Chris@0: /* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@0:     A waveform viewer and audio annotation editor.
Chris@1:     Chris Cannam, Queen Mary University of London, 2005-2006
Chris@0:     
Chris@0:     This is experimental software.  Not for distribution.
Chris@0: */
Chris@0: 
Chris@0: #include "base/View.h"
Chris@0: #include "base/Layer.h"
Chris@0: #include "base/Model.h"
Chris@0: #include "base/ZoomConstraint.h"
Chris@0: #include "base/Profiler.h"
Chris@0: 
Chris@0: #include "layer/TimeRulerLayer.h" //!!! damn, shouldn't be including that here
Chris@0: 
Chris@0: #include <QPainter>
Chris@0: #include <QPaintEvent>
Chris@0: #include <QRect>
Chris@0: #include <QApplication>
Chris@0: 
Chris@0: #include <iostream>
Chris@16: #include <cassert>
Chris@0: 
Chris@18: //#define DEBUG_VIEW_WIDGET_PAINT 1
Chris@0: 
Chris@0: using std::cerr;
Chris@0: using std::endl;
Chris@0: 
Chris@0: View::View(QWidget *w, bool showProgress) :
Chris@0:     QFrame(w),
Chris@0:     m_centreFrame(0),
Chris@0:     m_zoomLevel(1024),
Chris@0:     m_followPan(true),
Chris@0:     m_followZoom(true),
Chris@0:     m_followPlay(PlaybackScrollPage),
Chris@0:     m_lightBackground(true),
Chris@0:     m_showProgress(showProgress),
Chris@0:     m_cache(0),
Chris@0:     m_cacheCentreFrame(0),
Chris@0:     m_cacheZoomLevel(1024),
Chris@9:     m_selectionCached(false),
Chris@0:     m_deleting(false),
Chris@8:     m_haveSelectedLayer(false),
Chris@0:     m_manager(0)
Chris@0: {
Chris@0: //    QWidget::setAttribute(Qt::WA_PaintOnScreen);
Chris@0: }
Chris@0: 
Chris@0: View::~View()
Chris@0: {
Chris@0:     m_deleting = true;
Chris@0: 
Chris@0:     for (LayerList::iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	delete *i;
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: PropertyContainer::PropertyList
Chris@0: View::getProperties() const
Chris@0: {
Chris@0:     PropertyList list;
Chris@0:     list.push_back(tr("Global Scroll"));
Chris@0:     list.push_back(tr("Global Zoom"));
Chris@0:     list.push_back(tr("Follow Playback"));
Chris@0:     return list;
Chris@0: }
Chris@0: 
Chris@0: PropertyContainer::PropertyType
Chris@0: View::getPropertyType(const PropertyName &name) const
Chris@0: {
Chris@0:     if (name == tr("Global Scroll")) return ToggleProperty;
Chris@0:     if (name == tr("Global Zoom")) return ToggleProperty;
Chris@0:     if (name == tr("Follow Playback")) return ValueProperty;
Chris@0:     return InvalidProperty;
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: View::getPropertyRangeAndValue(const PropertyName &name,
Chris@0: 				       int *min, int *max) const
Chris@0: {
Chris@0:     if (name == tr("Global Scroll")) return m_followPan;
Chris@0:     if (name == tr("Global Zoom")) return m_followZoom;
Chris@0:     if (name == tr("Follow Playback")) { *min = 0; *max = 2; return int(m_followPlay); }
Chris@0:     return PropertyContainer::getPropertyRangeAndValue(name, min, max);
Chris@0: }
Chris@0: 
Chris@0: QString
Chris@0: View::getPropertyValueLabel(const PropertyName &name,
Chris@0: 				  int value) const
Chris@0: {
Chris@0:     if (name == tr("Follow Playback")) {
Chris@0: 	switch (value) {
Chris@0: 	default:
Chris@0: 	case 0: return tr("Scroll");
Chris@0: 	case 1: return tr("Page");
Chris@0: 	case 2: return tr("Off");
Chris@0: 	}
Chris@0:     }
Chris@0:     return tr("<unknown>");
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::setProperty(const PropertyName &name, int value)
Chris@0: {
Chris@0:     if (name == tr("Global Scroll")) {
Chris@0: 	setFollowGlobalPan(value != 0);
Chris@0:     } else if (name == tr("Global Zoom")) {
Chris@0: 	setFollowGlobalZoom(value != 0);
Chris@0:     } else if (name == tr("Follow Playback")) {
Chris@0: 	switch (value) {
Chris@0: 	default:
Chris@0: 	case 0: setPlaybackFollow(PlaybackScrollContinuous); break;
Chris@0: 	case 1: setPlaybackFollow(PlaybackScrollPage); break;
Chris@0: 	case 2: setPlaybackFollow(PlaybackIgnore); break;
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: size_t
Chris@0: View::getPropertyContainerCount() const
Chris@0: {
Chris@0:     return m_layers.size() + 1; // the 1 is for me
Chris@0: }
Chris@0: 
Chris@0: const PropertyContainer *
Chris@0: View::getPropertyContainer(size_t i) const
Chris@0: {
Chris@0:     return (const PropertyContainer *)(((View *)this)->
Chris@0: 				       getPropertyContainer(i));
Chris@0: }
Chris@0: 
Chris@0: PropertyContainer *
Chris@0: View::getPropertyContainer(size_t i)
Chris@0: {
Chris@0:     if (i == 0) return this;
Chris@0:     return m_layers[i-1];
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::propertyContainerSelected(PropertyContainer *pc)
Chris@0: {
Chris@8:     if (pc == this) {
Chris@8: 	if (m_haveSelectedLayer) {
Chris@8: 	    m_haveSelectedLayer = false;
Chris@8: 	    update();
Chris@8: 	}
Chris@8: 	return;
Chris@8:     }
Chris@0: 
Chris@0:     delete m_cache;
Chris@0:     m_cache = 0;
Chris@0: 
Chris@0:     Layer *selectedLayer = 0;
Chris@0: 
Chris@0:     for (LayerList::iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	if (*i == pc) {
Chris@0: 	    selectedLayer = *i;
Chris@0: 	    m_layers.erase(i);
Chris@0: 	    break;
Chris@0: 	}
Chris@0:     }
Chris@0: 
Chris@0:     if (selectedLayer) {
Chris@8: 	m_haveSelectedLayer = true;
Chris@0: 	m_layers.push_back(selectedLayer);
Chris@0: 	update();
Chris@8:     } else {
Chris@8: 	m_haveSelectedLayer = false;
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@8: void
Chris@8: View::toolModeChanged()
Chris@8: {
Chris@8:     std::cerr << "View::toolModeChanged(" << m_manager->getToolMode() << ")" << std::endl;
Chris@8: }
Chris@8: 
Chris@0: long
Chris@0: View::getStartFrame() const
Chris@0: {
Chris@0:     size_t w2 = (width() / 2) * m_zoomLevel;
Chris@0:     size_t frame = m_centreFrame;
Chris@0:     if (frame >= w2) {
Chris@0: 	frame -= w2;
Chris@0: 	return (frame / m_zoomLevel * m_zoomLevel);
Chris@0:     } else {
Chris@0: 	frame = w2 - frame;
Chris@0: 	frame = frame / m_zoomLevel * m_zoomLevel;
Chris@0: 	return -(long)frame - m_zoomLevel;
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: size_t
Chris@0: View::getEndFrame() const
Chris@0: {
Chris@16:     return getFrameForX(width()) - 1;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::setStartFrame(long f)
Chris@0: {
Chris@0:     setCentreFrame(f + m_zoomLevel * (width() / 2));
Chris@0: }
Chris@0: 
Chris@10: bool
Chris@0: View::setCentreFrame(size_t f, bool e)
Chris@0: {
Chris@10:     bool changeVisible = false;
Chris@10: 
Chris@0:     if (m_centreFrame != f) {
Chris@0: 
Chris@0: 	int formerPixel = m_centreFrame / m_zoomLevel;
Chris@0: 
Chris@0: 	m_centreFrame = f;
Chris@0: 
Chris@0: 	int newPixel = m_centreFrame / m_zoomLevel;
Chris@0: 	
Chris@0: 	if (newPixel != formerPixel) {
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 	    std::cout << "View(" << this << ")::setCentreFrame: newPixel " << newPixel << ", formerPixel " << formerPixel << std::endl;
Chris@0: #endif
Chris@0: 	    update();
Chris@10: 
Chris@10: 	    changeVisible = true;
Chris@0: 	}
Chris@0: 
Chris@0: 	if (e) emit centreFrameChanged(this, f, m_followPan);
Chris@0:     }
Chris@10: 
Chris@10:     return changeVisible;
Chris@0: }
Chris@0: 
Chris@15: int
Chris@15: View::getXForFrame(long frame) const
Chris@15: {
Chris@15:     return (frame - getStartFrame()) / m_zoomLevel;
Chris@15: }
Chris@15: 
Chris@15: long
Chris@15: View::getFrameForX(int x) const
Chris@15: {
Chris@15:     return (long(x) * long(m_zoomLevel)) + getStartFrame();
Chris@15: }
Chris@15: 
Chris@22: int
Chris@22: View::getZoomLevel() const
Chris@22: {
Chris@22:     return m_zoomLevel;
Chris@22: }
Chris@22: 
Chris@0: void
Chris@0: View::setZoomLevel(size_t z)
Chris@0: {
Chris@0:     if (m_zoomLevel != int(z)) {
Chris@0: 	m_zoomLevel = z;
Chris@0: 	emit zoomLevelChanged(this, z, m_followZoom);
Chris@0: 	update();
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@16: View::LayerProgressBar::LayerProgressBar(QWidget *parent) :
Chris@16:     QProgressBar(parent)
Chris@16: {
Chris@16:     QFont f(font());
Chris@16:     f.setPointSize(f.pointSize() * 8 / 10);
Chris@16:     setFont(f);
Chris@16: }
Chris@16: 
Chris@0: void
Chris@0: View::addLayer(Layer *layer)
Chris@0: {
Chris@0:     delete m_cache;
Chris@0:     m_cache = 0;
Chris@0: 
Chris@0:     m_layers.push_back(layer);
Chris@0: 
Chris@0:     m_progressBars[layer] = new LayerProgressBar(this);
Chris@0:     m_progressBars[layer]->setMinimum(0);
Chris@0:     m_progressBars[layer]->setMaximum(100);
Chris@0:     m_progressBars[layer]->setMinimumWidth(80);
Chris@0:     m_progressBars[layer]->hide();
Chris@16:     
Chris@0:     connect(layer, SIGNAL(layerParametersChanged()),
Chris@0: 	    this,    SLOT(layerParametersChanged()));
Chris@0:     connect(layer, SIGNAL(layerNameChanged()),
Chris@0: 	    this,    SLOT(layerNameChanged()));
Chris@0:     connect(layer, SIGNAL(modelChanged()),
Chris@0: 	    this,    SLOT(modelChanged()));
Chris@0:     connect(layer, SIGNAL(modelCompletionChanged()),
Chris@0: 	    this,    SLOT(modelCompletionChanged()));
Chris@0:     connect(layer, SIGNAL(modelChanged(size_t, size_t)),
Chris@0: 	    this,    SLOT(modelChanged(size_t, size_t)));
Chris@0:     connect(layer, SIGNAL(modelReplaced()),
Chris@0: 	    this,    SLOT(modelReplaced()));
Chris@0: 
Chris@0:     update();
Chris@0: 
Chris@0:     emit propertyContainerAdded(layer);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::removeLayer(Layer *layer)
Chris@0: {
Chris@0:     if (m_deleting) {
Chris@0: 	return;
Chris@0:     }
Chris@0: 
Chris@0:     delete m_cache;
Chris@0:     m_cache = 0;
Chris@0: 
Chris@0:     for (LayerList::iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	if (*i == layer) {
Chris@0: 	    m_layers.erase(i);
Chris@0: 	    if (m_progressBars.find(layer) != m_progressBars.end()) {
Chris@0: 		delete m_progressBars[layer];
Chris@0: 		m_progressBars.erase(layer);
Chris@0: 	    }
Chris@0: 	    break;
Chris@0: 	}
Chris@0:     }
Chris@0:     
Chris@0:     update();
Chris@0: 
Chris@0:     emit propertyContainerRemoved(layer);
Chris@0: }
Chris@0: 
Chris@8: Layer *
Chris@8: View::getSelectedLayer()
Chris@8: {
Chris@8:     if (m_haveSelectedLayer && !m_layers.empty()) {
Chris@8: 	return getLayer(getLayerCount() - 1);
Chris@8:     } else {
Chris@8: 	return 0;
Chris@8:     }
Chris@8: }
Chris@8: 
Chris@0: void
Chris@0: View::setViewManager(ViewManager *manager)
Chris@0: {
Chris@0:     if (m_manager) {
Chris@0: 	m_manager->disconnect(this, SLOT(viewManagerCentreFrameChanged(void *, unsigned long, bool)));
Chris@0: 	m_manager->disconnect(this, SLOT(viewManagerZoomLevelChanged(void *, unsigned long, bool)));
Chris@0: 	disconnect(m_manager, SIGNAL(centreFrameChanged(void *, unsigned long, bool)));
Chris@0: 	disconnect(m_manager, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)));
Chris@8: 	disconnect(m_manager, SIGNAL(toolModeChanged()));
Chris@8: 	disconnect(m_manager, SIGNAL(selectionChanged()));
Chris@9: 	disconnect(m_manager, SIGNAL(inProgressSelectionChanged()));
Chris@0:     }
Chris@0: 
Chris@0:     m_manager = manager;
Chris@0:     if (m_followPan) setCentreFrame(m_manager->getGlobalCentreFrame(), false);
Chris@0:     if (m_followZoom) setZoomLevel(m_manager->getGlobalZoom());
Chris@0: 
Chris@0:     connect(m_manager, SIGNAL(centreFrameChanged(void *, unsigned long, bool)),
Chris@0: 	    this, SLOT(viewManagerCentreFrameChanged(void *, unsigned long, bool)));
Chris@0:     connect(m_manager, SIGNAL(playbackFrameChanged(unsigned long)),
Chris@0: 	    this, SLOT(viewManagerPlaybackFrameChanged(unsigned long)));
Chris@0:     connect(m_manager, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)),
Chris@0: 	    this, SLOT(viewManagerZoomLevelChanged(void *, unsigned long, bool)));
Chris@8:     connect(m_manager, SIGNAL(toolModeChanged()),
Chris@8: 	    this, SLOT(toolModeChanged()));
Chris@8:     connect(m_manager, SIGNAL(selectionChanged()),
Chris@9: 	    this, SLOT(selectionChanged()));
Chris@9:     connect(m_manager, SIGNAL(inProgressSelectionChanged()),
Chris@9: 	    this, SLOT(selectionChanged()));
Chris@0: 
Chris@0:     connect(this, SIGNAL(centreFrameChanged(void *, unsigned long, bool)),
Chris@0: 	    m_manager, SIGNAL(centreFrameChanged(void *, unsigned long, bool)));
Chris@0:     connect(this, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)),
Chris@0: 	    m_manager, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)));
Chris@8: 
Chris@8:     toolModeChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::setFollowGlobalPan(bool f)
Chris@0: {
Chris@0:     m_followPan = f;
Chris@0:     emit propertyContainerPropertyChanged(this);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::setFollowGlobalZoom(bool f)
Chris@0: {
Chris@0:     m_followZoom = f;
Chris@0:     emit propertyContainerPropertyChanged(this);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::setPlaybackFollow(PlaybackFollowMode m)
Chris@0: {
Chris@0:     m_followPlay = m;
Chris@0:     emit propertyContainerPropertyChanged(this);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::modelChanged()
Chris@0: {
Chris@0:     QObject *obj = sender();
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@1:     std::cerr << "View(" << this << ")::modelChanged()" << std::endl;
Chris@0: #endif
Chris@0:     delete m_cache;
Chris@0:     m_cache = 0;
Chris@0: 
Chris@0:     checkProgress(obj);
Chris@0: 
Chris@0:     update();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::modelChanged(size_t startFrame, size_t endFrame)
Chris@0: {
Chris@0:     QObject *obj = sender();
Chris@0: 
Chris@0:     long myStartFrame = getStartFrame();
Chris@0:     size_t myEndFrame = getEndFrame();
Chris@0: 
Chris@1: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@1:     std::cerr << "View(" << this << ")::modelChanged(" << startFrame << "," << endFrame << ") [me " << myStartFrame << "," << myEndFrame << "]" << std::endl;
Chris@1: #endif
Chris@1: 
Chris@0:     if (myStartFrame > 0 && endFrame < size_t(myStartFrame)) {
Chris@0: 	checkProgress(obj);
Chris@0: 	return;
Chris@0:     }
Chris@0:     if (startFrame > myEndFrame) {
Chris@0: 	checkProgress(obj);
Chris@0: 	return;
Chris@0:     }
Chris@0: 
Chris@0:     delete m_cache;
Chris@0:     m_cache = 0;
Chris@0: 
Chris@0:     if (long(startFrame) < myStartFrame) startFrame = myStartFrame;
Chris@0:     if (endFrame > myEndFrame) endFrame = myEndFrame;
Chris@0: 
Chris@15:     int x0 = getXForFrame(startFrame);
Chris@15:     int x1 = getXForFrame(endFrame + 1);
Chris@15:     if (x1 < x0) x1 = x0;
Chris@0: 
Chris@0:     checkProgress(obj);
Chris@0: 
Chris@0:     update(x0, 0, x1 - x0 + 1, height());
Chris@0: }    
Chris@0: 
Chris@0: void
Chris@0: View::modelCompletionChanged()
Chris@0: {
Chris@0:     QObject *obj = sender();
Chris@0:     checkProgress(obj);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::modelReplaced()
Chris@0: {
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@1:     std::cerr << "View(" << this << ")::modelReplaced()" << std::endl;
Chris@0: #endif
Chris@1:     delete m_cache;
Chris@1:     m_cache = 0;
Chris@1: 
Chris@0:     update();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::layerParametersChanged()
Chris@0: {
Chris@0:     Layer *layer = dynamic_cast<Layer *>(sender());
