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kompose/src/komposelayout.cpp

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/***************************************************************************
* Copyright (C) 2004 by Hans Oischinger *
* hans.oischinger@kde-mail.net *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "komposelayout.h"
#include "komposewidget.h"
#include "komposeviewmanager.h"
#include "komposetaskmanager.h"
#include "komposefullscreenwidget.h"
#include <math.h>
#include <twin.h>
#include <kdebug.h>
KomposeLayout::KomposeLayout( KomposeWidget *parent, int type, int dist, const char *name )
: TQObject(parent, name),
spacing(dist),
widgetsChanged(false),
currentRows(0),
currentColumns(0),
parentWidget(parent)
{
setType( type );
currentSize = TQSize( 1, 1 );
}
KomposeLayout::~KomposeLayout()
{}
void KomposeLayout::setType( int t )
{
if ( t == TLAYOUT_TASKCONTAINERS &&
!KomposeSettings::instance()->getDynamicVirtDeskLayout() )
t = TLAYOUT_GENERIC;
layoutType = t;
}
void KomposeLayout::add( KomposeWidget *w )
{
//kdDebug() << "KomposeLayout::add()@%s - Added widget to layout", parent()->className());
//kdDebug() << "KomposeLayout::add() - Added widget to layout");
list.append( w );
widgetsChanged = true;
}
void KomposeLayout::remove( KomposeWidget *w )
{
list.remove( w );
widgetsChanged = true;
}
void KomposeLayout::arrangeLayout()
{
//kdDebug() << "KomposeLayout::arrangeLayout()");
rearrangeContents();
}
void KomposeLayout::rearrangeContents()
{
// Check or empty list
if (list.count() == 0)
{
kdDebug() << "KomposeLayout::rearrangeContents() - empty list... skipping!" << endl;
return;
}
// Check for layout Type and do the work
if (layoutType==TLAYOUT_TASKCONTAINERS)
{
filledContainers.clear();
emptyContainers.clear();
// Check for empty containers
TQPtrListIterator<KomposeWidget> it( list );
KomposeWidget *task;
while ( (task = it.current()) != 0 )
{
++it;
KomposeTaskContainerWidget *containerTask = dynamic_cast<KomposeTaskContainerWidget*>(task);
if ( containerTask->getNumofChilds() > 0 )
{
filledContainers.append( containerTask );
}
else
{
emptyContainers.append( containerTask );
}
}
// Arrange filled containers
TQRect filledRect( 0,
0,
parentWidget->width(),
parentWidget->height() - ( 40 + 2*spacing ) );
// arrange the filled desktops taking 90% of the screen
rearrangeContents( filledRect, filledContainers );
// Arrange empty containers
TQRect emptyRect( 0,
parentWidget->height() - ( 40 + 2*spacing ),
parentWidget->width(),
( 40 + 2*spacing ) );
// arrange the empty widget in one row
rearrangeContents( emptyRect, emptyContainers, 1, -1, false );
}
else // default type (generic)
{
TQRect availRect( 0,
0,
parentWidget->width(),
parentWidget->height());
rearrangeContents( availRect, list );
}
currentSize = parentWidget->size();
widgetsChanged = false;
}
/**
* availRect specifies the size&pos of the contents
* Specify either rows or cols to set a fixed number of those (setting both won't work correctly)
*/
void KomposeLayout::rearrangeContents( const TQRect& availRect, const TQPtrList<KomposeWidget> widgets, int rows, int columns, bool setMemberRowsCols )
{
// Check or empty list
if (widgets.count() == 0)
{
kdDebug() << "KomposeLayout::rearrangeContents() - empty list... skipping!" << endl;
return;
}
TQPtrListIterator<KomposeWidget> it( widgets );
// Calculate grid's rows & cols
if ( rows != -1 ) // rows have been specified
{
columns = (int)ceil(widgets.count() / rows);
}
else if ( columns != -1 ) // columns have been specified
{
rows = (int)ceil(widgets.count() / columns);
}
else // neither rows nor cols have been specified
{
double parentRatio = (double)availRect.width() / (double)availRect.height();
// Use more columns than rows when parent's width > parent's height
if ( parentRatio > 1 )
{
columns = (int)ceil( sqrt(widgets.count()) );
rows = (int)ceil( (double)widgets.count() / (double)columns );
}
else
{
rows = (int)ceil( sqrt(widgets.count()) );
columns = (int)ceil( (double)widgets.count() / (double)rows );
}
}
kdDebug() << "KomposeLayout::rearrangeContents() - Relayouting " << widgets.count() << " child widgets with " << rows << " rows & " << columns << " columns" << endl;
// Calculate width & height
int w = (availRect.width() - (columns+1) * spacing ) / columns;
int h = (availRect.height() - (rows+1) * spacing ) / rows;
TQValueList<TQRect> geometryRects;
TQValueList<int> maxRowHeights;
// Process rows
for ( int i=0; i<rows; ++i )
{
int xOffsetFromLastCol = 0;
int maxHeightInRow = 0;
// Process columns
for ( int j=0; j<columns; ++j )
{
KomposeWidget *task;
// Check for end of List
if ( (task = it.current()) == 0)
break;
// Calculate width and height of widget
double ratio = task->getAspectRatio();
int widgetw = 100;
int widgeth = 100;
int usableW = w;
int usableH = h;
// use width of two boxes if there is no right neighbour
if (it.atLast() && j!=columns-1)
{
usableW = 2*w;
}
++it; // We need access to the neighbour in the following
// expand if right neighbour has ratio < 1
if (j!=columns-1 && it.current() && it.current()->getAspectRatio() < 1)
{
int addW = w - it.current()->getWidthForHeight(h);
if ( addW > 0 )
{
usableW = w + addW;
}
}
if ( ratio == -1 )
{
widgetw = w;
widgeth = h;
}
else
{
double widthForHeight = task->getWidthForHeight(usableH);
double heightForWidth = task->getHeightForWidth(usableW);
if ( (ratio >= 1.0 && heightForWidth <= usableH) ||
(ratio < 1.0 && widthForHeight > usableW) )
{
widgetw = usableW;
widgeth = (int)heightForWidth;
}
else if ( (ratio < 1.0 && widthForHeight <= usableW) ||
(ratio >= 1.0 && heightForWidth > usableH) )
{
widgeth = usableH;
widgetw = (int)widthForHeight;
}
}
// Set the Widget's size
int alignmentXoffset = 0;
int alignmentYoffset = 0;
if ( i==0 && h > widgeth )
alignmentYoffset = h - widgeth;
if ( j==0 && w > widgetw )
alignmentXoffset = w - widgetw;
TQRect geom( availRect.x() + j * (w + spacing) + spacing + alignmentXoffset + xOffsetFromLastCol,
availRect.y() + i * (h + spacing) + spacing + alignmentYoffset,
widgetw, widgeth );
geometryRects.append(geom);
// Set the x offset for the next column
if (alignmentXoffset==0)
xOffsetFromLastCol += widgetw-w;
if (maxHeightInRow < widgeth)
maxHeightInRow = widgeth;
}
maxRowHeights.append(maxHeightInRow);
}
it.toFirst();
TQValueList<TQRect>::iterator geomIt = geometryRects.begin();
TQValueList<int>::iterator maxRowHeightIt = maxRowHeights.begin();
int topOffset = 0;
for ( int i=0; i<rows; ++i )
{
// Process columns again
for ( int j=0; j<columns; ++j )
{
KomposeWidget *task;
if ( (task = it.current()) == 0)
break;
TQRect geom = *geomIt;
geom.setY( geom.y() + topOffset );
// geom.setHeight( geom.height() - topOffset );
task->setGeometry( geom );
kdDebug() << "KomposeLayout::rearrangeContents() - Put item " << task->className() << " at x: " << geom.x() << " y: " << geom.y() << " with size: " << geom.width() << "x" << geom.height() << endl;
++geomIt;
++it;
}
if ( *maxRowHeightIt-h > 0 )
topOffset += *maxRowHeightIt-h;
++maxRowHeightIt;
}
// Sync cols/rows member vars to current cols/rows
if ( setMemberRowsCols )
{
currentRows = rows;
currentColumns = columns;
}
}
/*
* Search for neighbour (called from outside)
*/
KomposeWidget* KomposeLayout::getNeighbour( const KomposeWidget* widget, int direction, int wrap )
{
kdDebug() << "KomposeLayout::getNeighbour() - Called with list.count: " << list.count() << endl;
if (layoutType==TLAYOUT_TASKCONTAINERS)
{
KomposeWidget* neighbour = 0;
if ( filledContainers.containsRef(widget) )
{
if ( ( neighbour = getNeighbour( filledContainers, widget, direction, WLAYOUT_HORIZONTAL ) ) == 0 )
return emptyContainers.first();
}
else if ( emptyContainers.containsRef(widget) )
{
if ( ( neighbour = getNeighbour( emptyContainers, widget, direction, WLAYOUT_HORIZONTAL ) ) == 0 )
if ( direction == DLAYOUT_TOP )
return filledContainers.last();
else
return filledContainers.first();
}
return neighbour;
}
else if (layoutType==TLAYOUT_GENERIC)
return getNeighbour( list, widget, direction, wrap );
kdDebug() << "KomposeLayout::getNeighbour() - this should never happen!" << endl;
return NULL;
}
/*
* Search for neighbour in the given list (called from inside)
*/
KomposeWidget* KomposeLayout::getNeighbour(
TQPtrList<KomposeWidget> listToSearch,
const KomposeWidget* widget,
int direction,
int wrap )
{
TQPtrListIterator<KomposeWidget> it( listToSearch );
KomposeWidget *task;
KomposeWidget *neighbour;
int index = 0;
if (widget == 0)
{
kdDebug() << "KomposeLayout::getNeighbour() - NULL startWidget given. using first()" << endl;
return listToSearch.first();
}
while ( (task = it.current()) != 0 )
{
if ( task == widget )
{
switch ( direction )
{
case DLAYOUT_RIGHT:
++it;
if ( (index)%currentColumns == currentColumns-1 || ( neighbour = it.current() ) == 0 )
{
if (wrap == WLAYOUT_HORIZONTAL || wrap == WLAYOUT_BOTH )
return listToSearch.at(index+1-currentColumns);
kdDebug() << "KomposeLayout::getNeighbour() - No valid neighbour available" << endl;
return NULL;
}
return neighbour;
case DLAYOUT_LEFT:
--it;
if ( index%currentColumns == 0 || ( neighbour = it.current() ) == 0 )
{
if (wrap == WLAYOUT_HORIZONTAL || wrap == WLAYOUT_BOTH )
if ( (uint)(index+currentColumns-1) < listToSearch.count() )
return listToSearch.at(index+currentColumns-1);
else
return listToSearch.last();
kdDebug() << "KomposeLayout::getNeighbour() - No valid neighbour available" << endl;
return NULL;
}
return neighbour;
case DLAYOUT_TOP:
if ( index < currentColumns || (neighbour = listToSearch.at( index - currentColumns )) == 0)
{
if (wrap == WLAYOUT_VERTICAL || wrap == WLAYOUT_BOTH )
if ( listToSearch.count()%currentColumns == 0 || listToSearch.count()%currentColumns > (uint)(index) )
return listToSearch.at( (currentRows-1)*currentColumns + index );
else
return listToSearch.at( (currentRows-2)*currentColumns + index );
kdDebug() << "KomposeLayout::getNeighbour() - No valid neighbour available" << endl;
return NULL;
}
return neighbour;
case DLAYOUT_BOTTOM:
if ( listToSearch.count() <= (uint)(index + currentColumns) || (neighbour = listToSearch.at( index + currentColumns )) == 0)
{
if (wrap == WLAYOUT_VERTICAL || wrap == WLAYOUT_BOTH )
return listToSearch.at( index%currentColumns );
kdDebug() << "KomposeLayout::getNeighbour() - No valid neighbour available" << endl;
return NULL;
}
return neighbour;
}
}
++index;
++it;
}
kdDebug() << "KomposeLayout::getNeighbour() - this should never happen!" << endl;
return NULL;
}
#include "komposelayout.moc"
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