Rename 'digikam' folder to 'src'

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit ee0d99607c14cb63d3ebdb3a970b508949fa8219)

1 files changed, 1421 insertions, 0 deletions

diff --git a/src/utilities/imageeditor/canvas/canvas.cpp b/src/utilities/imageeditor/canvas/canvas.cpp
new file mode 100644
index 00000000..89758c3d
--- /dev/null
+++ b/src/utilities/imageeditor/canvas/canvas.cpp
@@ -0,0 +1,1421 @@
+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2003-01-09
+ * Description : image editor canvas management class
+ *
+ * Copyright (C) 2004-2005 by Renchi Raju <renchi@pooh.tam.uiuc.edu>
+ * Copyright (C) 2004-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * 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, 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.
+ *
+ * ============================================================ */
+
+// C++ includes.
+
+#include <cstdio>
+#include <cmath>
+
+// TQt includes.
+
+#include <tqtooltip.h>
+#include <tqfile.h>
+#include <tqstring.h>
+#include <tqevent.h>
+#include <tqpoint.h>
+#include <tqpainter.h>
+#include <tqpen.h>
+#include <tqpixmap.h>
+#include <tqstyle.h>
+#include <tqapplication.h>
+#include <tqcursor.h>
+#include <tqimage.h>
+#include <tqregion.h>
+#include <tqtimer.h>
+#include <tqcache.h>
+#include <tqcolor.h>
+#include <tqdragobject.h> 
+#include <tqclipboard.h>
+#include <tqtoolbutton.h>
+
+// KDE includes.
+
+#include <kcursor.h>
+#include <tdelocale.h>
+#include <kiconloader.h>
+#include <kdatetbl.h>
+#include <tdeglobalsettings.h>
+
+// Local includes.
+
+#include "ddebug.h"
+#include "imagehistogram.h"
+#include "imagepaniconwidget.h"
+#include "dimginterface.h"
+#include "iccsettingscontainer.h"
+#include "exposurecontainer.h"
+#include "iofilesettingscontainer.h"
+#include "loadingcacheinterface.h"
+#include "canvas.h"
+#include "canvas.moc"
+
+namespace Digikam
+{
+
+class CanvasPrivate
+{
+
+public:
+
+    CanvasPrivate() : 
+        tileSize(128), minZoom(0.1), maxZoom(12.0), zoomMultiplier(1.2) 
+    {
+        rubber           = 0;
+        pressedMoved     = false;
+        pressedMoving    = false;
+        ltActive         = false;
+        rtActive         = false;
+        lbActive         = false;
+        rbActive         = false;
+        midButtonPressed = false;
+        midButtonX       = 0;
+        midButtonY       = 0;
+        panIconPopup     = 0;
+        panIconWidget    = 0;
+        cornerButton     = 0;
+        parent           = 0;
+        im               = 0;
+        rubber           = 0;
+        autoZoom         = false;
+        fullScreen       = false;
+        zoom             = 1.0;
+        tileTmpPix       = new TQPixmap(tileSize, tileSize);
+
+        tileCache.setMaxCost((10*1024*1024)/(tileSize*tileSize*4));
+        tileCache.setAutoDelete(true);
+    }
+
+    bool                 autoZoom;
+    bool                 fullScreen;
+    bool                 pressedMoved;
+    bool                 pressedMoving;
+    bool                 ltActive;
+    bool                 rtActive;
+    bool                 lbActive;
+    bool                 rbActive;
+    bool                 midButtonPressed;
+
+    const int            tileSize;
+    int                  midButtonX;
+    int                  midButtonY;
+
+    double               zoom;
+    const double         minZoom;
+    const double         maxZoom;
+    const double         zoomMultiplier;
+
+    TQToolButton         *cornerButton;
+
+    TQRect               *rubber;
+    TQRect                pixmapRect;
+
+    TQCache<TQPixmap>      tileCache;
+
+    TQPixmap*             tileTmpPix;
+    TQPixmap              qcheck;
+
+    TQColor               bgColor;
+
+    TQWidget             *parent;
+
+    TDEPopupFrame         *panIconPopup;
+
+    DImgInterface       *im;
+
+    ImagePanIconWidget  *panIconWidget;
+};
+
+Canvas::Canvas(TQWidget *parent)
+      : TQScrollView(parent)
+{
+    d = new CanvasPrivate;
+    d->im     = new DImgInterface();
+    d->parent = parent;
+    d->bgColor.setRgb(0, 0, 0);
+
+    d->qcheck.resize(16, 16);
+    TQPainter p(&d->qcheck);
+    p.fillRect(0, 0, 8, 8, TQColor(144, 144, 144));
+    p.fillRect(8, 8, 8, 8, TQColor(144, 144, 144));
+    p.fillRect(0, 8, 8, 8, TQColor(100, 100, 100));
+    p.fillRect(8, 0, 8, 8, TQColor(100, 100, 100));
+    p.end();
+
+    d->cornerButton = new TQToolButton(this);
+    d->cornerButton->setIconSet(SmallIcon("move"));
+    d->cornerButton->hide();
+    TQToolTip::add(d->cornerButton, i18n("Pan the image to a region"));
+    setCornerWidget(d->cornerButton);
+
+    viewport()->setBackgroundMode(TQt::NoBackground);
+    viewport()->setMouseTracking(false);
+    setFrameStyle( TQFrame::NoFrame );
+
+    // ------------------------------------------------------------
+
+    connect(this, TQ_SIGNAL(signalZoomChanged(double)),
+            this, TQ_SLOT(slotZoomChanged(double)));
+
+    connect(d->cornerButton, TQ_SIGNAL(pressed()),
+            this, TQ_SLOT(slotCornerButtonPressed()));
+
+    connect(d->im, TQ_SIGNAL(signalModified()),
+            this, TQ_SLOT(slotModified()));
+
+    connect(d->im, TQ_SIGNAL(signalUndoStateChanged(bool, bool, bool)),
+            this, TQ_SIGNAL(signalUndoStateChanged(bool, bool, bool)));
+
+    connect(d->im, TQ_SIGNAL(signalLoadingStarted(const TQString&)),
+            this, TQ_SIGNAL(signalLoadingStarted(const TQString&)));
+
+    connect(d->im, TQ_SIGNAL(signalImageLoaded(const TQString&, bool)),
+            this, TQ_SLOT(slotImageLoaded(const TQString&, bool)));
+
+    connect(d->im, TQ_SIGNAL(signalImageSaved(const TQString&, bool)),
+            this, TQ_SLOT(slotImageSaved(const TQString&, bool)));
+
+    connect(d->im, TQ_SIGNAL(signalLoadingProgress(const TQString&, float)),
+            this, TQ_SIGNAL(signalLoadingProgress(const TQString&, float)));
+
+    connect(d->im, TQ_SIGNAL(signalSavingProgress(const TQString&, float)),
+            this, TQ_SIGNAL(signalSavingProgress(const TQString&, float)));
+
+    connect(this, TQ_SIGNAL(signalSelected(bool)),
+            this, TQ_SLOT(slotSelected()));
+}
+
+Canvas::~Canvas()
+{
+    delete d->tileTmpPix;
+    delete d->im;
+
+    if (d->rubber)
+        delete d->rubber;
+
+    delete d;
+}
+
+void Canvas::resetImage()
+{
+    reset();
+    viewport()->setUpdatesEnabled(false);
+    d->im->resetImage();
+}
+
+void Canvas::reset()
+{
+    if (d->rubber)
+    {
+        delete d->rubber;
+        d->rubber = 0;
+        if (d->im->imageValid())
+            emit signalSelected(false);
+    }
+
+    d->tileCache.clear();
+}
+
+void Canvas::load(const TQString& filename, IOFileSettingsContainer *IOFileSettings)
+{
+    reset();
+
+    viewport()->setUpdatesEnabled(false);
+
+    d->im->load( filename, IOFileSettings, d->parent );
+
+    emit signalPrepareToLoad();
+}
+
+void Canvas::slotImageLoaded(const TQString& filePath, bool success)
+{
+    d->zoom = 1.0;
+    d->im->zoom(d->zoom);
+
+    if (d->autoZoom)
+        updateAutoZoom();
+
+    updateContentsSize(true);
+
+    viewport()->setUpdatesEnabled(true);
+    viewport()->update();
+
+    emit signalZoomChanged(d->zoom);
+
+    emit signalLoadingFinished(filePath, success);
+}
+
+void Canvas::preload(const TQString& /*filename*/)
+{
+//    d->im->preload(filename);
+}
+
+/*
+These code part are unused and untested
+void Canvas::save(const TQString& filename, IOFileSettingsContainer *IOFileSettings)
+{
+    d->im->save(filename, IOFileSettings);
+    emit signalSavingStarted(filename);
+}
+
+void Canvas::saveAs(const TQString& filename,IOFileSettingsContainer *IOFileSettings,
+                    const TQString& mimeType)
+{
+    d->im->saveAs(filename, IOFileSettings, mimeType);
+    emit signalSavingStarted(filename);
+}
+*/
+
+void Canvas::saveAs(const TQString& filename, IOFileSettingsContainer *IOFileSettings,
+                    bool setExifOrientationTag, const TQString& mimeType)
+{
+    d->im->saveAs(filename, IOFileSettings, setExifOrientationTag, mimeType);
+    emit signalSavingStarted(filename);
+}
+
+void Canvas::slotImageSaved(const TQString& filePath, bool success)
+{
+    emit signalSavingFinished(filePath, success);
+}
+
+void Canvas::switchToLastSaved(const TQString& newFilename)
+{
+    d->im->switchToLastSaved(newFilename);
+}
+
+void Canvas::abortSaving()
+{
+    d->im->abortSaving();
+}
+
+void Canvas::setModified()
+{
+    d->im->setModified();
+}
+
+void Canvas::readMetadataFromFile(const TQString &file)
+{
+    d->im->readMetadataFromFile(file);
+}
+
+void Canvas::clearUndoHistory()
+{
+    d->im->clearUndoManager();
+}
+
+void Canvas::setUndoHistoryOrigin()
+{
+    d->im->setUndoManagerOrigin();
+}
+
+void Canvas::updateUndoState()
+{
+    d->im->updateUndoState();
+}
+
+DImg Canvas::currentImage()
+{
+    return DImg(*d->im->getImg());
+}
+
+TQString Canvas::currentImageFileFormat()
+{
+    return d->im->getImageFormat();
+}
+
+TQString Canvas::currentImageFilePath()
+{
+    return d->im->getImageFilePath();
+}
+
+int Canvas::imageWidth()
+{
+    return d->im->origWidth();  
+}
+
+int Canvas::imageHeight()
+{
+    return d->im->origHeight();
+}
+
+bool Canvas::isReadOnly()
+{
+    return d->im->isReadOnly();
+}
+
+TQRect Canvas::getSelectedArea()
+{
+    int x, y, w, h;
+    d->im->getSelectedArea(x, y, w, h);
+    return ( TQRect(x, y, w, h) );
+}
+
+DImgInterface *Canvas::interface() const
+{
+    return d->im;
+}
+
+void Canvas::makeDefaultEditingCanvas()
+{
+    DImgInterface::setDefaultInterface(d->im);
+}
+
+double Canvas::calcAutoZoomFactor()
+{
+    if (!d->im->imageValid()) return d->zoom;
+
+    double srcWidth  = d->im->origWidth();
+    double srcHeight = d->im->origHeight();
+    double dstWidth  = contentsRect().width();
+    double dstHeight = contentsRect().height();
+    return TQMIN(dstWidth/srcWidth, dstHeight/srcHeight);
+}
+
+void Canvas::updateAutoZoom()
+{
+    d->zoom = calcAutoZoomFactor();
+    d->im->zoom(d->zoom);
+    emit signalZoomChanged(d->zoom);
+}
+
+void Canvas::updateContentsSize(bool deleteRubber)
+{
+    viewport()->setUpdatesEnabled(false);
+
+    if (deleteRubber && d->rubber)
+    {
+        delete d->rubber;
+        d->rubber       = 0;
+        d->ltActive     = false;
+        d->rtActive     = false;
+        d->lbActive     = false;
+        d->rbActive     = false;
+        d->pressedMoved = false;
+        viewport()->unsetCursor();
+        viewport()->setMouseTracking(false);
+        if (d->im->imageValid())
+            emit signalSelected(false);
+    }
+    
+    int wZ = d->im->width();
+    int hZ = d->im->height();
+    
+    if (visibleWidth() > wZ || visibleHeight() > hZ)
+    {
+        // Center the image
+        int centerx = contentsRect().width()/2;
+        int centery = contentsRect().height()/2;
+        int xoffset = int(centerx - wZ/2);
+        int yoffset = int(centery - hZ/2);
+        xoffset     = TQMAX(xoffset, 0);
+        yoffset     = TQMAX(yoffset, 0);
+
+        d->pixmapRect = TQRect(xoffset, yoffset, wZ, hZ);
+    }
+    else
+    {
+        d->pixmapRect = TQRect(0, 0, wZ, hZ);
+    }
+
+    if (!deleteRubber && d->rubber)
+    {
+        int xSel, ySel, wSel, hSel;
+        d->im->getSelectedArea(xSel, ySel, wSel, hSel);
+        xSel = (int)((xSel * d->tileSize) / floor(d->tileSize / d->zoom));
+        ySel = (int)((ySel * d->tileSize) / floor(d->tileSize / d->zoom));
+        wSel = (int)((wSel * d->tileSize) / floor(d->tileSize / d->zoom));
+        hSel = (int)((hSel * d->tileSize) / floor(d->tileSize / d->zoom));
+        d->rubber->setX(xSel);
+        d->rubber->setY(ySel);
+        d->rubber->setWidth(wSel);
+        d->rubber->setHeight(hSel);
+        d->rubber->moveBy(d->pixmapRect.x(), d->pixmapRect.y());
+    }
+    
+    d->tileCache.clear();    
+    resizeContents(wZ, hZ);
+    viewport()->setUpdatesEnabled(true);
+}
+
+void Canvas::resizeEvent(TQResizeEvent* e)
+{
+    if (!e)
+        return;
+
+    TQScrollView::resizeEvent(e);
+
+    if (d->autoZoom)
+        updateAutoZoom();
+
+    updateContentsSize(false);
+
+    // No need to repaint. its called   
+    // automatically after resize
+
+    // To be sure than corner widget used to pan image will be hide/show 
+    // accordinly with resize event.
+    slotZoomChanged(d->zoom);
+}
+
+void Canvas::viewportPaintEvent(TQPaintEvent *e)
+{
+    TQRect er(e->rect());
+    er = TQRect(TQMAX(er.x() - 1, 0),
+               TQMAX(er.y() - 1, 0),
+               TQMIN(er.width()  + 2, contentsRect().width()),
+               TQMIN(er.height() + 2, contentsRect().height()));
+    
+    paintViewport(er, (d->zoom <= 1.0) ? true : false);
+}
+
+void Canvas::paintViewport(const TQRect& er, bool antialias)
+{
+    TQRect o_cr(viewportToContents(er.topLeft()), viewportToContents(er.bottomRight()));
+    TQRect cr = o_cr;
+
+    TQRegion clipRegion(er);
+    cr = d->pixmapRect.intersect(cr);
+
+    if (!cr.isEmpty() && d->im->imageValid())
+    {
+        clipRegion -= TQRect(contentsToViewport(cr.topLeft()), cr.size());
+
+        TQRect pr = TQRect(cr.x() - d->pixmapRect.x(), cr.y() - d->pixmapRect.y(),
+                         cr.width(), cr.height());
+
+        int x1 = (int)floor((double)pr.x()      / (double)d->tileSize) * d->tileSize;
+        int y1 = (int)floor((double)pr.y()      / (double)d->tileSize) * d->tileSize;
+        int x2 = (int)ceilf((double)pr.right()  / (double)d->tileSize) * d->tileSize;
+        int y2 = (int)ceilf((double)pr.bottom() / (double)d->tileSize) * d->tileSize;
+
+        TQPixmap pix(d->tileSize, d->tileSize);
+        int sx, sy, sw, sh;
+        int step = (int)floor(d->tileSize / d->zoom);
+
+        bool hasRubber = (d->rubber && d->pressedMoved && d->pressedMoving && d->rubber->intersects(pr));
+        if (hasRubber)
+        {
+            // remove rubber
+            drawRubber();
+        }
+
+        for (int j = y1 ; j < y2 ; j += d->tileSize)
+        {
+            for (int i = x1 ; i < x2 ; i += d->tileSize)
+            {
+                TQString key  = TQString("%1,%2").arg(i).arg(j);
+                TQPixmap *pix = d->tileCache.find(key);
+
+                if (!pix)
+                {
+                    if (antialias)
+                    {
+                        pix = new TQPixmap(d->tileSize, d->tileSize);
+                        d->tileCache.insert(key, pix);
+                    }
+                    else
+                    {
+                        pix = d->tileTmpPix;
+                    }
+
+                    if (d->im->hasAlpha())
+                    {
+                        TQPainter p(pix);
+                        p.drawTiledPixmap(0, 0, d->tileSize, d->tileSize,
+                                          d->qcheck, 0, 0);
+                        p.end();
+                    }
+                    else
+                    {
+                        pix->fill(d->bgColor);
+                    }
+
+                    // NOTE : with implementations <= 0.9.1, the canvas doesn't work properly using high zoom level (> 500).
+                    // The sx, sy, sw, sh values haven't be computed properly and "tile" artefacts been appears 
+                    // over the image. Look the example here:
+                    // http://digikam3rdparty.free.fr/Screenshots/editorhighzoomartefact.png
+                    // Note than these "tile" artifacts are not the real tiles of canvas.
+                    // The new implementation below fix this problem to handle properly the areas to 
+                    // use from the source image to generate the canvas pixmap tiles.  
+
+                    sx = (int)floor((double)i / d->tileSize) * step;
+                    sy = (int)floor((double)j / d->tileSize) * step;
+                    sw = step;
+                    sh = step;
+
+                    if (d->rubber && d->pressedMoved && !d->pressedMoving)
+                    {
+                        TQRect rr(d->rubber->normalize());
+                        TQRect  r(i, j, d->tileSize, d->tileSize);
+
+                        d->im->paintOnDevice(pix, sx, sy, sw, sh,
+                                             0, 0, d->tileSize, d->tileSize,
+                                             rr.x() - i - d->pixmapRect.x(),
+                                             rr.y() - j - d->pixmapRect.y(),
+                                             rr.width(), rr.height(),
+                                             antialias);
+
+                        rr.moveBy(-i -d->pixmapRect.x(), -j -d->pixmapRect.y());
+ 
+                        TQPainter p(pix);
+                        p.setPen(TQPen(TQColor(250, 250, 255), 1));
+                        p.drawRect(rr);
+                        if (rr.width() >= 10 && rr.height() >= 10)
+                        {
+                            p.drawRect(rr.x(),              rr.y(),               5, 5);
+                            p.drawRect(rr.x(),              rr.y()+rr.height()-5, 5, 5);
+                            p.drawRect(rr.x()+rr.width()-5, rr.y()+rr.height()-5, 5, 5);
+                            p.drawRect(rr.x()+rr.width()-5, rr.y(),               5, 5);
+                        }
+                        p.end();
+                    }
+                    else
+                    {
+                        d->im->paintOnDevice(pix, sx, sy, sw, sh,
+                                             0, 0, d->tileSize, d->tileSize,
+                                             antialias);
+                    }
+                }
+
+                TQRect  r(i, j, d->tileSize, d->tileSize);
+                TQRect  ir = pr.intersect(r);
+                TQPoint pt(contentsToViewport(TQPoint(ir.x() + d->pixmapRect.x(),
+                                                    ir.y() + d->pixmapRect.y())));
+
+                bitBlt(viewport(), pt.x(), pt.y(),
+                       pix,
+                       ir.x()-r.x(), ir.y()-r.y(),
+                       ir.width(), ir.height());
+            }
+        }
+
+        if (hasRubber)
+        {
+            // restore rubber
+            drawRubber();
+        }
+    }
+
+    TQPainter painter(viewport());
+    painter.setClipRegion(clipRegion);
+    painter.fillRect(er, d->bgColor);
+    painter.end();
+}
+
+void Canvas::drawRubber()
+{
+    if (!d->rubber || !d->im->imageValid())
+        return;
+
+    TQPainter p(viewport());
+    p.setRasterOp(TQt::NotROP );
+    p.setPen(TQPen(TQt::color0, 1));
+    p.setBrush(NoBrush);
+
+    TQRect r(d->rubber->normalize());
+    r = TQRect(contentsToViewport(TQPoint(r.x(), r.y())), r.size());
+
+    TQPoint pnt(r.x(), r.y());
+
+    style().drawPrimitive(TQStyle::PE_FocusRect, &p,
+                          TQRect(pnt.x(), pnt.y(), r.width(), r.height()),
+                          colorGroup(), TQStyle::Style_Default,
+                          TQStyleOption(colorGroup().base()));
+    p.end();
+}
+
+void Canvas::contentsMousePressEvent(TQMouseEvent *e)
+{
+    if (!e || e->button() == TQt::RightButton)
+        return;
+
+    d->midButtonPressed = false;
+
+    if (e->button() == TQt::LeftButton)
+    {
+        if (d->ltActive || d->rtActive ||
+            d->lbActive || d->rbActive)
+        {
+            Q_ASSERT( d->rubber );
+            if (!d->rubber)
+                return;
+
+            // Set diagonally opposite corner as anchor
+        
+            TQRect r(d->rubber->normalize());
+
+            if (d->ltActive)
+            {
+                d->rubber->setTopLeft(r.bottomRight());
+                d->rubber->setBottomRight(r.topLeft());
+            }
+            else if (d->rtActive)
+            {
+                d->rubber->setTopLeft(r.bottomLeft());
+                d->rubber->setBottomRight(r.topRight());
+            }
+            else if (d->lbActive)
+            {
+                d->rubber->setTopLeft(r.topRight());
+                d->rubber->setBottomRight(r.bottomLeft());
+            }
+            else if (d->rbActive)
+            {
+                d->rubber->setTopLeft(r.topLeft());
+                d->rubber->setBottomRight(r.bottomLeft());
+            }
+        
+            viewport()->setMouseTracking(false);
+            d->pressedMoved  = false;
+            d->pressedMoving = true;
+
+            d->tileCache.clear();
+            viewport()->repaint(false);
+
+            return;
+        }
+    }
+    else if (e->button() == TQt::MidButton)
+    {
+        if (visibleWidth()  < d->im->width() ||
+            visibleHeight() < d->im->height())
+        {
+            viewport()->setCursor(TQt::SizeAllCursor);
+            d->midButtonPressed = true;
+            d->midButtonX       = e->x();
+            d->midButtonY       = e->y();
+        }
+        return;
+    }
+    
+    if (d->rubber)
+    {
+        delete d->rubber;
+        d->rubber = 0;        
+    }
+
+    d->rubber = new TQRect(e->x(), e->y(), 0, 0);
+
+    if (d->pressedMoved)
+    {
+        d->tileCache.clear();
+        viewport()->update();
+    }
+    
+    d->pressedMoved  = false;
+    d->pressedMoving = true;
+
+    viewport()->setMouseTracking(false);
+}
+
+void Canvas::contentsMouseMoveEvent(TQMouseEvent *e)
+{
+    if (!e)
+        return;
+
+    if (e->state() & TQt::MidButton)
+    {
+        if (d->midButtonPressed)
+        {
+            scrollBy(d->midButtonX - e->x(),
+                     d->midButtonY - e->y());
+        }
+    }
+    else if (!viewport()->hasMouseTracking())
+    {
+        if (!d->rubber)
+            return;
+        
+        if (e->state() != TQt::LeftButton &&
+            !(d->ltActive || d->rtActive ||
+              d->lbActive || d->rbActive))
+            return;
+
+        // Clear old rubber.
+        if (d->pressedMoved)
+            drawRubber();
+
+        // Move content if necessary.
+        blockSignals(true);
+        setUpdatesEnabled(false);
+        ensureVisible(e->x(), e->y(), 10, 10);
+        setUpdatesEnabled(true);
+        blockSignals(false);
+
+        // draw the new rubber position.
+        int r, b;
+        r = (e->x() > d->pixmapRect.left()) ? e->x() : d->pixmapRect.left();
+        r = (r < d->pixmapRect.right())     ? r      : d->pixmapRect.right();
+        b = (e->y() > d->pixmapRect.top())  ? e->y() : d->pixmapRect.top();
+        b = (b < d->pixmapRect.bottom())    ? b      : d->pixmapRect.bottom();
+        d->rubber->setRight(r);
+        d->rubber->setBottom(b);
+        drawRubber();
+
+        d->pressedMoved  = true;
+        d->pressedMoving = true;
+
+        // To refresh editor status bar with current selection.
+        emit signalSelectionChanged(calcSeletedArea());
+    }
+    else
+    {
+        if (!d->rubber)
+            return;
+        
+        TQRect r(d->rubber->normalize());
+        
+        TQRect lt(r.x()-5,           r.y()-5,            10, 10);
+        TQRect rt(r.x()+r.width()-5, r.y()-5,            10, 10);
+        TQRect lb(r.x()-5,           r.y()+r.height()-5, 10, 10);
+        TQRect rb(r.x()+r.width()-5, r.y()+r.height()-5, 10, 10);
+
+        d->ltActive = false;
+        d->rtActive = false;
+        d->lbActive = false;
+        d->rbActive = false;
+        
+        if (lt.contains(e->x(), e->y()))
+        {
+            viewport()->setCursor(TQt::SizeFDiagCursor);
+            d->ltActive = true;
+        }
+        else if (rb.contains(e->x(), e->y()))
+        {
+            viewport()->setCursor(TQt::SizeFDiagCursor);
+            d->rbActive = true;
+        }
+        else if (lb.contains(e->x(), e->y()))
+        {
+            viewport()->setCursor(TQt::SizeBDiagCursor);
+            d->lbActive = true;
+        }
+        else if (rt.contains(e->x(), e->y()))
+        {
+            viewport()->setCursor(TQt::SizeBDiagCursor);
+            d->rtActive = true;
+        }
+        else
+            viewport()->unsetCursor();
+    }
+}
+    
+void Canvas::contentsMouseReleaseEvent(TQMouseEvent *e)
+{
+    if (!e)
+        return;
+
+    d->midButtonPressed = false;
+    
+    if (d->pressedMoving)
+    {
+        d->pressedMoving = false;
+        viewport()->update();
+    }
+
+    if (d->pressedMoved && d->rubber)
+    {
+        // Normalize rubber rectangle to always have the selection into the image 
+        TQRect rec = d->rubber->normalize();        
+
+        if (rec.left()   < d->pixmapRect.left())   rec.setLeft(d->pixmapRect.left()); 
+        if (rec.right()  > d->pixmapRect.right())  rec.setRight(d->pixmapRect.right()); 
+        if (rec.top()    < d->pixmapRect.top())    rec.setTop(d->pixmapRect.top()); 
+        if (rec.bottom() > d->pixmapRect.bottom()) rec.setBottom(d->pixmapRect.bottom()); 
+
+        d->rubber->setLeft(rec.left());
+        d->rubber->setRight(rec.right());
+        d->rubber->setTop(rec.top());
+        d->rubber->setBottom(rec.bottom());
+
+        d->tileCache.clear();
+        viewport()->setMouseTracking(true);
+        if (d->im->imageValid())
+            emit signalSelected(true);
+    }
+    else
+    {
+        d->ltActive = false;
+        d->rtActive = false;
+        d->lbActive = false;
+        d->rbActive = false;
+        viewport()->setMouseTracking(false);
+        viewport()->unsetCursor();
+        if (d->im->imageValid())
+            emit signalSelected(false);
+    }
+
+    if (e->button() != TQt::LeftButton)
+    {
+        viewport()->unsetCursor();
+    }
+
+    if (e->button() == TQt::RightButton)
+    {
+        emit signalRightButtonClicked();
+    }
+}
+
+void Canvas::contentsWheelEvent(TQWheelEvent *e)
+{
+    e->accept();
+
+    if (e->state() & TQt::ShiftButton)
+    {
+        if (e->delta() < 0)
+            emit signalShowNextImage();
+        else if (e->delta() > 0)
+            emit signalShowPrevImage();
+        return;
+    }
+    else if (e->state() & TQt::ControlButton)
+    {
+        if (e->delta() < 0)
+            slotDecreaseZoom();
+        else if (e->delta() > 0)
+            slotIncreaseZoom();
+        return;
+    }
+
+    TQScrollView::contentsWheelEvent(e);
+}
+
+bool Canvas::maxZoom()
+{
+    return ((d->zoom * d->zoomMultiplier) >= d->maxZoom);
+}
+
+bool Canvas::minZoom()
+{
+    return ((d->zoom / d->zoomMultiplier) <= d->minZoom);
+}
+
+bool Canvas::exifRotated()
+{
+    return d->im->exifRotated();
+}
+
+double Canvas::snapZoom(double zoom)
+{
+    // If the zoom value gets changed from d->zoom to zoom
+    // across 50%, 100% or fit-to-window, then return the
+    // the corresponding special value. Otherwise zoom is returned unchanged.
+    double fit = calcAutoZoomFactor();
+    TQValueList<double> snapValues;
+    snapValues.append(0.5);
+    snapValues.append(1.0);
+    snapValues.append(fit);
+
+    qHeapSort(snapValues);
+    TQValueList<double>::const_iterator it;
+
+    if (d->zoom < zoom) 
+    {
+        for(it = snapValues.constBegin(); it != snapValues.constEnd(); ++it)
+        {
+            double z = *it;
+            if ((d->zoom < z) && (zoom > z))
+            {
+                 zoom = z;
+                 break;
+            }
+        }
+    }
+    else
+    {
+        // We need to go through the list in reverse order,
+        // however, tqCopyBackward does not seem to work here, so 
+        // a simple for loop over integers is used instead.
+        for(int i=snapValues.size()-1; i>=0; i--) 
+        {
+            double z = snapValues[i];
+            if ((d->zoom > z) && (zoom < z))
+            {
+                 zoom = z;
+                 break;
+            }
+        }
+    }
+
+    return zoom;
+}
+
+void Canvas::slotIncreaseZoom()
+{
+    if (maxZoom())
+        return;
+
+    double zoom = d->zoom * d->zoomMultiplier;
+    zoom        = snapZoom(zoom);
+    setZoomFactor(zoom);
+}
+
+void Canvas::slotDecreaseZoom()
+{
+    if (minZoom())
+        return;
+
+    double zoom = d->zoom / d->zoomMultiplier;
+    zoom        = snapZoom(zoom);
+    setZoomFactor(zoom);
+}
+
+void Canvas::setZoomFactorSnapped(double zoom)
+{
+    double fit = calcAutoZoomFactor();
+
+    if (fabs(zoom-fit) < 0.05)
+    {
+        // If 1.0 or 0.5 are even closer to zoom than fit, then choose these.
+        if  (fabs(zoom-fit) > fabs(zoom-1.0) )
+        {
+            zoom = 1.0;
+        }
+        else if  (fabs(zoom-fit) > fabs(zoom-0.5) )
+        {
+            zoom = 0.5;
+        }
+        else
+        {
+            zoom = fit;
+        }
+    }
+    else
+    {
+        if (fabs(zoom-1.0) < 0.05)
+        {
+            zoom = 1.0;
+        }
+        if (fabs(zoom-0.5) < 0.05)
+        {
+            zoom = 0.5;
+        }
+    }
+    setZoomFactor(zoom);
+}
+
+double Canvas::zoomFactor()
+{
+    return d->zoom;
+}
+
+void Canvas::setZoomFactor(double zoom)
+{
+    if (d->autoZoom)
+    {
+        d->autoZoom = false;
+        emit signalToggleOffFitToWindow();
+    }
+
+    // Zoom using center of canvas and given zoom factor.
+
+    double cpx = contentsX() + visibleWidth()  / 2.0; 
+    double cpy = contentsY() + visibleHeight() / 2.0;
+
+    cpx = (cpx / d->tileSize) * floor(d->tileSize / d->zoom);
+    cpy = (cpy / d->tileSize) * floor(d->tileSize / d->zoom);
+
+    d->zoom = zoom;
+
+    d->im->zoom(d->zoom);
+    updateContentsSize(false);
+
+    viewport()->setUpdatesEnabled(false);
+    center((int)((cpx * d->tileSize) / floor(d->tileSize / d->zoom)), 
+           (int)((cpy * d->tileSize) / floor(d->tileSize / d->zoom)));
+    viewport()->setUpdatesEnabled(true);
+    viewport()->update();
+
+    emit signalZoomChanged(d->zoom);
+}
+
+void Canvas::fitToSelect()
+{
+    int xSel, ySel, wSel, hSel;
+    d->im->getSelectedArea(xSel, ySel, wSel, hSel);
+    
+    if (wSel && hSel )   
+    {   
+        // If selected area, use center of selection
+        // and recompute zoom factor accordinly.
+        double cpx = xSel + wSel / 2.0; 
+        double cpy = ySel + hSel / 2.0;
+
+        double srcWidth  = wSel;
+        double srcHeight = hSel;
+        double dstWidth  = contentsRect().width();
+        double dstHeight = contentsRect().height();
+    
+        d->zoom = TQMIN(dstWidth/srcWidth, dstHeight/srcHeight);
+
+        d->autoZoom = false;
+        emit signalToggleOffFitToWindow();
+        d->im->zoom(d->zoom);
+        updateContentsSize(true);
+    
+        viewport()->setUpdatesEnabled(false);
+        center((int)((cpx * d->tileSize) / floor(d->tileSize / d->zoom)), 
+               (int)((cpy * d->tileSize) / floor(d->tileSize / d->zoom)));
+        viewport()->setUpdatesEnabled(true);
+        viewport()->update();
+    
+        emit signalZoomChanged(d->zoom);
+    }
+}
+
+bool Canvas::fitToWindow()
+{
+    return d->autoZoom;
+}
+
+void Canvas::toggleFitToWindow()
+{
+    d->autoZoom = !d->autoZoom;
+
+    if (d->autoZoom)
+        updateAutoZoom();
+    else
+    {
+        d->zoom = 1.0;
+        emit signalZoomChanged(d->zoom);
+    }
+
+    d->im->zoom(d->zoom);
+    updateContentsSize(false);
+    slotZoomChanged(d->zoom);
+    viewport()->update();
+}
+
+void Canvas::slotRotate90()
+{
+    d->im->rotate90();
+}
+
+void Canvas::slotRotate180()
+{
+    d->im->rotate180();
+}
+
+void Canvas::slotRotate270()
+{
+    d->im->rotate270();
+}
+
+void Canvas::slotFlipHoriz()
+{
+    d->im->flipHoriz();
+}
+
+void Canvas::slotFlipVert()
+{
+    d->im->flipVert();
+}
+
+void Canvas::slotCrop()
+{
+    int x, y, w, h;
+    d->im->getSelectedArea(x, y, w, h);
+
+    if (!w && !h )  // No current selection.
+        return;
+
+    d->im->crop(x, y, w, h);
+}
+
+void Canvas::resizeImage(int w, int h)
+{
+    d->im->resize(w, h);
+}
+
+void Canvas::setBackgroundColor(const TQColor& color)
+{
+    if (d->bgColor == color)
+        return;
+    
+    d->bgColor = color;
+    viewport()->update();
+}
+
+void Canvas::setICCSettings(ICCSettingsContainer *cmSettings)
+{
+    d->im->setICCSettings(cmSettings);
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::setExposureSettings(ExposureSettingsContainer *expoSettings)
+{
+    d->im->setExposureSettings(expoSettings);
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::setExifOrient(bool exifOrient)
+{
+    d->im->setExifOrient(exifOrient);
+    viewport()->update();
+}
+
+void Canvas::increaseGamma()
+{
+    d->im->changeGamma(1);    
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::decreaseGamma()
+{
+    d->im->changeGamma(-1);    
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::increaseBrightness()
+{
+    d->im->changeBrightness(1);    
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::decreaseBrightness()
+{
+    d->im->changeBrightness(-1);    
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::increaseContrast()
+{
+    d->im->changeContrast(5);    
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::decreaseContrast()
+{
+    d->im->changeContrast(-5);    
+    d->tileCache.clear();    
+    viewport()->update();
+}
+
+void Canvas::slotRestore()
+{
+    d->im->restore();
+}
+
+void Canvas::slotUndo(int steps)
+{
+    while(steps > 0)
+    {
+        d->im->undo();
+        --steps;
+    }
+}
+
+void Canvas::getUndoHistory(TQStringList &titles)
+{
+    d->im->getUndoHistory(titles);
+}
+
+void Canvas::getRedoHistory(TQStringList &titles)
+{
+    d->im->getRedoHistory(titles);
+}
+
+void Canvas::slotRedo(int steps)
+{
+    while(steps > 0)
+    {
+        d->im->redo();
+        --steps;
+    }
+}
+
+void Canvas::slotCopy()
+{
+    int x, y, w, h;
+    d->im->getSelectedArea(x, y, w, h);
+
+    if (!w && !h )  // No current selection.
+        return;
+
+    TQApplication::setOverrideCursor (TQt::waitCursor);
+    uchar* data = d->im->getImageSelection();
+    DImg selDImg = DImg(w, h, d->im->sixteenBit(), d->im->hasAlpha(), data);
+    delete [] data;
+
+    TQImage selImg = selDImg.copyTQImage();
+    TQApplication::clipboard()->setData(new TQImageDrag(selImg), TQClipboard::Clipboard);
+    TQApplication::restoreOverrideCursor ();
+}
+
+void Canvas::slotSelected()
+{
+    int x=0, y=0, w=0, h=0;
+    
+    if (d->rubber && d->pressedMoved) 
+    {
+        TQRect sel = calcSeletedArea();
+        x = sel.x();
+        y = sel.y();
+        w = sel.width();
+        h = sel.height();
+    }
+
+    d->im->setSelectedArea(x, y, w, h);
+}
+
+TQRect Canvas::calcSeletedArea()
+{
+    int x=0, y=0, w=0, h=0;
+    TQRect r(d->rubber->normalize());
+    
+    if (r.isValid()) 
+    {
+        r.moveBy(- d->pixmapRect.x(), - d->pixmapRect.y());
+
+        x = (int)(((double)r.x()      / d->tileSize) * floor(d->tileSize / d->zoom));
+        y = (int)(((double)r.y()      / d->tileSize) * floor(d->tileSize / d->zoom));
+        w = (int)(((double)r.width()  / d->tileSize) * floor(d->tileSize / d->zoom));   
+        h = (int)(((double)r.height() / d->tileSize) * floor(d->tileSize / d->zoom));
+
+        x = TQMIN(imageWidth(),  TQMAX(x, 0));   
+        y = TQMIN(imageHeight(), TQMAX(y, 0));
+        w = TQMIN(imageWidth(),  TQMAX(w, 0));
+        h = TQMIN(imageHeight(), TQMAX(h, 0));
+
+        // Avoid empty selection by rubberband - at least mark one pixel
+        // At high zoom factors, the rubberband may operate at subpixel level!
+        if (w == 0)
+            w = 1;
+        if (h == 0)
+            h = 1;
+    }
+    
+    return TQRect(x, y, w, h); 
+}
+
+void Canvas::slotModified()
+{
+    if (d->autoZoom)
+        updateAutoZoom();
+    d->im->zoom(d->zoom);
+
+    updateContentsSize(true);
+    viewport()->update();
+
+    // To be sure than corner widget used to pan image will be hide/show 
+    // accordinly with new image size (if changed).
+    slotZoomChanged(d->zoom);
+
+    emit signalChanged();
+}
+
+void Canvas::slotCornerButtonPressed()
+{    
+    if (d->panIconPopup)
+    {
+        d->panIconPopup->hide();
+        delete d->panIconPopup;
+        d->panIconPopup = 0;
+    }
+
+    d->panIconPopup         = new TDEPopupFrame(this);
+    ImagePanIconWidget *pan = new ImagePanIconWidget(180, 120, d->panIconPopup);
+    d->panIconPopup->setMainWidget(pan);
+
+    TQRect r((int)(contentsX()    / d->zoom), (int)(contentsY()     / d->zoom),
+            (int)(visibleWidth() / d->zoom), (int)(visibleHeight() / d->zoom));
+    pan->setRegionSelection(r);
+    pan->setMouseFocus();
+
+    connect(pan, TQ_SIGNAL(signalSelectionMoved(const TQRect&, bool)),
+            this, TQ_SLOT(slotPanIconSelectionMoved(const TQRect&, bool)));
+    
+    connect(pan, TQ_SIGNAL(signalHiden()),
+            this, TQ_SLOT(slotPanIconHiden()));
+    
+    TQPoint g = mapToGlobal(viewport()->pos());
+    g.setX(g.x()+ viewport()->size().width());
+    g.setY(g.y()+ viewport()->size().height());
+    d->panIconPopup->popup(TQPoint(g.x() - d->panIconPopup->width(), 
+                                  g.y() - d->panIconPopup->height()));
+
+    pan->setCursorToLocalRegionSelectionCenter();
+}
+
+void Canvas::slotPanIconHiden()
+{
+    d->cornerButton->blockSignals(true);
+    d->cornerButton->animateClick();
+    d->cornerButton->blockSignals(false);
+}
+
+void Canvas::slotPanIconSelectionMoved(const TQRect& r, bool b)
+{
+    setContentsPos((int)(r.x()*d->zoom), (int)(r.y()*d->zoom));
+
+    if (b)
+    {
+        d->panIconPopup->hide();
+        delete d->panIconPopup;
+        d->panIconPopup = 0;
+        slotPanIconHiden();
+    }
+}
+
+void Canvas::slotZoomChanged(double /*zoom*/)
+{
+    updateScrollBars();
+
+    if (horizontalScrollBar()->isVisible() || verticalScrollBar()->isVisible())
+        d->cornerButton->show();
+    else
+        d->cornerButton->hide();        
+}
+
+void Canvas::slotSelectAll()
+{
+    if (d->rubber)
+    {
+        delete d->rubber;
+        d->rubber = 0;        
+    }
+
+    d->rubber       = new TQRect(d->pixmapRect);
+    d->pressedMoved = true;
+    d->tileCache.clear();
+    viewport()->setMouseTracking(true);
+    viewport()->update();
+
+    if (d->im->imageValid())
+        emit signalSelected(true);
+}
+
+void Canvas::slotSelectNone()
+{
+    reset();
+    viewport()->update();
+}
+
+}  // namespace Digikam