comparison widgets/Pane.cpp @ 0:2a4f26e85b4c

initial import

+/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    A waveform viewer and audio annotation editor.
+    Chris Cannam, Queen Mary University of London, 2005
+    
+    This is experimental software.  Not for distribution.
+*/
+
+#include "widgets/Pane.h"
+#include "base/Layer.h"
+#include "base/Model.h"
+#include "base/ZoomConstraint.h"
+#include "base/RealTime.h"
+#include "base/Profiler.h"
+
+#include <QPaintEvent>
+#include <QPainter>
+#include <iostream>
+#include <cmath>
+
+using std::cerr;
+using std::endl;
+
+Pane::Pane(QWidget *w) :
+    View(w, true),
+    m_identifyFeatures(false),
+    m_clickedInRange(false),
+    m_shiftPressed(false),
+    m_centreLineVisible(true)
+{
+    setObjectName("Pane");
+    setMouseTracking(true);
+}
+
+bool
+Pane::shouldIlluminateLocalFeatures(const Layer *layer, QPoint &pos)
+{
+    for (LayerList::iterator vi = m_layers.end(); vi != m_layers.begin(); ) {
+	--vi;
+	if (layer != *vi) return false;
+	pos = m_identifyPoint;
+	return m_identifyFeatures;
+    }
+
+    return false;
+}
+
+void
+Pane::setCentreLineVisible(bool visible)
+{
+    m_centreLineVisible = visible;
+    update();
+}
+
+void
+Pane::paintEvent(QPaintEvent *e)
+{
+    QPainter paint;
+
+    QRect r(rect());
+
+    if (e) {
+	r = e->rect();
+    }
+/*
+    paint.begin(this);
+    paint.setClipRect(r);
+
+    if (hasLightBackground()) {
+	paint.setPen(Qt::white);
+	paint.setBrush(Qt::white);
+    } else {
+	paint.setPen(Qt::black);
+	paint.setBrush(Qt::black);
+    }
+    paint.drawRect(r);
+
+    paint.end();
+*/
+    View::paintEvent(e);
+
+    paint.begin(this);
+
+    if (e) {
+	paint.setClipRect(r);
+    }
+	
+    for (LayerList::iterator vi = m_layers.end(); vi != m_layers.begin(); ) {
+	--vi;
+
+	int sw = (*vi)->getVerticalScaleWidth(paint);
+
+	if (sw > 0 && r.left() < sw) {
+
+//	    Profiler profiler("Pane::paintEvent - painting vertical scale", true);
+
+//	    std::cerr << "Pane::paintEvent: calling paint.save() in vertical scale block" << std::endl;
+	    paint.save();
+
+	    paint.setPen(Qt::black);
+	    paint.setBrush(Qt::white);
+	    paint.drawRect(0, 0, sw, height());
+
+	    paint.setBrush(Qt::NoBrush);
+	    (*vi)->paintVerticalScale(paint, QRect(0, 0, sw, height()));
+
+	    paint.restore();
+	}
+
+	if (m_identifyFeatures) {
+	    QRect descRect = (*vi)->getFeatureDescriptionRect(paint,
+							      m_identifyPoint);
+	    if (descRect.width() > 0 && descRect.height() > 0 &&
+		r.left() + r.width() >= width() - descRect.width() &&
+		r.top() < descRect.height()) {
+		
+//		Profiler profiler("Pane::paintEvent - painting local feature description", true);
+		
+//		std::cerr << "Pane::paintEvent: calling paint.save() in feature description block" << std::endl;
+		paint.save();
+		
+		paint.setPen(Qt::black);
+		paint.setBrush(Qt::white);
+		
+		QRect rect(width() - descRect.width() - 1, 0,
+			   descRect.width(), descRect.height());
+		
+		paint.drawRect(rect);
+		
+		paint.setBrush(Qt::NoBrush);
+		(*vi)->paintLocalFeatureDescription(paint, rect, m_identifyPoint);
+		
+		paint.restore();
+	    }
+	}
+
+	break;
+    }
+    
+    if (m_centreLineVisible) {
+
+	if (hasLightBackground()) {
+	    paint.setPen(QColor(50, 50, 50));
+	} else {
+	    paint.setPen(QColor(200, 200, 200));
+	}	
+	paint.setBrush(Qt::NoBrush);
+	paint.drawLine(width() / 2, 0, width() / 2, height() - 1);
+	
+//    QFont font(paint.font());
+//    font.setBold(true);
+//    paint.setFont(font);
+
+	int sampleRate = getModelsSampleRate();
+	int y = height() - paint.fontMetrics().height()
+	    + paint.fontMetrics().ascent() - 6;
+	
+	LayerList::iterator vi = m_layers.end();
+	
+	if (vi != m_layers.begin()) {
+	    
+	    switch ((*--vi)->getPreferredFrameCountPosition()) {
+		
+	    case Layer::PositionTop:
+		y = paint.fontMetrics().ascent() + 6;
+		break;
+		
+	    case Layer::PositionMiddle:
+		y = (height() - paint.fontMetrics().height()) / 2
+		    + paint.fontMetrics().ascent();
+		break;
+
+	    case Layer::PositionBottom:
+		// y already set correctly
+		break;
+	    }
+	}
+
+	if (sampleRate) {
+
+	    QString text(QString::fromStdString
+			 (RealTime::frame2RealTime
+			  (m_centreFrame, sampleRate).toText(true)));
+
+	    int tw = paint.fontMetrics().width(text);
+	    int x = width()/2 - 4 - tw;
+
+	    if (hasLightBackground()) {
+		paint.setPen(palette().background().color());
+		for (int dx = -1; dx <= 1; ++dx) {
+		    for (int dy = -1; dy <= 1; ++dy) {
+			if ((dx && dy) || !(dx || dy)) continue;
+			paint.drawText(x + dx, y + dy, text);
+		    }
+		}
+		paint.setPen(QColor(50, 50, 50));
+	    } else {
+		paint.setPen(QColor(200, 200, 200));
+	    }
+
+	    paint.drawText(x, y, text);
+	}
+
+	QString text = QString("%1").arg(m_centreFrame);
+
+	int tw = paint.fontMetrics().width(text);
+	int x = width()/2 + 4;
+    
+	if (hasLightBackground()) {
+	    paint.setPen(palette().background().color());
+	    for (int dx = -1; dx <= 1; ++dx) {
+		for (int dy = -1; dy <= 1; ++dy) {
+		    if ((dx && dy) || !(dx || dy)) continue;
+		    paint.drawText(x + dx, y + dy, text);
+		}
+	    }
+	    paint.setPen(QColor(50, 50, 50));
+	} else {
+	    paint.setPen(QColor(200, 200, 200));
+	}
+	paint.drawText(x, y, text);
+    }
+
+    if (m_clickedInRange && m_shiftPressed) {
+	paint.setPen(Qt::blue);
+	paint.drawRect(m_clickPos.x(), m_clickPos.y(),
+		       m_mousePos.x() - m_clickPos.x(),
+		       m_mousePos.y() - m_clickPos.y());
+    }
+    
+    paint.end();
+}
+
+void
+Pane::mousePressEvent(QMouseEvent *e)
+{
+    m_clickPos = e->pos();
+    m_clickedInRange = true;
+    m_shiftPressed = (e->modifiers() & Qt::ShiftModifier);
+    m_dragCentreFrame = m_centreFrame;
+
+    emit paneInteractedWith();
+}
+
+void
+Pane::mouseReleaseEvent(QMouseEvent *e)
+{
+    if (m_clickedInRange) {
+	mouseMoveEvent(e);
+    }
+    if (m_shiftPressed) {
+
+	int x0 = std::min(m_clickPos.x(), m_mousePos.x());
+	int x1 = std::max(m_clickPos.x(), m_mousePos.x());
+	int w = x1 - x0;
+
+	long newStartFrame = getStartFrame() + m_zoomLevel * x0;
+
+	if (newStartFrame <= -long(width() * m_zoomLevel)) {
+	    newStartFrame  = -long(width() * m_zoomLevel) + 1;
+	}
+
+	if (newStartFrame >= long(getModelsEndFrame())) {
+	    newStartFrame  = getModelsEndFrame() - 1;
+	}
+
+	float ratio = float(w) / float(width());
+//	std::cerr << "ratio: " << ratio << std::endl;
+	size_t newZoomLevel = (size_t)nearbyint(m_zoomLevel * ratio);
+	if (newZoomLevel < 1) newZoomLevel = 1;
+
+//	std::cerr << "start: " << m_startFrame << ", level " << m_zoomLevel << std::endl;
+	setZoomLevel(getZoomConstraintBlockSize(newZoomLevel));
+	setStartFrame(newStartFrame);
+
+	//cerr << "mouseReleaseEvent: start frame now " << m_startFrame << endl;
+//	update();
+    }
+    m_clickedInRange = false;
+
+    emit paneInteractedWith();
+}
+
+void
+Pane::mouseMoveEvent(QMouseEvent *e)
+{
+    if (!m_clickedInRange) {
+	
+//	std::cerr << "Pane: calling identifyLocalFeatures" << std::endl;
+
+//!!!	identifyLocalFeatures(true, e->x(), e->y());
+
+	bool previouslyIdentifying = m_identifyFeatures;
+	QPoint prevPoint = m_identifyPoint;
+
+	m_identifyFeatures = true;
+	m_identifyPoint = e->pos();
+
+	if (m_identifyFeatures != previouslyIdentifying ||
+	    m_identifyPoint != prevPoint) {
+	    update();
+	}
+
+    } else if (m_shiftPressed) {
+
+	m_mousePos = e->pos();
+	update();
+
+    } else {
+
+	long xoff = int(e->x()) - int(m_clickPos.x());
+	long frameOff = xoff * m_zoomLevel;
+
+	size_t newCentreFrame = m_dragCentreFrame;
+	
+	if (frameOff < 0) {
+	    newCentreFrame -= frameOff;
+	} else if (newCentreFrame >= size_t(frameOff)) {
+	    newCentreFrame -= frameOff;
+	} else {
+	    newCentreFrame = 0;
+	}
+
+	if (newCentreFrame >= getModelsEndFrame()) {
+	    newCentreFrame = getModelsEndFrame();
+	    if (newCentreFrame > 0) --newCentreFrame;
+	}
+
+	if (std::max(m_centreFrame, newCentreFrame) -
+	    std::min(m_centreFrame, newCentreFrame) > size_t(m_zoomLevel)) {
+	    setCentreFrame(newCentreFrame);
+	}
+    }
+}
+
+void
+Pane::mouseDoubleClickEvent(QMouseEvent *e)
+{
+    std::cerr << "mouseDoubleClickEvent" << std::endl;
+}
+
+void
+Pane::leaveEvent(QEvent *)
+{
+    bool previouslyIdentifying = m_identifyFeatures;
+    m_identifyFeatures = false;
+    if (previouslyIdentifying) update();
+}
+
+void
+Pane::wheelEvent(QWheelEvent *e)
+{
+    //std::cerr << "wheelEvent, delta " << e->delta() << std::endl;
+
+    int newZoomLevel = m_zoomLevel;
+
+    int count = e->delta();
+
+    if (count > 0) {
+	if (count >= 120) count /= 120;
+	else count = 1;
+    } 
+
+    if (count < 0) {
+	if (count <= -120) count /= 120;
+	else count = -1;
+    }
+  
+    while (count > 0) {
+	if (newZoomLevel <= 2) {
+	    newZoomLevel = 1;
+	    break;
+	}
+	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel - 1, 
+						  ZoomConstraint::RoundDown);
+	--count;
+    }
+
+    while (count < 0) {
+	newZoomLevel = getZoomConstraintBlockSize(newZoomLevel + 1,
+						  ZoomConstraint::RoundUp);
+	++count;
+    }
+
+    if (newZoomLevel != m_zoomLevel) {
+	setZoomLevel(newZoomLevel);
+    }
+
+    emit paneInteractedWith();
+}
+    
+
+#ifdef INCLUDE_MOCFILES
+#include "Pane.moc.cpp"
+#endif
+