Added old abandoned KDE3 version of the RoseGarden MIDI tool

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 1591 insertions, 0 deletions

diff --git a/src/gui/editors/segment/segmentcanvas/CompositionView.cpp b/src/gui/editors/segment/segmentcanvas/CompositionView.cpp
new file mode 100644
index 0000000..8e83a6b
--- /dev/null
+++ b/src/gui/editors/segment/segmentcanvas/CompositionView.cpp
@@ -0,0 +1,1591 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+ 
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+ 
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+ 
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+ 
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+
+#include "CompositionView.h"
+
+#include "misc/Debug.h"
+#include "AudioPreviewThread.h"
+#include "base/RulerScale.h"
+#include "base/Segment.h"
+#include "base/Selection.h"
+#include "base/SnapGrid.h"
+#include "CompositionColourCache.h"
+#include "CompositionItemHelper.h"
+#include "CompositionItemImpl.h"
+#include "CompositionModel.h"
+#include "CompositionModelImpl.h"
+#include "CompositionRect.h"
+#include "AudioPreviewPainter.h"
+#include "document/RosegardenGUIDoc.h"
+#include "document/ConfigGroups.h"
+#include "gui/general/GUIPalette.h"
+#include "gui/general/RosegardenCanvasView.h"
+#include "gui/general/RosegardenScrollView.h"
+#include "SegmentSelector.h"
+#include "SegmentToolBox.h"
+#include "SegmentTool.h"
+#include <kmessagebox.h>
+#include <qbrush.h>
+#include <qcolor.h>
+#include <qevent.h>
+#include <qfont.h>
+#include <qfontmetrics.h>
+#include <qmemarray.h>
+#include <qpainter.h>
+#include <qpen.h>
+#include <qpixmap.h>
+#include <qpoint.h>
+#include <qrect.h>
+#include <qscrollbar.h>
+#include <qscrollview.h>
+#include <qsize.h>
+#include <qstring.h>
+#include <qwidget.h>
+#include <kapplication.h>
+#include <kconfig.h>
+#include <algorithm>
+
+
+namespace Rosegarden
+{
+
+class PreviewRect : public QRect {
+public:
+    PreviewRect(int left, int top, int width, int height) :
+        QRect(left, top, width, height) {};
+
+    PreviewRect(const QRect& r) :
+        QRect(r) {};
+
+    const QColor& getColor() const { return m_color; }
+    void setColor(QColor c) { m_color = c; }
+
+protected:
+    QColor m_color;
+};
+
+CompositionView::CompositionView(RosegardenGUIDoc* doc,
+                                 CompositionModel* model,
+                                 QWidget * parent, const char * name, WFlags f)
+#if KDE_VERSION >= KDE_MAKE_VERSION(3,2,0)
+        : RosegardenScrollView(parent, name, f | WNoAutoErase | WStaticContents),
+#else
+        :
+        RosegardenScrollView(parent, name, f | WRepaintNoErase | WResizeNoErase | WStaticContents),
+#endif
+        m_model(model),
+        m_currentItem(0),
+        m_tool(0),
+        m_toolBox(0),
+        m_showPreviews(false),
+        m_showSegmentLabels(true),
+        m_fineGrain(false),
+	m_pencilOverExisting(false),
+        m_minWidth(m_model->getLength()),
+        m_stepSize(0),
+        m_rectFill(0xF0, 0xF0, 0xF0),
+        m_selectedRectFill(0x00, 0x00, 0xF0),
+        m_pointerPos(0),
+        m_pointerColor(GUIPalette::getColour(GUIPalette::Pointer)),
+        m_pointerWidth(4),
+        m_pointerPen(QPen(m_pointerColor, m_pointerWidth)),
+        m_tmpRect(QRect(QPoint(0, 0), QPoint( -1, -1))),
+        m_tmpRectFill(CompositionRect::DefaultBrushColor),
+        m_trackDividerColor(GUIPalette::getColour(GUIPalette::TrackDivider)),
+        m_drawGuides(false),
+        m_guideColor(GUIPalette::getColour(GUIPalette::MovementGuide)),
+        m_topGuidePos(0),
+        m_foreGuidePos(0),
+        m_drawSelectionRect(false),
+        m_drawTextFloat(false),
+        m_segmentsDrawBuffer(visibleWidth(), visibleHeight()),
+        m_artifactsDrawBuffer(visibleWidth(), visibleHeight()),
+        m_segmentsDrawBufferRefresh(0, 0, visibleWidth(), visibleHeight()),
+        m_artifactsDrawBufferRefresh(0, 0, visibleWidth(), visibleHeight()),
+        m_lastBufferRefreshX(0),
+        m_lastBufferRefreshY(0),
+        m_lastPointerRefreshX(0),
+        m_contextHelpShown(false)
+{
+    if (doc) {
+        m_toolBox = new SegmentToolBox(this, doc);
+
+        connect(m_toolBox, SIGNAL(showContextHelp(const QString &)),
+                this, SLOT(slotToolHelpChanged(const QString &)));
+    }
+    
+    setDragAutoScroll(true);
+    setBackgroundMode(NoBackground);
+    viewport()->setBackgroundMode(NoBackground);
+    viewport()->setPaletteBackgroundColor(GUIPalette::getColour(GUIPalette::SegmentCanvas));
+
+    slotUpdateSize();
+
+    QScrollBar* hsb = horizontalScrollBar();
+
+    // dynamically adjust content size when scrolling past current composition's end
+    connect(hsb, SIGNAL(nextLine()),
+            this, SLOT(scrollRight()));
+    connect(hsb, SIGNAL(prevLine()),
+            this, SLOT(scrollLeft()));
+
+    //    connect(this, SIGNAL(contentsMoving(int, int)),
+    //            this, SLOT(slotAllDrawBuffersNeedRefresh()));
+
+    //     connect(this, SIGNAL(contentsMoving(int, int)),
+    //             this, SLOT(slotContentsMoving(int, int)));
+
+    connect(model, SIGNAL(needContentUpdate()),
+            this, SLOT(slotUpdateSegmentsDrawBuffer()));
+    connect(model, SIGNAL(needContentUpdate(const QRect&)),
+            this, SLOT(slotUpdateSegmentsDrawBuffer(const QRect&)));
+    connect(model, SIGNAL(needArtifactsUpdate()),
+            this, SLOT(slotArtifactsDrawBufferNeedsRefresh()));
+    connect(model, SIGNAL(needSizeUpdate()),
+            this, SLOT(slotUpdateSize()));
+
+    if (doc) {
+        connect(doc, SIGNAL(docColoursChanged()),
+                this, SLOT(slotRefreshColourCache()));
+
+        // recording-related signals
+        connect(doc, SIGNAL(newMIDIRecordingSegment(Segment*)),
+                this, SLOT(slotNewMIDIRecordingSegment(Segment*)));
+        connect(doc, SIGNAL(newAudioRecordingSegment(Segment*)),
+                this, SLOT(slotNewAudioRecordingSegment(Segment*)));
+        //     connect(doc, SIGNAL(recordMIDISegmentUpdated(Segment*, timeT)),
+        //             this, SLOT(slotRecordMIDISegmentUpdated(Segment*, timeT)));
+        connect(doc, SIGNAL(stoppedAudioRecording()),
+                this, SLOT(slotStoppedRecording()));
+        connect(doc, SIGNAL(stoppedMIDIRecording()),
+                this, SLOT(slotStoppedRecording()));
+        connect(doc, SIGNAL(audioFileFinalized(Segment*)),
+                getModel(), SLOT(slotAudioFileFinalized(Segment*)));
+    }
+    
+    CompositionModelImpl* cmi = dynamic_cast<CompositionModelImpl*>(model);
+    if (cmi) {
+        cmi->setAudioPreviewThread(&doc->getAudioPreviewThread());
+    }
+
+    if (doc) {
+        doc->getAudioPreviewThread().setEmptyQueueListener(this);
+    }
+    
+    m_segmentsDrawBuffer.setOptimization(QPixmap::BestOptim);
+    m_artifactsDrawBuffer.setOptimization(QPixmap::BestOptim);
+
+    viewport()->setMouseTracking(true);
+}
+
+void CompositionView::endAudioPreviewGeneration()
+{
+    CompositionModelImpl* cmi = dynamic_cast<CompositionModelImpl*>(m_model);
+    if (cmi) {
+        cmi->setAudioPreviewThread(0);
+    }
+}
+
+void CompositionView::setBackgroundPixmap(const QPixmap &m)
+{
+    m_backgroundPixmap = m;
+    //     viewport()->setErasePixmap(m_backgroundPixmap);
+}
+
+void CompositionView::initStepSize()
+{
+    QScrollBar* hsb = horizontalScrollBar();
+    m_stepSize = hsb->lineStep();
+}
+
+void CompositionView::slotUpdateSize()
+{
+    int vStep = getModel()->grid().getYSnap();
+    int height = std::max(getModel()->getNbRows() * vStep, (unsigned)visibleHeight());
+
+    RulerScale *ruler = grid().getRulerScale();
+
+    int minWidth = sizeHint().width();
+    int computedWidth = int(nearbyint(ruler->getTotalWidth()));
+
+    int width = std::max(computedWidth, minWidth);
+
+    resizeContents(width, height);
+}
+
+void CompositionView::scrollRight()
+{
+    RG_DEBUG << "CompositionView::scrollRight()\n";
+    if (m_stepSize == 0)
+        initStepSize();
+
+    if (horizontalScrollBar()->value() == horizontalScrollBar()->maxValue()) {
+
+        resizeContents(contentsWidth() + m_stepSize, contentsHeight());
+        setContentsPos(contentsX() + m_stepSize, contentsY());
+        getModel()->setLength(contentsWidth());
+    }
+
+}
+
+void CompositionView::scrollLeft()
+{
+    RG_DEBUG << "CompositionView::scrollLeft()\n";
+    if (m_stepSize == 0)
+        initStepSize();
+
+    int cWidth = contentsWidth();
+
+    if (horizontalScrollBar()->value() < cWidth && cWidth > m_minWidth) {
+        resizeContents(cWidth - m_stepSize, contentsHeight());
+        getModel()->setLength(contentsWidth());
+    }
+
+}
+
+void CompositionView::setSelectionRectPos(const QPoint& pos)
+{
+    m_selectionRect.setRect(pos.x(), pos.y(), 0, 0);
+    getModel()->setSelectionRect(m_selectionRect);
+}
+
+void CompositionView::setSelectionRectSize(int w, int h)
+{
+    m_selectionRect.setSize(QSize(w, h));
+    getModel()->setSelectionRect(m_selectionRect);
+}
+
+void CompositionView::setDrawSelectionRect(bool d)
+{
+    if (m_drawSelectionRect != d) {
+        m_drawSelectionRect = d;
+        slotArtifactsDrawBufferNeedsRefresh();
+        slotUpdateSegmentsDrawBuffer(m_selectionRect);
+    }
+}
+
+void CompositionView::clearSegmentRectsCache(bool clearPreviews)
+{
+    dynamic_cast<CompositionModelImpl*>(getModel())->clearSegmentRectsCache(clearPreviews);
+}
+
+SegmentSelection
+CompositionView::getSelectedSegments()
+{
+    return (dynamic_cast<CompositionModelImpl*>(m_model))->getSelectedSegments();
+}
+
+void CompositionView::updateSelectionContents()
+{
+    if (!haveSelection())
+        return ;
+
+
+    QRect selectionRect = getModel()->getSelectionContentsRect();
+    updateContents(selectionRect);
+}
+
+void CompositionView::slotContentsMoving(int x, int y)
+{
+    //     qDebug("contents moving : x=%d", x);
+}
+
+void CompositionView::slotSetTool(const QString& toolName)
+{
+    RG_DEBUG << "CompositionView::slotSetTool(" << toolName << ")"
+    << this << "\n";
+
+    if (m_tool)
+        m_tool->stow();
+
+    m_toolContextHelp = "";
+
+    m_tool = m_toolBox->getTool(toolName);
+
+    if (m_tool)
+        m_tool->ready();
+    else {
+        KMessageBox::error(0, QString("CompositionView::slotSetTool() : unknown tool name %1").arg(toolName));
+    }
+}
+
+void CompositionView::slotSelectSegments(const SegmentSelection &segments)
+{
+    RG_DEBUG << "CompositionView::slotSelectSegments\n";
+
+    static QRect dummy;
+
+    getModel()->clearSelected();
+
+    for (SegmentSelection::iterator i = segments.begin(); i != segments.end(); ++i) {
+        getModel()->setSelected(CompositionItem(new CompositionItemImpl(**i, dummy)));
+    }
+    slotUpdateSegmentsDrawBuffer();
+}
+
+SegmentSelector*
+CompositionView::getSegmentSelectorTool()
+{
+    return dynamic_cast<SegmentSelector*>(getToolBox()->getTool(SegmentSelector::ToolName));
+}
+
+void CompositionView::slotSetSelectAdd(bool value)
+{
+    SegmentSelector* selTool = getSegmentSelectorTool();
+
+    if (!selTool)
+        return ;
+
+    selTool->setSegmentAdd(value);
+}
+
+void CompositionView::slotSetSelectCopy(bool value)
+{
+    SegmentSelector* selTool = getSegmentSelectorTool();
+
+    if (!selTool)
+        return ;
+
+    selTool->setSegmentCopy(value);
+}
+
+void CompositionView::slotShowSplitLine(int x, int y)
+{
+    m_splitLinePos.setX(x);
+    m_splitLinePos.setY(y);
+}
+
+void CompositionView::slotHideSplitLine()
+{
+    m_splitLinePos.setX( -1);
+    m_splitLinePos.setY( -1);
+}
+
+void CompositionView::slotExternalWheelEvent(QWheelEvent* e)
+{
+    e->accept();
+    wheelEvent(e);
+}
+
+CompositionItem CompositionView::getFirstItemAt(QPoint pos)
+{
+    CompositionModel::itemcontainer items = getModel()->getItemsAt(pos);
+
+    if (items.size()) {
+        // find topmost item
+        CompositionItem res = *(items.begin());
+
+        unsigned int maxZ = res->z();
+
+        CompositionModel::itemcontainer::iterator maxZItemPos = items.begin();
+
+        for (CompositionModel::itemcontainer::iterator i = items.begin();
+                i != items.end(); ++i) {
+            CompositionItem ic = *i;
+            if (ic->z() > maxZ) {
+                RG_DEBUG << k_funcinfo << "found new topmost at z=" << ic->z() << endl;
+                res = ic;
+                maxZ = ic->z();
+                maxZItemPos = i;
+            }
+        }
+
+        // get rid of the rest;
+        items.erase(maxZItemPos);
+        for (CompositionModel::itemcontainer::iterator i = items.begin();
+                i != items.end(); ++i)
+            delete *i;
+
+        return res;
+    } else {
+        RG_DEBUG << k_funcinfo << "no item under cursor\n";
+    }
+
+
+    return CompositionItem();
+}
+
+void CompositionView::setSnapGrain(bool fine)
+{
+    if (m_fineGrain) {
+        grid().setSnapTime(SnapGrid::NoSnap);
+    } else {
+        grid().setSnapTime(fine ? SnapGrid::SnapToBeat : SnapGrid::SnapToBar);
+    }
+}
+
+void CompositionView::slotUpdateSegmentsDrawBuffer()
+{
+    //     RG_DEBUG << "CompositionView::slotUpdateSegmentsDrawBuffer()\n";
+    slotAllDrawBuffersNeedRefresh();
+    updateContents();
+}
+
+void CompositionView::slotUpdateSegmentsDrawBuffer(const QRect& rect)
+{
+    //     RG_DEBUG << "CompositionView::slotUpdateSegmentsDrawBuffer() rect "
+    //              << rect << " - valid : " << rect.isValid() << endl;
+
+    slotAllDrawBuffersNeedRefresh(rect);
+
+    if (rect.isValid()) {
+        updateContents(rect);
+    } else {
+        updateContents();
+    }
+}
+
+void CompositionView::slotRefreshColourCache()
+{
+    CompositionColourCache::getInstance()->init();
+    clearSegmentRectsCache();
+    slotUpdateSegmentsDrawBuffer();
+}
+
+void CompositionView::slotNewMIDIRecordingSegment(Segment* s)
+{
+    getModel()->addRecordingItem(CompositionItemHelper::makeCompositionItem(s));
+}
+
+void CompositionView::slotNewAudioRecordingSegment(Segment* s)
+{
+    getModel()->addRecordingItem(CompositionItemHelper::makeCompositionItem(s));
+}
+
+void CompositionView::slotStoppedRecording()
+{
+    getModel()->clearRecordingItems();
+}
+
+void CompositionView::resizeEvent(QResizeEvent* e)
+{
+    QScrollView::resizeEvent(e);
+    slotUpdateSize();
+
+    int w = std::max(m_segmentsDrawBuffer.width(), visibleWidth());
+    int h = std::max(m_segmentsDrawBuffer.height(), visibleHeight());
+
+    m_segmentsDrawBuffer.resize(w, h);
+    m_artifactsDrawBuffer.resize(w, h);
+    slotAllDrawBuffersNeedRefresh();
+    //     RG_DEBUG << "CompositionView::resizeEvent() : drawBuffer size = " << m_segmentsDrawBuffer.size() << endl;
+}
+
+void CompositionView::viewportPaintEvent(QPaintEvent* e)
+{
+    QMemArray<QRect> rects = e->region().rects();
+
+    for (unsigned int i = 0; i < rects.size(); ++i) {
+        viewportPaintRect(rects[i]);
+    }
+}
+
+void CompositionView::viewportPaintRect(QRect r)
+{
+    QRect updateRect = r;
+
+    r &= viewport()->rect();
+    r.moveBy(contentsX(), contentsY());
+
+    //     RG_DEBUG << "CompositionView::viewportPaintRect() r = " << r
+    //              << " - moveBy " << contentsX() << "," << contentsY() << " - updateRect = " << updateRect
+    //              << " - refresh " << m_segmentsDrawBufferRefresh << " artrefresh " << m_artifactsDrawBufferRefresh << endl;
+
+
+    bool scroll = false;
+    bool changed = checkScrollAndRefreshDrawBuffer(r, scroll);
+
+    if (changed || m_artifactsDrawBufferRefresh.isValid()) {
+
+        // r was modified by checkScrollAndRefreshDrawBuffer
+        QRect copyRect(r | m_artifactsDrawBufferRefresh);
+        copyRect.moveBy( -contentsX(), -contentsY());
+
+        //	RG_DEBUG << "copying from segment to artifacts buffer: " << copyRect << endl;
+
+        bitBlt(&m_artifactsDrawBuffer,
+               copyRect.x(), copyRect.y(),
+               &m_segmentsDrawBuffer,
+               copyRect.x(), copyRect.y(), copyRect.width(), copyRect.height());
+        m_artifactsDrawBufferRefresh |= r;
+    }
+
+    if (m_artifactsDrawBufferRefresh.isValid()) {
+        refreshArtifactsDrawBuffer(m_artifactsDrawBufferRefresh);
+        m_artifactsDrawBufferRefresh = QRect();
+    }
+
+    if (scroll) {
+        bitBlt(viewport(), 0, 0,
+               &m_artifactsDrawBuffer, 0, 0,
+               m_artifactsDrawBuffer.width(), m_artifactsDrawBuffer.height());
+    } else {
+        bitBlt(viewport(), updateRect.x(), updateRect.y(),
+               &m_artifactsDrawBuffer, updateRect.x(), updateRect.y(),
+               updateRect.width(), updateRect.height());
+    }
+
+    // DEBUG
+
+    //     QPainter pdebug(viewport());
+    //     static QPen framePen(Qt::red, 1);
+    //     pdebug.setPen(framePen);
+    //     pdebug.drawRect(updateRect);
+
+}
+
+bool CompositionView::checkScrollAndRefreshDrawBuffer(QRect &rect, bool& scroll)
+{
+    bool all = false;
+    QRect refreshRect = m_segmentsDrawBufferRefresh;
+
+    int w = visibleWidth(), h = visibleHeight();
+    int cx = contentsX(), cy = contentsY();
+
+    scroll = (cx != m_lastBufferRefreshX || cy != m_lastBufferRefreshY);
+
+    if (scroll) {
+
+        //	RG_DEBUG << "checkScrollAndRefreshDrawBuffer: scrolling by ("
+        //		 << cx - m_lastBufferRefreshX << "," << cy - m_lastBufferRefreshY << ")" << endl;
+
+        if (refreshRect.isValid()) {
+
+            // If we've scrolled and there was an existing refresh
+            // rect, we can't be sure whether the refresh rect
+            // predated or postdated the internal update of scroll
+            // location.  Cut our losses and refresh everything.
