShowYear );
    myPopupMenu->setItemVisible ( 5, flagShowGrid);
    myPopupMenu->setItemVisible ( 30, flagShowPrint );
    if (flagZoomToFit)
        myPopupMenu->changeItem( 1, i18n("Zoom (Fit)"));
    else
        myPopupMenu->changeItem( 1, i18n("Zoom (%1)").arg( TQString::number( zoomFactor(), 'f',3) ) );
    int i = 0;
    int id;
    while ( ( id = scalePopupMenu->idAt( i++ )) >= 0 ) {
        scalePopupMenu->setItemChecked ( id, false );
    }
    scalePopupMenu->setItemChecked ( scalePopupMenu->idAt ( (int)( scale()) ), true );
    i = 0;
    while ( ( id = timePopupMenu->idAt( i++ )) >= 0 ) {
        timePopupMenu->setItemChecked ( id, false );
    }
    timePopupMenu->setItemChecked ( timePopupMenu->idAt ( (int)( hourFormat()) ), true );
    i = 0;
    while ( ( id = yearPopupMenu->idAt( i++ )) >= 0 ) {
        yearPopupMenu->setItemChecked ( id, false );
    }
    yearPopupMenu->setItemChecked ( yearPopupMenu->idAt ( (int)( yearFormat()) ), true );
    i = 0;
    while ( ( id = gridPopupMenu->idAt( i++ )) >= 0 ) {
        gridPopupMenu->setItemChecked ( id, false );
    }

    gridPopupMenu->setItemChecked ( gridPopupMenu->idAt ( 0 ), showMinorTicks() );
    gridPopupMenu->setItemChecked ( gridPopupMenu->idAt ( 1 ), showMajorTicks() );
    gridPopupMenu->setItemChecked ( gridPopupMenu->idAt ( 2 ),
                                    !(showMajorTicks() || showMinorTicks()) );


}

TQString  KDTimeHeaderWidget::getToolTipText(TQPoint p)
{
    return TDEGlobal::locale()->formatDateTime(getDateTimeForIndex(p.x()));
}
void KDTimeHeaderWidget::addTickRight( int num )
{
    int secs = ((num*getTickTime())-30);
    setHorizonEnd(getDateTimeForIndex(width()).addSecs(secs));
    //tqApp->processEvents();
}

void KDTimeHeaderWidget::addTickLeft( int num )
{
    int secs = ((num*getTickTime())-30);
    setHorizonStart(getDateTimeForIndex(0).addSecs(-secs));
    //tqApp->processEvents();
}
// the time in secs of one minor grid tick
int KDTimeHeaderWidget::getTickTime()
{
    return getDateTimeForIndex(0).secsTo(getDateTimeForIndex(myGridMinorWidth));
}


void KDTimeHeaderWidget::checkWidth( int wid )
{
    // we have to set the minimum width one pixel higher than the
    // viewport width of the canvas view in  order to
    // avoid that the horiz. scrollbar of the canvasview is hidden
    myMinimumWidth = wid + 1;
    if ( myMinimumWidth  > width() ||
         ( myMinimumWidth > mySizeHint &&
           myMinimumWidth < (width() - myGridMinorWidth  )) )
        computeTicks();

    // Update (horizontal) scrollbar,
    // We probably come from an external resize and then we must
    // calculate on basis of myCanvasView.
    // (NOTE: we have disconnected the auto TQScrollView scrollbar update)
    if (myGanttView && myGanttView->myCanvasView)
        myGanttView->myCanvasView->updateScrollBars();
}

bool KDTimeHeaderWidget::registerStartTime()
{

    TQListViewItemIterator it( myGanttView->myListView );
    if (!flagStartTimeSet) {
        TQDateTime temp , time;
        KDGanttViewItem* item;
        bool setNewTime = false;
        item = (KDGanttViewItem*)myGanttView->myListView->firstChild();
        if ( item ) {
            temp = item->startTime();
            time = temp;
            //  while ( item != 0)
            for ( ; it.current(); ++it ) {
                item = ( KDGanttViewItem* )it.current();
                if (item->isVisibleInGanttView) {
                    if ( !setNewTime )
                        temp = item->startTime();
                    switch( item->type() ) {
                    case KDGanttViewItem::Event:
                        time = ((KDGanttViewEventItem*)item)->leadTime();
                        setNewTime = true;
                        break;
                    case KDGanttViewItem::Summary:
                    case KDGanttViewItem::Task:
                        time = item->startTime();
                        setNewTime = true;
                        break;
                    default:
                        time = temp;
                    }
                    if ( time < temp) {
                        temp = time ;
                    }
                }
            }
            if ( setNewTime )
                if ( myHorizonStart != temp) {
                    myHorizonStart = temp;
                    computeTicks();
                    return true;
                }
        }
    }
    return false;
}


bool KDTimeHeaderWidget::registerEndTime()
{
    if (!flagEndTimeSet) {
        TQDateTime temp , time;
        KDGanttViewItem* item;
        bool setNewTime = false;
        item = (KDGanttViewItem*)myGanttView->myListView->firstChild();
        if ( item ) {
            temp = item->startTime();
            time = temp;
            TQListViewItemIterator it( myGanttView->myListView );
            for ( ; it.current(); ++it ) {
                item = ( KDGanttViewItem* )it.current();
                if (item->isVisibleInGanttView) {
                    if ( !setNewTime )
                        temp = item->startTime();
                    switch( item->type() ) {
                    case KDGanttViewItem::Event:
                        time = ((KDGanttViewEventItem*)item)->startTime();
                        setNewTime = true;
                        break;
                    case KDGanttViewItem::Summary:
                        time = item->endTime();
                        if ( time < ((KDGanttViewSummaryItem*)item)->actualEndTime())
                            time = ((KDGanttViewSummaryItem*)item)->actualEndTime();
                        setNewTime = true;
                        break;
                    case KDGanttViewItem::Task:
                        time = item->endTime();
                        setNewTime = true;
                        break;
                    default:
                        time = temp;
                    }
                    if ( time > temp)
                        temp = time ;
                }
            }

            if ( setNewTime )
                if (myHorizonEnd != temp ) {
                    myHorizonEnd = temp;
                    computeTicks();
                    return true;
                }
        }
    }
    return false;
}


void KDTimeHeaderWidget::setShowPopupMenu( bool show,
                                           bool showZoom,
                                           bool showScale,
                                           bool showTime,
                                           bool showYear,
                                           bool showGrid,
                                           bool showPrint)
{
    flagShowPopupMenu = show;
    flagShowZoom = showZoom;
    flagShowScale  = showScale;
    flagShowTime  = showTime;
    flagShowYear = showYear;
    flagShowGrid  = showGrid;
    flagShowPrint = showPrint;
}


bool KDTimeHeaderWidget::showPopupMenu() const
{
    return flagShowPopupMenu;
}

void KDTimeHeaderWidget::setSettings(int i)
{

    switch (i) {
    case 1:
        setScale(KDGanttView::Minute );
        break;
    case 2:
        setScale(KDGanttView::Hour );
        break;
    case 3:
        setScale(KDGanttView::Day );
        break;
    case 4:
        setScale(KDGanttView::Week );
        break;
    case 5:
        setScale(KDGanttView::Month );
        break;
    case 6:
        setScale(KDGanttView::Auto );
        break;
    case 10:
        setShowMinorTicks( true );
        break;
    case 11:
        setShowMajorTicks( true );{

        }
        break;
    case 12:
        setShowMajorTicks( false );
        setShowMinorTicks( false);
        break;
    case 20:
        zoomToFit();
        break;
    case 21:
        zoom(1.0);
        break;
    case 22:
        zoom(2.0,false);
        break;
    case 23:
        zoom(0.5,false);
        break;
    case 24:
        zoom(6.0,false);
        break;
    case 25:
        zoom(0.16666,false);
        break;
    case 26:
        zoom(12.0,false);
        break;
    case 27:
        zoom(0.08333,false);
        break;
    case 30:
        myGanttView->print();
        break;
    case 40:
    case 41:
    case 42:
        setHourFormat( (KDGanttView::HourFormat) (i - 40) );
        break;
    case 50:
    case 51:
    case 52:
    case 53:
        setYearFormat( (KDGanttView::YearFormat) ( i - 50) );
        break;

    case 60:

        break;

    case 61:

        break;

    case 62:

        break;

    case 63:

        break;

    case 64:

        break;
    }
    // myGanttView->myTimeTable->updateMyContent();
}
void KDTimeHeaderWidget::zoomToFit()
{
    flagZoomToFit = true;
    computeTicks();
    // Since we have disconnected autoupdate of scrollbars, we must do it ourselves
    if (myGanttView && myGanttView->myCanvasView)
        myGanttView->myCanvasView->updateScrollBars();
}
double KDTimeHeaderWidget::zoomFactor()
{
    return myZoomFactor;
}
double KDTimeHeaderWidget::secsFromTo( TQDateTime begin, TQDateTime end )
{
    TQDateTime temp;
    double secs, days;
    days = begin.daysTo(end);
    temp = begin.addDays((int) days);
    secs = temp.secsTo(end);
    secs += days * 86400.0;
    return secs;
}


void KDTimeHeaderWidget::zoomToSelection( TQDateTime start, TQDateTime end)
{
    if (start < myHorizonStart) {
        myHorizonStart = start;
        flagStartTimeSet = true;
        //tqDebug("myHorizonStart reset");
    }
    if (end > myHorizonEnd) {
        myHorizonEnd = end;
        flagEndTimeSet = true;
        //tqDebug("myHorizonEnd reset ");
    }
    flagDoNotRepaintAfterChange = true;//avoid flicker
    zoom(1.0); // set to 100%
    int viewWid = myGanttView->myCanvasView->viewport()->width();
    int timeWid =  getCoordX(end)-getCoordX(start);
    double fac;
    fac  = ( (double)viewWid)/((double) timeWid  );
    zoom (fac);
    timeWid =  getCoordX(end)-getCoordX(start);
    int count = 0;
    int lastScaleCount = 0;
    while (timeWid >viewWid || ( ( myRealMinorScaleCount != lastScaleCount)  && timeWid*2 < viewWid ) ) {
        lastScaleCount = myRealMinorScaleCount;
        fac = (fac * (double)viewWid)/(double)timeWid;
        zoom (fac);
        timeWid =  getCoordX(end)-getCoordX(start);
        if ( count++ > 10 ) {
            //tqDebug("Exiting while loop in zoomToSelection ");
            break;
        }
    }
    flagDoNotRepaintAfterChange = false;
    updateTimeTable();
    repaint();
    moveTimeLineTo((getCoordX(start)-(viewWid-timeWid)/2));
    // Since we have disconnected autoupdate of scrollbars, we must do it ourselves
    if (myGanttView && myGanttView->myCanvasView)
        myGanttView->myCanvasView->updateScrollBars();
}
void KDTimeHeaderWidget::moveTimeLineTo(int X)
{
    int Y = myGanttView->myCanvasView->contentsY ();
    myGanttView->myCanvasView->setContentsPos (X, Y );
}

void KDTimeHeaderWidget::zoom(double factor, bool absolute)
{
    flagZoomToFit = false;
    if ( factor < 0.000001 ) {
        tqDebug("KDGanttView::zoom() : Zoom factor to low. Nothing zoomed. ");
        return;
    }
    double newZoom;
    if (absolute)
        newZoom = factor;
    else
        newZoom = myZoomFactor * factor;
    double relativeZoom;
    relativeZoom = newZoom / myZoomFactor;

    //tqDebug("zooming relative %f ", relativeZoom);
    //tqDebug("zooming absolute %f ", newZoom);
    int viewWid = myGanttView->myCanvasView->viewport()->width();
    if ( width() * relativeZoom < viewWid && ( newZoom > 1.01 || newZoom < 0.99 ) ) {
        tqDebug("KDGanttView::zoom() : Zoom factor to low for current horizon. ");
        // tqDebug("zooming relative %f, zooming absolute %f, viewWidth %d width %d ", relativeZoom,  newZoom, viewWid, width() );
        return;
    }
    myZoomFactor = newZoom;
    computeTicks();
    // Since we have disconnected autoupdate of scrollbars, we must do it ourselves
    if (myGanttView && myGanttView->myCanvasView)
        myGanttView->myCanvasView->updateScrollBars();
}

/*!
  Sets the start of the horizon of the Gantt chart. If \a start is
  null, the horizon start is computed automatically.

  \param start the start of the horizon
  \sa horizonStart()
*/
void KDTimeHeaderWidget::setHorizonStart( const TQDateTime& start )
{
    myHorizonStart = start;
    flagStartTimeSet = true;
    computeTicks();
}


/*!
  Returns the start of the horizon of the Gantt chart.

  \return the start of the horizon of the Gantt chart
  \sa setHorizonStart()
*/
TQDateTime KDTimeHeaderWidget::horizonStart() const
{
    return myHorizonStart;
}


/*!
  Sets the end of the horizon of the Gantt chart. If \a end is
  null, the horizon end is computed automatically.

  \param end the end of the horizon
  \sa setHorizonEnd()
*/
void KDTimeHeaderWidget::setHorizonEnd( const TQDateTime& start )
{
    myHorizonEnd = start;
    flagEndTimeSet = true;
    computeTicks();

}


/*!
  Returns the end of the horizon of the Gantt chart.

  \return the end of the horizon of the Gantt chart
  \sa setHorizonEnd()
*/
TQDateTime KDTimeHeaderWidget::horizonEnd() const
{
    return myHorizonEnd;
}


/*!
  Configures the unit of the lower scale of the header. The higher
  unit is computed automatically.
  Resets the zoomng factor to 1 (i.e. 100%).

  \param unit the unit of the lower scale of the header.
  \sa scale()
*/
void KDTimeHeaderWidget::setScale(Scale unit )
{
    myScale = unit;
    myZoomFactor = 1.0;
    computeTicks();
    // Since we have disconnected autoupdate of scrollbars, we must do it ourselves
    if (myGanttView && myGanttView->myCanvasView)
        myGanttView->myCanvasView->updateHorScrollBar();
}


/*!
  Returns the unit of the lower scale of the header.

  \return the unit of the lower scale of the header.
  \sa setScale()
*/
KDTimeHeaderWidget::Scale KDTimeHeaderWidget::scale() const
{
    return myScale;
}


/*!
  Sets the maximal allowed time scale of the lower scale of the header.

  \param unit the unit of the lower scale of the header.
  \sa scale()
*/
void KDTimeHeaderWidget::setMaximumScale( Scale unit )
{
    myMaxScale = unit;
    computeTicks();
}


/*!
  Returns the maximal allowed time scale of the lower scale of the header.

  \return the unit of the lower scale of the header.
  \sa setScale()
*/
KDTimeHeaderWidget::Scale  KDTimeHeaderWidget::maximumScale() const
{
    return myMaxScale;
}


/*!
  Sets the minimal allowed time scale of the lower scale of the header.

  \param unit the unit of the lower scale of the header.
  \sa scale()
*/
void  KDTimeHeaderWidget::setMinimumScale( Scale unit )
{
    myMinScale = unit;
    computeTicks();
}


/*!
  Returns the minimal allowed time scale of the lower scale of the header.

  \return the unit of the lower scale of the header.
  \sa setScale()
*/
KDTimeHeaderWidget::Scale  KDTimeHeaderWidget::minimumScale() const
{
    return myMinScale;
}


/*!
  Sets the minimum width a column needs to have. If the size of the
  Gantt chart and the scale would make it necessary to go below this
  limit otherwise, the chart will automatically be made less exact.

  \param width the minimum column width
  \sa minimumColumnWidth()
*/
void KDTimeHeaderWidget::setMinimumColumnWidth( int width )
{
    myMinimumColumWidth =  width;
    computeTicks();
}


/*!
  Returns the minimum width a column needs to have.

  \return the column minimum width
  \sa setMinimumColumnWidth()
*/
int KDTimeHeaderWidget::minimumColumnWidth() const
{
    return myMinimumColumWidth;
}


/*!
  Specifies the format in which to display years. If no years are
  shown, this method has no effect.

  \param format the year format
  \sa yearFormat(), setHourFormat(), hourFormat()
*/
void KDTimeHeaderWidget::setYearFormat( YearFormat format )
{
    myYearFormat =  format;
    computeTicks();
}


/*!
  Returns the format in which to display years.

  \return the year format
  \sa setYearFormat(), setHourFormat(), hourFormat()
*/
KDTimeHeaderWidget::YearFormat KDTimeHeaderWidget::yearFormat() const
{
    return  myYearFormat;
}


/*!
  Specifies the format in which to display hours. If no hours are
  shown, this method has no effect.

  \param format the hour format
  \sa hourFormat(), setYearFormat(), yearFormat()
*/
void KDTimeHeaderWidget::setHourFormat( HourFormat format )
{
    myHourFormat = format;
    computeTicks();
}


/*!
  Returns the format in which to display hours.

  \return the hour format
  \sa setHourFormat(), setYearFormat(), yearFormat()
*/
KDTimeHeaderWidget::HourFormat KDTimeHeaderWidget::hourFormat() const
{
    return myHourFormat;
}


/*!
  Specifies whether ticks should be shown on the major scale.

  \param show true in order to show ticks, false in order to hide them
  \sa showMajorTicks(), setShowMinorTicks(), showMinorTicks()
*/
void KDTimeHeaderWidget::setShowMajorTicks( bool show )
{
    flagShowMajorTicks = show;
    if (show) {
        setShowMinorTicks(false);
    }
    updateTimeTable();
}


/*!
  Returns whether ticks are shown on the major scale.

  \return true if ticks are shown on the major scale
  \sa setShowMajorTicks(), setShowMinorTicks(), showMinorTicks()
*/
bool KDTimeHeaderWidget::showMajorTicks() const
{
    return flagShowMajorTicks;
}


/*!
  Specifies whether ticks should be shown on the minor scale.

  \param show true in order to show ticks, false in order to hide them
  \sa showMinorTicks(), setShowMajorTicks(), showMajorTicks()
*/
void KDTimeHeaderWidget::setShowMinorTicks( bool show )
{
    flagShowMinorTicks = show;
    if (show)
        setShowMajorTicks(false );
    //repaintMe();
    updateTimeTable();
}


/*!
  Returns whether ticks are shown on the minor scale.

  \return true if ticks are shown on the minor scale
  \sa setShowMinorTicks(), setShowMajorTicks(), showMajorTicks()
*/
bool KDTimeHeaderWidget::showMinorTicks() const
{
    return flagShowMinorTicks;
}


/*!
  Sets the background color for the column closest to \a column.

  \param column the column to set the background color for
  \param color the background color
  \sa columnBackgroundColor(), setWeekendBackgroundColor(),
  weekendBackgroundColor()
*/
void KDTimeHeaderWidget::setColumnBackgroundColor( const TQDateTime& column,
                                                   const TQColor& color,
                                                   Scale mini, Scale maxi )
{
    ColumnColorList::iterator it;
    for ( it = ccList.begin(); it != ccList.end(); ++it ) {
        if ((*it).datetime == column) {
            (*it).color = color;
            (*it).minScaleView = mini;
            (*it).maxScaleView = maxi;
            return;
        }
    }
    DateTimeColor newItem;
    newItem.datetime = column;
    newItem.color = color;
    newItem.minScaleView = mini;
    newItem.maxScaleView = maxi;
    ccList.append(newItem);
    updateTimeTable();
}

void KDTimeHeaderWidget::computeIntervals( int height )
{
    IntervalColorList::const_iterator it;
    for ( it = icList.begin(); it != icList.end(); ++it ) {
      (*it)->layout( this, height );
    }
}

void KDTimeHeaderWidget::addIntervalBackgroundColor( KDIntervalColorRectangle* newItem )
{
    icList.append(newItem);
    updateTimeTable();
}

#if 0
bool KDTimeHeaderWidget::changeBackgroundInterval( const TQDateTime& oldstart,
                                                   const TQDateTime& oldend,
                                                   const TQDateTime& newstart,
                                                   const TQDateTime& newend )
{
    IntervalColorList::iterator it;
    for ( it = icList.begin(); it != icList.end(); ++it ) {
        if ((*it).datetime == oldstart && (*it).end == oldend ) {
            IntervalColorList::iterator it2;
            for ( it2 = icList.begin(); it2 != icList.end(); ++it2 ) {
                if ((*it2).datetime == newstart && (*it2).end == newend )
                    return false;
            }
            (*it).datetime = newstart;
            (*it).end = newend;
            updateTimeTable();
            return true;
        }
    }
    return false;
}
bool KDTimeHeaderWidget::deleteBackgroundInterval( const TQDateTime& start,
                                                   const TQDateTime& end)
{
    IntervalColorList::iterator it;
    for ( it = icList.begin(); it != icList.end(); ++it ) {
        if ((*it).datetime == start && (*it).end == end ) {
            //delete  (*it).canvasLine;
            delete  (*it).canvasRect;
            icList.remove(it);
            updateTimeTable();
            return true;
        }
    }
    return false;
}

void KDTimeHeaderWidget::setIntervalBackgroundColor( const TQDateTime& start,
                                                     const TQDateTime& end,
                                                     const TQColor& color,
                                                     Scale mini ,
                                                     Scale maxi )
{

    IntervalColorList::iterator it;
    for ( it = icList.begin(); it != icList.end(); ++it ) {
        if ((*it).datetime == start && (*it).end == end ) {
            (*it).color = color;
            (*it).minScaleView = mini;
            (*it).maxScaleView = maxi;
            return;
        }
    }
    DateTimeColor newItem;
    if ( start <= end ) {
        newItem.datetime = start;
        newItem.end = end;
    } else {
        newItem.datetime = end;
        newItem.end = start;
    }
    newItem.color = color;
    newItem.minScaleView = mini;
    newItem.maxScaleView = maxi;
    //newItem.canvasLine = new KDCanvasLine(myGanttView->myTimeTable,0,Type_is_KDGanttGridItem);
    newItem.canvasRect = new KDCanvasRectangle(myGanttView->myTimeTable,0,Type_is_KDGanttGridItem);
    newItem.canvasRect->setZ(-19);
    icList.append(newItem);
    updateTimeTable();
}
#endif

void KDTimeHeaderWidget::clearBackgroundColor()
{

    IntervalColorList::iterator itic;
    for ( itic = icList.begin(); itic != icList.end(); ++itic ) {
        delete  (*itic);
    }
    ccList.clear();
    icList.clear();
    updateTimeTable();
}
TQDateTime KDTimeHeaderWidget::getDateTimeForIndex(int X, bool local )
{
    int coordX = X;
    if ( !local ) {
        TQPoint p = TQPoint ( X, 1 );
        coordX = myGanttView->myTimeHeaderScroll->viewportToContents(myGanttView->myTimeHeaderScroll->mapFromGlobal( p )).x();

    }
    double secs = (secsFromTo( myRealStart, myRealEnd ) * ((double)coordX))/(double)width();
    double days = secs/86400.0;
    secs = secs - ( ((int) days) *86400.0 );
    return (myRealStart.addDays ( (int) days )).addSecs( (int) secs);
}

//FIXME: This doesn't work quite intuitively (imho) when scale is day
//       and each column containes more than 1 day:
//       1) If a column includes a weekend day, the whole column gets weekend color,
//       2) If a column includes 7 days, either *all* columns get weekend color, or
//          *none* get weekend color (haven't figured out why)
//       Proposal: Only use weekend color if the whole column is a weekend.
//       Alt: Color the area that actually is the weekend.
bool KDTimeHeaderWidget::getColumnColor(TQColor& col,int coordLow, int coordHigh)
{
    if (!flagShowMajorTicks && !flagShowMinorTicks)
        return false;
    TQDateTime start,end;
    start = getDateTimeForIndex(coordLow);
    end = getDateTimeForIndex(coordHigh).addSecs(-1);
    Scale tempScale = myRealScale;
    if (flagShowMajorTicks)
        switch (myRealScale)
            {
            case KDGanttView::Minute: tempScale = KDGanttView::Hour;  break;
            case KDGanttView::Hour: tempScale = KDGanttView::Day   ;  break;
            case KDGanttView::Day: tempScale = KDGanttView::Week   ;  break;
            case KDGanttView::Week: tempScale = KDGanttView::Month  ;  break;
            case KDGanttView::Month: return false   ;  break;
            case KDGanttView::Auto: return false   ;  break;
            }
    //check defined column color
    ColumnColorList::iterator it;
    for ( it = ccList.begin(); it != ccList.end(); ++it ) {
        if ((*it).datetime  >= start && (*it).datetime  <= end) {
            if (tempScale >= (*it).minScaleView &&   tempScale <= (*it).maxScaleView    ) {
                col = (*it).color;
                return true;
            }
        }
    }

    if (tempScale > KDGanttView::Day) return false;

    start = getDateTimeForIndex((coordLow+coordHigh)/2);
    int day = start.date().dayOfWeek ();
    //checkweekdaycolor
    if (weekdayColor[day] != TQt::white) {
        col = weekdayColor[day];
        return true;
    }
    //checkweekendcolor
    int endday = myWeekendDaysEnd;
    col = myWeekendBackgroundColor;
    if (myWeekendDaysStart > myWeekendDaysEnd)
        endday +=7;
    if (day >= myWeekendDaysStart && day <= endday) {
        return true;
    } else {
        if (day+7 >= myWeekendDaysStart && day+7 <= endday) {
            return true;
        }
    }
    return false;
}

/*!
  Returns the background color for the column closes to \a column.

  \param column the column to query the background color for
  \return the background color of the specified column
  \sa setColumnBackgroundColor(), setWeekendBackgroundColor(),
  weekendBackgroundColor()
*/
TQColor KDTimeHeaderWidget::columnBackgroundColor( const TQDateTime& column ) const
{
    TQColor c;
    c = white;
    ColumnColorList::const_iterator ite;
    for ( ite = ccList.begin(); ite != ccList.end(); ++ite ) {
        if ((*ite).datetime == column) {
            c = (*ite).color;
        }
    }
    return c;
}


/*!
  Specifies the background color for weekend days. If no individual
  days are visible on the Gantt chart, this method has no visible
  effect.

  \param color the background color to use for weekend days.
  \sa weekendBackgroundColor(), setWeekendDays(), weekendDays()
*/
void KDTimeHeaderWidget::setWeekendBackgroundColor( const TQColor& color )
{
    myWeekendBackgroundColor = color ;
    updateTimeTable();
}


/*!
  Returns the background color for weekend days.

  \return the background color for weekend days
  \sa setWeekendBackgroundColor(), setWeekendDays(), weekendDays()
*/
TQColor KDTimeHeaderWidget::weekendBackgroundColor() const
{
    return myWeekendBackgroundColor;
}

/*!
  Specifies the background color for week days. If no individual
  days are visible on the Gantt chart, this method has no visible
  effect. The days are specified as an interval of integer values
  where 1 means Monday and 7 means Sunday.

  \param color the background color to use for weekend days.
  \param weekday the day of the week (Monday = 1, Sunday = 7)
  \sa weekendBackgroundColor(), setWeekendDays(), weekendDays()
*/
void KDTimeHeaderWidget::setWeekdayBackgroundColor( const TQColor& color, int  weekday )
{
    weekdayColor[weekday] = color;
    updateTimeTable();
}


/*!
  Returns the background color for weekday days.

  \param the day of the week (Monday = 1, Sunday = 7)
  \return the background color for weekend days
  \sa setWeekendBackgroundColor(), setWeekendDays(), weekendDays()
*/
TQColor KDTimeHeaderWidget::weekdayBackgroundColor(int weekday) const
{
    return weekdayColor[weekday];
}


/*!
  Defines which days are considered weekends. The days are specified
  as an interval of integer values where 1 means Monday and 7 means
  Sunday. In order to define a weekend from Sunday to Monday, specify
  (7,1).

  \param start the first day of the weekend
  \param end the last day of the weekend
  \sa weekendDays(), setWeekendBackgroundColor(), weekendBackgroundColor()
*/
void KDTimeHeaderWidget::setWeekendDays( int start, int end )
{
    myWeekendDaysStart = start;
    myWeekendDaysEnd = end;
    updateTimeTable();
}


/*!
  Returns which days are considered weekends.

  \param start in this parameter, the first day of the weekend is returned
  \param end in this parameter, the end day of the weekend is returned
  \sa setWeekendDays(), setWeekendBackgroundColor(), weekendBackgroundColor()
*/
void KDTimeHeaderWidget::weekendDays( int& start, int& end ) const
{
    start = myWeekendDaysStart;
    end = myWeekendDaysEnd ;
}



/*!
  Sets the number of ticks in the major scale.

  \param count the number of ticks in the major scale
  \sa majorScaleCount(), setMinorScaleCount(), minorScaleCount()
*/
void KDTimeHeaderWidget::setMajorScaleCount( int count )
{
    myMajorScaleCount=count;
    computeTicks();
}


/*!
  Returns the number of ticks per unit in the major scale.

  \return the number of ticks in the major scale
  \sa setMajorScaleCount(), setMinorScaleCount(), minorScaleCount()
*/
int KDTimeHeaderWidget::majorScaleCount() const
{
    return myMajorScaleCount;
}


/*!
  Sets the number of ticks in the minor scale.

  \param count the number of ticks in the minor scale
  \sa minorScaleCount, setMajorScaleCount, majorScaleCount()
*/
void KDTimeHeaderWidget::setMinorScaleCount( int count )
{
    myMinorScaleCount = count;
    computeTicks();
}


/*!
  Returns the number of ticks per unit in the minor scale.

  \return the number of ticks in the minor scale
  \sa setMinorScaleCount(), setMajorScaleCount(), majorScaleCount()
*/
int KDTimeHeaderWidget::minorScaleCount() const
{
    return myMinorScaleCount ;

}


void KDTimeHeaderWidget::resizeEvent ( TQResizeEvent * )
{
    // tqDebug("KDTimeHeaderWidget:: resizeEvent ");
    paintPix.resize( 800, height () );
}


void KDTimeHeaderWidget::updateTimeTable()
{
    //tqDebug("KDTimeHeaderWidget::updateTimeTable() ");
    if (flagDoNotRecomputeAfterChange) return;
    // setting the scrolling steps
    int scrollLineStep = myGridMinorWidth;
    if (showMajorTicks()) {
        TQValueList<int>::iterator intIt = majorTicks.begin();
        scrollLineStep = 5 * myGridMinorWidth;
        if (intIt != majorTicks.end()) {
            int left = *intIt;
            ++intIt;
            if (intIt != majorTicks.end()) {
                scrollLineStep = *intIt-left;
            }
        }
    }
    myGanttView->myCanvasView->horizontalScrollBar()->setLineStep(scrollLineStep);
    myGanttView->myTimeTable->maximumComputedGridHeight = 0;
    myGanttView->myTimeTable->updateMyContent();
}


void KDTimeHeaderWidget::setAutoScaleMinorTickCount( int count )
{
    myAutoScaleMinorTickcount = count;
    computeTicks();

}


int KDTimeHeaderWidget::autoScaleMinorTickCount()
{
    return myAutoScaleMinorTickcount;
}


void KDTimeHeaderWidget::repaintMe(int left,int paintwid, TQPainter* painter)
{
    if (flagDoNotRecomputeAfterChange) return;
    TQColorGroup qcg =TQColorGroup( white, black,white, darkGray,black,gray,gray) ;
    TQPainter* p;
    int offsetLeft = 0;
    if ( paintwid > paintPix.width()-100 )
        paintPix.resize( paintwid+100, height () );
    if ( painter )
        p = painter;
    else {
        p = new TQPainter( &paintPix );
        offsetLeft = left-50;
    }
    if ( mouseDown ) {
        p->fillRect( left-offsetLeft, 0, paintwid, height(), TQBrush(paletteBackgroundColor()) );
        int start ;
        int wid;
        if ( beginMouseDown < endMouseDown ) {
            start = beginMouseDown ;
            wid = endMouseDown - beginMouseDown ;
        } else {
            start = endMouseDown ;
            wid = -endMouseDown + beginMouseDown ;
        }
        p->fillRect( start-offsetLeft, 0, wid, height(), TQBrush(paletteBackgroundColor().dark()) );
    } else {
        if (! painter )
            p->fillRect( left-offsetLeft, 0, paintwid, height(), TQBrush(paletteBackgroundColor()) );
    }
    p->setPen(TQColor(40,40,40));
    TQFont tempFont = p->font();
    tempFont.setWeight(63);
    p->setFont(tempFont);
    int hei1 = myMajorGridHeight,
        hei2 = height(),
        wid1 = myGridMinorWidth;
    int xCoord;
    int lwid = 1;

    TQValueList<TQString>::iterator it;
    TQValueList<int>::iterator intIt = majorTicks.begin();
    for ( it =  majorText.begin(); it !=  majorText.end(); ++it ) {
        xCoord  = (*intIt++);
        if (((*intIt)>= left && xCoord <= left+paintwid)) {
            qDrawShadeLine ( p,xCoord-offsetLeft ,hei1+1, xCoord-offsetLeft, -2, qcg, true, lwid, 1 );
            p->drawText(xCoord+4-offsetLeft,hei1-4,(*it));
        }
    }
    qDrawShadeLine ( p,left-offsetLeft  ,hei1, left+paintwid-offsetLeft, hei1, qcg, true, lwid, 1 );
    int i = 0;
    for ( it =  minorText.begin(); it !=  minorText.end(); ++it ) {
        if (i*wid1 >= left-wid1 && i*wid1 <= left+paintwid) {
            qDrawShadeLine ( p,i*wid1-offsetLeft ,hei1-1, i*wid1-offsetLeft, hei2, qcg, true, lwid, 1 );
            p->drawText(i*wid1+1-offsetLeft,hei1+1,wid1-1,hei2-hei1,TQt::AlignCenter,(*it));
        }
        ++i;
    }
    p->setPen(black);
    p->drawLine(left-offsetLeft,hei1,left+paintwid-offsetLeft,hei1);
    qDrawShadeLine ( p,left-offsetLeft  ,hei2-1, left+paintwid-offsetLeft, hei2-1, qcg, true, lwid, 1 );
    p->drawLine(left-offsetLeft,hei2-1,left+paintwid-offsetLeft,hei2-1);
    if ( !painter ) {
        p->end();
        delete p;
        bitBlt ( this, left, 0, &paintPix, 50, 0, paintwid, height() );
    }
}

// cuts the secs in the DateTime if scale is Minute ,
// the minutes and secs if scale is Hour and so on

TQDateTime KDTimeHeaderWidget::getEvenTimeDate(TQDateTime tempdatetime ,Scale sc)
{
    TQDate tempdate;
    int min, hour;
    int tempMinorScaleCount = myRealMinorScaleCount;
    switch (sc)
        {
        case KDGanttView::Month:
            tempdate = tempdatetime.date();
            while (tempdate.day ()!= 1 )
                tempdate = tempdate.addDays(-1);
            //while (tempdate.month ()!= 1 )
            //tempdate = tempdate.addMonths(-1);
            tempdatetime = TQDateTime (tempdate, TQTime (0,0));
            break;
        case KDGanttView::Week:
            tempdate = tempdatetime.date();
            while (tempdate.dayOfWeek ()!= TDEGlobal::locale()->weekStartDay())
                tempdate = tempdate.addDays(-1);
            //tempdate = tempdate.addDays(-7);
            tempdatetime = TQDateTime (tempdate, TQTime (0,0));
            break;
        case KDGanttView::Day:
            tempdatetime = TQDateTime (tempdatetime.date(), TQTime ( 0,0 ) );
            break;
        case KDGanttView::Hour:
            hour = tempdatetime.time().hour();
            while (24%tempMinorScaleCount > 0 && 24%tempMinorScaleCount < 24)
                ++tempMinorScaleCount;
            hour = ( hour /tempMinorScaleCount)*tempMinorScaleCount;
            tempdatetime = TQDateTime (tempdatetime.date(), TQTime (hour, 0 ));
            break;
        case KDGanttView::Minute:
            min = tempdatetime.time().minute();
            while (60%tempMinorScaleCount > 0 && 60%tempMinorScaleCount < 60)
                ++tempMinorScaleCount;
            // tqDebug("myMinorScaleCount %d %d %d",myMinorScaleCount, myRealMinorScaleCount, tempMinorScaleCount);
            min = (min /tempMinorScaleCount)*tempMinorScaleCount;
            tempdatetime = TQDateTime (tempdatetime.date(), TQTime (tempdatetime.time().hour(),min ));

            break;
        case KDGanttView::Auto:
            break;
        }
    return tempdatetime;
}


void KDTimeHeaderWidget::computeRealScale(TQDateTime start)
{

    if (myScale ==KDGanttView::Auto) {
        //tqDebug("Autoscale ");
        //double secsPerMinor = (((double)start.daysTo(myHorizonEnd))* 86400.00)/((double)myAutoScaleMinorTickcount);
        double secsPerMinor = (((double)start.secsTo(myHorizonEnd)))/((double)myAutoScaleMinorTickcount);
        secsPerMinor /= myZoomFactor;
        if (secsPerMinor <= 1800) {
            myRealScale =  KDGanttView::Minute;
            myRealMinorScaleCount = (int) secsPerMinor/60;
        } else {
            if (secsPerMinor <= 12*3600) {
                myRealScale =  KDGanttView::Hour;
                myRealMinorScaleCount = (int)  secsPerMinor/3600;
            } else {
                if (secsPerMinor <= 24*3600*3) {
                    myRealScale =  KDGanttView::Day;
                    myRealMinorScaleCount = (int)  secsPerMinor/(3600*24);
                } else {
                    if (secsPerMinor <= 24*3600*14) {
                        myRealScale =  KDGanttView::Week;
                        myRealMinorScaleCount =  (int) secsPerMinor/(3600*24*7);
                    } else {
                        myRealScale =  KDGanttView::Month;
                        myRealMinorScaleCount =  (int) secsPerMinor/(3600*24*30);

                    }
                }
            }
        }
        if(myRealMinorScaleCount == 0)
            myRealMinorScaleCount = 1;
        myRealMajorScaleCount = 1;
    }
    else {
        //tqDebug("Fixed scale ");
        myRealScale = myScale;
        if (myRealScale > myMaxScale)
            myRealScale = myMaxScale;
        if (myRealScale < myMinScale)
            myRealScale = myMinScale;
        myRealMinorScaleCount = (int) ( ((double)myMinorScaleCount) /myZoomFactor );
        double tempZoom = myZoomFactor;
        myRealMajorScaleCount =  myMajorScaleCount;
        while (myRealMinorScaleCount == 0) {
            if (myRealScale  == myMinScale) {
                myRealMinorScaleCount = 1;
                break;
            }
            switch (myRealScale)
                {
                case KDGanttView::Minute:
                    myRealMinorScaleCount = 1;
                    return;
                    break;
                case KDGanttView::Hour:
                    myRealScale = KDGanttView::Minute;
                    tempZoom = tempZoom/60;
                    break;
                case KDGanttView::Day:
                    myRealScale = KDGanttView::Hour;
                    tempZoom = tempZoom/24;
                    break;
                case KDGanttView::Week:
                    myRealScale = KDGanttView::Day;
                    tempZoom = tempZoom/7;
                    break;
                case KDGanttView::Month:
                    myRealScale =  KDGanttView::Week ;
                    tempZoom = tempZoom*7/30;
                    break;
                case KDGanttView::Auto:
                    break;
                }
            myRealMinorScaleCount =  (int) ( myMinorScaleCount /tempZoom );
        }
    }
}


void KDTimeHeaderWidget::computeTicks(bool doNotComputeRealScale)
{
    if (flagDoNotRecomputeAfterChange) return;
    bool block = myGanttView->myTimeTable->blockUpdating();
    myGanttView->myTimeTable->setBlockUpdating( true );
    //tqDebug("computeticks ");
    majorTicks.clear();
    minorText.clear();
    majorText.clear();
    if ( !doNotComputeRealScale )
        saveCenterDateTime();
    if (!doNotComputeRealScale)
        computeRealScale(myHorizonStart);
    myRealStart = getEvenTimeDate(myHorizonStart ,myRealScale);
    if (!doNotComputeRealScale)
        computeRealScale(myRealStart);
    int tempMinorScaleCount = myRealMinorScaleCount,
        tempMajorScaleCount = myRealMajorScaleCount;
    int minorItems,minorPerMajor = 1;
    minorItems = (int)  (secsFromTo( myRealStart, myHorizonEnd)/60.0);
    //tqDebug("tempMinorScaleCount %d ", tempMinorScaleCount);
    TQPainter p(this);
    int Width, Height;
    TQString testTextMinor,testTextMajor, tempStr;
    TQRect itemRectMinor, itemRectMajor;
    TQDate tempDate = myRealStart.date();
    myRealEnd = myRealStart;
    // preparing the testtext for the differennt scales
    switch (myRealScale)
        {
            // the x in testTextMajor is added to reserve a little bit more space
        case KDGanttView::Minute:
            testTextMinor = "60";
            if (myHourFormat == KDGanttView::Hour_12)
                testTextMajor = "Mon Aug 30, 12 AMx";
            else
                testTextMajor = "Mon Aug 30, 24:00x";
            minorPerMajor = 6000;
            break;
        case KDGanttView::Hour:
            minorItems = minorItems/60;
            if (myHourFormat == KDGanttView::Hour_24)
                testTextMinor = "24x";
            else
                testTextMinor = "12 AM";
            testTextMajor = "Mon Aug 30, x";
            if ( yearFormat() != KDGanttView::NoDate )
                testTextMajor += getYear(TQDate::currentDate());
            minorPerMajor = 2400;
            break;
        case KDGanttView::Day:
            minorItems = minorItems/(60*24);
            testTextMinor = "88";
            testTextMajor = "Aug 30, x"+getYear(TQDate::currentDate());
            minorPerMajor = 700;
            break;
        case KDGanttView::Week:
            minorItems = minorItems/(60*24*7);
            testTextMinor = "88";
            testTextMajor = "Aug x"+getYear(TQDate::currentDate());
            minorPerMajor = 435; // 435 = 365days/12months/7days * 100
            break;
        case KDGanttView::Month:
            minorItems = (minorItems*12)/(60*24*365);
            testTextMinor = "M";
            testTextMajor = "x"+getYear(TQDate::currentDate());
            minorPerMajor = 1200;
            break;
        case KDGanttView::Auto:
            tqDebug("KDGanttView::Internal Error in KDTimeHeaderWidget::computeTicks() ");
            tqDebug("             RealScale == Auto : This may not be! ");
            break;
        }
    itemRectMinor = p.boundingRect ( 10, 10, 2, 2, TQt::AlignLeft,testTextMinor);
    itemRectMajor = p.boundingRect ( 10, 10, 2, 2, TQt::AlignLeft,testTextMajor);
    p.end();
    //tqDebug("     tempMinorScaleCount %d ", tempMinorScaleCount);
    Height = itemRectMinor.height()+itemRectMajor.height()+11;
    Width = (itemRectMinor.width()+5);
    if (Width < minimumColumnWidth()) Width = minimumColumnWidth();
    // if the desired width is greater than the maximum width of this widget
    // increase the minorscalecount
    int maxWid = myGanttView->myCanvasView->viewport()->width();
    if (!flagZoomToFit)
        maxWid = maximumWidth();
    while((minorItems/tempMinorScaleCount+1)*Width > maxWid)
        ++tempMinorScaleCount;
    //tqDebug("             tempMinorScaleCount %d ", tempMinorScaleCount);
    mySizeHint = (minorItems/tempMinorScaleCount+1)*Width;
    switch (myRealScale)
        {
        case KDGanttView::Minute:
            if (tempMinorScaleCount < 60)
                while (60%tempMinorScaleCount > 0 && 60%tempMinorScaleCount < 60)
                    ++tempMinorScaleCount;
            if (tempMinorScaleCount >= 60) {
                myRealScale = KDGanttView::Hour;
                myRealMinorScaleCount = tempMinorScaleCount/ 60;
                // myRealMinorScaleCount = 1;
                myRealMajorScaleCount = 1;
                tqDebug("KDGantt::Overzoom:Rescaling from Minute to Hour");
                myGanttView->myTimeTable->setBlockUpdating( block );
                emit myGanttView->rescaling( KDGanttView::Hour );
                computeTicks(true);
                return;
            }
            break;
        case KDGanttView::Hour:
            while (24%tempMinorScaleCount > 0 && 24%tempMinorScaleCount < 24)
                ++tempMinorScaleCount;
            if (tempMinorScaleCount >= 24) {
                myRealScale = KDGanttView::Day;
                myRealMinorScaleCount = tempMinorScaleCount/ 24;
                //myRealMinorScaleCount = 1;
                myRealMajorScaleCount = 1;
                tqDebug("KDGantt::Overzoom:Rescaling from Hour to Day");
                myGanttView->myTimeTable->setBlockUpdating( block );
                emit myGanttView->rescaling( KDGanttView::Day );
                computeTicks(true);
                return;
            }
            break;
        default:
            break;
        }
    //flagZoomToFit = false;
    while((minorItems/tempMinorScaleCount+1)*Width < myMinimumWidth ) {
        ++minorItems;
    }
    minorItems = (minorItems/tempMinorScaleCount)+1;
    // if not enough space for the text of the major scale, increase majorscalecount
    minorPerMajor = (minorPerMajor*tempMajorScaleCount)/tempMinorScaleCount;
    // checking, if enough space for majorscale
    // if not, increasing MajorScaleCount

    while ((minorPerMajor*Width)/100 < itemRectMajor.width()) {
        minorPerMajor = minorPerMajor/tempMajorScaleCount;
        ++tempMajorScaleCount;
        minorPerMajor = minorPerMajor*tempMajorScaleCount;

    }
    // now we have the fixed  width of the minorscale computed
    myGridMinorWidth = Width;
    // the width of this widget is the gridwidth * the amount of items
    Width *= minorItems;
    // if size changed, reset geometry
    if (width() != Width   || height() != Height  )
        {
            resize( Width, Height );
            emit  sizeChanged( Width );
        }
    myMajorGridHeight = itemRectMajor.height()+5;
    TQTime tempTime = myRealStart.time();
    TQDateTime tempDateTime;
    int i;
    const KCalendarSystem * calendar = TDEGlobal::locale()->calendar();
    switch (myRealScale)
        {
        case KDGanttView::Minute:
            myRealEnd = myRealEnd.addSecs((minorItems)*tempMinorScaleCount*60);
            for ( i = 0; i < minorItems;++i) {
                tempStr.setNum(tempTime.minute());
                minorText.append(tempStr);
                tempTime = tempTime.addSecs(60*tempMinorScaleCount);
            }
            tempDateTime = myRealStart;
            while (tempDateTime.time().minute() != 0)
                tempDateTime = tempDateTime.addSecs(60);
            while (tempDateTime < myRealEnd) {
                majorTicks.append( getCoordX(tempDateTime));
                tempStr.setNum(tempDateTime.date().day());
                if ( yearFormat() == KDGanttView::NoDate ) {
                    tempStr = calendar->weekDayName( tempDateTime.date() )+", "
                        +getHour(tempDateTime.time());
                } else {
                    tempStr = calendar->weekDayName( tempDateTime.date(), true )+" "+
                        calendar->monthName( tempDateTime.date().month(), tempDateTime.date().year(), true)+ " "+
                        tempStr+", "+getHour(tempDateTime.time());
                }

                majorText.append(tempStr);
                tempDateTime = tempDateTime.addSecs(3600*tempMajorScaleCount);
            }
            majorTicks.append( getCoordX(tempDateTime));
            break;

        case KDGanttView::Hour:
            myRealEnd = myRealEnd.addSecs(minorItems*tempMinorScaleCount*60*60);

            for ( i = 0; i < minorItems;++i) {
                tempStr = getHour(tempTime);
                minorText.append(tempStr);
                tempTime = tempTime.addSecs(3600*tempMinorScaleCount);
            }
            tempDateTime = myRealStart;
            while (tempDateTime.time().hour() != 0)
                tempDateTime = tempDateTime.addSecs(3600);
            while (tempDateTime < myRealEnd) {
                majorTicks.append( getCoordX(tempDateTime));
                tempStr.setNum(tempDateTime.date().day());
                if ( yearFormat() == KDGanttView::NoDate ) {
                    tempStr = calendar->weekDayName( tempDateTime.date() );
                } else {
                    tempStr = calendar->weekDayName( tempDateTime.date(), true )+" "+
                        calendar->monthName( tempDateTime.date().month(), tempDateTime.date().year(), true)+ " "+
                        tempStr+", "+getYear(tempDateTime.date());
                }
                majorText.append(tempStr);
                tempDateTime = tempDateTime.addDays(tempMajorScaleCount);
            }
            majorTicks.append( getCoordX(tempDateTime));
            break;
        case KDGanttView::Day:
            myRealEnd = myRealEnd.addDays(minorItems*tempMinorScaleCount);
            for ( i = 0; i < minorItems;++i) {
                if (tempMinorScaleCount == 1)
                    minorText.append((calendar->weekDayName(tempDate, true)).left(1)); //TODO: BIDI
                else
                    minorText.append(TQString::number(tempDate.day()));
                tempDate = tempDate.addDays(tempMinorScaleCount);
            }
            tempDate = myRealStart.date();
            while (tempDate.dayOfWeek() != TDEGlobal::locale()->weekStartDay())
                tempDate = tempDate.addDays(1);
            while (tempDate < myRealEnd.date()) {
                majorTicks.append( getCoordX(tempDate));
                tempStr.setNum(tempDate.day());
                tempStr = calendar->monthName(tempDate.month(), tempDate.year(), true)+ " "+
                    tempStr+", "+getYear(tempDate);
                majorText.append(tempStr);
                tempDate = tempDate.addDays(7*tempMajorScaleCount);
            }
            majorTicks.append( getCoordX(tempDate));
            break;
        case KDGanttView::Week:
            myRealEnd = myRealEnd.addDays(minorItems*tempMinorScaleCount*7);
            for ( i = 0; i < minorItems;++i) {
                tempStr.setNum(tempDate.day());
                minorText.append(tempStr);
                tempDate = tempDate.addDays(7*tempMinorScaleCount);
            }
            tempDate = myRealStart.date();
            while (tempDate.day() != TDEGlobal::locale()->weekStartDay())
                tempDate = tempDate.addDays(1);
            while (tempDate < myRealEnd.date()) {
                majorTicks.append( getCoordX(tempDate));
                tempStr = calendar->monthName(tempDate.month(), tempDate.year(), true)+ " "+getYear(tempDate);
                majorText.append(tempStr);
                tempDate = tempDate.addMonths(tempMajorScaleCount);
            }
            majorTicks.append( getCoordX(tempDate));
            break;
        case KDGanttView::Month:
            myRealEnd = myRealEnd.addMonths(minorItems*tempMinorScaleCount);
            for ( i = 0; i < minorItems;++i) {
                minorText.append((calendar->monthName(tempDate.month(), tempDate.year(), true)).left(1)); //TODO: BIDI
                tempDate = tempDate.addMonths(tempMinorScaleCount);
            }
            tempDate = myRealStart.date();
            while (tempDate.month() != 1)
                tempDate = tempDate.addMonths(1);
            while (tempDate < myRealEnd.date()) {
                majorTicks.append( getCoordX(tempDate));
                tempStr = getYear(tempDate);
                majorText.append(tempStr);
                tempDate = tempDate.addYears(tempMajorScaleCount);
            }
            majorTicks.append( getCoordX(tempDate));
            break;
        case KDGanttView::Auto:
            break;
        }

    if (flagDoNotRepaintAfterChange) {
        myGanttView->myTimeTable->setBlockUpdating( block );
        return;
    }
    //tqDebug("KDTimeHeaderWidget width %d, viewport width %d  ",width (), myGanttView->myCanvasView->viewport()->width());
    myGanttView->myTimeTable->setBlockUpdating( block );
    updateTimeTable();
    centerDateTime(myCenterDateTime);
    repaint();
}


void KDTimeHeaderWidget::saveCenterDateTime()
{
    double wid = width();
    double allsecs = secsFromTo( myRealStart, myRealEnd );
    double center = myGanttView->myCanvasView->viewport()->width();
    center = center / 2;
    center = center + myGanttView->myCanvasView->contentsX();
    double secs = (allsecs*center)/wid;
    double days = secs/86400.0;
    secs = secs - ( (int) days *86400.0 );
    myCenterDateTime =  (myRealStart.addDays ( (int) days )).addSecs( (int) secs);
}


void KDTimeHeaderWidget::centerDateTime( const TQDateTime& center )
{
     moveTimeLineTo(getCoordX( center )-(myGanttView->myCanvasView->viewport()->width() /2));
    //  tqDebug("centerDateTime %s %d %d", center.toString().latin1(),getCoordX( center ),(myGanttView->myCanvasView->viewport()->width() /2) );

}


void KDTimeHeaderWidget::paintEvent(TQPaintEvent *p)
{
    repaintMe(p->rect().x(),p->rect().width());
}


int KDTimeHeaderWidget::getCoordX(TQDate date)
{
    int wid = width();
    int daysAll = myRealStart.daysTo(myRealEnd);
    if (daysAll == 0) return 0;
    int days = myRealStart.daysTo(TQDateTime(date));
    return (wid *days) /daysAll;
}


int KDTimeHeaderWidget::getCoordX(TQDateTime datetime)
{
    double wid = width();
    double secsAll = secsFromTo( myRealStart, myRealEnd );
    if (secsAll == 0.0) return 0;
    double secs = secsFromTo( myRealStart, datetime);
    return ((int)((wid *(secs /secsAll))+0.5));
}


TQString KDTimeHeaderWidget::getYear(TQDate date)
{
    TQString ret;
    ret.setNum(date.year());
    switch (yearFormat()) {
    case KDGanttView::FourDigit:
        // nothing to do
        break;
    case KDGanttView::TwoDigit:
        ret = ret.right(2);
        break;
    case KDGanttView::TwoDigitApostrophe:
        ret = "'"+ret.right(2);
        break;
    case KDGanttView::NoDate:
        // nothing to do
        break;
    }
    return ret;
}


TQString KDTimeHeaderWidget::getHour(TQTime time)
{
    TQString ret;
    int hour = time.hour();
    if (myHourFormat == KDGanttView::Hour_12) {
        if (hour >= 12) {
            if (hour > 12) hour -=12;
            ret.setNum(hour);
            ret = ret +" PM";
        } else {
            if (hour == 0) hour = 12;
            ret.setNum(hour);
            ret = ret +" AM";
        }
    } else {
        if (myHourFormat == KDGanttView::Hour_24)
            ret.setNum(hour);
        else {
            ret.setNum(hour);
            ret += ":00";
        }
    }
    return ret;
}


void KDTimeHeaderWidget::mousePressEvent ( TQMouseEvent * e )
{
    mouseDown = false;
    switch ( e->button() ) {
    case Qt::LeftButton:
        mouseDown = true;
        beginMouseDown = e->pos().x();
        endMouseDown = e->pos().x();
        break;
    case Qt::RightButton:
        if (flagShowPopupMenu)
            myPopupMenu->popup(e->globalPos());
        break;
    case Qt::MidButton:
        break;
    default:
        break;
    }

}


void KDTimeHeaderWidget::mouseReleaseEvent ( TQMouseEvent *  )
{
    if ( mouseDown ) {
        mouseDown = false;
        // zoom to selection getDateTimeForIndex(
        int start, end;
        if ( beginMouseDown < endMouseDown ) {
            start = beginMouseDown;
            end = endMouseDown;
        } else {
            start = endMouseDown;
            end = beginMouseDown;
        }
        if (start < 0 )
            start = 0;
        if ( end > width() )
            end = width();
        //tqDebug("start %s ",getDateTimeForIndex(start).toString().latin1() );
        //tqDebug("end %s ",getDateTimeForIndex(end).toString().latin1() );
        emit myGanttView->timeIntervalSelected( getDateTimeForIndex(start),getDateTimeForIndex(end) );
        emit myGanttView->timeIntervallSelected( getDateTimeForIndex(start),getDateTimeForIndex(end) );
        //zoomToSelection( getDateTimeForIndex(start),getDateTimeForIndex(end) );
    }
    mouseDown = false;
    repaint();
}


void KDTimeHeaderWidget::mouseDoubleClickEvent ( TQMouseEvent *  )
{

}


void KDTimeHeaderWidget::mouseMoveEvent ( TQMouseEvent * e )
{
    if ( mouseDown ) {
        if ( e->pos().y() < -height() || e->pos().y() > 2* height() ) {
            mouseDown = false;
            repaint();
            return;
        }
        endMouseDown = e->pos().x();
        //repaint;
        int val = -1;
        if (endMouseDown <  -x() ) {
            val = myGanttView->myCanvasView->horizontalScrollBar()->value() -
                myGanttView->myCanvasView->horizontalScrollBar()->lineStep();
            if ( val < 0 ) {
                val = 0;
            }
        }
        if (endMouseDown >  -x() +parentWidget()->width() ) {
            val = myGanttView->myCanvasView->horizontalScrollBar()->value() +
                myGanttView->myCanvasView->horizontalScrollBar()->lineStep();

        }
        repaintMe(-x(),parentWidget()->width());
        if ( val > -1 ) {
            if ( val > myGanttView->myCanvasView->horizontalScrollBar()->maxValue() ) {
                val = myGanttView->myCanvasView->horizontalScrollBar()->maxValue();
            }
            myGanttView->myCanvasView->horizontalScrollBar()->setValue( val );
        }
        //tqDebug("mousemove %d %d %d %d",endMouseDown, -x(),parentWidget()->width() , e->pos().y());
    }
}


/* ***************************************************************
   KDLegendWidget:: KDLegendWidget
   ***************************************************************** */
KDLegendWidget:: KDLegendWidget( TQWidget* parent,
                                 KDGanttMinimizeSplitter* legendParent ) :
    KDGanttSemiSizingControl ( KDGanttSemiSizingControl::Before, Qt::Vertical,
                               parent)
{
    myLegendParent = legendParent;
    dock = 0;
    scroll = new TQScrollView( legendParent );
    setMaximizedWidget( scroll );

    setMinimizedWidget( myLabel = new TQLabel( i18n( " Legend is hidden" ), this) );
    setGeometry( 0, 0, 50, 50 );
    myLegend = 0;
    clearLegend();
    showMe ( false );
}
void KDLegendWidget::setAsDoctwindow( bool dockwin )
{
    if ( (dock == 0 && !dockwin) || ( dock && dockwin  ) )
        return;
    if ( dockwin )
        {
            setMaximizedWidget( 0 );
            showMe ( false );
            if ( dock ) delete dock;
            dock = new TQDockWindow(TQDockWindow:: OutsideDock,0 );
            dock->resize( 200, 100 );
            dock->setHorizontallyStretchable( true );
            dock->setVerticallyStretchable( true );
            dock->setCaption(i18n("Legend: ") );
            dock->setResizeEnabled (true );
            delete myLegend;
            myLegend = 0;
            delete scroll;
            scroll = new TQScrollView( dock );
            clearLegend();
            dock->setWidget(scroll);
            setMaximizedWidget( dock );
            showMe ( false );

        } else {
            setMaximizedWidget( 0 );
            showMe ( false );
            delete myLegend;
            myLegend = 0;
            delete scroll;
            delete dock;
            dock = 0;
            scroll = new TQScrollView( myLegendParent );
            clearLegend();
            setMaximizedWidget( scroll );
            showMe ( false );
        }

}


bool KDLegendWidget::asDoctwindow( )
{
    if ( dock )
        return true;
    return false;
}


TQDockWindow* KDLegendWidget::dockwindow( )
{
    return dock;
}


void KDLegendWidget::setFont( TQFont font)
{
    myLegend->setFont( font);
    myLabel->setFont( font);
    TQWidget::setFont( font );
}


void KDLegendWidget::drawToPainter( TQPainter *p )
{
    p->drawPixmap( 0, 0, TQPixmap::grabWidget( myLegend ) );
}


TQSize KDLegendWidget::legendSize()
{
    return myLegend->size();
}


TQSize KDLegendWidget::legendSizeHint()
{
    TQApplication::sendPostedEvents( 0, TQEvent::LayoutHint );
    return TQSize( myLegend->sizeHint().width(), myLegend->sizeHint().height()+scroll->horizontalScrollBar()->height());
}


void KDLegendWidget::showMe ( bool show )
{
    minimize( !show );
}


void KDLegendWidget::clearLegend ( )
{
    if ( myLegend ) delete myLegend;
    if ( dock )
        myLegend = new TQGroupBox( 1, Qt::Horizontal, scroll->viewport() );
    else
        myLegend = new TQGroupBox( 1, Qt::Horizontal, i18n( "Legend" ), scroll->viewport() );
    myLegend->setBackgroundColor( TQt::white );
    myLegend->setFont( font() );
    scroll->addChild(  myLegend );
    scroll->setResizePolicy( TQScrollView::AutoOneFit );
    myLegend->layout()->setMargin( 11 );
    myLegend->setFrameStyle( TQFrame::NoFrame );
    if ( dock )
        scroll->setMaximumHeight( 32000 );
    else
        scroll->setMaximumHeight( legendSizeHint().height() );
}


void KDLegendWidget::addLegendItem( KDGanttViewItem::Shape shape, const TQColor& shapeColor, const TQString& text )
{
    TQLabel * temp;
    TQPixmap p = KDGanttView::getPixmap( shape,  shapeColor, TQt::white, 10);
    TQWidget *w = new TQWidget( myLegend );
    w->setBackgroundColor( TQt::white );
    TQHBoxLayout *lay = new TQHBoxLayout( w ,0, 6);
    temp = new TQLabel ( w );
    lay->addWidget( temp, 0, TQt:: AlignRight);
    temp->setPixmap(p);
    temp = new TQLabel ( text, w );
    temp->setBackgroundColor( TQt::white );
    lay->addWidget( temp, 0, TQt:: AlignLeft);
    lay->addStretch();
    if ( dock )
        scroll->setMaximumHeight( 32000 );
    else
        scroll->setMaximumHeight( legendSizeHint().height() );
}


bool KDLegendWidget::isShown ( )
{
    return !isMinimized();
}


KDListView::KDListView(TQWidget* parent, KDGanttView* gantView):TQListView (parent)
{
    myGanttView = gantView;
    setAcceptDrops(true);
    new KDListViewWhatsThis(viewport(),this);
    setRootIsDecorated( true );
    setAllColumnsShowFocus( true );
    addColumn( i18n( "Task Name" ) );
    setSorting( -1 );
    //setVScrollBarMode (TQScrollView::AlwaysOn );
    setHScrollBarMode (TQScrollView::AlwaysOn );
    setDefaultRenameAction(TQListView::Accept);
    setColumnWidthMode ( 0,Maximum  );
    _calendarMode = false;
    // TQObject::connect(this, TQT_SIGNAL (  pressed ( TQListViewItem * )) , this, TQT_SLOT( dragItem( TQListViewItem *))) ;
}


void  KDListView::dragItem( TQListViewItem *  )
{
    // tqDebug("drag ");
    // startDrag();
}
TQString KDListView::getWhatsThisText(TQPoint p)
{
    KDGanttViewItem* item = ( KDGanttViewItem* ) itemAt( p );
    if ( item )
        return item->whatsThisText();
    return i18n( "No item Found" );
}

void  KDListView::setCalendarMode( bool mode )
{
    _calendarMode = mode;
    // setRootIsDecorated ( ! mode );
}

void  KDListView::setOpen(TQListViewItem * item, bool open )
{
    if (! _calendarMode || ! open ) {
        (( KDGanttViewItem*)item)->setCallListViewOnSetOpen( false );
        TQListView::setOpen ( item, open );
        (( KDGanttViewItem*)item)->setCallListViewOnSetOpen( true );
        return;
    }
    // we are in calendarmode
    // in calendarmode only items can be opened which have subitems which have subitems

    TQListViewItem* temp;
    temp = item->firstChild();
    bool openItem = false;
    while (temp) {
        if ( (( KDGanttViewItem*)temp)->displaySubitemsAsGroup() ) {
            temp->setVisible( true );
            openItem = true;
        }
        else {
            temp->setVisible( false );
            //tqDebug(" temp->setVisible( false );");
        }
        temp = temp->nextSibling();
    }
    if ( openItem ) {
        (( KDGanttViewItem*)item)->setCallListViewOnSetOpen( false );
        TQListView::setOpen ( item, open );
        (( KDGanttViewItem*)item)->setCallListViewOnSetOpen( true );
    }
}


void  KDListView::contentsMouseDoubleClickEvent ( TQMouseEvent * e )
{
    TQListView::contentsMouseDoubleClickEvent ( e );
    //if ( ! _calendarMode )
    // TQListView::contentsMouseDoubleClickEvent ( e );
    // else
    {

        emit myGanttView->lvItemDoubleClicked ( (KDGanttViewItem*) itemAt(e->pos() ) );
        emit myGanttView->itemDoubleClicked ( (KDGanttViewItem*) itemAt(e->pos() ) );
    }

}


void  KDListView::drawToPainter ( TQPainter * p, bool drawHeader )
{
    // Draw list
    drawAllContents ( p, 0, 0, contentsWidth(), contentsHeight() );
    if (!drawHeader) {
        return;
    }
    // Draw headers
    TQPen pen = TQPen(TQt::lightGray, 1);
    p->save();
    TQHeader *h = header();
    for (int s = 0; s < h->count(); ++s) {
        TQRect r = h->sectionRect(s);
        if (s==0) {
            p->translate(0, -r.height());
        }
        //kdDebug()<<s<<": "<<h->label(s)<<" "<<r<<endl;
        p->drawText(r.x()+2, r.y(), r.width()-2, r.height(), columnAlignment(s)|TQt::AlignVCenter, h->label(s), -1);
        p->save();
        p->setPen(pen);
        p->drawRect(r.x(), r.y()+1, r.width(), r.height()-2);
        p->restore();

    }
    p->restore();
}

int KDListView::buildDrawables(TQPtrList<KDListView::DrawableItem> &lst, int level, int ypos, TQListViewItem *item, int ymin, int ymax) const {
    int y = ypos;
    int ih = item->height();
    if (y < ymin && y+ih > ymin) {
        y = ymin; // include partial item at top
    }
    if (y >= ymin && y < ymax) { // include partial item at bottom
        KDListView::DrawableItem *dr = new KDListView::DrawableItem(level, y, item);
        lst.append(dr);
        //kdDebug()<<k_funcinfo<<level<<", "<<y<<" : "<<item->text(0)<<endl;
    }
    y += ih;
    if (item->isOpen()) {
        TQListViewItem *child = item->firstChild();
        for (; child; child = child->nextSibling()) {
            y = buildDrawables(lst, level+1, y, child, ymin, ymax);
        }
    }
    return y;
}
// This is a copy of TQListView::drawContentsOffset(), with a few changes
// because drawContentsOffset() only draws *visible* items,
// we want to draw *all* items.
// FIXME: Haven't got paintBraches() to work, atm live without it.
void KDListView::drawAllContents(TQPainter * p, int cx, int cy, int cw, int ch) {
    if ( columns() == 0 ) {
        paintEmptyArea( p, TQRect( cx, cy, cw, ch ) );
        return;
    }
    //kdDebug()<<k_funcinfo<<TQRect(cx, cy, cw, ch)<<endl;
    TQPtrList<KDListView::DrawableItem> drawables;
    drawables.setAutoDelete(true);
    TQListViewItem *child = firstChild();
    int level = 0;
    int ypos = 0;
    for (; child; child = child->nextSibling()) {
        ypos = buildDrawables(drawables, level, ypos, child, cy, cy+ch);
    }

    p->setFont( font() );

    TQPtrListIterator<KDListView::DrawableItem> it(drawables);

    TQRect r;
    int fx = -1, x, fc = 0, lc = 0;
    int tx = -1;
    KDListView::DrawableItem * current;

    while ( (current = it.current()) != 0 ) {
        ++it;
        int ih = current->i->height();
        int ith = current->i->totalHeight();
        int c;
        int cs;

        // need to paint current?
        if ( ih > 0 && current->y < cy+ch && current->y+ih > cy ) {
            //kdDebug()<<k_funcinfo<<"Paint: "<<current->i->text(0)<<" y="<<current->y<<endl;
            if ( fx < 0 ) {
                // find first interesting column, once
                x = 0;
                c = 0;
                cs = header()->cellSize( 0 );
                while ( x + cs <= cx && c < header()->count() ) {
                    x += cs;
                    c++;
                    if ( c < header()->count() )
                        cs = header()->cellSize( c );
                }
                fx = x;
                fc = c;
                while( x < cx + cw && c < header()->count() ) {
                    x += cs;
                    c++;
                    if ( c < header()->count() )
                        cs = header()->cellSize( c );
                }
                lc = c;
            }

            x = fx;
            c = fc;
            // draw to last interesting column

            const TQColorGroup &cg = ( palette().inactive() );

            while ( c < lc && !drawables.isEmpty() ) {
                int i = header()->mapToLogical( c );
                cs = header()->cellSize( c );
                r.setRect( x, current->y-cy, cs, ih );
                if ( i == 0 )
                    r.setLeft( r.left() + current->l * treeStepSize() );

                p->save();
                // No need to paint if the cell isn't technically visible
                if ( !( r.width() == 0 || r.height() == 0 ) ) {
                    p->translate( r.left(), r.top() );
                    int ac = header()->mapToLogical( c );
                    // map to Left currently. This should change once we
                    // can really reverse the listview.
                    int align = columnAlignment( ac );
                    if ( align == AlignAuto ) align = AlignLeft;
                    bool sel = current->i->isSelected();
                    if (sel)
                        current->i->setSelected(false);
                    current->i->paintCell( p, cg, ac, r.width(), align );
                    if (sel)
                        current->i->setSelected(sel);
                }
                p->restore();
                x += cs;
                c++;
            }

        }

        const int cell = header()->mapToActual( 0 );

        if ( tx < 0 )
            tx = header()->cellPos( cell );

        // do any children of current need to be painted?
/* FIXME: painting branches doesn't work for some reason...
        if ( ih != ith &&
            rootIsDecorated() &&
            current->y + ith > cy &&
            current->y + ih < cy + ch &&
            tx + current->l * treeStepSize() < cx + cw &&
            tx + (current->l+1) * treeStepSize() > cx ) {
            // compute the clip rectangle the safe way

            int rtop = current->y + ih;
            int rbottom = current->y + ith;
            int rleft = tx + current->l*treeStepSize();
            int rright = rleft + treeStepSize();

            int crtop = TQMAX( rtop, cy );
            int crbottom = TQMIN( rbottom, cy+ch );
            int crleft = TQMAX( rleft, cx );
            int crright = TQMIN( rright, cx+cw );

            r.setRect( crleft, crtop,
                    crright-crleft, crbottom-crtop );

            if ( r.isValid() ) {
                p->save();
                p->translate( rleft, crtop );
                //kdDebug()<<k_funcinfo<<"paintBranches: "<<current->i->text(0)<<endl;

                current->i->paintBranches( p, colorGroup(), treeStepSize(),
                                        rtop - crtop, r.height() );
                p->restore();
            }
        }*/
    }
}

void KDListView::resizeEvent(TQResizeEvent *)
{
    triggerUpdate ();
}
void KDListView::dragEnterEvent ( TQDragEnterEvent * e)
{
    if ( !myGanttView->dropEnabled() ) {
        e->accept( false );
        return;
    }
    myGanttView->lvDragEnterEvent(e);
    //e->accept(KDGanttViewItemDrag::canDecode(e) );
}

void KDListView::dragMoveEvent ( TQDragMoveEvent * e)
{
    if ( !myGanttView->dropEnabled() ) {
        e->accept( false );
        return;
    }
    KDGanttViewItem* draggedItem = 0;
    KDGanttViewItem* gItem = (KDGanttViewItem*)itemAt( e->pos()) ;
    setCurrentItem( gItem );
    if (  e->source() == myGanttView )
        draggedItem = myGanttView->myCanvasView->lastClickedItem;
    // execute user defined dragMoveEvent handling
    if (myGanttView->lvDragMoveEvent ( e , draggedItem, gItem ) )
        return;
    if ( !KDGanttViewItemDrag::canDecode(e) ) {
        e->accept( false );
        return;
    }
    if ( e->source() == myGanttView && gItem ){
        // internal drag - do not allow to drag the item to a subitem of itself
        KDGanttViewItem* pItem = gItem->parent();
        while ( pItem ) {
            if ( pItem == myGanttView->myCanvasView->lastClickedItem ) {
                e->accept( false );
                return;
            }
            pItem = pItem->parent();
        }
        if ( gItem == myGanttView->myCanvasView->lastClickedItem ) {
            e->accept( false );
            return;
        }
    }
    e->accept( true );
}

void KDListView::dragLeaveEvent ( TQDragLeaveEvent * )
{
    //tqDebug("contentsDragLeaveEvent ");
}
void KDListView::dropEvent ( TQDropEvent *e )
{
    if ( !myGanttView->dropEnabled() ) {
        e->accept( false );
        return;
    }
    KDGanttViewItem* gItem = (KDGanttViewItem*)itemAt( e->pos()) ;
    KDGanttViewItem* draggedItem = 0;
    if (  e->source() == myGanttView )
        draggedItem = myGanttView->myCanvasView->lastClickedItem;
    if (myGanttView->lvDropEvent ( e, draggedItem, gItem ))
        return;
    TQString string;
    KDGanttViewItemDrag::decode( e, string );
    KDGanttViewItem* newItem = 0;

    if ( gItem == myGanttView->myCanvasView->lastClickedItem && gItem != 0 ) {
        tqDebug("KDGanttView::Possible bug in drag&drop code ");
        return;
    }

    TQDomDocument doc( "GanttView" );
    doc.setContent( string );
    TQDomElement docRoot = doc.documentElement(); // ChartParams element
    TQDomNode node = docRoot.firstChild();
    bool enable = myGanttView->myTimeTable->blockUpdating( );
    myGanttView->myTimeTable->setBlockUpdating( true );
    while( !node.isNull() ) {
        TQDomElement element = node.toElement();
        if( !element.isNull() ) { // was really an element
            TQString tagName = element.tagName();
            if( tagName == "Items" ) {
                TQDomNode node = element.firstChild();
                while( !node.isNull() ) {
                    TQDomElement element = node.toElement();
                    if( !element.isNull() ) { // was really an element
                        TQString tagName = element.tagName();
                        if( tagName == "Item" ) {
                            if (  gItem )
                                newItem = KDGanttViewItem::createFromDomElement( gItem,
                                                                                 element );
                            else
                                newItem = KDGanttViewItem::createFromDomElement( myGanttView,
                                                                                 element );
                        } else {
                            tqDebug( "Unrecognized tag name: %s", tagName.latin1() );
                            Q_ASSERT( false );
                        }
                    }
                    //tqDebug("next node1 ");
                    node = node.nextSibling();
                }
            }
        }
        //tqDebug("next node2 ");
        node = node.nextSibling();
    }
    newItem->setDisplaySubitemsAsGroup(myGanttView->displaySubitemsAsGroup());
    newItem->resetSubitemVisibility();
    myGanttView->slot_lvDropped(e, draggedItem, gItem);
    myGanttView->myTimeTable->setBlockUpdating( enable );
    myGanttView->myTimeTable->updateMyContent();
    return;
}

TQDragObject * KDListView::dragObject ()
{
    return TQListView::dragObject ();
}

void KDListView::startDrag ()
{
    if ( ! myGanttView->dragEnabled() )
        return;
    KDGanttViewItem* cItem = (KDGanttViewItem*) currentItem ();
    myGanttView->myCanvasView->lastClickedItem = cItem;
    myGanttView->lvStartDrag (cItem);
}

KDCanvasText::KDCanvasText( KDTimeTableWidget* canvas,
                            void* parentItem,
                            int type ) :
    TQCanvasText(canvas)
{
    myParentType = type;
    myParentItem = parentItem;
}


KDCanvasLine::KDCanvasLine( KDTimeTableWidget* canvas,
                            void* parentItem,
                            int type ) :
    TQCanvasLine(canvas)
{
    myParentType = type;
    myParentItem = parentItem;
}


KDCanvasPolygonItem::KDCanvasPolygonItem( KDTimeTableWidget* canvas,
                                          void* parentItem,
                                          int type ) :
    TQCanvasPolygonalItem( canvas )
{
    myParentType = type;
    myParentItem = parentItem;
}


KDCanvasPolygon::KDCanvasPolygon( KDTimeTableWidget* canvas,
                                  void* parentItem,
                                  int type ) :
    TQCanvasPolygon( canvas )
{
    myParentType = type;
    myParentItem = parentItem;
}


KDCanvasEllipse::KDCanvasEllipse( KDTimeTableWidget* canvas,
                                  void* parentItem,
                                  int type ) :
    TQCanvasEllipse( canvas )
{
    myParentType = type;
    myParentItem = parentItem;
}


KDCanvasRectangle::KDCanvasRectangle( KDTimeTableWidget* canvas,
                                      void* parentItem,
                                      int type ) :
    TQCanvasRectangle( canvas )
{
    myParentType = type;
    myParentItem = parentItem;
}




KDGanttCanvasView::KDGanttCanvasView( KDGanttView* sender,TQCanvas* canvas, TQWidget* parent,  const
    char* name ) : TQCanvasView ( canvas, parent, name ),
    movingGVItem( 0 ),
    scrollBarTimer( 0, "scrollBarTimer" )
{
    setHScrollBarMode (TQScrollView::AlwaysOn );
    setVScrollBarMode( TQScrollView::AlwaysOn );
    myToolTip = new KDCanvasToolTip(viewport(),this);
    mySignalSender =  sender;
    currentItem = 0;
    currentLink = 0;
    cuttedItem = 0;
    fromItem = 0;
    fromArea = 0;
    linkItemsEnabled = false;
    mouseDown = false;
    linkLine = new TQCanvasLine(canvas);
    linkLine->hide();
    linkLine->setZ(1000);
    set_Mouse_Tracking(true); // mouse cursor changes over KDIntervalColorRectangle borders
    new KDCanvasWhatsThis(viewport(),this);
    onItem = new TQPopupMenu( this );
    TQPopupMenu * newMenu = new TQPopupMenu( this );
    TQPopupMenu * onView = new TQPopupMenu( this );
    onView->insertItem( i18n( "Summary" ), this,
                        TQT_SLOT ( newRootItem( int ) ), 0, 0 );
    onView->insertItem( i18n( "Event" ), this,
                        TQT_SLOT ( newRootItem( int ) ), 0, 1);
    onView->insertItem( i18n( "Task" ), this,
                        TQT_SLOT ( newRootItem( int ) ), 0, 2 );

    onItem->insertItem( i18n( "New Root" ), onView );
    newMenu->insertItem( i18n( "Summary" ),
                         this, TQT_SLOT ( newChildItem(  int) ), 0, 0 );
    newMenu->insertItem( i18n( "Event" ),
                         this, TQT_SLOT ( newChildItem( int ) ), 0, 1 );
    newMenu->insertItem( i18n( "Task" ),
                         this, TQT_SLOT ( newChildItem( int ) ), 0, 2 );

    onItem->insertItem( i18n( "New Child" ), newMenu );
    TQPopupMenu * afterMenu = new TQPopupMenu( this );
    afterMenu->insertItem( i18n( "Summary" ),
                           this, TQT_SLOT ( newChildItem(  int) ), 0, 0+4 );
    afterMenu->insertItem( i18n( "Event" ),
                           this, TQT_SLOT ( newChildItem( int ) ), 0, 1+4 );
    afterMenu->insertItem( i18n( "Task" ),
                           this, TQT_SLOT ( newChildItem( int ) ), 0, 2+4 );
    onItem->insertItem( i18n( "New After" ), afterMenu );
    TQPopupMenu *pasteMenu = new TQPopupMenu( this );
    pasteMenu->insertItem( i18n( "As Root" ),
                           this, TQT_SLOT ( pasteItem( int ) ), 0, 0 );
    pasteMenu->insertItem( i18n( "As Child" ),
                           this, TQT_SLOT ( pasteItem( int ) ), 0, 1 );
    pasteMenu->insertItem( i18n( "After" ),
                           this, TQT_SLOT ( pasteItem( int ) ), 0, 2 );
    onItem->insertItem( i18n( "Paste" ), pasteMenu, 3 );
    onItem->insertItem( i18n( "Cut Item" ), this, TQT_SLOT ( cutItem() ) );
    onItem->setItemEnabled( 3, false );
    myMyContentsHeight = 0;
    _showItemAddPopupMenu = false;

    TQObject *scrollViewTimer = child( "scrollview scrollbar timer", TQTIMER_OBJECT_NAME_STRING, false );
    Q_ASSERT( scrollViewTimer );
    if ( scrollViewTimer ) {
        disconnect( scrollViewTimer, TQT_SIGNAL(timeout()), this, TQT_SLOT(updateScrollBars() ) );
    }
    // If they needed a scrollbar timer in scrollview...
    connect( &scrollBarTimer, TQT_SIGNAL(timeout()), this, TQT_SLOT(myUpdateScrollBars() ) );

    myScrollTimer = new TQTimer( this, "myScrollTimer" );
    connect( myScrollTimer, TQT_SIGNAL( timeout() ), TQT_SLOT( slotScrollTimer() ) );
    autoScrollEnabled = false;
}


KDGanttCanvasView::~KDGanttCanvasView()
{
    delete myToolTip;
}


void KDGanttCanvasView::setShowPopupMenu( bool show )
{
    _showItemAddPopupMenu = show;
}
bool KDGanttCanvasView::showPopupMenu()
{
    return _showItemAddPopupMenu;
}


void KDGanttCanvasView::moveMyContent( int, int y)
{
    setContentsPos(contentsX(), y);
}

void KDGanttCanvasView::resizeEvent ( TQResizeEvent * e )
{
    int ho = e->oldSize().height();
    int wo = e->oldSize().width();
    int hi = height();
    int wi = width();
    //TQScrollView::blockSignals( true );

    verticalScrollBar()->setUpdatesEnabled( false );
    TQScrollView::resizeEvent ( e ) ;
    if ( ho != hi )
        emit heightResized( viewport()->height());
    if ( wo != wi )
        emit widthResized( viewport()->width() );
    //setMyContentsHeight( 0 ); // via timer
    //TQScrollView::blockSignals( false );
    scrollBarTimer.start(0, true);
}

void KDGanttCanvasView::myUpdateScrollBars()
{
    setMyContentsHeight( 0 );
}
void KDGanttCanvasView::setMyContentsHeight( int hei )
{
    //tqDebug("setMyContentsHeight %d %d ", hei,  myMyContentsHeight);
    if ( hei > 0 )
        myMyContentsHeight = hei;
    verticalScrollBar()->setUpdatesEnabled( true ); // set false in resizeEvent()
    if ( viewport()->height() <= myMyContentsHeight )
        verticalScrollBar()->setRange( 0, myMyContentsHeight- viewport()->height()+1);
    else
        verticalScrollBar()->setRange( 0,0 );
    // testing for unmatching ScrollBar values of timeheader and timetable
    // may happen after external resizing
    if ( horizontalScrollBar()->value() != mySignalSender->myTimeHeaderScroll->horizontalScrollBar()->value() ) {
        // I am the Boss!
        mySignalSender->myTimeHeaderScroll->horizontalScrollBar()->setValue(horizontalScrollBar()->value()  );

    }

}

// Call after *internal* resizing (like addTickRight())
// Then the new scrollbar maxValue is in myTimeHeader.
void KDGanttCanvasView::updateHorScrollBar() {
    //tqDebug("horizontalScrollBar max=%d, myTimeHeaderScroll=%d", horizontalScrollBar()->maxValue(), mySignalSender->myTimeHeaderScroll->horizontalScrollBar()->value());

    horizontalScrollBar()->setRange(mySignalSender->myTimeHeaderScroll->horizontalScrollBar()->minValue(), mySignalSender->myTimeHeaderScroll->horizontalScrollBar()->maxValue());

}

void  KDGanttCanvasView::cutItem( KDGanttViewItem* item )
{
    lastClickedItem = item;
    cutItem();
}
void  KDGanttCanvasView::insertItemAsRoot( KDGanttViewItem* item )
{
    mySignalSender->myListView->insertItem( item  );
    if ( item == cuttedItem )
        cuttedItem = 0;
}
void  KDGanttCanvasView::insertItemAsChild( KDGanttViewItem* parent, KDGanttViewItem* item )
{
    parent->insertItem( cuttedItem );
    if ( item == cuttedItem )
        cuttedItem = 0;
}
void  KDGanttCanvasView::insertItemAfter( KDGanttViewItem* parent , KDGanttViewItem* item )
{
    if ( parent->parent() ) {
        parent->parent()->insertItem( item );
    }
    else
        mySignalSender->myListView->insertItem( item );
    item->moveItem( parent );
    if ( item == cuttedItem )
        cuttedItem = 0;
}

void  KDGanttCanvasView::cutItem()
{
    lastClickedItem->hideSubtree();
    //tqDebug("last clicked %d parent %d ", lastClickedItem  , lastClickedItem->parent());
    if ( lastClickedItem->parent() )
        lastClickedItem->parent()->takeItem(lastClickedItem);
    else
        mySignalSender->myListView->takeItem( lastClickedItem );
    mySignalSender->myTimeTable->updateMyContent();
    if ( cuttedItem )
        delete cuttedItem;
    cuttedItem = lastClickedItem;
    onItem->setItemEnabled( 3, true );

}
// called from the destructor in KDGanttViewItem or KDGanttView

void  KDGanttCanvasView::resetCutPaste( KDGanttViewItem* item )
{
    if ( item == 0 && cuttedItem ) {
        delete cuttedItem;
        cuttedItem = 0;
    }
    if (item == cuttedItem) {
        onItem->setItemEnabled( 3, false );
        cuttedItem = 0;
    }
}

void  KDGanttCanvasView::pasteItem( int type )
{
    if ( !cuttedItem )
        return;
    switch( type ) {
    case 0://root
        mySignalSender->myListView->insertItem( cuttedItem );
        break;
    case 1://child
        lastClickedItem->insertItem( cuttedItem );
        break;
    case 2://after
        if ( lastClickedItem->parent() ) {
            lastClickedItem->parent()->insertItem( cuttedItem );
        }
        else
            mySignalSender->myListView->insertItem( cuttedItem );
        cuttedItem->moveItem( lastClickedItem );
        break;
    default:
        ;
    }
    cuttedItem = 0;
    onItem->setItemEnabled( 3, false );
    mySignalSender->myTimeTable->updateMyContent();
}
void  KDGanttCanvasView::newRootItem(int type)
{
    KDGanttViewItem* temp = 0;
    switch( type ) {
    case 1:
        temp = new KDGanttViewEventItem( mySignalSender, i18n( "New Event" ) );
        break;
    case 0:
        temp = new KDGanttViewSummaryItem( mySignalSender, i18n( "New Summary" ) );
        break;
    case 2:
        temp = new KDGanttViewTaskItem( mySignalSender, i18n( "New Task" ) );
        break;
    default:
        ;
    }
    if ( temp )
        mySignalSender->editItem( temp );
}

void  KDGanttCanvasView::newChildItem( int type )
{
    KDGanttViewItem* temp = 0;
    switch( type ) {
    case 1:
        temp = new KDGanttViewEventItem( lastClickedItem, i18n( "New Event" ) );
        break;
    case 0:
        temp = new KDGanttViewSummaryItem( lastClickedItem, i18n( "New Summary" ) );
        break;
    case 2:
        temp = new KDGanttViewTaskItem( lastClickedItem, i18n( "New Task" ) );
        break;
    case 5:
        if ( lastClickedItem->parent() )
            temp = new KDGanttViewEventItem( lastClickedItem->parent(), lastClickedItem, i18n( "New Event" ) );
        else
            temp = new KDGanttViewEventItem( mySignalSender, lastClickedItem, i18n( "New Event" ) );
        break;
    case 4:
        if ( lastClickedItem->parent() )
            temp = new KDGanttViewSummaryItem( lastClickedItem->parent(), lastClickedItem, i18n( "New Summary" ) );
        else
            temp = new KDGanttViewSummaryItem( mySignalSender, lastClickedItem, i18n( "New Summary" ) );
        break;
    case 6:
        if ( lastClickedItem->parent() )
            temp = new KDGanttViewTaskItem( lastClickedItem->parent(), lastClickedItem, i18n( "New Task" ) );
        else
            temp = new KDGanttViewTaskItem( mySignalSender, lastClickedItem, i18n( "New Task" ) );
        break;


    default:
        ;
    }
    if ( temp )
        mySignalSender->editItem( temp );
}

void  KDGanttCanvasView::drawToPainter ( TQPainter * p )
{
    drawContents ( p, 0, 0, canvas()->width(), canvas()->height() );
}
TQString  KDGanttCanvasView::getToolTipText(TQPoint p)
{
    TQCanvasItemList il = canvas()->collisions ( viewportToContents( p ));
    TQCanvasItemList::Iterator it;
    for ( it = il.begin(); it != il.end(); ++it ) {
        switch (getType(*it)) {
        case Type_is_KDGanttViewItem:
            return (getItem(*it))->tooltipText();
            break;
        case Type_is_KDGanttTaskLink:
            return (getLink(*it))->tooltipText();
            break;
        default:
            break;
        }
    }
    return "";
}

TQString  KDGanttCanvasView::getWhatsThisText(TQPoint p)
{
    TQCanvasItemList il = canvas() ->collisions (viewportToContents( p ));
    TQCanvasItemList::Iterator it;
    for ( it = il.begin(); it != il.end(); ++it ) {
        switch (getType(*it)) {
        case Type_is_KDGanttViewItem:
            return (getItem(*it))->whatsThisText();
            break;
        case Type_is_KDGanttTaskLink:
            return (getLink(*it))->whatsThisText();
            break;
        default:
            break;
        }
    }
    return "";
}


KDGanttCanvasView::MovingOperation KDGanttCanvasView::gvItemHitTest( KDGanttViewItem *item, KDTimeHeaderWidget* timeHeader, const TQPoint &pos )
{
  const int left = timeHeader->getCoordX( item->startTime() );
  const int right = timeHeader->getCoordX( item->endTime() );
  const int width = right - left + 1;
  const int x = pos.x();
  if ( x < left + width / 10 )
    return KDGanttCanvasView::ResizingLeft;
  if ( x > right - width / 10 )
    return KDGanttCanvasView::ResizingRight;
  return KDGanttCanvasView::Moving;
}

/**
   Handles the mouseevent if a mousekey is pressed

   \param e the mouseevent

*/

void KDGanttCanvasView::contentsMousePressEvent ( TQMouseEvent * e )
{
    //tqDebug("mousepress! %d ", this);
    //tqDebug("focus %d ",tqApp->focusWidget());
    setFocus();
    currentLink = 0;
    currentItem = 0;
    movingItem = 0;
    mouseDown = true;
    if (e->button() == Qt::RightButton && mySignalSender->editable()) {
        lastClickedItem = (KDGanttViewItem*) mySignalSender->myListView->itemAt( TQPoint(2,e->pos().y()));
        if ( lastClickedItem ) {
            if ( lastClickedItem->displaySubitemsAsGroup() && ! lastClickedItem->isOpen() ) {
                // findSub subitem
                TQCanvasItemList il = canvas() ->collisions ( e->pos() );
                TQCanvasItemList::Iterator it;
                for ( it = il.begin(); it != il.end(); ++it ) {
                    if ( getType(*it) == Type_is_KDGanttViewItem ) {
                        lastClickedItem = getItem(*it);
                    }
                }
            }
            if ( _showItemAddPopupMenu  )
                onItem->popup(e->globalPos());
        }
    }
    TQCanvasItemList il = canvas() ->collisions ( e->pos() );
    TQCanvasItemList::Iterator it;
    for ( it = il.begin(); it != il.end(); ++it ) {
        switch ( e->button() ) {
        case Qt::LeftButton:
            switch (getType(*it)) {
            case Type_is_KDGanttViewItem:
                currentItem = getItem(*it);
                if (! currentItem->enabled() ) {
                    currentItem = 0;
                } else if (linkItemsEnabled &&
                           !currentItem->isMyTextCanvas(*it)) {
                    fromArea = getItemArea(currentItem, e->pos().x());
                    if (fromArea > 0) {
                        fromItem = currentItem;
                        linkLine->setPoints(e->pos().x(), e->pos().y(), e->pos().x(), e->pos().y());
                        linkLine->show();
                    }
                }
                {
                  KDCanvasRectangle *rect = dynamic_cast<KDCanvasRectangle*>( *it );
                  if ( rect ) {
                    movingGVItem = dynamic_cast<KDGanttViewTaskItem*>( getItem( rect ) );
                    if ( movingGVItem ) {
                      movingStart = e->pos();
                      movingStartDate = movingGVItem->startTime();
                      movingOperation = gvItemHitTest( movingGVItem, mySignalSender->myTimeHeader, e->pos() );
                      if ( movingOperation == Moving && !movingGVItem->isMoveable() )
                        movingGVItem = 0;
                      else if ( movingOperation != Moving && !movingGVItem->isResizeable() )
                        movingOperation = Moving;
                    } else {
                      movingGVItem = 0;
                    }
                  }
                }
                break;
            case Type_is_KDGanttTaskLink:
                currentLink = getLink(*it);
                break;
            case Type_is_KDGanttGridItem:
              if ( (*it)->rtti() == KDIntervalColorRectangle::RTTI ) {
                // Cleaner would be isMovable()/isResizeable() in an interface
                // implemented by all movable objects...
                movingItem = static_cast<TQCanvasRectangle *>(*it);
                movingStart = e->pos();
                KDIntervalColorRectangle* icr = static_cast<KDIntervalColorRectangle *>( movingItem );
                KDIntervalColorRectangle::HitTest hitTest = icr->hitTest( mySignalSender->myTimeHeader, movingStart );
                movingOperation = hitTest == KDIntervalColorRectangle::Start ? ResizingLeft :
                                  hitTest == KDIntervalColorRectangle::End ? ResizingRight :
                                  Moving;
              }
              break;
            default:
                break;
            }
            break;
        case Qt::RightButton:
            switch (getType(*it)) {
            case Type_is_KDGanttViewItem:
                currentItem = getItem(*it);
                if (! currentItem->enabled() )
                    currentItem = 0;
                break;
            case Type_is_KDGanttTaskLink:
                currentLink = getLink(*it);
                break;
            }
            break;
        case Qt::MidButton:
            switch (getType(*it)) {
            case Type_is_KDGanttViewItem:
                currentItem = getItem(*it);
                if (! currentItem->enabled() )
                    currentItem = 0;
                break;
            case Type_is_KDGanttTaskLink:
                currentLink = getLink(*it);
                break;
            }
            break;
        default:
            break;
        }
    }
    if (e->button() == Qt::RightButton ) {
        mySignalSender->gvContextMenuRequested( currentItem, e->globalPos() );
    }
    if (autoScrollEnabled && e->button() == Qt::LeftButton) {
        myScrollTimer->start(50);
    }
}
/**
   Handles the mouseevent if a mousekey is released

   \param e the mouseevent

*/

void KDGanttCanvasView::contentsMouseReleaseEvent ( TQMouseEvent * e )
{
    mouseDown = false;
    static KDGanttViewItem* lastClicked = 0;
    mySignalSender->gvMouseButtonClicked( e->button(), currentItem ,  e->globalPos() );
    //tqDebug("datetime %s ",mySignalSender->getDateTimeForCoordX(e->globalPos().x(), true ).toString().latin1() );
    //tqDebug("mousepos %d %d ",e->pos().x(),e->pos().y() );
    //tqDebug("mouseup ");
    // if ( currentLink || currentItem )
    {
        switch ( e->button() ) {
        case Qt::LeftButton:
            myScrollTimer->stop();
            {
                mySignalSender->itemLeftClicked( currentItem );
                mySignalSender->gvItemLeftClicked( currentItem );
            }
            if ( currentLink )
                mySignalSender->taskLinkLeftClicked( currentLink );
            if (linkItemsEnabled && fromItem) {
                linkLine->hide();
                canvas()->update();
                TQCanvasItemList il = canvas() ->collisions ( e->pos() );
                TQCanvasItemList::Iterator it;
                for ( it = il.begin(); it != il.end(); ++it ) {
                    if (getType(*it) == Type_is_KDGanttViewItem) {
                        KDGanttViewItem *toItem = getItem(*it);
                        if (!toItem->isMyTextCanvas(*it)) {
                            int toArea = getItemArea(toItem, e->pos().x());
                            if (toArea > 0 && toItem && fromItem != toItem) {
                                mySignalSender->linkItems(fromItem, toItem, getLinkType(fromArea, toArea));
                            }
                        }
                        break;
                    }
                }
            }
            fromItem = 0;
            if ( movingGVItem ) {
              mySignalSender->gvItemMoved( movingGVItem );
              movingGVItem = 0;
            }
            break;
        case Qt::RightButton:
            {
                mySignalSender->itemRightClicked( currentItem );
                mySignalSender->gvItemRightClicked( currentItem );

            }
            if ( currentLink )
                mySignalSender->taskLinkRightClicked( currentLink );
            break;
        case Qt::MidButton:
            {
                mySignalSender->itemMidClicked( currentItem );
                mySignalSender->gvItemMidClicked( currentItem );
            }
            if ( currentLink )
                mySignalSender->taskLinkRightClicked( currentLink );
            break;
        default:
            break;
        }
    }
    if ( lastClicked != currentItem )
        mySignalSender->gvCurrentChanged( currentItem );
    lastClicked = currentItem;
    currentLink = 0;
    currentItem = 0;
}
/**
   Handles the mouseevent if a mousekey is doubleclicked

   \param e the mouseevent

*/

void KDGanttCanvasView::contentsMouseDoubleClickEvent ( TQMouseEvent * e )
{
    TQCanvasItemList il = canvas() ->collisions ( e->pos() );

    if ( il.isEmpty() && e->button() == Qt::LeftButton ) {
        //not directly sending a signal here (encapsulation and whatnot)
        mySignalSender->emptySpaceDoubleClicked(e);
        return;
    }

    TQCanvasItemList::Iterator it;
    for ( it = il.begin(); it != il.end(); ++it ) {
        switch ( e->button() ) {
        case Qt::LeftButton:
            switch (getType(*it)) {
            case Type_is_KDGanttViewItem:
                if ( getItem(*it)->enabled() )
                    mySignalSender->itemDoubleClicked(getItem(*it));
                mySignalSender->gvItemDoubleClicked(getItem(*it));
                return;
                break;
            case Type_is_KDGanttTaskLink:
                mySignalSender->taskLinkDoubleClicked(getLink(*it));
                return;
                break;
            default:
                break;
            }
            break;
            /*
              case Qt::RightButton:
              switch (getType(*it)) {
              case Type_is_KDGanttViewItem:
              mySignalSender->itemRightClicked(getItem(*it));
              return;
              break;
              case Type_is_KDGanttTaskLink:
              mySignalSender->taskLinkRightClicked(getLink(*it));
              return;
              break;
              }
              break;
              case Qt::MidButton:
              switch (getType(*it)) {
              case Type_is_KDGanttViewItem:
              mySignalSender->itemMidClicked(getItem(*it));
              return;
              break;
              case Type_is_KDGanttTaskLink:
              mySignalSender->taskLinkMidClicked(getLink(*it));
              return;
              break;
              }
              break;
            */
        default:
            break;
        }
    }
}
/**
   Handles the mouseevent if a mouse button is pressed an the mouse is moved

   \param e the mouseevent

*/

void KDGanttCanvasView::contentsMouseMoveEvent ( TQMouseEvent *e )
{
    if ( !mouseDown ) {
      // Update cursor
      bool found = false;
      TQCanvasItemList il = canvas() ->collisions ( e->pos() );
      TQCanvasItemList::Iterator it;
      for ( it = il.begin(); it != il.end(); ++it ) {
        if ( (*it)->rtti() == KDIntervalColorRectangle::RTTI ) {
          found = true;
          KDIntervalColorRectangle* icr = static_cast<KDIntervalColorRectangle *>( *it );
          KDIntervalColorRectangle::HitTest hitTest = icr->hitTest( mySignalSender->myTimeHeader, e->pos() );
          switch ( hitTest ) {
          case KDIntervalColorRectangle::Start:
          case KDIntervalColorRectangle::End:
            setCursor( splitHCursor );
            break;
          default:
            unsetCursor();
          }
        }
        KDGanttViewItem *gvItem = getItem( *it );
        if ( dynamic_cast<KDGanttViewTaskItem*>( gvItem ) ) {
          found = true;
          MovingOperation op = gvItemHitTest( gvItem, mySignalSender->myTimeHeader, e->pos() );
          switch ( op ) {
            case ResizingLeft:
            case ResizingRight:
              if ( gvItem->isResizeable() )
                setCursor( splitHCursor );
              break;
            default:
              unsetCursor();
          }
        }
      }
      if ( !found )
        unsetCursor();
      return;
    }

    const TQPoint p = e->pos();
    if ( movingItem ) {
      int x = tqRound( movingItem->x() );
      int width = movingItem->width();
      switch( movingOperation ) {
      case Moving:
        x += p.x() - movingStart.x();
        break;
      case ResizingLeft: {
        width = tqRound( movingItem->x() + movingItem->width() - p.x() );
        x = p.x();
        break;
      }
      case ResizingRight:
        width = p.x() - x;
        break;
      }
      movingStart = p;
      if ( movingItem->rtti() == KDIntervalColorRectangle::RTTI ) {
        KDIntervalColorRectangle* icr = static_cast<KDIntervalColorRectangle *>(movingItem);
        const TQDateTime newStart = mySignalSender->myTimeHeader->getDateTimeForIndex(x);
        const TQDateTime newEnd = mySignalSender->myTimeHeader->getDateTimeForIndex(x + width);
        icr->setDateTimes( newStart, newEnd );
        emit mySignalSender->intervalColorRectangleMoved( newStart, newEnd );
        mySignalSender->myTimeHeader->computeIntervals( movingItem->height() );
      }
      canvas()->update();
    }

    if ( movingGVItem ) {
      int dx = movingStart.x() - e->pos().x();
      int x = movingGVItem->middleLeft().x() - dx;
      TQDateTime dt = mySignalSender->getDateTimeForCoordX( x, false );
      int duration = movingGVItem->startTime().secsTo( movingGVItem->endTime() );
      if ( movingOperation == Moving ) {
        movingGVItem->setStartTime( dt );
        movingGVItem->setEndTime( dt.addSecs( duration ) );
      } else if ( movingOperation == ResizingLeft ) {
        movingGVItem->setStartTime( dt );
      } else if ( movingOperation == ResizingRight ) {
        movingGVItem->setEndTime( dt.addSecs( duration ) );
      }
      movingStart = e->pos();
    }

    static int moves = 0;
    if ( (currentLink || currentItem) && (moves < 3) ) {
        ++moves;
    } else {
        moves = 0;
        currentLink = 0;
        currentItem = 0;
    }
    if (autoScrollEnabled)
        mousePos = e->pos()- TQPoint(contentsX(),contentsY()); // make mousePos relative 0
    if (fromItem) {
        //tqDebug("mousemove: linking %s: %d,%d ",fromItem->listViewText().latin1(), e->pos().x(), e->pos().y());
        linkLine->setPoints(linkLine->startPoint().x(), linkLine->startPoint().y(), e->pos().x(), e->pos().y());
        canvas()->update();
    }
    // no action implemented
}
void KDGanttCanvasView::viewportPaintEvent ( TQPaintEvent * pe )
{
    TQCanvasView::viewportPaintEvent ( pe );
}
void KDGanttCanvasView::set_Mouse_Tracking(bool on)
{
    viewport()->setMouseTracking(on);
}
int  KDGanttCanvasView::getType(TQCanvasItem* it)
{
    switch (it->rtti()) {
    case TQCanvasItem::Rtti_Line: return ((KDCanvasLine*)it)->myParentType;
    case TQCanvasItem::Rtti_Ellipse: return ((KDCanvasEllipse *)it)->myParentType;
    case TQCanvasItem::Rtti_Text: return ((KDCanvasText *)it)->myParentType;
    case TQCanvasItem::Rtti_Polygon: return ((KDCanvasPolygon *)it)->myParentType;
    case TQCanvasItem::Rtti_Rectangle:
    case KDIntervalColorRectangle::RTTI:
      return ((KDCanvasRectangle *)it)->myParentType;
    }
    return -1;
}
KDGanttViewItem*  KDGanttCanvasView::getItem(TQCanvasItem* it)
{
    switch (it->rtti()) {
    case TQCanvasItem::Rtti_Line: return (KDGanttViewItem*)  ((KDCanvasLine*)it)->myParentItem;
    case TQCanvasItem::Rtti_Ellipse: return (KDGanttViewItem*)  ((KDCanvasEllipse *)it)->myParentItem;
    case TQCanvasItem::Rtti_Text: return (KDGanttViewItem*) ((KDCanvasText *)it)->myParentItem;
    case TQCanvasItem::Rtti_Polygon: return (KDGanttViewItem*) ((KDCanvasPolygon *)it)->myParentItem;
    case TQCanvasItem::Rtti_Rectangle: return (KDGanttViewItem*) ((KDCanvasRectangle *)it)->myParentItem;

    }
    return 0;
}
KDGanttViewTaskLink*  KDGanttCanvasView::getLink(TQCanvasItem* it)
{
    switch (it->rtti()) {
    case TQCanvasItem::Rtti_Line: return (KDGanttViewTaskLink*)  ((KDCanvasLine*)it)->myParentItem;
    case TQCanvasItem::Rtti_Ellipse: return (KDGanttViewTaskLink*)  ((KDCanvasEllipse *)it)->myParentItem;
    case TQCanvasItem::Rtti_Text: return (KDGanttViewTaskLink*) ((KDCanvasText *)it)->myParentItem;
    case TQCanvasItem::Rtti_Polygon: return (KDGanttViewTaskLink*) ((KDCanvasPolygon *)it)->myParentItem;
    }
    return 0;
}

void KDGanttCanvasView::slotScrollTimer() {
    int mx = mousePos.x();
    int my = mousePos.y();
    int dx = 0;
    int dy = 0;
    if (mx < 0)
        dx = -5;
    else if (mx > visibleWidth())
        dx = 5;
    if (my < 0)
        dy = -5;
    else if (my > visibleHeight())
        dy = TQMIN(5, verticalScrollBar()->maxValue()-verticalScrollBar()->value());

    if (dx != 0 || dy != 0)
        scrollBy(dx, dy);
}

int KDGanttCanvasView::getItemArea(KDGanttViewItem *item, int x) {
    // area can be: no area = 0, Start = 1, Finish = 2
    // TODO: middle (move, dnd), front, back (resize)
    KDTimeTableWidget *tt = dynamic_cast<KDTimeTableWidget *>(canvas());
    if (!tt) {
        tqWarning("Cannot cast canvas to KDTimeTableWidget");
        return 0;
    }
    int area = 0;
    int start = tt->getCoordX(item->startTime());
    int end = start;
    if (item->type() == KDGanttViewItem::Event) {
        x > start ? area = 2 : area = 1;
    } else {
        end = tt->getCoordX(item->endTime());
        if ((end - start)/2 > (x - start))
            area = 1;
        else
            area = 2;
    }
    return area;
}

int KDGanttCanvasView::getLinkType(int from, int to) {
    // from, to should be Start = 1 or Finish = 2
    if ((from == 1) && (to == 1)) {
        return KDGanttViewTaskLink::StartStart;
    }
    if ((from == 1) && (to == 2)) {
        return KDGanttViewTaskLink::StartFinish;
    }
    if ((from == 2) && (to == 1)) {
        return KDGanttViewTaskLink::FinishStart;
    }
    if ((from == 2) && (to == 2)) {
        return KDGanttViewTaskLink::FinishFinish;
    }
    return KDGanttViewTaskLink::None;
}

/*!
  Represents the background color for a given interval of time (across all tasks).
  \sa KDGanttView::addIntervalBackgroundColor
  \param view parent view
 */
KDIntervalColorRectangle::KDIntervalColorRectangle( KDGanttView* view )
  : KDCanvasRectangle( view->timeTableWidget(), 0, Type_is_KDGanttGridItem ),
  mStart(), mEnd()
{
  setZ( -19 );
}

/*!
  \param start start datetime of the time interval
  \param end end datetime of the time interval
 */
void KDIntervalColorRectangle::setDateTimes( const TQDateTime& start,
                                             const TQDateTime& end )
{
  mStart = start;
  mEnd = end;
  if ( mEnd < mStart )
    tqSwap( mStart, mEnd );
}

/*!
  Sets the background color
  \param color the background color
*/
void KDIntervalColorRectangle::setColor( const TQColor& color )
{
  mColor = color;
}

/*!
  \internal
*/
void KDIntervalColorRectangle::layout( KDTimeHeaderWidget* timeHeader, int height )
{
  int left = timeHeader->getCoordX(mStart);
  int right = timeHeader->getCoordX(mEnd);
  if ( right == left )
    ++right;
  setPen( TQPen(TQPen::NoPen) );
  setBrush( TQBrush(mColor, Qt::SolidPattern) );
  setSize( right - left, height );
  move( left, 0 );
  show();
}

/*!
  \internal
*/
KDIntervalColorRectangle::HitTest KDIntervalColorRectangle::hitTest( KDTimeHeaderWidget* timeHeader, const TQPoint& pos ) const
{
  const int left = timeHeader->getCoordX(mStart);
  const int right = timeHeader->getCoordX(mEnd);
  const int width = right - left + 1;
  const int x = pos.x();
  if ( x < left + width / 10 )
    return Start;
  if ( x > right - width / 10 )
    return End;
  return Middle;
}