comparison layer/TimeRulerLayer.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 "TimeRulerLayer.h"
+
+#include "base/Model.h"
+#include "base/RealTime.h"
+#include "base/View.h"
+
+#include <QPainter>
+
+#include <iostream>
+
+using std::cerr;
+using std::endl;
+
+TimeRulerLayer::TimeRulerLayer(View *w) :
+    Layer(w),
+    m_model(0),
+    m_colour(Qt::black),
+    m_labelHeight(LabelTop)
+{
+    m_view->addLayer(this);
+}
+
+void
+TimeRulerLayer::setModel(Model *model)
+{
+    if (m_model == model) return;
+    m_model = model;
+    emit modelReplaced();
+}
+
+void
+TimeRulerLayer::setBaseColour(QColor colour)
+{
+    if (m_colour == colour) return;
+    m_colour = colour;
+    emit layerParametersChanged();
+}
+
+Layer::PropertyList
+TimeRulerLayer::getProperties() const
+{
+    PropertyList list;
+    list.push_back(tr("Colour"));
+    return list;
+}
+
+Layer::PropertyType
+TimeRulerLayer::getPropertyType(const PropertyName &name) const
+{
+    return ValueProperty;
+}
+
+int
+TimeRulerLayer::getPropertyRangeAndValue(const PropertyName &name,
+					 int *min, int *max) const
+{
+    int deft = 0;
+
+    if (name == tr("Colour")) {
+
+	*min = 0;
+	*max = 5;
+
+	if (m_colour == Qt::black) deft = 0;
+	else if (m_colour == Qt::darkRed) deft = 1;
+	else if (m_colour == Qt::darkBlue) deft = 2;
+	else if (m_colour == Qt::darkGreen) deft = 3;
+	else if (m_colour == QColor(200, 50, 255)) deft = 4;
+	else if (m_colour == QColor(255, 150, 50)) deft = 5;
+
+    } else {
+	
+	deft = Layer::getPropertyRangeAndValue(name, min, max);
+    }
+
+    return deft;
+}
+
+QString
+TimeRulerLayer::getPropertyValueLabel(const PropertyName &name,
+				    int value) const
+{
+    if (name == tr("Colour")) {
+	switch (value) {
+	default:
+	case 0: return tr("Black");
+	case 1: return tr("Red");
+	case 2: return tr("Blue");
+	case 3: return tr("Green");
+	case 4: return tr("Purple");
+	case 5: return tr("Orange");
+	}
+    }
+    return tr("<unknown>");
+}
+
+void
+TimeRulerLayer::setProperty(const PropertyName &name, int value)
+{
+    if (name == tr("Colour")) {
+	switch (value) {
+	default:
+	case 0:	setBaseColour(Qt::black); break;
+	case 1: setBaseColour(Qt::darkRed); break;
+	case 2: setBaseColour(Qt::darkBlue); break;
+	case 3: setBaseColour(Qt::darkGreen); break;
+	case 4: setBaseColour(QColor(200, 50, 255)); break;
+	case 5: setBaseColour(QColor(255, 150, 50)); break;
+	}
+    }
+}
+
+void
+TimeRulerLayer::paint(QPainter &paint, QRect rect) const
+{
+//    std::cerr << "TimeRulerLayer::paint (" << rect.x() << "," << rect.y()
+//	      << ") [" << rect.width() << "x" << rect.height() << "]" << std::endl;
+    
+    if (!m_model || !m_model->isOK()) return;
+
+    int sampleRate = m_model->getSampleRate();
+    if (!sampleRate) return;
+
+    long startFrame = m_view->getStartFrame();
+    long endFrame = m_view->getEndFrame();
+
+    int zoomLevel = m_view->getZoomLevel();
+
+    long rectStart = startFrame + (rect.x() - 100) * zoomLevel;
+    long rectEnd = startFrame + (rect.x() + rect.width() + 100) * zoomLevel;
+    if (rectStart < startFrame) rectStart = startFrame;
+    if (rectEnd > endFrame) rectEnd = endFrame;
+
+//    std::cerr << "TimeRulerLayer::paint: calling paint.save()" << std::endl;
+    paint.save();
+//!!!    paint.setClipRect(m_view->rect());
+
+    int minPixelSpacing = 50;
+
+    RealTime rtStart = RealTime::frame2RealTime(startFrame, sampleRate);
+    RealTime rtEnd = RealTime::frame2RealTime(endFrame, sampleRate);
+//    cerr << "startFrame " << startFrame << ", endFrame " << m_view->getEndFrame() << ", rtStart " << rtStart << ", rtEnd " << rtEnd << endl;
+    int count = m_view->width() / minPixelSpacing;
+    if (count < 1) count = 1;
+    RealTime rtGap = (rtEnd - rtStart) / count;
+//    cerr << "rtGap is " << rtGap << endl;
+
+    int incms;
+    bool quarter = false;
+
+    if (rtGap.sec > 0) {
+	incms = 1000;
+	int s = rtGap.sec;
+	if (s > 0) { incms *= 5; s /= 5; }
+	if (s > 0) { incms *= 2; s /= 2; }
+	if (s > 0) { incms *= 6; s /= 6; quarter = true; }
+	if (s > 0) { incms *= 5; s /= 5; quarter = false; }
+	if (s > 0) { incms *= 2; s /= 2; }
+	if (s > 0) { incms *= 6; s /= 6; quarter = true; }
+	while (s > 0) {
+	    incms *= 10;
+	    s /= 10;
+	    quarter = false;
+	}
+    } else {
+	incms = 1;
+	int ms = rtGap.msec();
+	if (ms > 0) { incms *= 10; ms /= 10; }
+	if (ms > 0) { incms *= 10; ms /= 10; }
+	if (ms > 0) { incms *= 5; ms /= 5; }
+	if (ms > 0) { incms *= 2; ms /= 2; }
+    }
+//    cerr << "incms is " << incms << endl;
+
+    RealTime rt = RealTime::frame2RealTime(rectStart, sampleRate);
+    long ms = rt.sec * 1000 + rt.msec();
+    ms = (ms / incms) * incms - incms;
+
+    RealTime incRt = RealTime(incms / 1000, (incms % 1000) * 1000000);
+    long incFrame = RealTime::realTime2Frame(incRt, sampleRate);
+    int incX = incFrame / zoomLevel;
+    int ticks = 10;
+    if (incX < minPixelSpacing * 2) {
+	ticks = quarter ? 4 : 5;
+    }
+
+    QRect oldClipRect = rect;
+    QRect newClipRect(oldClipRect.x() - 25, oldClipRect.y(),
+		      oldClipRect.width() + 50, oldClipRect.height());
+    paint.setClipRect(newClipRect);
+
+    QColor greyColour(m_colour);
+    if (m_colour == Qt::black) {
+	greyColour = QColor(200,200,200);
+    } else {
+	greyColour = m_colour.light(150);
+    }
+
+    while (1) {
+
+	rt = RealTime(ms / 1000, (ms % 1000) * 1000000);
+	ms += incms;
+
+	long frame = RealTime::realTime2Frame(rt, sampleRate);
+	if (frame >= rectEnd) break;
+
+	int x = (frame - startFrame) / zoomLevel;
+	if (x < rect.x() || x >= rect.x() + rect.width()) continue;
+
+	paint.setPen(greyColour);
+	paint.drawLine(x, 0, x, m_view->height());
+
+	paint.setPen(m_colour);
+	paint.drawLine(x, 0, x, 5);
+	paint.drawLine(x, m_view->height() - 6, x, m_view->height() - 1);
+
+	QString text(QString::fromStdString(rt.toText()));
+
+	int y;
+	QFontMetrics metrics = paint.fontMetrics();
+	switch (m_labelHeight) {
+	default:
+	case LabelTop:
+	    y = 6 + metrics.ascent();
+	    break;
+	case LabelMiddle:
+	    y = m_view->height() / 2 - metrics.height() / 2 + metrics.ascent();
+	    break;
+	case LabelBottom:
+	    y = m_view->height() - metrics.height() + metrics.ascent() - 6;
+	}
+
+	int tw = metrics.width(text);
+
+	paint.setPen(m_view->palette().background().color());
+
+	//!!! simple drawing function for this please
+	//!!! and need getContrastingColour() in widget, or use the
+	//palette properly -- get the base class able to draw text
+	//using the proper colour (or this technique) automatically
+	for (int dx = -1; dx <= 1; ++dx) {
+	    for (int dy = -1; dy <= 1; ++dy) {
+		if ((dx && dy) || !(dx || dy)) continue;
+		paint.drawText(x + 2 - tw / 2 + dx, y + dy, text);
+	    }
+	}
+	
+	paint.setPen(m_colour);
+	paint.drawText(x + 2 - tw / 2, y, text);
+		
+	paint.setPen(greyColour);
+
+	for (int i = 1; i < ticks; ++i) {
+	    rt = rt + (incRt / ticks);
+	    frame = RealTime::realTime2Frame(rt, sampleRate);
+	    x = (frame - startFrame) / zoomLevel;
+	    int sz = 5;
+	    if (ticks == 10) {
+		if ((i % 2) == 1) {
+		    if (i == 5) {
+			paint.drawLine(x, 0, x, m_view->height());
+		    } else sz = 3;
+		} else {
+		    sz = 7;
+		}
+	    }
+	    paint.drawLine(x, 0, x, sz);
+	    paint.drawLine(x, m_view->height() - sz - 1, x, m_view->height() - 1);
+	}
+    }
+
+    paint.restore();
+}
+    
+
+#ifdef INCLUDE_MOCFILES
+#include "TimeRulerLayer.moc.cpp"
+#endif
+