+
+            refreshRect.setRect(cx, cy, w, h);
+
+        } else {
+
+            // No existing refresh rect: we only need to handle the
+            // scroll
+
+            if (cx != m_lastBufferRefreshX) {
+
+                int dx = m_lastBufferRefreshX - cx;
+
+                if (dx > -w && dx < w) {
+
+                    QPainter cp(&m_segmentsDrawBuffer);
+                    cp.drawPixmap(dx, 0, m_segmentsDrawBuffer);
+
+                    if (dx < 0) {
+                        refreshRect |= QRect(cx + w + dx, cy, -dx, h);
+                    } else {
+                        refreshRect |= QRect(cx, cy, dx, h);
+                    }
+
+                } else {
+
+                    refreshRect.setRect(cx, cy, w, h);
+                    all = true;
+                }
+            }
+
+            if (cy != m_lastBufferRefreshY && !all) {
+
+                int dy = m_lastBufferRefreshY - cy;
+
+                if (dy > -h && dy < h) {
+
+                    QPainter cp(&m_segmentsDrawBuffer);
+                    cp.drawPixmap(0, dy, m_segmentsDrawBuffer);
+
+                    if (dy < 0) {
+                        refreshRect |= QRect(cx, cy + h + dy, w, -dy);
+                    } else {
+                        refreshRect |= QRect(cx, cy, w, dy);
+                    }
+
+                } else {
+
+                    refreshRect.setRect(cx, cy, w, h);
+                    all = true;
+                }
+            }
+        }
+    }
+
+    bool needRefresh = false;
+
+    if (refreshRect.isValid()) {
+        needRefresh = true;
+    }
+
+    if (needRefresh)
+        refreshSegmentsDrawBuffer(refreshRect);
+
+    m_segmentsDrawBufferRefresh = QRect();
+    m_lastBufferRefreshX = cx;
+    m_lastBufferRefreshY = cy;
+
+    rect |= refreshRect;
+    if (scroll)
+        rect.setRect(cx, cy, w, h);
+    return needRefresh;
+}
+
+void CompositionView::refreshSegmentsDrawBuffer(const QRect& rect)
+{
+    //    Profiler profiler("CompositionView::refreshDrawBuffer", true);
+    //      RG_DEBUG << "CompositionView::refreshSegmentsDrawBuffer() r = "
+    //  	     << rect << endl;
+
+    QPainter p(&m_segmentsDrawBuffer, viewport());
+    p.translate( -contentsX(), -contentsY());
+
+    if (!m_backgroundPixmap.isNull()) {
+        QPoint pp(rect.x() % m_backgroundPixmap.height(), rect.y() % m_backgroundPixmap.width());
+        p.drawTiledPixmap(rect, m_backgroundPixmap, pp);
+    } else {
+        p.eraseRect(rect);
+    }
+
+    drawArea(&p, rect);
+
+    // DEBUG - show what's updated
+    //    QPen framePen(Qt::red, 1);
+    //    p.setPen(framePen);
+    //    p.drawRect(rect);
+
+    //    m_segmentsDrawBufferNeedsRefresh = false;
+}
+
+void CompositionView::refreshArtifactsDrawBuffer(const QRect& rect)
+{
+    //      RG_DEBUG << "CompositionView::refreshArtifactsDrawBuffer() r = "
+    //               << rect << endl;
+
+    QPainter p;
+    p.begin(&m_artifactsDrawBuffer, viewport());
+    p.translate( -contentsX(), -contentsY());
+    //     QRect r(contentsX(), contentsY(), m_artifactsDrawBuffer.width(), m_artifactsDrawBuffer.height());
+    drawAreaArtifacts(&p, rect);
+    p.end();
+
+    //    m_artifactsDrawBufferNeedsRefresh = false;
+}
+
+void CompositionView::drawArea(QPainter *p, const QRect& clipRect)
+{
+    //     Profiler profiler("CompositionView::drawArea", true);
+
+    //     RG_DEBUG << "CompositionView::drawArea() clipRect = " << clipRect << endl;
+
+    //
+    // Fetch track dividing lines
+    //
+    CompositionModel::heightlist lineHeights = getModel()->getTrackDividersIn(clipRect);
+
+    if (!lineHeights.empty()) {
+
+        p->save();
+        QColor light = m_trackDividerColor.light();
+        p->setPen(light);
+
+        for (CompositionModel::heightlist::const_iterator hi = lineHeights.begin();
+             hi != lineHeights.end(); ++hi) {
+            int y = *hi;
+            if (y-1 >= clipRect.y()) {
+                p->drawLine(clipRect.x(), y-1,
+                            clipRect.x() + clipRect.width() - 1, y-1);
+            }
+            if (y >= clipRect.y()) {
+                p->drawLine(clipRect.x(), y,
+                            clipRect.x() + clipRect.width() - 1, y);
+            }
+        }
+
+        p->setPen(m_trackDividerColor);
+
+        for (CompositionModel::heightlist::const_iterator hi = lineHeights.begin();
+             hi != lineHeights.end(); ++hi) {
+            int y = *hi;
+            if (y-2 >= clipRect.y()) {
+                p->drawLine(clipRect.x(), y-2,
+                            clipRect.x() + clipRect.width() - 1, y-2);
+            }
+            if (y+1 >= clipRect.y()) {
+                p->drawLine(clipRect.x(), y+1,
+                            clipRect.x() + clipRect.width() - 1, y+1);
+            }
+        }
+
+        p->restore();
+    }
+
+    CompositionModel::AudioPreviewDrawData* audioPreviewData = 0;
+    CompositionModel::RectRanges* notationPreviewData = 0;
+
+    //
+    // Fetch previews
+    //
+    if (m_showPreviews) {
+        notationPreviewData = &m_notationPreviewRects;
+        m_notationPreviewRects.clear();
+        audioPreviewData = &m_audioPreviewRects;
+        m_audioPreviewRects.clear();
+    }
+
+    //
+    // Fetch segment rectangles to draw
+    //
+    const CompositionModel::rectcontainer& rects = getModel()->getRectanglesIn(clipRect,
+            notationPreviewData, audioPreviewData);
+    CompositionModel::rectcontainer::const_iterator i = rects.begin();
+    CompositionModel::rectcontainer::const_iterator end = rects.end();
+
+    //
+    // Draw Segment Rectangles
+    //
+    p->save();
+    for (; i != end; ++i) {
+        p->setBrush(i->getBrush());
+        p->setPen(i->getPen());
+
+        //         RG_DEBUG << "CompositionView::drawArea : draw comp rect " << *i << endl;
+        drawCompRect(*i, p, clipRect);
+    }
+
+    p->restore();
+
+    if (rects.size() > 1) {
+        //         RG_DEBUG << "CompositionView::drawArea : drawing intersections\n";
+        drawIntersections(rects, p, clipRect);
+    }
+
+    //
+    // Previews
+    //
+    if (m_showPreviews) {
+        p->save();
+
+        // draw audio previews
+        //
+        drawAreaAudioPreviews(p, clipRect);
+
+        // draw notation previews
+        //
+        CompositionModel::RectRanges::const_iterator npi = m_notationPreviewRects.begin();
+        CompositionModel::RectRanges::const_iterator npEnd = m_notationPreviewRects.end();
+
+        for (; npi != npEnd; ++npi) {
+            CompositionModel::RectRange interval = *npi;
+            p->save();
+            p->translate(interval.basePoint.x(), interval.basePoint.y());
+            //             RG_DEBUG << "CompositionView::drawArea : translating to x = " << interval.basePoint.x() << endl;
+            for (; interval.range.first != interval.range.second; ++interval.range.first) {
+
+                const PreviewRect& pr = *(interval.range.first);
+                QColor defaultCol = CompositionColourCache::getInstance()->SegmentInternalPreview;
+                QColor col = interval.color.isValid() ? interval.color : defaultCol;
+                p->setBrush(col);
+                p->setPen(col);
+                //                RG_DEBUG << "CompositionView::drawArea : drawing preview rect at x = " << pr.x() << endl;
+                p->drawRect(pr);
+            }
+            p->restore();
+        }
+
+        p->restore();
+    }
+
+    //
+    // Draw segment labels (they must be drawn over the preview rects)
+    //
+    if (m_showSegmentLabels) {
+        for (i = rects.begin(); i != end; ++i) {
+            drawCompRectLabel(*i, p, clipRect);
+        }
+    }
+
+    //    drawAreaArtifacts(p, clipRect);
+
+}
+
+void CompositionView::drawAreaAudioPreviews(QPainter * p, const QRect& clipRect)
+{
+    CompositionModel::AudioPreviewDrawData::const_iterator api = m_audioPreviewRects.begin();
+    CompositionModel::AudioPreviewDrawData::const_iterator apEnd = m_audioPreviewRects.end();
+    QRect rectToFill,  // rect to fill on canvas
+    localRect; // the rect of the tile to draw on the canvas
+    QPoint basePoint,  // origin of segment rect
+    drawBasePoint; // origin of rect to fill on canvas
+    QRect r;
+    for (; api != apEnd; ++api) {
+        rectToFill = api->rect;
+        basePoint = api->basePoint;
+        rectToFill.moveTopLeft(basePoint);
+        rectToFill &= clipRect;
+        r = rectToFill;
+        drawBasePoint = rectToFill.topLeft();
+        rectToFill.moveBy( -basePoint.x(), -basePoint.y());
+        int firstPixmapIdx = (r.x() - basePoint.x()) / AudioPreviewPainter::tileWidth();
+        if (firstPixmapIdx >= api->pixmap.size()) {
+            //             RG_DEBUG << "CompositionView::drawAreaAudioPreviews : WARNING - miscomputed pixmap array : r.x = "
+            //                      << r.x() << " - basePoint.x = " << basePoint.x() << " - firstPixmapIdx = " << firstPixmapIdx
+            //                      << endl;
+            continue;
+        }
+        int x = 0, idx = firstPixmapIdx;
+        //         RG_DEBUG << "CompositionView::drawAreaAudioPreviews : clipRect = " << clipRect
+        //                  << " - firstPixmapIdx = " << firstPixmapIdx << endl;
+        while (x < clipRect.width()) {
+            int pixmapRectXOffset = idx * AudioPreviewPainter::tileWidth();
+            localRect.setRect(basePoint.x() + pixmapRectXOffset, basePoint.y(),
+                              AudioPreviewPainter::tileWidth(), api->rect.height());
+            //             RG_DEBUG << "CompositionView::drawAreaAudioPreviews : initial localRect = "
+            //                      << localRect << endl;
+            localRect &= r;
+            if (idx == firstPixmapIdx && api->resizeOffset != 0) {
+                // this segment is being resized from start, clip beginning of preview
+                localRect.moveBy(api->resizeOffset, 0);
+            }
+
+            //             RG_DEBUG << "CompositionView::drawAreaAudioPreviews : localRect & clipRect = "
+            //                      << localRect << endl;
+            if (localRect.isEmpty()) {
+                //                 RG_DEBUG << "CompositionView::drawAreaAudioPreviews : localRect & clipRect is empty\n";
+                break;
+            }
+            localRect.moveBy( -(basePoint.x() + pixmapRectXOffset), -basePoint.y());
+
+            //             RG_DEBUG << "CompositionView::drawAreaAudioPreviews : drawing pixmap "
+            //                      << idx << " at " << drawBasePoint << " - localRect = " << localRect
+            //                      << " - preResizeOrigin : " << api->preResizeOrigin << endl;
+
+            p->drawImage(drawBasePoint, api->pixmap[idx], localRect,
+                         Qt::ColorOnly | Qt::ThresholdDither | Qt::AvoidDither);
+
+            ++idx;
+            if (idx >= api->pixmap.size())
+                break;
+            drawBasePoint.setX(drawBasePoint.x() + localRect.width());
+            x += localRect.width();
+        }
+    }
+}
+
+void CompositionView::drawAreaArtifacts(QPainter * p, const QRect& clipRect)
+{
+    //
+    // Playback Pointer
+    //
+    drawPointer(p, clipRect);
+
+    //
+    // Tmp rect (rect displayed while drawing a new segment)
+    //
+    if (m_tmpRect.isValid() && m_tmpRect.intersects(clipRect)) {
+        p->setBrush(m_tmpRectFill);
+        p->setPen(CompositionColourCache::getInstance()->SegmentBorder);
+        drawRect(m_tmpRect, p, clipRect);
+    }
+
+    //
+    // Tool guides (crosshairs)
+    //
+    if (m_drawGuides)
+        drawGuides(p, clipRect);
+
+    //
+    // Selection Rect
+    //
+    if (m_drawSelectionRect) {
+        drawRect(m_selectionRect, p, clipRect, false, 0, false);
+    }
+
+    //
+    // Floating Text
+    //
+    if (m_drawTextFloat)
+        drawTextFloat(p, clipRect);
+
+    //
+    // Split line
+    //
+    if (m_splitLinePos.x() > 0 && clipRect.contains(m_splitLinePos)) {
+        p->save();
+        p->setPen(m_guideColor);
+        p->drawLine(m_splitLinePos.x(), m_splitLinePos.y(),
+                    m_splitLinePos.x(), m_splitLinePos.y() + getModel()->grid().getYSnap());
+        p->restore();
+    }
+}
+
+void CompositionView::drawGuides(QPainter * p, const QRect& /*clipRect*/)
+{
+    // no need to check for clipping, these guides are meant to follow the mouse cursor
+    QPoint guideOrig(m_topGuidePos, m_foreGuidePos);
+
+    p->save();
+    p->setPen(m_guideColor);
+    p->drawLine(guideOrig.x(), 0, guideOrig.x(), contentsHeight());
+    p->drawLine(0, guideOrig.y(), contentsWidth(), guideOrig.y());
+    p->restore();
+}
+
+void CompositionView::drawCompRect(const CompositionRect& r, QPainter *p, const QRect& clipRect,
+                                   int intersectLvl, bool fill)
+{
+    p->save();
+
+    QBrush brush = r.getBrush();
+
+    if (r.isRepeating()) {
+        QColor brushColor = brush.color();
+        brush.setColor(brushColor.light(150));
+    }
+
+    p->setBrush(brush);
+    p->setPen(r.getPen());
+    drawRect(r, p, clipRect, r.isSelected(), intersectLvl, fill);
+
+    if (r.isRepeating()) {
+
+        CompositionRect::repeatmarks repeatMarks = r.getRepeatMarks();
+
+        //         RG_DEBUG << "CompositionView::drawCompRect() : drawing repeating rect " << r
+        //                  << " nb repeat marks = " << repeatMarks.size() << endl;
+
+        // draw 'start' rectangle with original brush
+        //
+        QRect startRect = r;
+        startRect.setWidth(repeatMarks[0] - r.x());
+        p->setBrush(r.getBrush());
+        drawRect(startRect, p, clipRect, r.isSelected(), intersectLvl, fill);
+
+
+        // now draw the 'repeat' marks
+        //
+        p->setPen(CompositionColourCache::getInstance()->RepeatSegmentBorder);
+        int penWidth = std::max(r.getPen().width(), 1u);
+
+        for (unsigned int i = 0; i < repeatMarks.size(); ++i) {
+            int pos = repeatMarks[i];
+            if (pos > clipRect.right())
+                break;
+
+            if (pos >= clipRect.left()) {
+                QPoint p1(pos, r.y() + penWidth),
+                p2(pos, r.y() + r.height() - penWidth - 1);
+
+                //                 RG_DEBUG << "CompositionView::drawCompRect() : drawing repeat mark at "
+                //                          << p1 << "-" << p2 << endl;
+                p->drawLine(p1, p2);
+            }
+
+        }
+
+    }
+
+    p->restore();
+}
+
+void CompositionView::drawCompRectLabel(const CompositionRect& r, QPainter *p, const QRect& clipRect)
+{
+    // draw segment label
+    //
+#ifdef NOT_DEFINED
+    if (!r.getLabel().isEmpty() /* && !r.isSelected() */)
+    {
+        p->save();
+        p->setPen(GUIPalette::getColour(GUIPalette::SegmentLabel));
+        p->setBrush(white);
+        QRect textRect(r);
+        textRect.setX(textRect.x() + 3);
+        QString label = " " + r.getLabel() + " ";
+        QRect textBoundingRect = p->boundingRect(textRect, Qt::AlignLeft | Qt::AlignVCenter, label);
+        p->drawRect(textBoundingRect & r);
+        p->drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, label);
+        p->restore();
+    }
+#else
+    if (!r.getLabel().isEmpty()) {
+
+        p->save();
+
+        QFont font;
+        font.setPixelSize(r.height() / 2.2);
+        font.setWeight(QFont::Bold);
+        font.setItalic(false);
+        p->setFont(font);
+
+        QRect labelRect = QRect
+                          (r.x(),
+                           r.y() + ((r.height() - p->fontMetrics().height()) / 2) + 1,
+                           r.width(),
+                           p->fontMetrics().height());
+
+        int x = labelRect.x() + p->fontMetrics().width('x');
+        int y = labelRect.y();
+
+        QBrush brush = r.getBrush();
+        QColor surroundColour = brush.color().light(110);
+
+        int h, s, v;
+        surroundColour.hsv(&h, &s, &v);
+        if (v < 150)
+            surroundColour.setHsv(h, s, 225);
+        p->setPen(surroundColour);
+
+        for (int i = 0; i < 9; ++i) {
+
+            if (i == 4)
+                continue;
+
+            int wx = x, wy = y;
+
+            if (i < 3)
+                --wx;
+            if (i > 5)
+                ++wx;
+            if (i % 3 == 0)
+                --wy;
+            if (i % 3 == 2)
+                ++wy;
+
+            labelRect.setX(wx);
+            labelRect.setY(wy);
+
+            p->drawText(labelRect,
+                        Qt::AlignLeft | Qt::AlignTop,
+                        r.getLabel());
+        }
+
+        labelRect.setX(x);
+        labelRect.setY(y);
+
+        p->setPen(GUIPalette::getColour
+                  (GUIPalette::SegmentLabel));
+        p->drawText(labelRect,
+                    Qt::AlignLeft | Qt::AlignVCenter, r.getLabel());
+        p->restore();
+    }
+#endif
+}
+
+void CompositionView::drawRect(const QRect& r, QPainter *p, const QRect& clipRect,
+                               bool isSelected, int intersectLvl, bool fill)
+{
+    //     RG_DEBUG << "CompositionView::drawRect : intersectLvl = " << intersectLvl
+    //              << " - brush col = " << p->brush().color() << endl;
+
+    //     RG_DEBUG << "CompositionView::drawRect " << r << " - xformed : " << p->xForm(r)
+    //              << " - contents x = " << contentsX() << ", contents y = " << contentsY() << endl;
+
+    p->save();
+
+    QRect rect = r;
+
+    if (fill) {
+        if (isSelected) {
+            QColor fillColor = p->brush().color();
+            fillColor = fillColor.dark(200);
+            QBrush b = p->brush();
+            b.setColor(fillColor);
+            p->setBrush(b);
+            //            RG_DEBUG << "CompositionView::drawRect : selected color : " << fillColor << endl;
+        }
+
+        if (intersectLvl > 0) {
+            QColor fillColor = p->brush().color();
+            fillColor = fillColor.dark((intersectLvl) * 105);
+            QBrush b = p->brush();
+            b.setColor(fillColor);
+            p->setBrush(b);
+            //            RG_DEBUG << "CompositionView::drawRect : intersected color : " << fillColor << " isSelected : " << isSelected << endl;
+        }
+    } else {
+        p->setBrush(Qt::NoBrush);
+    }
+
+    // Paint using the small coordinates...
+    QRect intersection = rect.intersect(clipRect);
+
+    if (clipRect.contains(rect)) {
+        p->drawRect(rect);
+    } else {
+        // draw only what's necessary
+        if (!intersection.isEmpty() && fill)
+            p->fillRect(intersection, p->brush());
+
+        int rectTopY = rect.y();
+
+        if (rectTopY >= clipRect.y() &&
+                rectTopY <= (clipRect.y() + clipRect.height())) {
+            // to prevent overflow, in case the original rect is too wide
+            // the line would be drawn "backwards"
+            p->drawLine(intersection.topLeft(), intersection.topRight());
+        }
+
+        int rectBottomY = rect.y() + rect.height();
+        if (rectBottomY >= clipRect.y() &&
+                rectBottomY <= (clipRect.y() + clipRect.height()))
+            // to prevent overflow, in case the original rect is too wide
+            // the line would be drawn "backwards"
+            p->drawLine(intersection.bottomLeft(), intersection.bottomRight());
+
+        int rectLeftX = rect.x();
+        if (rectLeftX >= clipRect.x() &&
+                rectLeftX <= (clipRect.x() + clipRect.width()))
+            p->drawLine(rect.topLeft(), rect.bottomLeft());
+
+        unsigned int rectRightX = rect.x() + rect.width(); // make sure we don't overflow
+        if (rectRightX >= unsigned(clipRect.x()) &&
+                rectRightX <= unsigned(clipRect.x() + clipRect.width()))
+            p->drawLine(rect.topRight(), rect.bottomRight());
+
+    }
+
+    p->restore();
+}
+
+QColor CompositionView::mixBrushes(QBrush a, QBrush b)
+{
+    QColor ac = a.color(), bc = b.color();
+
+    int aR = ac.red(), aG = ac.green(), aB = ac.blue(),
+                            bR = bc.red(), bG = bc.green(), bB = ac.blue();
+
+    ac.setRgb((aR + bR) / 2, (aG + bG) / 2, (aB + bB) / 2);
+
+    return ac;
+}
+
+void CompositionView::drawIntersections(const CompositionModel::rectcontainer& rects,
+                                        QPainter * p, const QRect& clipRect)
+{
+    if (! (rects.size() > 1))
+        return ;
+
+    CompositionModel::rectcontainer intersections;
+
+    CompositionModel::rectcontainer::const_iterator i = rects.begin(),
+            j = rects.begin();
+
+    for (; j != rects.end(); ++j) {
+
+        CompositionRect testRect = *j;
+        i = j;
+        ++i; // set i to pos after j
+
+        if (i == rects.end())
+            break;
+
+        for (; i != rects.end(); ++i) {
+            CompositionRect ri = testRect.intersect(*i);
+            if (!ri.isEmpty()) {
+                CompositionModel::rectcontainer::iterator t = std::find(intersections.begin(),
+                        intersections.end(), ri);
+                if (t == intersections.end()) {
+                    ri.setBrush(mixBrushes(testRect.getBrush(), i->getBrush()));
+                    ri.setSelected(testRect.isSelected() || i->isSelected());
+                    intersections.push_back(ri);
+                }
+
+            }
+        }
+    }
+
+    //
+    // draw this level of intersections then compute and draw further ones
+    //
+    int intersectionLvl = 1;
+
+    while (!intersections.empty()) {
+
+        for (CompositionModel::rectcontainer::iterator intIter = intersections.begin();
+                intIter != intersections.end(); ++intIter) {
+            CompositionRect r = *intIter;
+            drawCompRect(r, p, clipRect, intersectionLvl);
+        }
+
+        if (intersections.size() > 10)
+            break; // put a limit on how many intersections we can compute and draw - this grows exponentially
+
+        ++intersectionLvl;
+
+        CompositionModel::rectcontainer intersections2;
+
+        CompositionModel::rectcontainer::iterator i = intersections.begin(),
+                j = intersections.begin();
+
+        for (; j != intersections.end(); ++j) {
+
+            CompositionRect testRect = *j;
+            i = j;
+            ++i; // set i to pos after j
+
+            if (i == intersections.end())
+                break;
+
+            for (; i != intersections.end(); ++i) {
+                CompositionRect ri = testRect.intersect(*i);
+                if (!ri.isEmpty() && ri != *i) {
+                    CompositionModel::rectcontainer::iterator t = std::find(intersections2.begin(),
+                            intersections2.end(), ri);
+                    if (t == intersections2.end())
+                        ri.setBrush(mixBrushes(testRect.getBrush(), i->getBrush()));
+                    intersections2.push_back(ri);
+                }
+            }
+        }
+
+        intersections = intersections2;
+    }
+
+}
+
+void CompositionView::drawPointer(QPainter *p, const QRect& clipRect)
+{
+    //     RG_DEBUG << "CompositionView::drawPointer: clipRect "
+    // 	     << clipRect.x() << "," << clipRect.y() << " " << clipRect.width()
+    // 	     << "x" << clipRect.height() << " pointer pos is " << m_pointerPos << endl;
+
+    if (m_pointerPos >= clipRect.x() && m_pointerPos <= (clipRect.x() + clipRect.width())) {
+        p->save();
+        p->setPen(m_pointerPen);
+        p->drawLine(m_pointerPos, clipRect.y(), m_pointerPos, clipRect.y() + clipRect.height());
+        p->restore();
+    }
+
+}
+
+void CompositionView::drawTextFloat(QPainter *p, const QRect& clipRect)
+{
+    QFontMetrics metrics(p->fontMetrics());
+
+    QRect bound = p->boundingRect(0, 0, 300, metrics.height() + 6, AlignAuto, m_textFloatText);
+
+    p->save();
+
+    bound.setLeft(bound.left() - 2);
+    bound.setRight(bound.right() + 2);
+    bound.setTop(bound.top() - 2);
+    bound.setBottom(bound.bottom() + 2);
+
+    QPoint pos(m_textFloatPos);
+    if (pos.y() < 0 && getModel()) {
+        if (pos.y() + bound.height() < 0) {
+            pos.setY(pos.y() + getModel()->grid().getYSnap() * 3);
+        } else {
+            pos.setY(pos.y() + getModel()->grid().getYSnap() * 2);
+        }
+    }
+
+    bound.moveTopLeft(pos);
+
+    if (bound.intersects(clipRect)) {
+
+        p->setBrush(CompositionColourCache::getInstance()->RotaryFloatBackground);
+
+        drawRect(bound, p, clipRect, false, 0, true);
+
+        p->setPen(CompositionColourCache::getInstance()->RotaryFloatForeground);
+
+        p->drawText(pos.x() + 2, pos.y() + 3 + metrics.ascent(), m_textFloatText);
+
+    }
+
+    p->restore();
+}
+
+bool CompositionView::event(QEvent* e)
+{
+    if (e->type() == AudioPreviewThread::AudioPreviewQueueEmpty) {
+        RG_DEBUG << "CompositionView::event - AudioPreviewQueueEmpty\n";
+        slotSegmentsDrawBufferNeedsRefresh();
+        viewport()->update();
+        return true;
+    }
+
+    return RosegardenScrollView::event(e);
+}
+
+void CompositionView::enterEvent(QEvent *e)
+{
+    kapp->config()->setGroup(GeneralOptionsConfigGroup);
+    if (!kapp->config()->readBoolEntry("toolcontexthelp", true)) return;
+
+    emit showContextHelp(m_toolContextHelp);
+    m_contextHelpShown = true;
+}
+
+void CompositionView::leaveEvent(QEvent *e)
+{
+    emit showContextHelp("");
+    m_contextHelpShown = false;
+}
+
+void CompositionView::slotToolHelpChanged(const QString &text)
+{
+    if (m_toolContextHelp == text) return;
+    m_toolContextHelp = text;
+
+    kapp->config()->setGroup(GeneralOptionsConfigGroup);
+    if (!kapp->config()->readBoolEntry("toolcontexthelp", true)) return;
+
+    if (m_contextHelpShown) emit showContextHelp(text);
+}
+
+void CompositionView::contentsMousePressEvent(QMouseEvent* e)
+{
+    Qt::ButtonState bs = e->state();
+    slotSetSelectCopy((bs & Qt::ControlButton) != 0);
+    slotSetSelectAdd((bs & Qt::ShiftButton) != 0);
+    slotSetFineGrain((bs & Qt::ShiftButton) != 0);
+    slotSetPencilOverExisting((bs & Qt::AltButton + Qt::ControlButton) != 0);
+
+    switch (e->button()) {
+    case LeftButton:
+    case MidButton:
+        startAutoScroll();
+
+        if (m_tool)
+            m_tool->handleMouseButtonPress(e);
+        else
+            RG_DEBUG << "CompositionView::contentsMousePressEvent() :"
+            << this << " no tool\n";
+        break;
+    case RightButton:
+        if (m_tool)
+            m_tool->handleRightButtonPress(e);
+        else
+            RG_DEBUG << "CompositionView::contentsMousePressEvent() :"
+            << this << " no tool\n";
+        break;
+    default:
+        break;
+    }
+}
+
+void CompositionView::contentsMouseReleaseEvent(QMouseEvent* e)
+{
+    RG_DEBUG << "CompositionView::contentsMouseReleaseEvent()\n";
+
+    stopAutoScroll();
+
+    if (!m_tool)
+        return ;
+
+    if (e->button() == LeftButton ||
+        e->button() == MidButton )
+        m_tool->handleMouseButtonRelease(e);
+}
+
+void CompositionView::contentsMouseDoubleClickEvent(QMouseEvent* e)
+{
+    m_currentItem = getFirstItemAt(e->pos());
+
+    if (!m_currentItem) {
+        RG_DEBUG << "CompositionView::contentsMouseDoubleClickEvent - no currentItem\n";
+        RulerScale *ruler = grid().getRulerScale();
+        if (ruler) emit setPointerPosition(ruler->getTimeForX(e->pos().x()));
+        return ;
+    }
+
+    RG_DEBUG << "CompositionView::contentsMouseDoubleClickEvent - have currentItem\n";
+
+    CompositionItemImpl* itemImpl = dynamic_cast<CompositionItemImpl*>((_CompositionItem*)m_currentItem);
+
+    if (m_currentItem->isRepeating()) {
+        timeT time = getModel()->getRepeatTimeAt(e->pos(), m_currentItem);
+
+        RG_DEBUG << "editRepeat at time " << time << endl;
+        if (time > 0)
+            emit editRepeat(itemImpl->getSegment(), time);
+        else
+            emit editSegment(itemImpl->getSegment());
+
+    } else {
+
+        emit editSegment(itemImpl->getSegment());
+    }
+}
+
+void CompositionView::contentsMouseMoveEvent(QMouseEvent* e)
+{
+    if (!m_tool)
+        return ;
+
+    Qt::ButtonState bs = e->state();
+    slotSetFineGrain((bs & Qt::ShiftButton) != 0);
+    slotSetPencilOverExisting((bs & Qt::AltButton) != 0);
+
+    int follow = m_tool->handleMouseMove(e);
+    setScrollDirectionConstraint(follow);
+
+    if (follow != RosegardenCanvasView::NoFollow) {
+        doAutoScroll();
+
+        if (follow & RosegardenCanvasView::FollowHorizontal) {
+            slotScrollHorizSmallSteps(e->pos().x());
+
+            // enlarge composition if needed
+            if (horizontalScrollBar()->value() == horizontalScrollBar()->maxValue()) {
+                resizeContents(contentsWidth() + m_stepSize, contentsHeight());
+                setContentsPos(contentsX() + m_stepSize, contentsY());
+                getModel()->setLength(contentsWidth());
+                slotUpdateSize();
+            }
+        }
+
+        if (follow & RosegardenCanvasView::FollowVertical)
+            slotScrollVertSmallSteps(e->pos().y());
+    }
+}
+
+void CompositionView::releaseCurrentItem()
+{
+    m_currentItem = CompositionItem();
+}
+
+void CompositionView::setPointerPos(int pos)
+{
+    //     RG_DEBUG << "CompositionView::setPointerPos(" << pos << ")\n";
+    int oldPos = m_pointerPos;
+    if (oldPos == pos)
+        return ;
+
+    m_pointerPos = pos;
+    getModel()->setPointerPos(pos);
+
+    // automagically grow contents width if pointer position goes beyond right end
+    //
+    if (pos >= (contentsWidth() - m_stepSize)) {
+        resizeContents(pos + m_stepSize, contentsHeight());
+        // grow composition too, if needed (it may not be the case if
+        if (getModel()->getLength() < contentsWidth())
+            getModel()->setLength(contentsWidth());
+    }
+
+
+    // interesting -- isAutoScrolling() never seems to return true?
+    //     RG_DEBUG << "CompositionView::setPointerPos(" << pos << "), isAutoScrolling " << isAutoScrolling() << ", contentsX " << contentsX() << ", m_lastPointerRefreshX " << m_lastPointerRefreshX << ", contentsHeight " << contentsHeight() << endl;
+
+    if (contentsX() != m_lastPointerRefreshX) {
+        m_lastPointerRefreshX = contentsX();
+        // We'll need to shift the whole canvas anyway, so
+        slotArtifactsDrawBufferNeedsRefresh();
+        return ;
+    }
+
+    int deltaW = abs(m_pointerPos - oldPos);
+
+    if (deltaW <= m_pointerPen.width() * 2) { // use one rect instead of two separate ones
+
+        QRect updateRect
+        (std::min(m_pointerPos, oldPos) - m_pointerPen.width(), 0,
+         deltaW + m_pointerPen.width() * 2, contentsHeight());
+
+        slotArtifactsDrawBufferNeedsRefresh(updateRect);
+
+    } else {
+
+        slotArtifactsDrawBufferNeedsRefresh
+        (QRect(m_pointerPos - m_pointerPen.width(), 0,
+               m_pointerPen.width() * 2, contentsHeight()));
+
+        slotArtifactsDrawBufferNeedsRefresh
+        (QRect(oldPos - m_pointerPen.width(), 0,
+               m_pointerPen.width() * 2, contentsHeight()));
+    }
+}
+
+void CompositionView::setGuidesPos(int x, int y)
+{
+    m_topGuidePos = x;
+    m_foreGuidePos = y;
+    slotArtifactsDrawBufferNeedsRefresh();
+}
+
+void CompositionView::setGuidesPos(const QPoint& p)
+{
+    m_topGuidePos = p.x();
+    m_foreGuidePos = p.y();
+    slotArtifactsDrawBufferNeedsRefresh();
+}
+
+void CompositionView::setDrawGuides(bool d)
+{
+    m_drawGuides = d;
+    slotArtifactsDrawBufferNeedsRefresh();
+}
+
+void CompositionView::setTmpRect(const QRect& r)
+{
+    setTmpRect(r, m_tmpRectFill);
+}
+
+void CompositionView::setTmpRect(const QRect& r, const QColor &c)
+{
+    QRect pRect = m_tmpRect;
+    m_tmpRect = r;
+    m_tmpRectFill = c;
+    slotUpdateSegmentsDrawBuffer(m_tmpRect | pRect);
+}
+
+void CompositionView::setTextFloat(int x, int y, const QString &text)
+{
+    m_textFloatPos.setX(x);
+    m_textFloatPos.setY(y);
+    m_textFloatText = text;
+    m_drawTextFloat = true;
+    slotArtifactsDrawBufferNeedsRefresh();
+
+    // most of the time when the floating text is drawn
+    // we want to update a larger part of the view
+    // so don't update here
+    //     QRect r = fontMetrics().boundingRect(x, y, 300, 40, AlignAuto, m_textFloatText);
+    //     slotUpdateSegmentsDrawBuffer(r);
+
+
+    //    rgapp->slotSetStatusMessage(text);
+}
+
+void CompositionView::slotSetFineGrain(bool value)
+{
+    m_fineGrain = value;
+}
+
+void CompositionView::slotSetPencilOverExisting(bool value)
+{
+    m_pencilOverExisting = value;
+}
+
+void
+CompositionView::slotTextFloatTimeout()
+{
+    hideTextFloat();
+    slotArtifactsDrawBufferNeedsRefresh();
+    //    rgapp->slotSetStatusMessage(QString::null);
+}
+
+}
+#include "CompositionView.moc"