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0:     std::cerr << "View::layerParametersChanged()" << std::endl;
Chris@0: #endif
Chris@0: 
Chris@0:     delete m_cache;
Chris@0:     m_cache = 0;
Chris@0:     update();
Chris@0: 
Chris@0:     if (layer) {
Chris@0: 	emit propertyContainerPropertyChanged(layer);
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::layerNameChanged()
Chris@0: {
Chris@0:     Layer *layer = dynamic_cast<Layer *>(sender());
Chris@0:     if (layer) emit propertyContainerNameChanged(layer);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::viewManagerCentreFrameChanged(void *p, unsigned long f, bool locked)
Chris@0: {
Chris@0:     if (m_followPan && p != this && locked) {
Chris@0: 	if (m_manager && (sender() == m_manager)) {
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 	    std::cerr << this << ": manager frame changed " << f << " from " << p << std::endl;
Chris@0: #endif
Chris@0: 	    setCentreFrame(f);
Chris@0: 	    if (p == this) repaint();
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::viewManagerPlaybackFrameChanged(unsigned long f)
Chris@0: {
Chris@0:     if (m_manager) {
Chris@0: 	if (sender() != m_manager) return;
Chris@0:     }
Chris@0: 
Chris@0:     if (m_playPointerFrame == f) return;
Chris@15:     bool visible = (getXForFrame(m_playPointerFrame) != getXForFrame(f));
Chris@0:     size_t oldPlayPointerFrame = m_playPointerFrame;
Chris@0:     m_playPointerFrame = f;
Chris@0:     if (!visible) return;
Chris@0: 
Chris@21:     bool modifierPressed = // we only care about these ones
Chris@21: 	((QApplication::keyboardModifiers() & Qt::ShiftModifier) ||
Chris@21: 	 (QApplication::keyboardModifiers() & Qt::ControlModifier));
Chris@20: 
Chris@0:     switch (m_followPlay) {
Chris@0: 
Chris@0:     case PlaybackScrollContinuous:
Chris@10: 	if (QApplication::mouseButtons() == Qt::NoButton &&
Chris@21: 	    !modifierPressed) {
Chris@0: 	    setCentreFrame(f, false);
Chris@0: 	}
Chris@0: 	break;
Chris@0: 
Chris@0:     case PlaybackScrollPage:
Chris@0:     { 
Chris@15: 	int xold = getXForFrame(oldPlayPointerFrame);
Chris@10: 	repaint(xold - 1, 0, 3, height());
Chris@10: 
Chris@15: 	long w = getEndFrame() - getStartFrame();
Chris@0: 	w -= w/5;
Chris@0: 	long sf = (f / w) * w - w/8;
Chris@10: 
Chris@10: 	if (m_manager &&
Chris@10: 	    m_manager->isPlaying() &&
Chris@10: 	    m_manager->getPlaySelectionMode()) {
Chris@24: 	    MultiSelection::SelectionList selections = m_manager->getSelections();
Chris@10: 	    if (!selections.empty()) {
Chris@10: 		size_t selectionStart = selections.begin()->getStartFrame();
Chris@10: 		if (sf < long(selectionStart) - w / 10) {
Chris@10: 		    sf = long(selectionStart) - w / 10;
Chris@10: 		}
Chris@10: 	    }
Chris@10: 	}
Chris@10: 
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 	std::cerr << "PlaybackScrollPage: f = " << f << ", sf = " << sf << ", start frame "
Chris@0: 		  << getStartFrame() << std::endl;
Chris@0: #endif
Chris@10: 
Chris@15: 	// We don't consider scrolling unless the pointer is outside
Chris@15: 	// the clearly visible range already
Chris@15: 
Chris@15: 	int xnew = getXForFrame(m_playPointerFrame);
Chris@15: 
Chris@18: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@18: 	std::cerr << "xnew = " << xnew << ", width = " << width() << std::endl;
Chris@18: #endif
Chris@18: 
Chris@15: 	if (xnew < width()/8 || xnew > (width()*7)/8) {
Chris@15: 	    if (QApplication::mouseButtons() == Qt::NoButton &&
Chris@21: 		!modifierPressed) {
Chris@15: 		long offset = getFrameForX(width()/2) - getStartFrame();
Chris@15: 		long newCentre = sf + offset;
Chris@15: 		bool changed = setCentreFrame(newCentre, false);
Chris@15: 		if (changed) {
Chris@15: 		    xold = getXForFrame(oldPlayPointerFrame);
Chris@15: 		    update(xold - 1, 0, 3, height());
Chris@15: 		}
Chris@10: 	    }
Chris@10: 	}
Chris@10: 
Chris@0: 	update(xnew - 1, 0, 3, height());
Chris@10: 
Chris@0: 	break;
Chris@0:     }
Chris@0: 
Chris@0:     case PlaybackIgnore:
Chris@0: 	if (long(f) >= getStartFrame() && f < getEndFrame()) {
Chris@0: 	    update();
Chris@0: 	}
Chris@0: 	break;
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::viewManagerZoomLevelChanged(void *p, unsigned long z, bool locked)
Chris@0: {
Chris@0:     if (m_followZoom && p != this && locked) {
Chris@0: 	if (m_manager && (sender() == m_manager)) {
Chris@0: 	    setZoomLevel(z);
Chris@0: 	    if (p == this) repaint();
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@9: void
Chris@9: View::selectionChanged()
Chris@9: {
Chris@9:     if (m_selectionCached) {
Chris@9: 	delete m_cache;
Chris@9: 	m_cache = 0;
Chris@9: 	m_selectionCached = false;
Chris@9:     }
Chris@9:     update();
Chris@9: }
Chris@9: 
Chris@0: size_t
Chris@0: View::getModelsStartFrame() const
Chris@0: {
Chris@0:     bool first = true;
Chris@0:     size_t startFrame = 0;
Chris@0: 
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 
Chris@0: 	if ((*i)->getModel() && (*i)->getModel()->isOK()) {
Chris@0: 
Chris@0: 	    size_t thisStartFrame = (*i)->getModel()->getStartFrame();
Chris@0: 
Chris@0: 	    if (first || thisStartFrame < startFrame) {
Chris@0: 		startFrame = thisStartFrame;
Chris@0: 	    }
Chris@0: 	    first = false;
Chris@0: 	}
Chris@0:     }
Chris@0:     return startFrame;
Chris@0: }
Chris@0: 
Chris@0: size_t
Chris@0: View::getModelsEndFrame() const
Chris@0: {
Chris@0:     bool first = true;
Chris@0:     size_t endFrame = 0;
Chris@0: 
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 
Chris@0: 	if ((*i)->getModel() && (*i)->getModel()->isOK()) {
Chris@0: 
Chris@0: 	    size_t thisEndFrame = (*i)->getModel()->getEndFrame();
Chris@0: 
Chris@0: 	    if (first || thisEndFrame > endFrame) {
Chris@0: 		endFrame = thisEndFrame;
Chris@0: 	    }
Chris@0: 	    first = false;
Chris@0: 	}
Chris@0:     }
Chris@0: 
Chris@0:     if (first) return getModelsStartFrame();
Chris@0:     return endFrame;
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: View::getModelsSampleRate() const
Chris@0: {
Chris@0:     //!!! Just go for the first, for now.  If we were supporting
Chris@0:     // multiple samplerates, we'd probably want to do frame/time
Chris@0:     // conversion in the model
Chris@0: 
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	if ((*i)->getModel() && (*i)->getModel()->isOK()) {
Chris@0: 	    return (*i)->getModel()->getSampleRate();
Chris@0: 	}
Chris@0:     }
Chris@0:     return 0;
Chris@0: }
Chris@0: 
Chris@0: bool
Chris@0: View::areLayersScrollable() const
Chris@0: {
Chris@0:     // True iff all views are scrollable
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	if (!(*i)->isLayerScrollable()) return false;
Chris@0:     }
Chris@0:     return true;
Chris@0: }
Chris@0: 
Chris@0: View::LayerList
Chris@0: View::getScrollableBackLayers(bool &changed) const
Chris@0: {
Chris@0:     changed = false;
Chris@0: 
Chris@0:     LayerList scrollables;
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	if ((*i)->isLayerScrollable()) scrollables.push_back(*i);
Chris@0: 	else {
Chris@0: 	    if (scrollables != m_lastScrollableBackLayers) {
Chris@0: 		m_lastScrollableBackLayers = scrollables;
Chris@0: 		changed = true;
Chris@0: 	    }
Chris@0: 	    return scrollables;
Chris@0: 	}
Chris@0:     }
Chris@0: 
Chris@0:     if (scrollables.size() == 1 &&
Chris@0: 	dynamic_cast<TimeRulerLayer *>(*scrollables.begin())) {
Chris@0: 
Chris@0: 	// If only the ruler is scrollable, it's not worth the bother
Chris@0: 	// -- it probably redraws as quickly as it refreshes from
Chris@0: 	// cache
Chris@0: 	scrollables.clear();
Chris@0:     }
Chris@0: 
Chris@0:     if (scrollables != m_lastScrollableBackLayers) {
Chris@0: 	m_lastScrollableBackLayers = scrollables;
Chris@0: 	changed = true;
Chris@0:     }
Chris@0:     return scrollables;
Chris@0: }
Chris@0: 
Chris@0: View::LayerList
Chris@0: View::getNonScrollableFrontLayers(bool &changed) const
Chris@0: {
Chris@0:     changed = false;
Chris@0:     LayerList scrollables = getScrollableBackLayers(changed);
Chris@0:     LayerList nonScrollables;
Chris@0: 
Chris@0:     // Everything in front of the first non-scrollable from the back
Chris@0:     // should also be considered non-scrollable
Chris@0: 
Chris@0:     size_t count = 0;
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 	if (count < scrollables.size()) {
Chris@0: 	    ++count;
Chris@0: 	    continue;
Chris@0: 	}
Chris@0: 	nonScrollables.push_back(*i);
Chris@0:     }
Chris@0: 
Chris@0:     if (nonScrollables != m_lastNonScrollableBackLayers) {
Chris@0: 	m_lastNonScrollableBackLayers = nonScrollables;
Chris@0: 	changed = true;
Chris@0:     }
Chris@0: 
Chris@0:     return nonScrollables;
Chris@0: }
Chris@0: 
Chris@0: size_t
Chris@0: View::getZoomConstraintBlockSize(size_t blockSize,
Chris@0: 				 ZoomConstraint::RoundingDirection dir)
Chris@0:     const
Chris@0: {
Chris@0:     size_t candidate = blockSize;
Chris@0:     bool haveCandidate = false;
Chris@0: 
Chris@0:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@0: 
Chris@0: 	if ((*i)->getZoomConstraint()) {
Chris@0: 
Chris@0: 	    size_t thisBlockSize = 
Chris@0: 		(*i)->getZoomConstraint()->getNearestBlockSize
Chris@0: 		(blockSize, dir);
Chris@0: 
Chris@0: 	    // Go for the block size that's furthest from the one
Chris@0: 	    // passed in.  Most of the time, that's what we want.
Chris@0: 	    if (!haveCandidate ||
Chris@0: 		(thisBlockSize > blockSize && thisBlockSize > candidate) ||
Chris@0: 		(thisBlockSize < blockSize && thisBlockSize < candidate)) {
Chris@0: 		candidate = thisBlockSize;
Chris@0: 		haveCandidate = true;
Chris@0: 	    }
Chris@0: 	}
Chris@0:     }
Chris@0: 
Chris@0:     return candidate;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::zoom(bool in)
Chris@0: {
Chris@0:     int newZoomLevel = m_zoomLevel;
Chris@0: 
Chris@0:     if (in) {
Chris@0: 	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel - 1, 
Chris@0: 						  ZoomConstraint::RoundDown);
Chris@0:     } else {
Chris@0: 	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel + 1,
Chris@0: 						  ZoomConstraint::RoundUp);
Chris@0:     }
Chris@0: 
Chris@0:     if (newZoomLevel != m_zoomLevel) {
Chris@0: 	setZoomLevel(newZoomLevel);
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@12: View::scroll(bool right, bool lots)
Chris@12: {
Chris@12:     long delta;
Chris@12:     if (lots) {
Chris@15: 	delta = (getEndFrame() - getStartFrame()) / 2;
Chris@12:     } else {
Chris@15: 	delta = (getEndFrame() - getStartFrame()) / 20;
Chris@12:     }
Chris@12:     if (right) delta = -delta;
Chris@12: 
Chris@12:     if (int(m_centreFrame) < delta) {
Chris@12: 	setCentreFrame(0);
Chris@12:     } else if (int(m_centreFrame) - delta >= int(getModelsEndFrame())) {
Chris@12: 	setCentreFrame(getModelsEndFrame());
Chris@12:     } else {
Chris@12: 	setCentreFrame(m_centreFrame - delta);
Chris@12:     }
Chris@12: }
Chris@12: 
Chris@12: void
Chris@0: View::checkProgress(void *object)
Chris@0: {
Chris@0:     if (!m_showProgress) return;
Chris@0: 
Chris@0:     int ph = height();
Chris@0: 
Chris@0:     for (ProgressMap::const_iterator i = m_progressBars.begin();
Chris@0: 	 i != m_progressBars.end(); ++i) {
Chris@0: 
Chris@0: 	if (i->first == object) {
Chris@0: 
Chris@0: 	    int completion = i->first->getCompletion();
Chris@0: 
Chris@0: 	    if (completion >= 100) {
Chris@0: 
Chris@0: 		i->second->hide();
Chris@0: 
Chris@0: 	    } else {
Chris@0: 
Chris@0: 		i->second->setText(i->first->getPropertyContainerName());
Chris@0: 		i->second->setValue(completion);
Chris@0: 		i->second->move(0, ph - i->second->height());
Chris@0: 
Chris@0: 		i->second->show();
Chris@0: 		i->second->update();
Chris@0: 
Chris@0: 		ph -= i->second->height();
Chris@0: 	    }
Chris@0: 	} else {
Chris@0: 	    if (i->second->isVisible()) {
Chris@0: 		ph -= i->second->height();
Chris@0: 	    }
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: View::paintEvent(QPaintEvent *e)
Chris@0: {
Chris@0: //    Profiler prof("View::paintEvent", true);
Chris@0: //    std::cerr << "View::paintEvent" << std::endl;
Chris@0: 
Chris@0:     if (m_layers.empty()) {
Chris@0: 	QFrame::paintEvent(e);
Chris@0: 	return;
Chris@0:     }
Chris@0: 
Chris@0:     // ensure our constraints are met
Chris@0:     m_zoomLevel = getZoomConstraintBlockSize(m_zoomLevel,
Chris@0: 					     ZoomConstraint::RoundUp);
Chris@0: 
Chris@0:     QPainter paint;
Chris@0:     bool repaintCache = false;
Chris@0:     bool paintedCacheRect = false;
Chris@0: 
Chris@0:     QRect cacheRect(rect());
Chris@0: 
Chris@0:     if (e) {
Chris@0: 	cacheRect &= e->rect();
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 	std::cerr << "paint rect " << cacheRect.width() << "x" << cacheRect.height()
Chris@0: 		  << ", my rect " << width() << "x" << height() << std::endl;
Chris@0: #endif
Chris@0:     }
Chris@0: 
Chris@0:     QRect nonCacheRect(cacheRect);
Chris@0: 
Chris@0:     // If not all layers are scrollable, but some of the back layers
Chris@0:     // are, we should store only those in the cache
Chris@0: 
Chris@0:     bool layersChanged = false;
Chris@0:     LayerList scrollables = getScrollableBackLayers(layersChanged);
Chris@0:     LayerList nonScrollables = getNonScrollableFrontLayers(layersChanged);
Chris@9:     bool selectionCacheable = nonScrollables.empty();
Chris@9:     bool haveSelections = m_manager && !m_manager->getSelections().empty();
Chris@9:     bool selectionDrawn = false;
Chris@0: 
Chris@10:     if (!selectionCacheable) {
Chris@10: 	selectionCacheable = true;
Chris@10: 	for (LayerList::const_iterator i = nonScrollables.begin();
Chris@10: 	     i != nonScrollables.end(); ++i) {
Chris@10: 	    if ((*i)->isLayerOpaque()) {
Chris@10: 		selectionCacheable = false;
Chris@10: 		break;
Chris@10: 	    }
Chris@10: 	}
Chris@10:     }
Chris@10: 
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0:     std::cerr << "View(" << this << ")::paintEvent: have " << scrollables.size()
Chris@0: 	      << " scrollable back layers and " << nonScrollables.size()
Chris@0: 	      << " non-scrollable front layers" << std::endl;
Chris@9:     std::cerr << "haveSelections " << haveSelections << ", selectionCacheable "
Chris@9: 	      << selectionCacheable << ", m_selectionCached " << m_selectionCached << std::endl;
Chris@0: #endif
Chris@0: 
Chris@9:     if (layersChanged || scrollables.empty() ||
Chris@9: 	(haveSelections && (selectionCacheable != m_selectionCached))) {
Chris@0: 	delete m_cache;
Chris@0: 	m_cache = 0;
Chris@9: 	m_selectionCached = false;
Chris@0:     }
Chris@0: 
Chris@0:     if (!scrollables.empty()) {
Chris@0: 	if (!m_cache ||
Chris@0: 	    m_cacheZoomLevel != m_zoomLevel ||
Chris@0: 	    width() != m_cache->width() ||
Chris@0: 	    height() != m_cache->height()) {
Chris@0: 
Chris@0: 	    // cache is not valid
Chris@0: 
Chris@0: 	    if (cacheRect.width() < width()/10) {
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 		std::cerr << "View(" << this << ")::paintEvent: small repaint, not bothering to recreate cache" << std::endl;
Chris@0: #endif
Chris@0: 	    } else {
Chris@0: 		delete m_cache;
Chris@0: 		m_cache = new QPixmap(width(), height());
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 		std::cerr << "View(" << this << ")::paintEvent: recreated cache" << std::endl;
Chris@0: #endif
Chris@0: 		cacheRect = rect();
Chris@0: 		repaintCache = true;
Chris@0: 	    }
Chris@0: 
Chris@0: 	} else if (m_cacheCentreFrame != m_centreFrame) {
Chris@0: 
Chris@15: 	    long dx =
Chris@15: 		getXForFrame(m_cacheCentreFrame) -
Chris@15: 		getXForFrame(m_centreFrame);
Chris@0: 
Chris@0: 	    if (dx > -width() && dx < width()) {
Chris@0: #if defined(Q_WS_WIN32) || defined(Q_WS_MAC)
Chris@0: 		// Copying a pixmap to itself doesn't work properly on Windows
Chris@0: 		// or Mac (it only works when moving in one direction)
Chris@0: 		static QPixmap *tmpPixmap = 0;
Chris@0: 		if (!tmpPixmap ||
Chris@0: 		    tmpPixmap->width() != width() ||
Chris@0: 		    tmpPixmap->height() != height()) {
Chris@0: 		    delete tmpPixmap;
Chris@0: 		    tmpPixmap = new QPixmap(width(), height());
Chris@0: 		}
Chris@0: 		paint.begin(tmpPixmap);
Chris@0: 		paint.drawPixmap(0, 0, *m_cache);
Chris@0: 		paint.end();
Chris@0: 		paint.begin(m_cache);
Chris@0: 		paint.drawPixmap(dx, 0, *tmpPixmap);
Chris@0: 		paint.end();
Chris@0: #else
Chris@0: 		// But it seems to be fine on X11
Chris@0: 		paint.begin(m_cache);
Chris@0: 		paint.drawPixmap(dx, 0, *m_cache);
Chris@0: 		paint.end();
Chris@0: #endif
Chris@0: 
Chris@0: 		if (dx < 0) {
Chris@0: 		    cacheRect = QRect(width() + dx, 0, -dx, height());
Chris@0: 		} else {
Chris@0: 		    cacheRect = QRect(0, 0, dx, height());
Chris@0: 		}
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 		std::cerr << "View(" << this << ")::paintEvent: scrolled cache by " << dx << std::endl;
Chris@0: #endif
Chris@0: 	    } else {
Chris@0: 		cacheRect = rect();
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 		std::cerr << "View(" << this << ")::paintEvent: scrolling too far" << std::endl;
Chris@0: #endif
Chris@0: 	    }
Chris@0: 	    repaintCache = true;
Chris@0: 
Chris@0: 	} else {
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: 	    std::cerr << "View(" << this << ")::paintEvent: cache is good" << std::endl;
Chris@0: #endif
Chris@0: 	    paint.begin(this);
Chris@0: 	    paint.drawPixmap(cacheRect, *m_cache, cacheRect);
Chris@0: 	    paint.end();
Chris@0: 	    QFrame::paintEvent(e);
Chris@0: 	    paintedCacheRect = true;
Chris@0: 	}
Chris@0: 
Chris@0: 	m_cacheCentreFrame = m_centreFrame;
Chris@0: 	m_cacheZoomLevel = m_zoomLevel;
Chris@0:     }
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@0: //    std::cerr << "View(" << this << ")::paintEvent: cacheRect " << cacheRect << ", nonCacheRect " << (nonCacheRect | cacheRect) << ", repaintCache " << repaintCache << ", paintedCacheRect " << paintedCacheRect << std::endl;
Chris@0: #endif
Chris@0: 
Chris@0:     // Scrollable (cacheable) items first
Chris@0: 
Chris@0:     if (!paintedCacheRect) {
Chris@0: 
Chris@0: 	if (repaintCache) paint.begin(m_cache);
Chris@0: 	else paint.begin(this);
Chris@0: 
Chris@0: 	paint.setClipRect(cacheRect);
Chris@0: 	
Chris@0: 	if (hasLightBackground()) {
Chris@0: 	    paint.setPen(Qt::white);
Chris@0: 	    paint.setBrush(Qt::white);
Chris@0: 	} else {
Chris@0: 	    paint.setPen(Qt::black);
Chris@0: 	    paint.setBrush(Qt::black);
Chris@0: 	}
Chris@0: 	paint.drawRect(cacheRect);
Chris@0: 
Chris@0: 	paint.setPen(Qt::black);
Chris@0: 	paint.setBrush(Qt::NoBrush);
Chris@0: 	
Chris@0: 	for (LayerList::iterator i = scrollables.begin(); i != scrollables.end(); ++i) {
Chris@8: 	    paint.setRenderHint(QPainter::Antialiasing, false);
Chris@8: 	    paint.save();
Chris@0: 	    (*i)->paint(paint, cacheRect);
Chris@8: 	    paint.restore();
Chris@0: 	}
Chris@9: 
Chris@9: 	if (haveSelections && selectionCacheable) {
Chris@9: 	    drawSelections(paint);
Chris@9: 	    m_selectionCached = repaintCache;
Chris@9: 	    selectionDrawn = true;
Chris@9: 	}
Chris@0: 	
Chris@0: 	paint.end();
Chris@0: 
Chris@0: 	if (repaintCache) {
Chris@0: 	    cacheRect |= (e ? e->rect() : rect());
Chris@0: 	    paint.begin(this);
Chris@0: 	    paint.drawPixmap(cacheRect, *m_cache, cacheRect);
Chris@0: 	    paint.end();
Chris@0: 	}
Chris@0:     }
Chris@0: 
Chris@0:     // Now non-cacheable items.  We always need to redraw the
Chris@0:     // non-cacheable items across at least the area we drew of the
Chris@0:     // cacheable items.
Chris@0: 
Chris@0:     nonCacheRect |= cacheRect;
Chris@0: 
Chris@0:     paint.begin(this);
Chris@0:     paint.setClipRect(nonCacheRect);
Chris@0: 
Chris@0:     if (scrollables.empty()) {
Chris@0: 	if (hasLightBackground()) {
Chris@0: 	    paint.setPen(Qt::white);
Chris@0: 	    paint.setBrush(Qt::white);
Chris@0: 	} else {
Chris@0: 	    paint.setPen(Qt::black);
Chris@0: 	    paint.setBrush(Qt::black);
Chris@0: 	}
Chris@0: 	paint.drawRect(nonCacheRect);
Chris@0:     }
Chris@0: 	
Chris@0:     paint.setPen(Qt::black);
Chris@0:     paint.setBrush(Qt::NoBrush);
Chris@0: 	
Chris@0:     for (LayerList::iterator i = nonScrollables.begin(); i != nonScrollables.end(); ++i) {
Chris@0: 	(*i)->paint(paint, nonCacheRect);
Chris@0:     }
Chris@0: 	
Chris@9:     paint.end();
Chris@8: 
Chris@9:     paint.begin(this);
Chris@9:     if (e) paint.setClipRect(e->rect());
Chris@9:     if (!m_selectionCached) {
Chris@9: 	drawSelections(paint);
Chris@8:     }
Chris@0:     paint.end();
Chris@0: 
Chris@0:     if (m_followPlay != PlaybackScrollContinuous) {
Chris@0: 
Chris@0: 	paint.begin(this);
Chris@0: 
Chris@0: 	if (long(m_playPointerFrame) > getStartFrame() &&
Chris@0: 	    m_playPointerFrame < getEndFrame()) {
Chris@0: 
Chris@15: 	    int playx = getXForFrame(m_playPointerFrame);
Chris@0: 
Chris@0: 	    paint.setPen(Qt::black);
Chris@0: 	    paint.drawLine(playx - 1, 0, playx - 1, height() - 1);
Chris@0: 	    paint.drawLine(playx + 1, 0, playx + 1, height() - 1);
Chris@0: 	    paint.drawPoint(playx, 0);
Chris@0: 	    paint.drawPoint(playx, height() - 1);
Chris@0: 	    paint.setPen(Qt::white);
Chris@0: 	    paint.drawLine(playx, 1, playx, height() - 2);
Chris@0: 	}
Chris@0: 
Chris@0: 	paint.end();
Chris@0:     }
Chris@0: 
Chris@0:     QFrame::paintEvent(e);
Chris@0: }
Chris@0: 
Chris@9: void
Chris@9: View::drawSelections(QPainter &paint)
Chris@9: {
Chris@24:     MultiSelection::SelectionList selections;
Chris@9: 
Chris@9:     if (m_manager) {
Chris@9: 	selections = m_manager->getSelections();
Chris@9: 	if (m_manager->haveInProgressSelection()) {
Chris@9: 	    bool exclusive;
Chris@9: 	    Selection inProgressSelection =
Chris@9: 		m_manager->getInProgressSelection(exclusive);
Chris@9: 	    if (exclusive) selections.clear();
Chris@9: 	    selections.insert(inProgressSelection);
Chris@9: 	}
Chris@9:     }
Chris@9: 
Chris@9:     paint.save();
Chris@9:     paint.setPen(QColor(150, 150, 255));
Chris@9:     paint.setBrush(QColor(150, 150, 255, 80));
Chris@9: 
Chris@10:     int sampleRate = getModelsSampleRate();
Chris@10: 
Chris@10:     const QFontMetrics &metrics = paint.fontMetrics();
Chris@10: 
Chris@24:     for (MultiSelection::SelectionList::iterator i = selections.begin();
Chris@9: 	 i != selections.end(); ++i) {
Chris@9: 
Chris@15: 	int p0 = getXForFrame(i->getStartFrame());
Chris@15: 	int p1 = getXForFrame(i->getEndFrame());
Chris@9: 
Chris@10: 	if (p1 < 0 || p0 > width()) continue;
Chris@9: 
Chris@9: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@9: 	std::cerr << "View::drawSelections: " << p0 << ",-1 [" << (p1-p0) << "x" << (height()+1) << "]" << std::endl;
Chris@9: #endif
Chris@9: 
Chris@9: 	paint.drawRect(p0, -1, p1 - p0, height() + 1);
Chris@10: 
Chris@10: 	if (sampleRate && shouldLabelSelections()) {
Chris@10: 	    
Chris@10: 	    QString startText = QString("%1 / %2")
Chris@10: 		.arg(QString::fromStdString
Chris@10: 		     (RealTime::frame2RealTime
Chris@10: 		      (i->getStartFrame(), sampleRate).toText(true)))
Chris@10: 		.arg(i->getStartFrame());
Chris@10: 	    
Chris@10: 	    QString endText = QString(" %1 / %2")
Chris@10: 		.arg(QString::fromStdString
Chris@10: 		     (RealTime::frame2RealTime
Chris@10: 		      (i->getEndFrame(), sampleRate).toText(true)))
Chris@10: 		.arg(i->getEndFrame());
Chris@10: 	    
Chris@10: 	    QString durationText = QString("(%1 / %2) ")
Chris@10: 		.arg(QString::fromStdString
Chris@10: 		     (RealTime::frame2RealTime
Chris@10: 		      (i->getEndFrame() - i->getStartFrame(), sampleRate)
Chris@10: 		      .toText(true)))
Chris@10: 		.arg(i->getEndFrame() - i->getStartFrame());
Chris@10: 
Chris@10: 	    int sw = metrics.width(startText),
Chris@10: 		ew = metrics.width(endText),
Chris@10: 		dw = metrics.width(durationText);
Chris@10: 
Chris@10: 	    int sy = metrics.ascent() + metrics.height() + 4;
Chris@10: 	    int ey = sy;
Chris@10: 	    int dy = sy + metrics.height();
Chris@10: 
Chris@10: 	    int sx = p0 + 2;
Chris@10: 	    int ex = sx;
Chris@10: 	    int dx = sx;
Chris@10: 
Chris@10: 	    if (sw + ew > (p1 - p0)) {
Chris@10: 		ey += metrics.height();
Chris@10: 		dy += metrics.height();
Chris@10: 	    }
Chris@10: 
Chris@10: 	    if (ew < (p1 - p0)) {
Chris@10: 		ex = p1 - 2 - ew;
Chris@10: 	    }
Chris@10: 
Chris@10: 	    if (dw < (p1 - p0)) {
Chris@10: 		dx = p1 - 2 - dw;
Chris@10: 	    }
Chris@10: 
Chris@10: 	    paint.drawText(sx, sy, startText);
Chris@10: 	    paint.drawText(ex, ey, endText);
Chris@10: 	    paint.drawText(dx, dy, durationText);
Chris@10: 	}
Chris@9:     }
Chris@9: 
Chris@9:     paint.restore();
Chris@9: }
Chris@9: 
Chris@3: QString
Chris@3: View::toXmlString(QString indent, QString extraAttributes) const
Chris@3: {
Chris@3:     QString s;
Chris@3: 
Chris@3:     s += indent;
Chris@3: 
Chris@3:     s += QString("<view "
Chris@3: 		 "centre=\"%1\" "
Chris@3: 		 "zoom=\"%2\" "
Chris@3: 		 "followPan=\"%3\" "
Chris@3: 		 "followZoom=\"%4\" "
Chris@3: 		 "tracking=\"%5\" "
Chris@3: 		 "light=\"%6\" %7>\n")
Chris@3: 	.arg(m_centreFrame)
Chris@3: 	.arg(m_zoomLevel)
Chris@3: 	.arg(m_followPan)
Chris@3: 	.arg(m_followZoom)
Chris@3: 	.arg(m_followPlay == PlaybackScrollContinuous ? "scroll" :
Chris@3: 	     m_followPlay == PlaybackScrollPage ? "page" : "ignore")
Chris@3: 	.arg(m_lightBackground)
Chris@3: 	.arg(extraAttributes);
Chris@3: 
Chris@3:     for (size_t i = 0; i < m_layers.size(); ++i) {
Chris@3: 	s += m_layers[i]->toXmlString(indent + "  ");
Chris@3:     }
Chris@3: 
Chris@4:     s += indent + "</view>\n";
Chris@3: 
Chris@3:     return s;
Chris@3: }
Chris@3: 
Chris@3: 
Chris@0: #ifdef INCLUDE_MOCFILES
Chris@0: #include "View.moc.cpp"
Chris@0: #endif
Chris@0: