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@0:     Chris Cannam, Queen Mary University of London, 2005
Chris@0:     
Chris@0:     This is experimental software.  Not for distribution.
Chris@0: */
Chris@0: 
Chris@0: #include "widgets/Pane.h"
Chris@0: #include "base/Layer.h"
Chris@0: #include "base/Model.h"
Chris@0: #include "base/ZoomConstraint.h"
Chris@0: #include "base/RealTime.h"
Chris@0: #include "base/Profiler.h"
Chris@0: 
Chris@0: #include <QPaintEvent>
Chris@0: #include <QPainter>
Chris@0: #include <iostream>
Chris@0: #include <cmath>
Chris@0: 
Chris@0: using std::cerr;
Chris@0: using std::endl;
Chris@0: 
Chris@0: Pane::Pane(QWidget *w) :
Chris@0:     View(w, true),
Chris@0:     m_identifyFeatures(false),
Chris@0:     m_clickedInRange(false),
Chris@0:     m_shiftPressed(false),
Chris@0:     m_centreLineVisible(true)
Chris@0: {
Chris@0:     setObjectName("Pane");
Chris@0:     setMouseTracking(true);
Chris@0: }
Chris@0: 
Chris@0: bool
Chris@0: Pane::shouldIlluminateLocalFeatures(const Layer *layer, QPoint &pos)
Chris@0: {
Chris@0:     for (LayerList::iterator vi = m_layers.end(); vi != m_layers.begin(); ) {
Chris@0: 	--vi;
Chris@0: 	if (layer != *vi) return false;
Chris@0: 	pos = m_identifyPoint;
Chris@0: 	return m_identifyFeatures;
Chris@0:     }
Chris@0: 
Chris@0:     return false;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::setCentreLineVisible(bool visible)
Chris@0: {
Chris@0:     m_centreLineVisible = visible;
Chris@0:     update();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::paintEvent(QPaintEvent *e)
Chris@0: {
Chris@0:     QPainter paint;
Chris@0: 
Chris@0:     QRect r(rect());
Chris@0: 
Chris@0:     if (e) {
Chris@0: 	r = e->rect();
Chris@0:     }
Chris@0: /*
Chris@0:     paint.begin(this);
Chris@0:     paint.setClipRect(r);
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(r);
Chris@0: 
Chris@0:     paint.end();
Chris@0: */
Chris@0:     View::paintEvent(e);
Chris@0: 
Chris@0:     paint.begin(this);
Chris@0: 
Chris@0:     if (e) {
Chris@0: 	paint.setClipRect(r);
Chris@0:     }
Chris@0: 	
Chris@0:     for (LayerList::iterator vi = m_layers.end(); vi != m_layers.begin(); ) {
Chris@0: 	--vi;
Chris@0: 
Chris@0: 	int sw = (*vi)->getVerticalScaleWidth(paint);
Chris@0: 
Chris@0: 	if (sw > 0 && r.left() < sw) {
Chris@0: 
Chris@0: //	    Profiler profiler("Pane::paintEvent - painting vertical scale", true);
Chris@0: 
Chris@0: //	    std::cerr << "Pane::paintEvent: calling paint.save() in vertical scale block" << std::endl;
Chris@0: 	    paint.save();
Chris@0: 
Chris@0: 	    paint.setPen(Qt::black);
Chris@0: 	    paint.setBrush(Qt::white);
Chris@0: 	    paint.drawRect(0, 0, sw, height());
Chris@0: 
Chris@0: 	    paint.setBrush(Qt::NoBrush);
Chris@0: 	    (*vi)->paintVerticalScale(paint, QRect(0, 0, sw, height()));
Chris@0: 
Chris@0: 	    paint.restore();
Chris@0: 	}
Chris@0: 
Chris@0: 	if (m_identifyFeatures) {
Chris@0: 	    QRect descRect = (*vi)->getFeatureDescriptionRect(paint,
Chris@0: 							      m_identifyPoint);
Chris@0: 	    if (descRect.width() > 0 && descRect.height() > 0 &&
Chris@0: 		r.left() + r.width() >= width() - descRect.width() &&
Chris@0: 		r.top() < descRect.height()) {
Chris@0: 		
Chris@0: //		Profiler profiler("Pane::paintEvent - painting local feature description", true);
Chris@0: 		
Chris@0: //		std::cerr << "Pane::paintEvent: calling paint.save() in feature description block" << std::endl;
Chris@0: 		paint.save();
Chris@0: 		
Chris@0: 		paint.setPen(Qt::black);
Chris@0: 		paint.setBrush(Qt::white);
Chris@0: 		
Chris@0: 		QRect rect(width() - descRect.width() - 1, 0,
Chris@0: 			   descRect.width(), descRect.height());
Chris@0: 		
Chris@0: 		paint.drawRect(rect);
Chris@0: 		
Chris@0: 		paint.setBrush(Qt::NoBrush);
Chris@0: 		(*vi)->paintLocalFeatureDescription(paint, rect, m_identifyPoint);
Chris@0: 		
Chris@0: 		paint.restore();
Chris@0: 	    }
Chris@0: 	}
Chris@0: 
Chris@0: 	break;
Chris@0:     }
Chris@0:     
Chris@0:     if (m_centreLineVisible) {
Chris@0: 
Chris@0: 	if (hasLightBackground()) {
Chris@0: 	    paint.setPen(QColor(50, 50, 50));
Chris@0: 	} else {
Chris@0: 	    paint.setPen(QColor(200, 200, 200));
Chris@0: 	}	
Chris@0: 	paint.setBrush(Qt::NoBrush);
Chris@0: 	paint.drawLine(width() / 2, 0, width() / 2, height() - 1);
Chris@0: 	
Chris@0: //    QFont font(paint.font());
Chris@0: //    font.setBold(true);
Chris@0: //    paint.setFont(font);
Chris@0: 
Chris@0: 	int sampleRate = getModelsSampleRate();
Chris@0: 	int y = height() - paint.fontMetrics().height()
Chris@0: 	    + paint.fontMetrics().ascent() - 6;
Chris@0: 	
Chris@0: 	LayerList::iterator vi = m_layers.end();
Chris@0: 	
Chris@0: 	if (vi != m_layers.begin()) {
Chris@0: 	    
Chris@0: 	    switch ((*--vi)->getPreferredFrameCountPosition()) {
Chris@0: 		
Chris@0: 	    case Layer::PositionTop:
Chris@0: 		y = paint.fontMetrics().ascent() + 6;
Chris@0: 		break;
Chris@0: 		
Chris@0: 	    case Layer::PositionMiddle:
Chris@0: 		y = (height() - paint.fontMetrics().height()) / 2
Chris@0: 		    + paint.fontMetrics().ascent();
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case Layer::PositionBottom:
Chris@0: 		// y already set correctly
Chris@0: 		break;
Chris@0: 	    }
Chris@0: 	}
Chris@0: 
Chris@0: 	if (sampleRate) {
Chris@0: 
Chris@0: 	    QString text(QString::fromStdString
Chris@0: 			 (RealTime::frame2RealTime
Chris@0: 			  (m_centreFrame, sampleRate).toText(true)));
Chris@0: 
Chris@0: 	    int tw = paint.fontMetrics().width(text);
Chris@0: 	    int x = width()/2 - 4 - tw;
Chris@0: 
Chris@0: 	    if (hasLightBackground()) {
Chris@0: 		paint.setPen(palette().background().color());
Chris@0: 		for (int dx = -1; dx <= 1; ++dx) {
Chris@0: 		    for (int dy = -1; dy <= 1; ++dy) {
Chris@0: 			if ((dx && dy) || !(dx || dy)) continue;
Chris@0: 			paint.drawText(x + dx, y + dy, text);
Chris@0: 		    }
Chris@0: 		}
Chris@0: 		paint.setPen(QColor(50, 50, 50));
Chris@0: 	    } else {
Chris@0: 		paint.setPen(QColor(200, 200, 200));
Chris@0: 	    }
Chris@0: 
Chris@0: 	    paint.drawText(x, y, text);
Chris@0: 	}
Chris@0: 
Chris@0: 	QString text = QString("%1").arg(m_centreFrame);
Chris@0: 
Chris@0: 	int tw = paint.fontMetrics().width(text);
Chris@0: 	int x = width()/2 + 4;
Chris@0:     
Chris@0: 	if (hasLightBackground()) {
Chris@0: 	    paint.setPen(palette().background().color());
Chris@0: 	    for (int dx = -1; dx <= 1; ++dx) {
Chris@0: 		for (int dy = -1; dy <= 1; ++dy) {
Chris@0: 		    if ((dx && dy) || !(dx || dy)) continue;
Chris@0: 		    paint.drawText(x + dx, y + dy, text);
Chris@0: 		}
Chris@0: 	    }
Chris@0: 	    paint.setPen(QColor(50, 50, 50));
Chris@0: 	} else {
Chris@0: 	    paint.setPen(QColor(200, 200, 200));
Chris@0: 	}
Chris@0: 	paint.drawText(x, y, text);
Chris@0:     }
Chris@0: 
Chris@0:     if (m_clickedInRange && m_shiftPressed) {
Chris@0: 	paint.setPen(Qt::blue);
Chris@0: 	paint.drawRect(m_clickPos.x(), m_clickPos.y(),
Chris@0: 		       m_mousePos.x() - m_clickPos.x(),
Chris@0: 		       m_mousePos.y() - m_clickPos.y());
Chris@0:     }
Chris@0:     
Chris@0:     paint.end();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mousePressEvent(QMouseEvent *e)
Chris@0: {
Chris@0:     m_clickPos = e->pos();
Chris@0:     m_clickedInRange = true;
Chris@0:     m_shiftPressed = (e->modifiers() & Qt::ShiftModifier);
Chris@0:     m_dragCentreFrame = m_centreFrame;
Chris@0: 
Chris@0:     emit paneInteractedWith();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mouseReleaseEvent(QMouseEvent *e)
Chris@0: {
Chris@0:     if (m_clickedInRange) {
Chris@0: 	mouseMoveEvent(e);
Chris@0:     }
Chris@0:     if (m_shiftPressed) {
Chris@0: 
Chris@0: 	int x0 = std::min(m_clickPos.x(), m_mousePos.x());
Chris@0: 	int x1 = std::max(m_clickPos.x(), m_mousePos.x());
Chris@0: 	int w = x1 - x0;
Chris@0: 
Chris@0: 	long newStartFrame = getStartFrame() + m_zoomLevel * x0;
Chris@0: 
Chris@0: 	if (newStartFrame <= -long(width() * m_zoomLevel)) {
Chris@0: 	    newStartFrame  = -long(width() * m_zoomLevel) + 1;
Chris@0: 	}
Chris@0: 
Chris@0: 	if (newStartFrame >= long(getModelsEndFrame())) {
Chris@0: 	    newStartFrame  = getModelsEndFrame() - 1;
Chris@0: 	}
Chris@0: 
Chris@0: 	float ratio = float(w) / float(width());
Chris@0: //	std::cerr << "ratio: " << ratio << std::endl;
Chris@0: 	size_t newZoomLevel = (size_t)nearbyint(m_zoomLevel * ratio);
Chris@0: 	if (newZoomLevel < 1) newZoomLevel = 1;
Chris@0: 
Chris@0: //	std::cerr << "start: " << m_startFrame << ", level " << m_zoomLevel << std::endl;
Chris@0: 	setZoomLevel(getZoomConstraintBlockSize(newZoomLevel));
Chris@0: 	setStartFrame(newStartFrame);
Chris@0: 
Chris@0: 	//cerr << "mouseReleaseEvent: start frame now " << m_startFrame << endl;
Chris@0: //	update();
Chris@0:     }
Chris@0:     m_clickedInRange = false;
Chris@0: 
Chris@0:     emit paneInteractedWith();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mouseMoveEvent(QMouseEvent *e)
Chris@0: {
Chris@0:     if (!m_clickedInRange) {
Chris@0: 	
Chris@0: //	std::cerr << "Pane: calling identifyLocalFeatures" << std::endl;
Chris@0: 
Chris@0: //!!!	identifyLocalFeatures(true, e->x(), e->y());
Chris@0: 
Chris@0: 	bool previouslyIdentifying = m_identifyFeatures;
Chris@0: 	QPoint prevPoint = m_identifyPoint;
Chris@0: 
Chris@0: 	m_identifyFeatures = true;
Chris@0: 	m_identifyPoint = e->pos();
Chris@0: 
Chris@0: 	if (m_identifyFeatures != previouslyIdentifying ||
Chris@0: 	    m_identifyPoint != prevPoint) {
Chris@0: 	    update();
Chris@0: 	}
Chris@0: 
Chris@0:     } else if (m_shiftPressed) {
Chris@0: 
Chris@0: 	m_mousePos = e->pos();
Chris@0: 	update();
Chris@0: 
Chris@0:     } else {
Chris@0: 
Chris@0: 	long xoff = int(e->x()) - int(m_clickPos.x());
Chris@0: 	long frameOff = xoff * m_zoomLevel;
Chris@0: 
Chris@0: 	size_t newCentreFrame = m_dragCentreFrame;
Chris@0: 	
Chris@0: 	if (frameOff < 0) {
Chris@0: 	    newCentreFrame -= frameOff;
Chris@0: 	} else if (newCentreFrame >= size_t(frameOff)) {
Chris@0: 	    newCentreFrame -= frameOff;
Chris@0: 	} else {
Chris@0: 	    newCentreFrame = 0;
Chris@0: 	}
Chris@0: 
Chris@0: 	if (newCentreFrame >= getModelsEndFrame()) {
Chris@0: 	    newCentreFrame = getModelsEndFrame();
Chris@0: 	    if (newCentreFrame > 0) --newCentreFrame;
Chris@0: 	}
Chris@0: 
Chris@0: 	if (std::max(m_centreFrame, newCentreFrame) -
Chris@0: 	    std::min(m_centreFrame, newCentreFrame) > size_t(m_zoomLevel)) {
Chris@0: 	    setCentreFrame(newCentreFrame);
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mouseDoubleClickEvent(QMouseEvent *e)
Chris@0: {
Chris@0:     std::cerr << "mouseDoubleClickEvent" << std::endl;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::leaveEvent(QEvent *)
Chris@0: {
Chris@0:     bool previouslyIdentifying = m_identifyFeatures;
Chris@0:     m_identifyFeatures = false;
Chris@0:     if (previouslyIdentifying) update();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::wheelEvent(QWheelEvent *e)
Chris@0: {
Chris@0:     //std::cerr << "wheelEvent, delta " << e->delta() << std::endl;
Chris@0: 
Chris@0:     int newZoomLevel = m_zoomLevel;
Chris@0: 
Chris@0:     int count = e->delta();
Chris@0: 
Chris@0:     if (count > 0) {
Chris@0: 	if (count >= 120) count /= 120;
Chris@0: 	else count = 1;
Chris@0:     } 
Chris@0: 
Chris@0:     if (count < 0) {
Chris@0: 	if (count <= -120) count /= 120;
Chris@0: 	else count = -1;
Chris@0:     }
Chris@0:   
Chris@0:     while (count > 0) {
Chris@0: 	if (newZoomLevel <= 2) {
Chris@0: 	    newZoomLevel = 1;
Chris@0: 	    break;
Chris@0: 	}
Chris@0: 	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel - 1, 
Chris@0: 						  ZoomConstraint::RoundDown);
Chris@0: 	--count;
Chris@0:     }
Chris@0: 
Chris@0:     while (count < 0) {
Chris@0: 	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel + 1,
Chris@0: 						  ZoomConstraint::RoundUp);
Chris@0: 	++count;
Chris@0:     }
Chris@0: 
Chris@0:     if (newZoomLevel != m_zoomLevel) {
Chris@0: 	setZoomLevel(newZoomLevel);
Chris@0:     }
Chris@0: 
Chris@0:     emit paneInteractedWith();
Chris@0: }
Chris@0:     
Chris@0: 
Chris@0: #ifdef INCLUDE_MOCFILES
Chris@0: #include "Pane.moc.cpp"
Chris@0: #endif
Chris@0: