tdegraphics/kolourpaint/kpmainwindow_edit.cpp

/*
   Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   1. Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <kpmainwindow.h>

#include <tqapplication.h>
#include <tqclipboard.h>
#include <tqdatetime.h>
#include <tqfontmetrics.h>
#include <tqimage.h>
#include <tqpixmap.h>
#include <tqvaluevector.h>

#include <kaction.h>
#include <kdebug.h>
#include <klocale.h>
#include <kmessagebox.h>
#include <kstdaction.h>

#include <kpcommandhistory.h>
#include <kpdocument.h>
#include <kpdocumentmetainfo.h>
#include <kpdocumentsaveoptions.h>
#include <kppixmapfx.h>
#include <kpselection.h>
#include <kpselectiondrag.h>
#include <kpselectiontransparency.h>
#include <kptool.h>
#include <kptoolcrop.h>
#include <kptoolresizescale.h>
#include <kptoolselection.h>
#include <kptooltext.h>
#include <kpviewmanager.h>
#include <kpviewscrollablecontainer.h>
#include <kpzoomedview.h>


// private
kpPixmapFX::WarnAboutLossInfo kpMainWindow::pasteWarnAboutLossInfo ()
{
    return kpPixmapFX::WarnAboutLossInfo (
               i18n ("The image to be pasted"
                     " may have more colors than the current screen mode."
                     " In order to display it, some colors may be changed."
                     " Try increasing your screen depth to at least %1bpp."

                     "\nIt also"

                     " contains translucency which is not fully"
                     " supported. The translucency data will be"
                     " approximated with a 1-bit transparency mask."),
               i18n ("The image to be pasted"
                     " may have more colors than the current screen mode."
                     " In order to display it, some colors may be changed."
                     " Try increasing your screen depth to at least %1bpp."),
               i18n ("The image to be pasted"
                     " contains translucency which is not fully"
                     " supported. The translucency data will be"
                     " approximated with a 1-bit transparency mask."),
               "paste",
               this);
}


// private
void kpMainWindow::setupEditMenuActions ()
{
    KActionCollection *ac = actionCollection ();


    // Undo/Redo
    // CONFIG: need GUI
    m_commandHistory = new kpCommandHistory (true/*read config*/, this);

    if (m_configFirstTime)
    {
        // (so that cfg-file-editing user can modify in the meantime)
        m_commandHistory->writeConfig ();
    }


    m_actionCut = KStdAction::cut (TQT_TQOBJECT(this), TQT_SLOT (slotCut ()), ac);
    m_actionCopy = KStdAction::copy (TQT_TQOBJECT(this), TQT_SLOT (slotCopy ()), ac);
    m_actionPaste = KStdAction::paste (TQT_TQOBJECT(this), TQT_SLOT (slotPaste ()), ac);
    m_actionPasteInNewWindow = new KAction (i18n ("Paste in &New Window"),
        TQt::CTRL + TQt::SHIFT + TQt::Key_V,
        TQT_TQOBJECT(this), TQT_SLOT (slotPasteInNewWindow ()), ac, "edit_paste_in_new_window");

    //m_actionDelete = KStdAction::clear (this, TQT_SLOT (slotDelete ()), ac);
    m_actionDelete = new KAction (i18n ("&Delete Selection"), 0,
        TQT_TQOBJECT(this), TQT_SLOT (slotDelete ()), ac, "edit_clear");

    m_actionSelectAll = KStdAction::selectAll (TQT_TQOBJECT(this), TQT_SLOT (slotSelectAll ()), ac);
    m_actionDeselect = KStdAction::deselect (TQT_TQOBJECT(this), TQT_SLOT (slotDeselect ()), ac);


    m_actionCopyToFile = new KAction (i18n ("C&opy to File..."), 0,
        TQT_TQOBJECT(this), TQT_SLOT (slotCopyToFile ()), ac, "edit_copy_to_file");
    m_actionPasteFromFile = new KAction (i18n ("Paste &From File..."), 0,
        TQT_TQOBJECT(this), TQT_SLOT (slotPasteFromFile ()), ac, "edit_paste_from_file");


    m_editMenuDocumentActionsEnabled = false;
    enableEditMenuDocumentActions (false);

    // Paste should always be enabled, as long as there is something paste
    // (independent of whether we have a document or not)
    connect (TQApplication::tqclipboard (), TQT_SIGNAL (dataChanged ()),
             TQT_TQOBJECT(this), TQT_SLOT (slotEnablePaste ()));
    slotEnablePaste ();
}

// private
void kpMainWindow::enableEditMenuDocumentActions (bool enable)
{
    // m_actionCut
    // m_actionCopy
    // m_actionPaste
    // m_actionPasteInNewWindow

    // m_actionDelete

    m_actionSelectAll->setEnabled (enable);
    // m_actionDeselect

    m_editMenuDocumentActionsEnabled = enable;

    // m_actionCopyToFile
    // Unlike m_actionPaste, we disable this if there is no document.
    // This is because "File / Open" would do the same thing, if there is
    // no document.
    m_actionPasteFromFile->setEnabled (enable);
}


// public
TQPopupMenu *kpMainWindow::selectionToolRMBMenu ()
{
    return (TQPopupMenu *) guiFactory ()->container ("selectionToolRMBMenu", this);
}


// private slot
void kpMainWindow::slotCut ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotCut() CALLED" << endl;
#endif

    if (!m_document || !m_document->selection ())
    {
        kdError () << "kpMainWindow::slotCut () doc=" << m_document
                   << " sel=" << (m_document ? m_document->selection () : 0)
                   << endl;
        return;
    }


    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();

    slotCopy ();
    slotDelete ();

    TQApplication::restoreOverrideCursor ();

}

// private slot
void kpMainWindow::slotCopy ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotCopy() CALLED" << endl;
#endif

    if (!m_document || !m_document->selection ())
    {
        kdError () << "kpMainWindow::slotCopy () doc=" << m_document
                   << " sel=" << (m_document ? m_document->selection () : 0)
                   << endl;
        return;
    }


    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();

    kpSelection sel = *m_document->selection ();
    // Transparency doesn't get sent across the aether so nuke it now
    // so that transparency mask doesn't get needlessly recalculated
    // if we ever call sel.setPixmap().
    sel.setTransparency (kpSelectionTransparency ());

    if (sel.isText ())
    {
        if (!sel.text ().isEmpty ())
        {
            TQApplication::tqclipboard ()->setData (new TQTextDrag (sel.text ()),
                                                 TQClipboard::Clipboard);

            // SYNC: Normally, users highlight text and press CTRL+C.
            //       Highlighting text copies it to the X11 "middle
            //       mouse button" clipboard.  CTRL+C copies it to the
            //       separate, Windows-like "CTRL+V" clipboard.
            //
            //       However, KolourPaint doesn't support highlighting.
            //       So when they press CTRL+C to copy all text, simulate
            //       the highlighting by copying the text to the "middle
            //       mouse button" clipboard.  We don't do this for images
            //       as no one ever middle-mouse-pastes images.
            //
            //       Note that we don't share the TQTextDrag pointer with
            //       the above in case TQt doesn't expect it.
            //
            //       Once we change KolourPaint to support highlighted text
            //       and CTRL+C to copy only the highlighted text, delete
            //       this code.
            TQApplication::tqclipboard ()->setData (new TQTextDrag (sel.text ()),
                                                 TQClipboard::Selection);
        }
    }
    else
    {
        TQPixmap rawPixmap;

        if (sel.pixmap ())
            rawPixmap = *sel.pixmap ();
        else
            rawPixmap = m_document->getSelectedPixmap ();
        
        // Some apps, such as OpenOffice.org 2.0.4, ignore the image mask
        // when pasting.  For transparent pixels, the uninitialized RGB
        // values are used.  Fix this by initializing those values to a
        // neutral color -- white.
        //
        // Strangely enough, OpenOffice.org respects the mask when inserting
        // an image from a file, as opposed to pasting one from the clipboard.
        sel.setPixmap (
            kpPixmapFX::pixmapWithDefinedTransparentPixels (
                rawPixmap,
                TQt::white));  // CONFIG
        
        TQApplication::tqclipboard ()->setData (new kpSelectionDrag (sel),
                                             TQClipboard::Clipboard);
    }

    TQApplication::restoreOverrideCursor ();
}


static bool HasSomethingToPaste (kpMainWindow *mw)
{
#if DEBUG_KP_MAIN_WINDOW
    kdDebug () << "kpMainWindow(" << mw->name () << "):HasSomethingToPaste()" << endl;
    TQTime timer;
    timer.start ();
#else
    (void) mw;
#endif

    bool hasSomething = false;

    TQMimeSource *ms = TQApplication::tqclipboard ()->data (TQClipboard::Clipboard);
    if (ms)
    {
        // It's faster to test for TQTextDrag::canDecode() first due to the
        // lazy evaluation of the '||' operator.
        hasSomething = (TQTextDrag::canDecode (ms) ||
                        kpSelectionDrag::canDecode (ms));
    #if DEBUG_KP_MAIN_WINDOW
        kdDebug () << "\t" << mw->name () << "***canDecode=" << timer.restart () << endl;
        for (int i = 0; ; i++)
        {
            const char *fmt = ms->format (i);
            if (!fmt)
                break;

            kdDebug () << "\t'" << fmt << "'" << endl;
        }
    #endif
    }

    return hasSomething;
}

// HACK: SYNC: Non-TQt apps do not cause TQApplication::tqtqclipboard() to
//             emit dataChanged().  We don't want to have our paste
//             action disabled when we can actually paste something.
//
//             So we make sure the paste action is always enabled and
//             before any paste, we check if there's actually something
//             to paste (HasSomethingToPasteWithDialogIfNot ()).

#if 1  // Hack code path


// Call before any paste only.
static bool HasSomethingToPasteWithDialogIfNot (kpMainWindow *mw)
{
    if (::HasSomethingToPaste (mw))
        return true;

    // STRING: Unfortunately, we are in a string freeze.
#if 1
    (void) mw;
#else
    TQApplication::setOverrideCursor (TQt::arrowCursor);

    KMessageBox::sorry (mw,
        STRING_FREEZE_i18n ("<qt><p>There is nothing in the clipboard to paste.</p></qt>"),
        STRING_FREEZE_i18n ("Cannot Paste"));

    TQApplication::restoreOverrideCursor ();
#endif

    return false;
}

// private slot
void kpMainWindow::slotEnablePaste ()
{
    const bool shouldEnable = true;
    m_actionPasteInNewWindow->setEnabled (shouldEnable);
    m_actionPaste->setEnabled (shouldEnable);
}


#else  // No hack


// Call before any paste only.
static bool HasSomethingToPasteWithDialogIfNot (kpMainWindow *)
{
    // We will not be called if there's nothing to paste, as the paste
    // action would have been disabled.  But do _not_ assert that
    // (see the slotPaste() "data unexpectedly disappeared" KMessageBox).
    return true;
}

// private slot
void kpMainWindow::slotEnablePaste ()
{
    const bool shouldEnable = ::HasSomethingToPaste (this);
    m_actionPasteInNewWindow->setEnabled (shouldEnable);
    m_actionPaste->setEnabled (shouldEnable);
}
 
 
#endif


// private
TQRect kpMainWindow::calcUsefulPasteRect (int pixmapWidth, int pixmapHeight)
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::calcUsefulPasteRect("
               << pixmapWidth << "," << pixmapHeight
               << ")"
               << endl;
#endif
    if (!m_document)
    {
        kdError () << "kpMainWindow::calcUsefulPasteRect() without doc" << endl;
        return TQRect ();
    }

    // TODO: 1st choice is to paste sel near but not overlapping last deselect point

    if (m_mainView && m_scrollView)
    {
        const TQPoint viewTopLeft (m_scrollView->contentsX (),
                                  m_scrollView->contentsY ());

        const TQPoint docTopLeft = m_mainView->transformViewToDoc (viewTopLeft);

        if ((docTopLeft.x () + pixmapWidth <= m_document->width () &&
             docTopLeft.y () + pixmapHeight <= m_document->height ()) ||
            pixmapWidth <= docTopLeft.x () ||
            pixmapHeight <= docTopLeft.y ())
        {
            return TQRect (docTopLeft.x (), docTopLeft.y (),
                          pixmapWidth, pixmapHeight);
        }
    }

    return TQRect (0, 0, pixmapWidth, pixmapHeight);
}

// private
void kpMainWindow::paste (const kpSelection &sel, bool forceTopLeft)
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::paste(forceTopLeft=" << forceTopLeft << ")"
               << endl;
#endif

    if (!sel.pixmap ())
    {
        kdError () << "kpMainWindow::paste() with sel without pixmap" << endl;
        return;
    }

    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    //
    // Make sure we've got a document (esp. with File/Close)
    //

    if (!m_document)
    {
        kpDocument *newDoc = new kpDocument (
            sel.width (), sel.height (), this);

        // will also create viewManager
        setDocument (newDoc);
    }


    //
    // Paste as new selection
    //

    kpSelection selInUsefulPos = sel;
    if (!forceTopLeft)
        selInUsefulPos.moveTo (calcUsefulPasteRect (sel.width (), sel.height ()).topLeft ());
    addDeselectFirstCommand (new kpToolSelectionCreateCommand (
        selInUsefulPos.isText () ?
            i18n ("Text: Create Box") :
            i18n ("Selection: Create"),
        selInUsefulPos,
        this));


#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "sel.size=" << TQSize (sel.width (), sel.height ())
               << " document.size="
               << TQSize (m_document->width (), m_document->height ())
               << endl;
#endif

    // If the selection is bigger than the document, automatically
    // resize the document (with the option of Undo'ing) to fit
    // the selection.
    //
    // No annoying dialog necessary.
    //
    if (sel.width () > m_document->width () ||
        sel.height () > m_document->height ())
    {
        m_commandHistory->addCommand (
            new kpToolResizeScaleCommand (
                false/*act on doc, not sel*/,
                TQMAX (sel.width (), m_document->width ()),
                TQMAX (sel.height (), m_document->height ()),
                kpToolResizeScaleCommand::Resize,
                this));
    }


    TQApplication::restoreOverrideCursor ();
}

// public
void kpMainWindow::pasteText (const TQString &text,
                              bool forceNewTextSelection,
                              const TQPoint &newTextSelectionTopLeft)
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::pasteText(" << text
               << ",forceNewTextSelection=" << forceNewTextSelection
               << ",newTextSelectionTopLeft=" << newTextSelectionTopLeft
               << ")" << endl;
#endif

    if (text.isEmpty ())
        return;


    // sync: restoreOverrideCursor() in all exit paths
    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    TQValueVector <TQString> textLines (1, TQString());

    for (int i = 0; i < (int) text.length (); i++)
    {
        if (text [i] == '\n')
            textLines.push_back (TQString());
        else
            textLines [textLines.size () - 1].append (text [i]);
    }


    if (!forceNewTextSelection &&
        m_document && m_document->selection () &&
        m_document->selection ()->isText () &&
        m_commandHistory && m_viewManager)
    {
    #if DEBUG_KP_MAIN_WINDOW && 1
        kdDebug () << "\treusing existing Text Selection" << endl;
    #endif

        kpMacroCommand *macroCmd = new kpMacroCommand (i18n ("Text: Paste"),
            this);

        for (int i = 0; i < (int) textLines.size (); i++)
        {
            if (i > 0)
            {
                macroCmd->addCommand (
                    new kpToolTextEnterCommand (
                        TQString()/*uninteresting child of macroCmd*/,
                        m_viewManager->textCursorRow (),
                        m_viewManager->textCursorCol (),
                        this));
            }

            macroCmd->addCommand (
                new kpToolTextInsertCommand (
                    TQString()/*uninteresting child of macroCmd*/,
                    m_viewManager->textCursorRow (),
                    m_viewManager->textCursorCol (),
                    textLines [i],
                    this));
        }

        m_commandHistory->addCommand (macroCmd, false/*no exec*/);
    }
    else
    {
    #if DEBUG_KP_MAIN_WINDOW && 1
        kdDebug () << "\tcreating Text Selection" << endl;
    #endif

        const kpTextStyle ts = textStyle ();
        const TQFontMetrics fontMetrics = ts.fontMetrics ();

        int height = textLines.size () * fontMetrics.height ();
        if (textLines.size () >= 1)
            height += (textLines.size () - 1) * fontMetrics.leading ();

        int width = 0;
        for (TQValueVector <TQString>::const_iterator it = textLines.begin ();
             it != textLines.end ();
             it++)
        {
            const int w = fontMetrics.width (*it);
            if (w > width)
                width = w;
        }


        const int selWidth = TQMAX (kpSelection::minimumWidthForTextStyle (ts),
                                   width + kpSelection::textBorderSize () * 2);
        const int selHeight = TQMAX (kpSelection::minimumHeightForTextStyle (ts),
                                    height + kpSelection::textBorderSize () * 2);
        kpSelection sel (TQRect (0, 0, selWidth, selHeight),
                         textLines,
                         ts);

        if (newTextSelectionTopLeft != KP_INVALID_POINT)
        {
            sel.moveTo (newTextSelectionTopLeft);
            paste (sel, true/*force topLeft*/);
        }
        else
        {
            paste (sel);
        }
    }


    TQApplication::restoreOverrideCursor ();
}

// public
void kpMainWindow::pasteTextAt (const TQString &text, const TQPoint &point,
                                bool allowNewTextSelectionPointShift)
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::pasteTextAt(" << text
               << ",point=" << point
               << ",allowNewTextSelectionPointShift="
               << allowNewTextSelectionPointShift
               << ")" << endl;
#endif

    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    if (m_document &&
        m_document->selection () &&
        m_document->selection ()->isText () &&
        m_document->selection ()->pointIsInTextArea (point))
    {
        kpSelection *sel = m_document->selection ();

        const int row = sel->textRowForPoint (point);
        const int col = sel->textColForPoint (point);

        m_viewManager->setTextCursorPosition (row, col);

        pasteText (text);
    }
    else
    {
        TQPoint pointToUse = point;

        if (allowNewTextSelectionPointShift)
        {
            // TODO: In terms of doc pixels, would be inconsistent behaviour
            //       based on zoomLevel of view.
            // pointToUse -= TQPoint (-view->selectionResizeHandleAtomicSize (),
            //                       -view->selectionResizeHandleAtomicSize ());
        }

        pasteText (text, true/*force new text selection*/, pointToUse);
    }

    TQApplication::restoreOverrideCursor ();
}

// public slot
void kpMainWindow::slotPaste ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotPaste() CALLED" << endl;
#endif

    // sync: restoreOverrideCursor() in all exit paths
    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    if (!::HasSomethingToPasteWithDialogIfNot (this))
    {
        TQApplication::restoreOverrideCursor ();
        return;
    }


    //
    // Acquire the pixmap
    //

    TQMimeSource *ms = TQApplication::tqclipboard ()->data (TQClipboard::Clipboard);
    if (!ms)
    {
        kdError () << "kpMainWindow::slotPaste() without mimeSource" << endl;
        TQApplication::restoreOverrideCursor ();
        return;
    }

    kpSelection sel;
    TQString text;
    if (kpSelectionDrag::decode (ms, sel/*ref*/, pasteWarnAboutLossInfo ()))
    {
        sel.setTransparency (selectionTransparency ());
        paste (sel);
    }
    else if (TQTextDrag::decode (ms, text/*ref*/))
    {
        pasteText (text);
    }
    else
    {
        TQApplication::restoreOverrideCursor ();

        kdDebug () << "kpMainWindow::slotPaste() could not decode selection" << endl;
        kdDebug () << "\tFormats supported:" << endl;
        for (int i = 0; ms->format (i); i++)
        {
            kdDebug () << "\t\t" << i << ":" << ms->format (i) << endl;
        }

        // TODO: fix Klipper
        KMessageBox::sorry (this,
            i18n ("<qt><p>KolourPaint cannot paste the contents of"
                  " the clipboard as the data unexpectedly disappeared.</p>"

                  "<p>This usually occurs if the application which was"
                  " responsible"
                  " for the clipboard contents has been closed.</p></qt>"),
            i18n ("Cannot Paste"));

        // TODO: PROPAGATE: interprocess
        if (KMainWindow::memberList)
        {
        #if DEBUG_KP_MAIN_WINDOW
            kdDebug () << "\thave memberList" << endl;
        #endif

            for (TQPtrList <KMainWindow>::const_iterator it = KMainWindow::memberList->begin ();
                 it != KMainWindow::memberList->end ();
                 it++)
            {
                kpMainWindow *mw = dynamic_cast <kpMainWindow *> (*it);

                if (!mw)
                {
                    kdError () << "kpMainWindow::slotPaste() given fake kpMainWindow: " << (*it) << endl;
                    continue;
                }
            #if DEBUG_KP_MAIN_WINDOW
                kdDebug () << "\t\tmw=" << mw << endl;
            #endif

                mw->slotEnablePaste ();
            }
        }

        return;
    }

    TQApplication::restoreOverrideCursor ();
}

// private slot
void kpMainWindow::slotPasteInNewWindow ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotPasteInNewWindow() CALLED" << endl;
#endif

    // sync: restoreOverrideCursor() in all exit paths
    TQApplication::setOverrideCursor (TQt::waitCursor);

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    if (!::HasSomethingToPasteWithDialogIfNot (this))
    {
        TQApplication::restoreOverrideCursor ();
        return;
    }


    //
    // Pasting must ensure that:
    //
    // Requirement 1. the document is the same size as the image to be pasted.
    // Requirement 2. transparent pixels in the image must remain as transparent.
    //

    kpMainWindow *win = new kpMainWindow (0/*no document*/);
    win->show ();

    // Make "Edit / Paste in New Window" always paste white pixels as white.
    // Don't let selection transparency get in the way and paste them as
    // transparent.
    kpSelectionTransparency transparency = win->selectionTransparency ();
    if (transparency.isTransparent ())
    {
    #if DEBUG_KP_MAIN_WINDOW && 1
        kdDebug () << "\tchanging selection transparency to opaque" << endl;
    #endif
        transparency.setOpaque ();
        // Since we are setting selection transparency programmatically
        // -- as opposed to in response to user input -- this will not
        // affect the selection transparency tool option widget's "last used"
        // config setting.
        win->setSelectionTransparency (transparency);
    }

    // (this handles Requirement 1. above)
    win->slotPaste ();

    // (this handles Requirement 2. above;
    //  slotDeselect() is not enough unless the document is filled with the
    //  transparent color in advance)
    win->slotCrop ();


    TQApplication::restoreOverrideCursor ();
}

// public slot
void kpMainWindow::slotDelete ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotDelete() CALLED" << endl;
#endif
    if (!m_actionDelete->isEnabled ())
    {
    #if DEBUG_KP_MAIN_WINDOW && 1
        kdDebug () << "\taction not enabled - was probably called from kpTool::keyPressEvent()" << endl;
    #endif
        return;
    }

    if (!m_document || !m_document->selection ())
    {
        kdError () << "kpMainWindow::slotDelete () doc=" << m_document
                   << " sel=" << (m_document ? m_document->selection () : 0)
                   << endl;
        return;
    }

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();

    addImageOrSelectionCommand (new kpToolSelectionDestroyCommand (
        m_document->selection ()->isText () ?
            i18n ("Text: Delete Box") :  // not to be confused with i18n ("Text: Delete")
            i18n ("Selection: Delete"),
        false/*no push onto doc*/,
        this));
}


// private slot
void kpMainWindow::slotSelectAll ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotSelectAll() CALLED" << endl;
#endif
    if (!m_document)
    {
        kdError () << "kpMainWindow::slotSelectAll() without doc" << endl;
        return;
    }

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();

    if (m_document->selection ())
        slotDeselect ();

    // just the border - don't actually pull pixmap from doc yet
    m_document->setSelection (kpSelection (kpSelection::Rectangle, m_document->rect (), selectionTransparency ()));

    if (tool ())
        tool ()->somethingBelowTheCursorChanged ();
}


// private
void kpMainWindow::addDeselectFirstCommand (kpCommand *cmd)
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::addDeselectFirstCommand("
               << cmd
               << ")"
               << endl;
#endif


    kpSelection *sel = m_document->selection ();

#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "\tsel=" << sel << endl;
#endif

    if (sel)
    {
        // if you just dragged out something with no action then
        // forget the drag
        if (!sel->pixmap ())
        {
        #if DEBUG_KP_MAIN_WINDOW && 1
            kdDebug () << "\tjust a fresh border - was nop - delete" << endl;
        #endif
            m_document->selectionDelete ();
            if (tool ())
                tool ()->somethingBelowTheCursorChanged ();

            if (cmd)
                m_commandHistory->addCommand (cmd);
        }
        else
        {
        #if DEBUG_KP_MAIN_WINDOW && 1
            kdDebug () << "\treal selection with pixmap - push onto doc cmd" << endl;
        #endif
            kpCommand *deselectCommand = new kpToolSelectionDestroyCommand (
                sel->isText () ?
                    i18n ("Text: Finish") :
                    i18n ("Selection: Deselect"),
                true/*push onto document*/,
                this);

            if (cmd)
            {
                kpMacroCommand *macroCmd = new kpMacroCommand (cmd->name (), this);
                macroCmd->addCommand (deselectCommand);
                macroCmd->addCommand (cmd);
                m_commandHistory->addCommand (macroCmd);
            }
            else
                m_commandHistory->addCommand (deselectCommand);
        }
    }
    else
    {
        if (cmd)
            m_commandHistory->addCommand (cmd);
    }
}


// public slot
void kpMainWindow::slotDeselect ()
{
#if DEBUG_KP_MAIN_WINDOW && 1
    kdDebug () << "kpMainWindow::slotDeselect() CALLED" << endl;
#endif
    if (!m_document || !m_document->selection ())
    {
        kdError () << "kpMainWindow::slotDeselect() doc=" << m_document
                   << " sel=" << (m_document ? m_document->selection () : 0)
                   << endl;
        return;
    }

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();

    addDeselectFirstCommand (0);
}


// private slot
void kpMainWindow::slotCopyToFile ()
{
#if DEBUG_KP_MAIN_WINDOW
    kdDebug () << "kpMainWindow::slotCopyToFile()" << endl;
#endif

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    if (!m_document->selection ())
        return;

    kpSelection sel = *m_document->selection ();

    TQPixmap pixmapToSave;

    if (!sel.pixmap ())
    {
        // Not a floating selection - user has just selected a region;
        // haven't pulled it off yet so probably don't expect and can't
        // visualise selection transparency so give opaque, not transparent
        // pixmap.
        pixmapToSave = m_document->getSelectedPixmap ();
    }
    else
        pixmapToSave = sel.transparentPixmap ();


    kpDocumentSaveOptions chosenSaveOptions;
    bool allowOverwritePrompt, allowLossyPrompt;
    KURL chosenURL = askForSaveURL (i18n ("Copy to File"),
                                    m_lastCopyToURL.url (),
                                    pixmapToSave,
                                    m_lastCopyToSaveOptions,
                                    kpDocumentMetaInfo (),
                                    kpSettingsGroupEditCopyTo,
                                    false/*allow remote files*/,
                                    &chosenSaveOptions,
                                    m_copyToFirstTime,
                                    &allowOverwritePrompt,
                                    &allowLossyPrompt);

    if (chosenURL.isEmpty ())
        return;


    if (!kpDocument::savePixmapToFile (pixmapToSave,
                                       chosenURL,
                                       chosenSaveOptions, kpDocumentMetaInfo (),
                                       allowOverwritePrompt,
                                       allowLossyPrompt,
                                       this))
    {
        return;
    }


    addRecentURL (chosenURL);


    m_lastCopyToURL = chosenURL;
    m_lastCopyToSaveOptions = chosenSaveOptions;

    m_copyToFirstTime = false;
}

// private slot
void kpMainWindow::slotPasteFromFile ()
{
#if DEBUG_KP_MAIN_WINDOW
    kdDebug () << "kpMainWindow::slotPasteFromFile()" << endl;
#endif

    if (toolHasBegunShape ())
        tool ()->endShapeInternal ();


    KURL::List urls = askForOpenURLs (i18n ("Paste From File"),
                                      m_lastPasteFromURL.url (),
                                      false/*only 1 URL*/);

    if (urls.count () != 1)
        return;

    KURL url = urls.first ();
    m_lastPasteFromURL = url;


    TQPixmap pixmap = kpDocument::getPixmapFromFile (url,
        false/*show error message if doesn't exist*/,
        this);


    if (pixmap.isNull ())
        return;


    addRecentURL (url);

    paste (kpSelection (kpSelection::Rectangle,
                        TQRect (0, 0, pixmap.width (), pixmap.height ()),
                        pixmap,
                        selectionTransparency ()));
}