Chris@127: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@127: 
Chris@127: /*
Chris@127:     Sonic Visualiser
Chris@127:     An audio file viewer and annotation editor.
Chris@127:     Centre for Digital Music, Queen Mary, University of London.
Chris@127:     This file copyright 2006 Chris Cannam.
Chris@127:     
Chris@127:     This program is free software; you can redistribute it and/or
Chris@127:     modify it under the terms of the GNU General Public License as
Chris@127:     published by the Free Software Foundation; either version 2 of the
Chris@127:     License, or (at your option) any later version.  See the file
Chris@127:     COPYING included with this distribution for more information.
Chris@127: */
Chris@127: 
Chris@128: #include "View.h"
Chris@128: #include "layer/Layer.h"
Chris@128: #include "data/model/Model.h"
Chris@127: #include "base/ZoomConstraint.h"
Chris@127: #include "base/Profiler.h"
Chris@127: 
Chris@127: #include "layer/TimeRulerLayer.h" //!!! damn, shouldn't be including that here
Chris@128: #include "data/model/PowerOfSqrtTwoZoomConstraint.h" //!!! likewise
Chris@127: 
Chris@127: #include <QPainter>
Chris@127: #include <QPaintEvent>
Chris@127: #include <QRect>
Chris@127: #include <QApplication>
Chris@127: 
Chris@127: #include <iostream>
Chris@127: #include <cassert>
Chris@127: #include <math.h>
Chris@127: 
Chris@127: //#define DEBUG_VIEW_WIDGET_PAINT 1
Chris@127: 
Chris@127: using std::cerr;
Chris@127: using std::endl;
Chris@127: 
Chris@127: View::View(QWidget *w, bool showProgress) :
Chris@127:     QFrame(w),
Chris@127:     m_centreFrame(0),
Chris@127:     m_zoomLevel(1024),
Chris@127:     m_followPan(true),
Chris@127:     m_followZoom(true),
Chris@127:     m_followPlay(PlaybackScrollPage),
Chris@153:     m_playPointerFrame(0),
Chris@127:     m_lightBackground(true),
Chris@127:     m_showProgress(showProgress),
Chris@127:     m_cache(0),
Chris@127:     m_cacheCentreFrame(0),
Chris@127:     m_cacheZoomLevel(1024),
Chris@127:     m_selectionCached(false),
Chris@127:     m_deleting(false),
Chris@127:     m_haveSelectedLayer(false),
Chris@127:     m_manager(0),
Chris@127:     m_propertyContainer(new ViewPropertyContainer(this))
Chris@127: {
Chris@127: //    QWidget::setAttribute(Qt::WA_PaintOnScreen);
Chris@127: }
Chris@127: 
Chris@127: View::~View()
Chris@127: {
Chris@127: //    std::cerr << "View::~View(" << this << ")" << std::endl;
Chris@127: 
Chris@127:     m_deleting = true;
Chris@127:     delete m_propertyContainer;
Chris@127: }
Chris@127: 
Chris@127: PropertyContainer::PropertyList
Chris@127: View::getProperties() const
Chris@127: {
Chris@127:     PropertyContainer::PropertyList list;
Chris@127:     list.push_back("Global Scroll");
Chris@127:     list.push_back("Global Zoom");
Chris@127:     list.push_back("Follow Playback");
Chris@127:     return list;
Chris@127: }
Chris@127: 
Chris@127: QString
Chris@127: View::getPropertyLabel(const PropertyName &pn) const
Chris@127: {
Chris@127:     if (pn == "Global Scroll") return tr("Global Scroll");
Chris@127:     if (pn == "Global Zoom") return tr("Global Zoom");
Chris@127:     if (pn == "Follow Playback") return tr("Follow Playback");
Chris@127:     return "";
Chris@127: }
Chris@127: 
Chris@127: PropertyContainer::PropertyType
Chris@127: View::getPropertyType(const PropertyContainer::PropertyName &name) const
Chris@127: {
Chris@127:     if (name == "Global Scroll") return PropertyContainer::ToggleProperty;
Chris@127:     if (name == "Global Zoom") return PropertyContainer::ToggleProperty;
Chris@127:     if (name == "Follow Playback") return PropertyContainer::ValueProperty;
Chris@127:     return PropertyContainer::InvalidProperty;
Chris@127: }
Chris@127: 
Chris@127: int
Chris@127: View::getPropertyRangeAndValue(const PropertyContainer::PropertyName &name,
Chris@127: 			       int *min, int *max) const
Chris@127: {
Chris@127:     if (name == "Global Scroll") return m_followPan;
Chris@127:     if (name == "Global Zoom") return m_followZoom;
Chris@127:     if (name == "Follow Playback") {
Chris@127: 	if (min) *min = 0;
Chris@127: 	if (max) *max = 2;
Chris@127: 	return int(m_followPlay);
Chris@127:     }
Chris@127:     if (min) *min = 0;
Chris@127:     if (max) *max = 0;
Chris@127:     return 0;
Chris@127: }
Chris@127: 
Chris@127: QString
Chris@127: View::getPropertyValueLabel(const PropertyContainer::PropertyName &name,
Chris@127: 			    int value) const
Chris@127: {
Chris@127:     if (name == "Follow Playback") {
Chris@127: 	switch (value) {
Chris@127: 	default:
Chris@127: 	case 0: return tr("Scroll");
Chris@127: 	case 1: return tr("Page");
Chris@127: 	case 2: return tr("Off");
Chris@127: 	}
Chris@127:     }
Chris@127:     return tr("<unknown>");
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setProperty(const PropertyContainer::PropertyName &name, int value)
Chris@127: {
Chris@127:     if (name == "Global Scroll") {
Chris@127: 	setFollowGlobalPan(value != 0);
Chris@127:     } else if (name == "Global Zoom") {
Chris@127: 	setFollowGlobalZoom(value != 0);
Chris@127:     } else if (name == "Follow Playback") {
Chris@127: 	switch (value) {
Chris@127: 	default:
Chris@127: 	case 0: setPlaybackFollow(PlaybackScrollContinuous); break;
Chris@127: 	case 1: setPlaybackFollow(PlaybackScrollPage); break;
Chris@127: 	case 2: setPlaybackFollow(PlaybackIgnore); break;
Chris@127: 	}
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: size_t
Chris@127: View::getPropertyContainerCount() const
Chris@127: {
Chris@127:     return m_layers.size() + 1; // the 1 is for me
Chris@127: }
Chris@127: 
Chris@127: const PropertyContainer *
Chris@127: View::getPropertyContainer(size_t i) const
Chris@127: {
Chris@127:     return (const PropertyContainer *)(((View *)this)->
Chris@127: 				       getPropertyContainer(i));
Chris@127: }
Chris@127: 
Chris@127: PropertyContainer *
Chris@127: View::getPropertyContainer(size_t i)
Chris@127: {
Chris@127:     if (i == 0) return m_propertyContainer;
Chris@127:     return m_layers[i-1];
Chris@127: }
Chris@127: 
Chris@127: bool
Chris@127: View::getValueExtents(QString unit, float &min, float &max, bool &log) const
Chris@127: {
Chris@127:     bool have = false;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin();
Chris@127:          i != m_layers.end(); ++i) { 
Chris@127: 
Chris@127:         QString layerUnit;
Chris@127:         float layerMin = 0.0, layerMax = 0.0;
Chris@127:         float displayMin = 0.0, displayMax = 0.0;
Chris@127:         bool layerLog = false;
Chris@127: 
Chris@127:         if ((*i)->getValueExtents(layerMin, layerMax, layerLog, layerUnit) &&
Chris@127:             layerUnit.toLower() == unit.toLower()) {
Chris@127: 
Chris@127:             if ((*i)->getDisplayExtents(displayMin, displayMax)) {
Chris@127: 
Chris@127:                 min = displayMin;
Chris@127:                 max = displayMax;
Chris@127:                 log = layerLog;
Chris@127:                 have = true;
Chris@127:                 break;
Chris@127: 
Chris@127:             } else {
Chris@127: 
Chris@127:                 if (!have || layerMin < min) min = layerMin;
Chris@127:                 if (!have || layerMax > max) max = layerMax;
Chris@127:                 if (layerLog) log = true;
Chris@127:                 have = true;
Chris@127:             }
Chris@127:         }
Chris@127:     }
Chris@127: 
Chris@127:     return have;
Chris@127: }
Chris@127: 
Chris@127: int
Chris@127: View::getTextLabelHeight(const Layer *layer, QPainter &paint) const
Chris@127: {
Chris@127:     std::map<int, Layer *> sortedLayers;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin();
Chris@127:          i != m_layers.end(); ++i) { 
Chris@127:         if ((*i)->needsTextLabelHeight()) {
Chris@127:             sortedLayers[getObjectExportId(*i)] = *i;
Chris@127:         }
Chris@127:     }
Chris@127: 
Chris@127:     int y = 15 + paint.fontMetrics().ascent();
Chris@127: 
Chris@127:     for (std::map<int, Layer *>::const_iterator i = sortedLayers.begin();
Chris@127:          i != sortedLayers.end(); ++i) {
Chris@127:         if (i->second == layer) return y;
Chris@127:         y += paint.fontMetrics().height();
Chris@127:     }
Chris@127: 
Chris@127:     return y;
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::propertyContainerSelected(View *client, PropertyContainer *pc)
Chris@127: {
Chris@127:     if (client != this) return;
Chris@127:     
Chris@127:     if (pc == m_propertyContainer) {
Chris@127: 	if (m_haveSelectedLayer) {
Chris@127: 	    m_haveSelectedLayer = false;
Chris@127: 	    update();
Chris@127: 	}
Chris@127: 	return;
Chris@127:     }
Chris@127: 
Chris@127:     delete m_cache;
Chris@127:     m_cache = 0;
Chris@127: 
Chris@127:     Layer *selectedLayer = 0;
Chris@127: 
Chris@127:     for (LayerList::iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 	if (*i == pc) {
Chris@127: 	    selectedLayer = *i;
Chris@127: 	    m_layers.erase(i);
Chris@127: 	    break;
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     if (selectedLayer) {
Chris@127: 	m_haveSelectedLayer = true;
Chris@127: 	m_layers.push_back(selectedLayer);
Chris@127: 	update();
Chris@127:     } else {
Chris@127: 	m_haveSelectedLayer = false;
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::toolModeChanged()
Chris@127: {
Chris@127: //    std::cerr << "View::toolModeChanged(" << m_manager->getToolMode() << ")" << std::endl;
Chris@127: }
Chris@127: 
Chris@133: void
Chris@133: View::overlayModeChanged()
Chris@133: {
Chris@133:     update();
Chris@133: }
Chris@133: 
Chris@133: void
Chris@133: View::zoomWheelsEnabledChanged()
Chris@133: {
Chris@133:     // subclass might override this
Chris@133: }
Chris@133: 
Chris@127: long
Chris@127: View::getStartFrame() const
Chris@127: {
Chris@127:     size_t w2 = (width() / 2) * m_zoomLevel;
Chris@127:     size_t frame = m_centreFrame;
Chris@127:     if (frame >= w2) {
Chris@127: 	frame -= w2;
Chris@127: 	return (frame / m_zoomLevel * m_zoomLevel);
Chris@127:     } else {
Chris@127: 	frame = w2 - frame;
Chris@127: 	frame = frame / m_zoomLevel * m_zoomLevel;
Chris@127: 	return -(long)frame - m_zoomLevel;
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: size_t
Chris@127: View::getEndFrame() const
Chris@127: {
Chris@127:     return getFrameForX(width()) - 1;
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setStartFrame(long f)
Chris@127: {
Chris@127:     setCentreFrame(f + m_zoomLevel * (width() / 2));
Chris@127: }
Chris@127: 
Chris@127: bool
Chris@127: View::setCentreFrame(size_t f, bool e)
Chris@127: {
Chris@127:     bool changeVisible = false;
Chris@127: 
Chris@127:     if (m_centreFrame != f) {
Chris@127: 
Chris@127: 	int formerPixel = m_centreFrame / m_zoomLevel;
Chris@127: 
Chris@127: 	m_centreFrame = f;
Chris@127: 
Chris@127: 	int newPixel = m_centreFrame / m_zoomLevel;
Chris@127: 	
Chris@127: 	if (newPixel != formerPixel) {
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	    std::cout << "View(" << this << ")::setCentreFrame: newPixel " << newPixel << ", formerPixel " << formerPixel << std::endl;
Chris@127: #endif
Chris@127: 	    update();
Chris@127: 
Chris@127: 	    changeVisible = true;
Chris@127: 	}
Chris@127: 
Chris@127: 	if (e) emit centreFrameChanged(this, f, m_followPan);
Chris@127:     }
Chris@127: 
Chris@127:     return changeVisible;
Chris@127: }
Chris@127: 
Chris@127: int
Chris@127: View::getXForFrame(long frame) const
Chris@127: {
Chris@127:     return (frame - getStartFrame()) / m_zoomLevel;
Chris@127: }
Chris@127: 
Chris@127: long
Chris@127: View::getFrameForX(int x) const
Chris@127: {
Chris@127:     return (long(x) * long(m_zoomLevel)) + getStartFrame();
Chris@127: }
Chris@127: 
Chris@127: float
Chris@127: View::getYForFrequency(float frequency,
Chris@127: 		       float minf,
Chris@127: 		       float maxf, 
Chris@127: 		       bool logarithmic) const
Chris@127: {
Chris@127:     int h = height();
Chris@127: 
Chris@127:     if (logarithmic) {
Chris@127: 
Chris@127: 	static float lastminf = 0.0, lastmaxf = 0.0;
Chris@127: 	static float logminf = 0.0, logmaxf = 0.0;
Chris@127: 
Chris@127: 	if (lastminf != minf) {
Chris@127: 	    lastminf = (minf == 0.0 ? 1.0 : minf);
Chris@127: 	    logminf = log10f(minf);
Chris@127: 	}
Chris@127: 	if (lastmaxf != maxf) {
Chris@127: 	    lastmaxf = (maxf < lastminf ? lastminf : maxf);
Chris@127: 	    logmaxf = log10f(maxf);
Chris@127: 	}
Chris@127: 
Chris@127: 	if (logminf == logmaxf) return 0;
Chris@127: 	return h - (h * (log10f(frequency) - logminf)) / (logmaxf - logminf);
Chris@127: 
Chris@127:     } else {
Chris@127: 	
Chris@127: 	if (minf == maxf) return 0;
Chris@127: 	return h - (h * (frequency - minf)) / (maxf - minf);
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: float
Chris@127: View::getFrequencyForY(int y,
Chris@127: 		       float minf,
Chris@127: 		       float maxf,
Chris@127: 		       bool logarithmic) const
Chris@127: {
Chris@127:     int h = height();
Chris@127: 
Chris@127:     if (logarithmic) {
Chris@127: 
Chris@127: 	static float lastminf = 0.0, lastmaxf = 0.0;
Chris@127: 	static float logminf = 0.0, logmaxf = 0.0;
Chris@127: 
Chris@127: 	if (lastminf != minf) {
Chris@127: 	    lastminf = (minf == 0.0 ? 1.0 : minf);
Chris@127: 	    logminf = log10f(minf);
Chris@127: 	}
Chris@127: 	if (lastmaxf != maxf) {
Chris@127: 	    lastmaxf = (maxf < lastminf ? lastminf : maxf);
Chris@127: 	    logmaxf = log10f(maxf);
Chris@127: 	}
Chris@127: 
Chris@127: 	if (logminf == logmaxf) return 0;
Chris@127: 	return pow(10.f, logminf + ((logmaxf - logminf) * (h - y)) / h);
Chris@127: 
Chris@127:     } else {
Chris@127: 
Chris@127: 	if (minf == maxf) return 0;
Chris@127: 	return minf + ((h - y) * (maxf - minf)) / h;
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: int
Chris@127: View::getZoomLevel() const
Chris@127: {
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	std::cout << "zoom level: " << m_zoomLevel << std::endl;
Chris@127: #endif
Chris@127:     return m_zoomLevel;
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setZoomLevel(size_t z)
Chris@127: {
Chris@127:     if (m_zoomLevel != int(z)) {
Chris@127: 	m_zoomLevel = z;
Chris@127: 	emit zoomLevelChanged(this, z, m_followZoom);
Chris@127: 	update();
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: View::LayerProgressBar::LayerProgressBar(QWidget *parent) :
Chris@127:     QProgressBar(parent)
Chris@127: {
Chris@127:     QFont f(font());
Chris@127:     f.setPointSize(f.pointSize() * 8 / 10);
Chris@127:     setFont(f);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::addLayer(Layer *layer)
Chris@127: {
Chris@127:     delete m_cache;
Chris@127:     m_cache = 0;
Chris@127: 
Chris@127:     m_layers.push_back(layer);
Chris@127: 
Chris@127:     m_progressBars[layer] = new LayerProgressBar(this);
Chris@127:     m_progressBars[layer]->setMinimum(0);
Chris@127:     m_progressBars[layer]->setMaximum(100);
Chris@127:     m_progressBars[layer]->setMinimumWidth(80);
Chris@127:     m_progressBars[layer]->hide();
Chris@127:     
Chris@127:     connect(layer, SIGNAL(layerParametersChanged()),
Chris@127: 	    this,    SLOT(layerParametersChanged()));
Chris@127:     connect(layer, SIGNAL(layerNameChanged()),
Chris@127: 	    this,    SLOT(layerNameChanged()));
Chris@127:     connect(layer, SIGNAL(modelChanged()),
Chris@127: 	    this,    SLOT(modelChanged()));
Chris@127:     connect(layer, SIGNAL(modelCompletionChanged()),
Chris@127: 	    this,    SLOT(modelCompletionChanged()));
Chris@127:     connect(layer, SIGNAL(modelChanged(size_t, size_t)),
Chris@127: 	    this,    SLOT(modelChanged(size_t, size_t)));
Chris@127:     connect(layer, SIGNAL(modelReplaced()),
Chris@127: 	    this,    SLOT(modelReplaced()));
Chris@127: 
Chris@127:     update();
Chris@127: 
Chris@127:     emit propertyContainerAdded(layer);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::removeLayer(Layer *layer)
Chris@127: {
Chris@127:     if (m_deleting) {
Chris@127: 	return;
Chris@127:     }
Chris@127: 
Chris@127:     delete m_cache;
Chris@127:     m_cache = 0;
Chris@127: 
Chris@127:     for (LayerList::iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 	if (*i == layer) {
Chris@127: 	    m_layers.erase(i);
Chris@127: 	    if (m_progressBars.find(layer) != m_progressBars.end()) {
Chris@127: 		delete m_progressBars[layer];
Chris@127: 		m_progressBars.erase(layer);
Chris@127: 	    }
Chris@127: 	    break;
Chris@127: 	}
Chris@127:     }
Chris@127:     
Chris@127:     update();
Chris@127: 
Chris@127:     emit propertyContainerRemoved(layer);
Chris@127: }
Chris@127: 
Chris@127: Layer *
Chris@127: View::getSelectedLayer()
Chris@127: {
Chris@127:     if (m_haveSelectedLayer && !m_layers.empty()) {
Chris@127: 	return getLayer(getLayerCount() - 1);
Chris@127:     } else {
Chris@127: 	return 0;
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: const Layer *
Chris@127: View::getSelectedLayer() const
Chris@127: {
Chris@127:     return const_cast<const Layer *>(const_cast<View *>(this)->getSelectedLayer());
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setViewManager(ViewManager *manager)
Chris@127: {
Chris@127:     if (m_manager) {
Chris@127: 	m_manager->disconnect(this, SLOT(viewManagerCentreFrameChanged(void *, unsigned long, bool)));
Chris@127: 	m_manager->disconnect(this, SLOT(viewManagerZoomLevelChanged(void *, unsigned long, bool)));
Chris@127: 	disconnect(m_manager, SIGNAL(centreFrameChanged(void *, unsigned long, bool)));
Chris@127: 	disconnect(m_manager, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)));
Chris@127: 	disconnect(m_manager, SIGNAL(toolModeChanged()));
Chris@127: 	disconnect(m_manager, SIGNAL(selectionChanged()));
Chris@127: 	disconnect(m_manager, SIGNAL(inProgressSelectionChanged()));
Chris@127:     }
Chris@127: 
Chris@127:     m_manager = manager;
Chris@127:     if (m_followPan) setCentreFrame(m_manager->getGlobalCentreFrame(), false);
Chris@127:     if (m_followZoom) setZoomLevel(m_manager->getGlobalZoom());
Chris@127: 
Chris@127:     connect(m_manager, SIGNAL(centreFrameChanged(void *, unsigned long, bool)),
Chris@127: 	    this, SLOT(viewManagerCentreFrameChanged(void *, unsigned long, bool)));
Chris@127:     connect(m_manager, SIGNAL(playbackFrameChanged(unsigned long)),
Chris@127: 	    this, SLOT(viewManagerPlaybackFrameChanged(unsigned long)));
Chris@127:     connect(m_manager, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)),
Chris@127: 	    this, SLOT(viewManagerZoomLevelChanged(void *, unsigned long, bool)));
Chris@127:     connect(m_manager, SIGNAL(toolModeChanged()),
Chris@127: 	    this, SLOT(toolModeChanged()));
Chris@127:     connect(m_manager, SIGNAL(selectionChanged()),
Chris@127: 	    this, SLOT(selectionChanged()));
Chris@127:     connect(m_manager, SIGNAL(inProgressSelectionChanged()),
Chris@127: 	    this, SLOT(selectionChanged()));
Chris@127:     connect(m_manager, SIGNAL(overlayModeChanged()),
Chris@133:             this, SLOT(overlayModeChanged()));
Chris@133:     connect(m_manager, SIGNAL(zoomWheelsEnabledChanged()),
Chris@133:             this, SLOT(zoomWheelsEnabledChanged()));
Chris@127: 
Chris@127:     connect(this, SIGNAL(centreFrameChanged(void *, unsigned long, bool)),
Chris@127: 	    m_manager, SIGNAL(centreFrameChanged(void *, unsigned long, bool)));
Chris@127:     connect(this, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)),
Chris@127: 	    m_manager, SIGNAL(zoomLevelChanged(void *, unsigned long, bool)));
Chris@127: 
Chris@127:     toolModeChanged();
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setFollowGlobalPan(bool f)
Chris@127: {
Chris@127:     m_followPan = f;
Chris@127:     emit propertyContainerPropertyChanged(m_propertyContainer);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setFollowGlobalZoom(bool f)
Chris@127: {
Chris@127:     m_followZoom = f;
Chris@127:     emit propertyContainerPropertyChanged(m_propertyContainer);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::drawVisibleText(QPainter &paint, int x, int y, QString text, TextStyle style)
Chris@127: {
Chris@127:     if (style == OutlinedText) {
Chris@127: 
Chris@127: 	QColor origPenColour = paint.pen().color();
Chris@127: 	QColor penColour = origPenColour;
Chris@127: 	QColor surroundColour = Qt::white;  //palette().background().color();
Chris@127: 
Chris@127: 	if (!hasLightBackground()) {
Chris@127: 	    int h, s, v;
Chris@127: 	    penColour.getHsv(&h, &s, &v);
Chris@127: 	    penColour = QColor::fromHsv(h, s, 255 - v);
Chris@127: 	    surroundColour = Qt::black;
Chris@127: 	}
Chris@127: 
Chris@127: 	paint.setPen(surroundColour);
Chris@127: 
Chris@127: 	for (int dx = -1; dx <= 1; ++dx) {
Chris@127: 	    for (int dy = -1; dy <= 1; ++dy) {
Chris@127: 		if (!(dx || dy)) continue;
Chris@127: 		paint.drawText(x + dx, y + dy, text);
Chris@127: 	    }
Chris@127: 	}
Chris@127: 
Chris@127: 	paint.setPen(penColour);
Chris@127: 
Chris@127: 	paint.drawText(x, y, text);
Chris@127: 
Chris@127: 	paint.setPen(origPenColour);
Chris@127: 
Chris@127:     } else {
Chris@127: 
Chris@127: 	std::cerr << "ERROR: View::drawVisibleText: Boxed style not yet implemented!" << std::endl;
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::setPlaybackFollow(PlaybackFollowMode m)
Chris@127: {
Chris@127:     m_followPlay = m;
Chris@127:     emit propertyContainerPropertyChanged(m_propertyContainer);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::modelChanged()
Chris@127: {
Chris@127:     QObject *obj = sender();
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127:     std::cerr << "View(" << this << ")::modelChanged()" << std::endl;
Chris@127: #endif
Chris@127:     
Chris@127:     // If the model that has changed is not used by any of the cached
Chris@127:     // layers, we won't need to recreate the cache
Chris@127:     
Chris@127:     bool recreate = false;
Chris@127: 
Chris@127:     bool discard;
Chris@127:     LayerList scrollables = getScrollableBackLayers(false, discard);
Chris@127:     for (LayerList::const_iterator i = scrollables.begin();
Chris@127: 	 i != scrollables.end(); ++i) {
Chris@127: 	if (*i == obj || (*i)->getModel() == obj) {
Chris@127: 	    recreate = true;
Chris@127: 	    break;
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     if (recreate) {
Chris@127: 	delete m_cache;
Chris@127: 	m_cache = 0;
Chris@127:     }
Chris@127: 
Chris@127:     checkProgress(obj);
Chris@127: 
Chris@127:     update();
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::modelChanged(size_t startFrame, size_t endFrame)
Chris@127: {
Chris@127:     QObject *obj = sender();
Chris@127: 
Chris@127:     long myStartFrame = getStartFrame();
Chris@127:     size_t myEndFrame = getEndFrame();
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127:     std::cerr << "View(" << this << ")::modelChanged(" << startFrame << "," << endFrame << ") [me " << myStartFrame << "," << myEndFrame << "]" << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127:     if (myStartFrame > 0 && endFrame < size_t(myStartFrame)) {
Chris@127: 	checkProgress(obj);
Chris@127: 	return;
Chris@127:     }
Chris@127:     if (startFrame > myEndFrame) {
Chris@127: 	checkProgress(obj);
Chris@127: 	return;
Chris@127:     }
Chris@127: 
Chris@127:     // If the model that has changed is not used by any of the cached
Chris@127:     // layers, we won't need to recreate the cache
Chris@127:     
Chris@127:     bool recreate = false;
Chris@127: 
Chris@127:     bool discard;
Chris@127:     LayerList scrollables = getScrollableBackLayers(false, discard);
Chris@127:     for (LayerList::const_iterator i = scrollables.begin();
Chris@127: 	 i != scrollables.end(); ++i) {
Chris@127: 	if (*i == obj || (*i)->getModel() == obj) {
Chris@127: 	    recreate = true;
Chris@127: 	    break;
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     if (recreate) {
Chris@127: 	delete m_cache;
Chris@127: 	m_cache = 0;
Chris@127:     }
Chris@127: 
Chris@127:     if (long(startFrame) < myStartFrame) startFrame = myStartFrame;
Chris@127:     if (endFrame > myEndFrame) endFrame = myEndFrame;
Chris@127: 
Chris@127:     int x0 = getXForFrame(startFrame);
Chris@127:     int x1 = getXForFrame(endFrame + 1);
Chris@127:     if (x1 < x0) x1 = x0;
Chris@127: 
Chris@127:     checkProgress(obj);
Chris@127: 
Chris@127:     update();
Chris@127: //!!!    update(x0, 0, x1 - x0 + 1, height());
Chris@127: }    
Chris@127: 
Chris@127: void
Chris@127: View::modelCompletionChanged()
Chris@127: {
Chris@127:     QObject *obj = sender();
Chris@127:     checkProgress(obj);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::modelReplaced()
Chris@127: {
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127:     std::cerr << "View(" << this << ")::modelReplaced()" << std::endl;
Chris@127: #endif
Chris@127:     delete m_cache;
Chris@127:     m_cache = 0;
Chris@127: 
Chris@127:     update();
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::layerParametersChanged()
Chris@127: {
Chris@127:     Layer *layer = dynamic_cast<Layer *>(sender());
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127:     std::cerr << "View::layerParametersChanged()" << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127:     delete m_cache;
Chris@127:     m_cache = 0;
Chris@127:     update();
Chris@127: 
Chris@127:     if (layer) {
Chris@127: 	emit propertyContainerPropertyChanged(layer);
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::layerNameChanged()
Chris@127: {
Chris@127:     Layer *layer = dynamic_cast<Layer *>(sender());
Chris@127:     if (layer) emit propertyContainerNameChanged(layer);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::viewManagerCentreFrameChanged(void *p, unsigned long f, bool locked)
Chris@127: {
Chris@127:     if (m_followPan && p != this && locked) {
Chris@127: 	if (m_manager && (sender() == m_manager)) {
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	    std::cerr << this << ": manager frame changed " << f << " from " << p << std::endl;
Chris@127: #endif
Chris@127: 	    setCentreFrame(f);
Chris@127: 	    if (p == this) repaint();
Chris@127: 	}
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::viewManagerPlaybackFrameChanged(unsigned long f)
Chris@127: {
Chris@127:     if (m_manager) {
Chris@127: 	if (sender() != m_manager) return;
Chris@127:     }
Chris@127: 
Chris@127:     if (m_playPointerFrame == f) return;
Chris@127:     bool visible = (getXForFrame(m_playPointerFrame) != getXForFrame(f));
Chris@127:     size_t oldPlayPointerFrame = m_playPointerFrame;
Chris@127:     m_playPointerFrame = f;
Chris@127:     if (!visible) return;
Chris@127: 
Chris@127:     switch (m_followPlay) {
Chris@127: 
Chris@127:     case PlaybackScrollContinuous:
Chris@127: 	if (QApplication::mouseButtons() == Qt::NoButton) {
Chris@127: 	    setCentreFrame(f, false);
Chris@127: 	}
Chris@127: 	break;
Chris@127: 
Chris@127:     case PlaybackScrollPage:
Chris@127:     { 
Chris@127: 	int xold = getXForFrame(oldPlayPointerFrame);
Chris@127: 	update(xold - 1, 0, 3, height());
Chris@127: 
Chris@127: 	long w = getEndFrame() - getStartFrame();
Chris@127: 	w -= w/5;
Chris@127: 	long sf = (f / w) * w - w/8;
Chris@127: 
Chris@127: 	if (m_manager &&
Chris@127: 	    m_manager->isPlaying() &&
Chris@127: 	    m_manager->getPlaySelectionMode()) {
Chris@127: 	    MultiSelection::SelectionList selections = m_manager->getSelections();
Chris@127: 	    if (!selections.empty()) {
Chris@127: 		size_t selectionStart = selections.begin()->getStartFrame();
Chris@127: 		if (sf < long(selectionStart) - w / 10) {
Chris@127: 		    sf = long(selectionStart) - w / 10;
Chris@127: 		}
Chris@127: 	    }
Chris@127: 	}
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	std::cerr << "PlaybackScrollPage: f = " << f << ", sf = " << sf << ", start frame "
Chris@127: 		  << getStartFrame() << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127: 	// We don't consider scrolling unless the pointer is outside
Chris@127: 	// the clearly visible range already
Chris@127: 
Chris@127: 	int xnew = getXForFrame(m_playPointerFrame);
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	std::cerr << "xnew = " << xnew << ", width = " << width() << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127: 	if (xnew < width()/8 || xnew > (width()*7)/8) {
Chris@127: 	    if (QApplication::mouseButtons() == Qt::NoButton) {
Chris@127: 		long offset = getFrameForX(width()/2) - getStartFrame();
Chris@127: 		long newCentre = sf + offset;
Chris@127: 		bool changed = setCentreFrame(newCentre, false);
Chris@127: 		if (changed) {
Chris@127: 		    xold = getXForFrame(oldPlayPointerFrame);
Chris@127: 		    update(xold - 1, 0, 3, height());
Chris@127: 		}
Chris@127: 	    }
Chris@127: 	}
Chris@127: 
Chris@127: 	update(xnew - 1, 0, 3, height());
Chris@127: 
Chris@127: 	break;
Chris@127:     }
Chris@127: 
Chris@127:     case PlaybackIgnore:
Chris@127: 	if (long(f) >= getStartFrame() && f < getEndFrame()) {
Chris@127: 	    update();
Chris@127: 	}
Chris@127: 	break;
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::viewManagerZoomLevelChanged(void *p, unsigned long z, bool locked)
Chris@127: {
Chris@127:     if (m_followZoom && p != this && locked) {
Chris@127: 	if (m_manager && (sender() == m_manager)) {
Chris@127: 	    setZoomLevel(z);
Chris@127: 	    if (p == this) repaint();
Chris@127: 	}
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::selectionChanged()
Chris@127: {
Chris@127:     if (m_selectionCached) {
Chris@127: 	delete m_cache;
Chris@127: 	m_cache = 0;
Chris@127: 	m_selectionCached = false;
Chris@127:     }
Chris@127:     update();
Chris@127: }
Chris@127: 
Chris@127: size_t
Chris@127: View::getModelsStartFrame() const
Chris@127: {
Chris@127:     bool first = true;
Chris@127:     size_t startFrame = 0;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 
Chris@127: 	if ((*i)->getModel() && (*i)->getModel()->isOK()) {
Chris@127: 
Chris@127: 	    size_t thisStartFrame = (*i)->getModel()->getStartFrame();
Chris@127: 
Chris@127: 	    if (first || thisStartFrame < startFrame) {
Chris@127: 		startFrame = thisStartFrame;
Chris@127: 	    }
Chris@127: 	    first = false;
Chris@127: 	}
Chris@127:     }
Chris@127:     return startFrame;
Chris@127: }
Chris@127: 
Chris@127: size_t
Chris@127: View::getModelsEndFrame() const
Chris@127: {
Chris@127:     bool first = true;
Chris@127:     size_t endFrame = 0;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 
Chris@127: 	if ((*i)->getModel() && (*i)->getModel()->isOK()) {
Chris@127: 
Chris@127: 	    size_t thisEndFrame = (*i)->getModel()->getEndFrame();
Chris@127: 
Chris@127: 	    if (first || thisEndFrame > endFrame) {
Chris@127: 		endFrame = thisEndFrame;
Chris@127: 	    }
Chris@127: 	    first = false;
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     if (first) return getModelsStartFrame();
Chris@127:     return endFrame;
Chris@127: }
Chris@127: 
Chris@127: int
Chris@127: View::getModelsSampleRate() const
Chris@127: {
Chris@127:     //!!! Just go for the first, for now.  If we were supporting
Chris@127:     // multiple samplerates, we'd probably want to do frame/time
Chris@127:     // conversion in the model
Chris@127: 
Chris@159:     //!!! nah, this wants to always return the sr of the main model!
Chris@159: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 	if ((*i)->getModel() && (*i)->getModel()->isOK()) {
Chris@127: 	    return (*i)->getModel()->getSampleRate();
Chris@127: 	}
Chris@127:     }
Chris@127:     return 0;
Chris@127: }
Chris@127: 
Chris@127: bool
Chris@127: View::areLayersScrollable() const
Chris@127: {
Chris@127:     // True iff all views are scrollable
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 	if (!(*i)->isLayerScrollable(this)) return false;
Chris@127:     }
Chris@127:     return true;
Chris@127: }
Chris@127: 
Chris@127: View::LayerList
Chris@127: View::getScrollableBackLayers(bool testChanged, bool &changed) const
Chris@127: {
Chris@127:     changed = false;
Chris@127: 
Chris@127:     // We want a list of all the scrollable layers that are behind the
Chris@127:     // backmost non-scrollable layer.
Chris@127: 
Chris@127:     LayerList scrollables;
Chris@127:     bool metUnscrollable = false;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@132: //        std::cerr << "View::getScrollableBackLayers: calling isLayerDormant on layer " << *i << std::endl;
Chris@132: //        std::cerr << "(name is " << (*i)->objectName().toStdString() << ")"
Chris@132: //                  << std::endl;
Chris@132: //        std::cerr << "View::getScrollableBackLayers: I am " << this << std::endl;
Chris@127: 	if ((*i)->isLayerDormant(this)) continue;
Chris@127: 	if ((*i)->isLayerOpaque()) {
Chris@127: 	    // You can't see anything behind an opaque layer!
Chris@127: 	    scrollables.clear();
Chris@127:             if (metUnscrollable) break;
Chris@127: 	}
Chris@127: 	if (!metUnscrollable && (*i)->isLayerScrollable(this)) {
Chris@127:             scrollables.push_back(*i);
Chris@127:         } else {
Chris@127:             metUnscrollable = true;
Chris@127:         }
Chris@127:     }
Chris@127: 
Chris@127:     if (testChanged && scrollables != m_lastScrollableBackLayers) {
Chris@127: 	m_lastScrollableBackLayers = scrollables;
Chris@127: 	changed = true;
Chris@127:     }
Chris@127:     return scrollables;
Chris@127: }
Chris@127: 
Chris@127: View::LayerList
Chris@127: View::getNonScrollableFrontLayers(bool testChanged, bool &changed) const
Chris@127: {
Chris@127:     changed = false;
Chris@127:     LayerList nonScrollables;
Chris@127: 
Chris@127:     // Everything in front of the first non-scrollable from the back
Chris@127:     // should also be considered non-scrollable
Chris@127: 
Chris@127:     bool started = false;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 	if ((*i)->isLayerDormant(this)) continue;
Chris@127: 	if (!started && (*i)->isLayerScrollable(this)) {
Chris@127: 	    continue;
Chris@127: 	}
Chris@127: 	started = true;
Chris@127: 	if ((*i)->isLayerOpaque()) {
Chris@127: 	    // You can't see anything behind an opaque layer!
Chris@127: 	    nonScrollables.clear();
Chris@127: 	}
Chris@127: 	nonScrollables.push_back(*i);
Chris@127:     }
Chris@127: 
Chris@127:     if (testChanged && nonScrollables != m_lastNonScrollableBackLayers) {
Chris@127: 	m_lastNonScrollableBackLayers = nonScrollables;
Chris@127: 	changed = true;
Chris@127:     }
Chris@127: 
Chris@127:     return nonScrollables;
Chris@127: }
Chris@127: 
Chris@127: size_t
Chris@127: View::getZoomConstraintBlockSize(size_t blockSize,
Chris@127: 				 ZoomConstraint::RoundingDirection dir)
Chris@127:     const
Chris@127: {
Chris@127:     size_t candidate = blockSize;
Chris@127:     bool haveCandidate = false;
Chris@127: 
Chris@127:     PowerOfSqrtTwoZoomConstraint defaultZoomConstraint;
Chris@127: 
Chris@127:     for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) {
Chris@127: 
Chris@127: 	const ZoomConstraint *zoomConstraint = (*i)->getZoomConstraint();
Chris@127: 	if (!zoomConstraint) zoomConstraint = &defaultZoomConstraint;
Chris@127: 
Chris@127: 	size_t thisBlockSize =
Chris@127: 	    zoomConstraint->getNearestBlockSize(blockSize, dir);
Chris@127: 
Chris@127: 	// Go for the block size that's furthest from the one
Chris@127: 	// passed in.  Most of the time, that's what we want.
Chris@127: 	if (!haveCandidate ||
Chris@127: 	    (thisBlockSize > blockSize && thisBlockSize > candidate) ||
Chris@127: 	    (thisBlockSize < blockSize && thisBlockSize < candidate)) {
Chris@127: 	    candidate = thisBlockSize;
Chris@127: 	    haveCandidate = true;
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     return candidate;
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::zoom(bool in)
Chris@127: {
Chris@127:     int newZoomLevel = m_zoomLevel;
Chris@127: 
Chris@127:     if (in) {
Chris@127: 	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel - 1, 
Chris@127: 						  ZoomConstraint::RoundDown);
Chris@127:     } else {
Chris@127: 	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel + 1,
Chris@127: 						  ZoomConstraint::RoundUp);
Chris@127:     }
Chris@127: 
Chris@127:     if (newZoomLevel != m_zoomLevel) {
Chris@127: 	setZoomLevel(newZoomLevel);
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::scroll(bool right, bool lots)
Chris@127: {
Chris@127:     long delta;
Chris@127:     if (lots) {
Chris@127: 	delta = (getEndFrame() - getStartFrame()) / 2;
Chris@127:     } else {
Chris@127: 	delta = (getEndFrame() - getStartFrame()) / 20;
Chris@127:     }
Chris@127:     if (right) delta = -delta;
Chris@127: 
Chris@127:     if (int(m_centreFrame) < delta) {
Chris@127: 	setCentreFrame(0);
Chris@127:     } else if (int(m_centreFrame) - delta >= int(getModelsEndFrame())) {
Chris@127: 	setCentreFrame(getModelsEndFrame());
Chris@127:     } else {
Chris@127: 	setCentreFrame(m_centreFrame - delta);
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::checkProgress(void *object)
Chris@127: {
Chris@127:     if (!m_showProgress) return;
Chris@127: 
Chris@127:     int ph = height();
Chris@127: 
Chris@127:     for (ProgressMap::const_iterator i = m_progressBars.begin();
Chris@127: 	 i != m_progressBars.end(); ++i) {
Chris@127: 
Chris@127: 	if (i->first == object) {
Chris@127: 
Chris@127: 	    int completion = i->first->getCompletion(this);
Chris@127: 
Chris@127: 	    if (completion >= 100) {
Chris@127: 
Chris@127: 		i->second->hide();
Chris@127: 
Chris@127: 	    } else {
Chris@127: 
Chris@127: 		i->second->setText(i->first->getPropertyContainerName());
Chris@132: 
Chris@127: 		i->second->setValue(completion);
Chris@127: 		i->second->move(0, ph - i->second->height());
Chris@127: 
Chris@127: 		i->second->show();
Chris@127: 		i->second->update();
Chris@127: 
Chris@127: 		ph -= i->second->height();
Chris@127: 	    }
Chris@127: 	} else {
Chris@127: 	    if (i->second->isVisible()) {
Chris@127: 		ph -= i->second->height();
Chris@127: 	    }
Chris@127: 	}
Chris@127:     }
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::paintEvent(QPaintEvent *e)
Chris@127: {
Chris@127: //    Profiler prof("View::paintEvent", false);
Chris@127: //    std::cerr << "View::paintEvent" << std::endl;
Chris@127: 
Chris@127:     if (m_layers.empty()) {
Chris@127: 	QFrame::paintEvent(e);
Chris@127: 	return;
Chris@127:     }
Chris@127: 
Chris@127:     // ensure our constraints are met
Chris@137: 
Chris@137: /*!!! Should we do this only if we have layers that can't support other
Chris@137:   zoom levels?
Chris@137: 
Chris@127:     m_zoomLevel = getZoomConstraintBlockSize(m_zoomLevel,
Chris@127: 					     ZoomConstraint::RoundUp);
Chris@137: */
Chris@127: 
Chris@127:     QPainter paint;
Chris@127:     bool repaintCache = false;
Chris@127:     bool paintedCacheRect = false;
Chris@127: 
Chris@127:     QRect cacheRect(rect());
Chris@127: 
Chris@127:     if (e) {
Chris@127: 	cacheRect &= e->rect();
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	std::cerr << "paint rect " << cacheRect.width() << "x" << cacheRect.height()
Chris@127: 		  << ", my rect " << width() << "x" << height() << std::endl;
Chris@127: #endif
Chris@127:     }
Chris@127: 
Chris@127:     QRect nonCacheRect(cacheRect);
Chris@127: 
Chris@127:     // If not all layers are scrollable, but some of the back layers
Chris@127:     // are, we should store only those in the cache.
Chris@127: 
Chris@127:     bool layersChanged = false;
Chris@127:     LayerList scrollables = getScrollableBackLayers(true, layersChanged);
Chris@127:     LayerList nonScrollables = getNonScrollableFrontLayers(true, layersChanged);
Chris@127:     bool selectionCacheable = nonScrollables.empty();
Chris@127:     bool haveSelections = m_manager && !m_manager->getSelections().empty();
Chris@127:     bool selectionDrawn = false;
Chris@127: 
Chris@127:     // If all the non-scrollable layers are non-opaque, then we draw
Chris@127:     // the selection rectangle behind them and cache it.  If any are
Chris@127:     // opaque, however, we can't cache.
Chris@127:     //
Chris@127:     if (!selectionCacheable) {
Chris@127: 	selectionCacheable = true;
Chris@127: 	for (LayerList::const_iterator i = nonScrollables.begin();
Chris@127: 	     i != nonScrollables.end(); ++i) {
Chris@127: 	    if ((*i)->isLayerOpaque()) {
Chris@127: 		selectionCacheable = false;
Chris@127: 		break;
Chris@127: 	    }
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     if (selectionCacheable) {
Chris@127: 	QPoint localPos;
Chris@127: 	bool closeToLeft, closeToRight;
Chris@127: 	if (shouldIlluminateLocalSelection(localPos, closeToLeft, closeToRight)) {
Chris@127: 	    selectionCacheable = false;
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127:     std::cerr << "View(" << this << ")::paintEvent: have " << scrollables.size()
Chris@127: 	      << " scrollable back layers and " << nonScrollables.size()
Chris@127: 	      << " non-scrollable front layers" << std::endl;
Chris@127:     std::cerr << "haveSelections " << haveSelections << ", selectionCacheable "
Chris@127: 	      << selectionCacheable << ", m_selectionCached " << m_selectionCached << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127:     if (layersChanged || scrollables.empty() ||
Chris@127: 	(haveSelections && (selectionCacheable != m_selectionCached))) {
Chris@127: 	delete m_cache;
Chris@127: 	m_cache = 0;
Chris@127: 	m_selectionCached = false;
Chris@127:     }
Chris@127: 
Chris@127:     if (!scrollables.empty()) {
Chris@127: 	if (!m_cache ||
Chris@127: 	    m_cacheZoomLevel != m_zoomLevel ||
Chris@127: 	    width() != m_cache->width() ||
Chris@127: 	    height() != m_cache->height()) {
Chris@127: 
Chris@127: 	    // cache is not valid
Chris@127: 
Chris@127: 	    if (cacheRect.width() < width()/10) {
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 		std::cerr << "View(" << this << ")::paintEvent: small repaint, not bothering to recreate cache" << std::endl;
Chris@127: #endif
Chris@127: 	    } else {
Chris@127: 		delete m_cache;
Chris@127: 		m_cache = new QPixmap(width(), height());
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 		std::cerr << "View(" << this << ")::paintEvent: recreated cache" << std::endl;
Chris@127: #endif
Chris@127: 		cacheRect = rect();
Chris@127: 		repaintCache = true;
Chris@127: 	    }
Chris@127: 
Chris@127: 	} else if (m_cacheCentreFrame != m_centreFrame) {
Chris@127: 
Chris@127: 	    long dx =
Chris@127: 		getXForFrame(m_cacheCentreFrame) -
Chris@127: 		getXForFrame(m_centreFrame);
Chris@127: 
Chris@127: 	    if (dx > -width() && dx < width()) {
Chris@127: #if defined(Q_WS_WIN32) || defined(Q_WS_MAC)
Chris@127: 		// Copying a pixmap to itself doesn't work properly on Windows
Chris@127: 		// or Mac (it only works when moving in one direction)
Chris@127: 		static QPixmap *tmpPixmap = 0;
Chris@127: 		if (!tmpPixmap ||
Chris@127: 		    tmpPixmap->width() != width() ||
Chris@127: 		    tmpPixmap->height() != height()) {
Chris@127: 		    delete tmpPixmap;
Chris@127: 		    tmpPixmap = new QPixmap(width(), height());
Chris@127: 		}
Chris@127: 		paint.begin(tmpPixmap);
Chris@127: 		paint.drawPixmap(0, 0, *m_cache);
Chris@127: 		paint.end();
Chris@127: 		paint.begin(m_cache);
Chris@127: 		paint.drawPixmap(dx, 0, *tmpPixmap);
Chris@127: 		paint.end();
Chris@127: #else
Chris@127: 		// But it seems to be fine on X11
Chris@127: 		paint.begin(m_cache);
Chris@127: 		paint.drawPixmap(dx, 0, *m_cache);
Chris@127: 		paint.end();
Chris@127: #endif
Chris@127: 
Chris@127: 		if (dx < 0) {
Chris@127: 		    cacheRect = QRect(width() + dx, 0, -dx, height());
Chris@127: 		} else {
Chris@127: 		    cacheRect = QRect(0, 0, dx, height());
Chris@127: 		}
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 		std::cerr << "View(" << this << ")::paintEvent: scrolled cache by " << dx << std::endl;
Chris@127: #endif
Chris@127: 	    } else {
Chris@127: 		cacheRect = rect();
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 		std::cerr << "View(" << this << ")::paintEvent: scrolling too far" << std::endl;
Chris@127: #endif
Chris@127: 	    }
Chris@127: 	    repaintCache = true;
Chris@127: 
Chris@127: 	} else {
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	    std::cerr << "View(" << this << ")::paintEvent: cache is good" << std::endl;
Chris@127: #endif
Chris@127: 	    paint.begin(this);
Chris@127: 	    paint.drawPixmap(cacheRect, *m_cache, cacheRect);
Chris@127: 	    paint.end();
Chris@127: 	    QFrame::paintEvent(e);
Chris@127: 	    paintedCacheRect = true;
Chris@127: 	}
Chris@127: 
Chris@127: 	m_cacheCentreFrame = m_centreFrame;
Chris@127: 	m_cacheZoomLevel = m_zoomLevel;
Chris@127:     }
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: //    std::cerr << "View(" << this << ")::paintEvent: cacheRect " << cacheRect << ", nonCacheRect " << (nonCacheRect | cacheRect) << ", repaintCache " << repaintCache << ", paintedCacheRect " << paintedCacheRect << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127:     // Scrollable (cacheable) items first
Chris@127: 
Chris@127:     if (!paintedCacheRect) {
Chris@127: 
Chris@127: 	if (repaintCache) paint.begin(m_cache);
Chris@127: 	else paint.begin(this);
Chris@127: 
Chris@127: 	paint.setClipRect(cacheRect);
Chris@127: 	
Chris@127: 	if (hasLightBackground()) {
Chris@127: 	    paint.setPen(Qt::white);
Chris@127: 	    paint.setBrush(Qt::white);
Chris@127: 	} else {
Chris@127: 	    paint.setPen(Qt::black);
Chris@127: 	    paint.setBrush(Qt::black);
Chris@127: 	}
Chris@127: 	paint.drawRect(cacheRect);
Chris@127: 
Chris@127: 	paint.setPen(Qt::black);
Chris@127: 	paint.setBrush(Qt::NoBrush);
Chris@127: 	
Chris@127: 	for (LayerList::iterator i = scrollables.begin(); i != scrollables.end(); ++i) {
Chris@127: 	    paint.setRenderHint(QPainter::Antialiasing, false);
Chris@127: 	    paint.save();
Chris@127: 	    (*i)->paint(this, paint, cacheRect);
Chris@127: 	    paint.restore();
Chris@127: 	}
Chris@127: 
Chris@127: 	if (haveSelections && selectionCacheable) {
Chris@127: 	    drawSelections(paint);
Chris@127: 	    m_selectionCached = repaintCache;
Chris@127: 	    selectionDrawn = true;
Chris@127: 	}
Chris@127: 	
Chris@127: 	paint.end();
Chris@127: 
Chris@127: 	if (repaintCache) {
Chris@127: 	    cacheRect |= (e ? e->rect() : rect());
Chris@127: 	    paint.begin(this);
Chris@127: 	    paint.drawPixmap(cacheRect, *m_cache, cacheRect);
Chris@127: 	    paint.end();
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     // Now non-cacheable items.  We always need to redraw the
Chris@127:     // non-cacheable items across at least the area we drew of the
Chris@127:     // cacheable items.
Chris@127: 
Chris@127:     nonCacheRect |= cacheRect;
Chris@127: 
Chris@127:     paint.begin(this);
Chris@127:     paint.setClipRect(nonCacheRect);
Chris@127: 
Chris@127:     if (scrollables.empty()) {
Chris@127: 	if (hasLightBackground()) {
Chris@127: 	    paint.setPen(Qt::white);
Chris@127: 	    paint.setBrush(Qt::white);
Chris@127: 	} else {
Chris@127: 	    paint.setPen(Qt::black);
Chris@127: 	    paint.setBrush(Qt::black);
Chris@127: 	}
Chris@127: 	paint.drawRect(nonCacheRect);
Chris@127:     }
Chris@127: 	
Chris@127:     paint.setPen(Qt::black);
Chris@127:     paint.setBrush(Qt::NoBrush);
Chris@127: 	
Chris@127:     for (LayerList::iterator i = nonScrollables.begin(); i != nonScrollables.end(); ++i) {
Chris@127: //        Profiler profiler2("View::paintEvent non-cacheable");
Chris@127: 	(*i)->paint(this, paint, nonCacheRect);
Chris@127:     }
Chris@127: 	
Chris@127:     paint.end();
Chris@127: 
Chris@127:     paint.begin(this);
Chris@127:     if (e) paint.setClipRect(e->rect());
Chris@127:     if (!m_selectionCached) {
Chris@127: 	drawSelections(paint);
Chris@127:     }
Chris@127:     paint.end();
Chris@127: 
Chris@127:     if (m_followPlay != PlaybackScrollContinuous) {
Chris@127: 
Chris@127: 	paint.begin(this);
Chris@127: 
Chris@127: 	if (long(m_playPointerFrame) > getStartFrame() &&
Chris@127: 	    m_playPointerFrame < getEndFrame()) {
Chris@127: 
Chris@127: 	    int playx = getXForFrame(m_playPointerFrame);
Chris@127: 
Chris@127: 	    paint.setPen(Qt::black);
Chris@127: 	    paint.drawLine(playx - 1, 0, playx - 1, height() - 1);
Chris@127: 	    paint.drawLine(playx + 1, 0, playx + 1, height() - 1);
Chris@127: 	    paint.drawPoint(playx, 0);
Chris@127: 	    paint.drawPoint(playx, height() - 1);
Chris@127: 	    paint.setPen(Qt::white);
Chris@127: 	    paint.drawLine(playx, 1, playx, height() - 2);
Chris@127: 	}
Chris@127: 
Chris@127: 	paint.end();
Chris@127:     }
Chris@127: 
Chris@127:     QFrame::paintEvent(e);
Chris@127: }
Chris@127: 
Chris@127: void
Chris@127: View::drawSelections(QPainter &paint)
Chris@127: {
Chris@127:     MultiSelection::SelectionList selections;
Chris@127: 
Chris@127:     if (m_manager) {
Chris@127: 	selections = m_manager->getSelections();
Chris@127: 	if (m_manager->haveInProgressSelection()) {
Chris@127: 	    bool exclusive;
Chris@127: 	    Selection inProgressSelection =
Chris@127: 		m_manager->getInProgressSelection(exclusive);
Chris@127: 	    if (exclusive) selections.clear();
Chris@127: 	    selections.insert(inProgressSelection);
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     paint.save();
Chris@127:     paint.setBrush(QColor(150, 150, 255, 80));
Chris@127: 
Chris@127:     int sampleRate = getModelsSampleRate();
Chris@127: 
Chris@127:     QPoint localPos;
Chris@127:     long illuminateFrame = -1;
Chris@127:     bool closeToLeft, closeToRight;
Chris@127: 
Chris@127:     if (shouldIlluminateLocalSelection(localPos, closeToLeft, closeToRight)) {
Chris@127: 	illuminateFrame = getFrameForX(localPos.x());
Chris@127:     }
Chris@127: 
Chris@127:     const QFontMetrics &metrics = paint.fontMetrics();
Chris@127: 
Chris@127:     for (MultiSelection::SelectionList::iterator i = selections.begin();
Chris@127: 	 i != selections.end(); ++i) {
Chris@127: 
Chris@127: 	int p0 = getXForFrame(i->getStartFrame());
Chris@127: 	int p1 = getXForFrame(i->getEndFrame());
Chris@127: 
Chris@127: 	if (p1 < 0 || p0 > width()) continue;
Chris@127: 
Chris@127: #ifdef DEBUG_VIEW_WIDGET_PAINT
Chris@127: 	std::cerr << "View::drawSelections: " << p0 << ",-1 [" << (p1-p0) << "x" << (height()+1) << "]" << std::endl;
Chris@127: #endif
Chris@127: 
Chris@127: 	bool illuminateThis =
Chris@127: 	    (illuminateFrame >= 0 && i->contains(illuminateFrame));
Chris@127: 
Chris@127: 	paint.setPen(QColor(150, 150, 255));
Chris@127: 	paint.drawRect(p0, -1, p1 - p0, height() + 1);
Chris@127: 
Chris@127: 	if (illuminateThis) {
Chris@127: 	    paint.save();
Chris@127: 	    if (hasLightBackground()) {
Chris@127: 		paint.setPen(QPen(Qt::black, 2));
Chris@127: 	    } else {
Chris@127: 		paint.setPen(QPen(Qt::white, 2));
Chris@127: 	    }
Chris@127: 	    if (closeToLeft) {
Chris@127: 		paint.drawLine(p0, 1, p1, 1);
Chris@127: 		paint.drawLine(p0, 0, p0, height());
Chris@127: 		paint.drawLine(p0, height() - 1, p1, height() - 1);
Chris@127: 	    } else if (closeToRight) {
Chris@127: 		paint.drawLine(p0, 1, p1, 1);
Chris@127: 		paint.drawLine(p1, 0, p1, height());
Chris@127: 		paint.drawLine(p0, height() - 1, p1, height() - 1);
Chris@127: 	    } else {
Chris@127: 		paint.setBrush(Qt::NoBrush);
Chris@127: 		paint.drawRect(p0, 1, p1 - p0, height() - 2);
Chris@127: 	    }
Chris@127: 	    paint.restore();
Chris@127: 	}
Chris@127: 
Chris@127: 	if (sampleRate && shouldLabelSelections() && m_manager &&
Chris@127:             m_manager->getOverlayMode() != ViewManager::NoOverlays) {
Chris@127: 	    
Chris@127: 	    QString startText = QString("%1 / %2")
Chris@127: 		.arg(QString::fromStdString
Chris@127: 		     (RealTime::frame2RealTime
Chris@127: 		      (i->getStartFrame(), sampleRate).toText(true)))
Chris@127: 		.arg(i->getStartFrame());
Chris@127: 	    
Chris@127: 	    QString endText = QString(" %1 / %2")
Chris@127: 		.arg(QString::fromStdString
Chris@127: 		     (RealTime::frame2RealTime
Chris@127: 		      (i->getEndFrame(), sampleRate).toText(true)))
Chris@127: 		.arg(i->getEndFrame());
Chris@127: 	    
Chris@127: 	    QString durationText = QString("(%1 / %2) ")
Chris@127: 		.arg(QString::fromStdString
Chris@127: 		     (RealTime::frame2RealTime
Chris@127: 		      (i->getEndFrame() - i->getStartFrame(), sampleRate)
Chris@127: 		      .toText(true)))
Chris@127: 		.arg(i->getEndFrame() - i->getStartFrame());
Chris@127: 
Chris@127: 	    int sw = metrics.width(startText),
Chris@127: 		ew = metrics.width(endText),
Chris@127: 		dw = metrics.width(durationText);
Chris@127: 
Chris@127: 	    int sy = metrics.ascent() + metrics.height() + 4;
Chris@127: 	    int ey = sy;
Chris@127: 	    int dy = sy + metrics.height();
Chris@127: 
Chris@127: 	    int sx = p0 + 2;
Chris@127: 	    int ex = sx;
Chris@127: 	    int dx = sx;
Chris@127: 
Chris@127: 	    if (sw + ew > (p1 - p0)) {
Chris@127: 		ey += metrics.height();
Chris@127: 		dy += metrics.height();
Chris@127: 	    }
Chris@127: 
Chris@127: 	    if (ew < (p1 - p0)) {
Chris@127: 		ex = p1 - 2 - ew;
Chris@127: 	    }
Chris@127: 
Chris@127: 	    if (dw < (p1 - p0)) {
Chris@127: 		dx = p1 - 2 - dw;
Chris@127: 	    }
Chris@127: 
Chris@127: 	    paint.drawText(sx, sy, startText);
Chris@127: 	    paint.drawText(ex, ey, endText);
Chris@127: 	    paint.drawText(dx, dy, durationText);
Chris@127: 	}
Chris@127:     }
Chris@127: 
Chris@127:     paint.restore();
Chris@127: }
Chris@127: 
Chris@127: QString
Chris@127: View::toXmlString(QString indent, QString extraAttributes) const
Chris@127: {
Chris@127:     QString s;
Chris@127: 
Chris@127:     s += indent;
Chris@127: 
Chris@127:     s += QString("<view "
Chris@127: 		 "centre=\"%1\" "
Chris@127: 		 "zoom=\"%2\" "
Chris@127: 		 "followPan=\"%3\" "
Chris@127: 		 "followZoom=\"%4\" "
Chris@127: 		 "tracking=\"%5\" "
Chris@127: 		 "light=\"%6\" %7>\n")
Chris@127: 	.arg(m_centreFrame)
Chris@127: 	.arg(m_zoomLevel)
Chris@127: 	.arg(m_followPan)
Chris@127: 	.arg(m_followZoom)
Chris@127: 	.arg(m_followPlay == PlaybackScrollContinuous ? "scroll" :
Chris@127: 	     m_followPlay == PlaybackScrollPage ? "page" : "ignore")
Chris@127: 	.arg(m_lightBackground)
Chris@127: 	.arg(extraAttributes);
Chris@127: 
Chris@127:     for (size_t i = 0; i < m_layers.size(); ++i) {
Chris@127: 	s += m_layers[i]->toXmlString(indent + "  ");
Chris@127:     }
Chris@127: 
Chris@127:     s += indent + "</view>\n";
Chris@127: 
Chris@127:     return s;
Chris@127: }
Chris@127: 
Chris@127: ViewPropertyContainer::ViewPropertyContainer(View *v) :
Chris@127:     m_v(v)
Chris@127: {
Chris@127:     connect(m_v, SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
Chris@127: 	    this, SIGNAL(propertyChanged(PropertyContainer::PropertyName)));
Chris@127: }
Chris@127: 
Chris@127: #ifdef INCLUDE_MOCFILES
Chris@127: #include "View.moc.cpp"
Chris@127: #endif
Chris@127: