lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     This file copyright 2006 Chris Cannam and QMUL.
lbajardsilogic@0:     
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: #include "Overview.h"
lbajardsilogic@0: #include "layer/Layer.h"
lbajardsilogic@0: #include "data/model/Model.h"
lbajardsilogic@0: #include "base/ZoomConstraint.h"
lbajardsilogic@0: #include "system/System.h"
lbajardsilogic@0: 
lbajardsilogic@0: #include <QPaintEvent>
lbajardsilogic@0: #include <QPainter>
lbajardsilogic@0: #include <iostream>
lbajardsilogic@0: 
lbajardsilogic@0: using std::cerr;
lbajardsilogic@0: using std::endl;
lbajardsilogic@0: 
lbajardsilogic@0: Overview::Overview(QWidget *w) :
lbajardsilogic@0:     View(w, false),
lbajardsilogic@0:     m_clickedInRange(false)
lbajardsilogic@0: {
lbajardsilogic@0:     setObjectName(tr("Overview"));
lbajardsilogic@0:     m_followPan = false;
lbajardsilogic@0:     m_followZoom = false;
lbajardsilogic@0:     setPlaybackFollow(PlaybackIgnore);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::modelChanged(size_t startFrame, size_t endFrame)
lbajardsilogic@0: {
lbajardsilogic@0:     View::modelChanged(startFrame, endFrame);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::modelReplaced()
lbajardsilogic@0: {
lbajardsilogic@0:     View::modelReplaced();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::registerView(View *view)
lbajardsilogic@0: {
lbajardsilogic@0:     m_views.insert(view);
lbajardsilogic@0:     update(); 
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::unregisterView(View *view)
lbajardsilogic@0: {
lbajardsilogic@0:     m_views.erase(view);
lbajardsilogic@0:     update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::globalCentreFrameChanged(unsigned long)
lbajardsilogic@0: {
lbajardsilogic@0:     update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::viewCentreFrameChanged(View *v, unsigned long)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_views.find(v) != m_views.end()) {
lbajardsilogic@0: 	update();
lbajardsilogic@0:     }
lbajardsilogic@0: }    
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::viewZoomLevelChanged(View *v, unsigned long, bool)
lbajardsilogic@0: {
lbajardsilogic@0:     if (v == this) return;
lbajardsilogic@0:     if (m_views.find(v) != m_views.end()) {
lbajardsilogic@0: 	update();
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::viewManagerPlaybackFrameChanged(unsigned long f)
lbajardsilogic@0: {
lbajardsilogic@0:     bool changed = false;
lbajardsilogic@0: 
lbajardsilogic@0:     if (getXForFrame(m_playPointerFrame) != getXForFrame(f)) changed = true;
lbajardsilogic@0:     m_playPointerFrame = f;
lbajardsilogic@0: 
lbajardsilogic@0:     if (changed) update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::paintEvent(QPaintEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     // Recalculate zoom in case the size of the widget has changed.
lbajardsilogic@0: 
lbajardsilogic@0: //    std::cerr << "Overview::paintEvent: width is " << width() << ", centre frame " << m_centreFrame << std::endl;
lbajardsilogic@0: 
lbajardsilogic@0:     size_t startFrame = getModelsStartFrame();
lbajardsilogic@0:     size_t frameCount = getModelsEndFrame() - getModelsStartFrame();
lbajardsilogic@0:     int zoomLevel = frameCount / width();
lbajardsilogic@0:     if (zoomLevel < 1) zoomLevel = 1;
lbajardsilogic@0:     zoomLevel = getZoomConstraintBlockSize(zoomLevel,
lbajardsilogic@0: 					   ZoomConstraint::RoundUp);
lbajardsilogic@0:     if (zoomLevel != m_zoomLevel) {
lbajardsilogic@0: 	m_zoomLevel = zoomLevel;
lbajardsilogic@0: 	emit zoomLevelChanged(m_zoomLevel, m_followZoom);
lbajardsilogic@0:     }
lbajardsilogic@0:     size_t centreFrame = startFrame + m_zoomLevel * (width() / 2);
lbajardsilogic@0:     if (centreFrame > (startFrame + getModelsEndFrame())/2) {
lbajardsilogic@0: 	centreFrame = (startFrame + getModelsEndFrame())/2;
lbajardsilogic@0:     }
lbajardsilogic@0:     if (centreFrame != m_centreFrame) {
lbajardsilogic@0: //        std::cerr << "Overview::paintEvent: Centre frame changed from "
lbajardsilogic@0: //                  << m_centreFrame << " to " << centreFrame << " and thus start frame from " << getStartFrame();
lbajardsilogic@0: 	m_centreFrame = centreFrame;
lbajardsilogic@0: //        std::cerr << " to " << getStartFrame() << std::endl;
lbajardsilogic@0: 	emit centreFrameChanged(m_centreFrame, false, PlaybackIgnore);
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     View::paintEvent(e);
lbajardsilogic@0: 
lbajardsilogic@0:     QPainter paint;
lbajardsilogic@0:     paint.begin(this);
lbajardsilogic@0: 
lbajardsilogic@0:     QRect r(rect());
lbajardsilogic@0: 
lbajardsilogic@0:     if (e) {
lbajardsilogic@0: 	r = e->rect();
lbajardsilogic@0: 	paint.setClipRect(r);
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     paint.setPen(Qt::black);
lbajardsilogic@0: 
lbajardsilogic@0:     int y = 0;
lbajardsilogic@0: 
lbajardsilogic@0:     int prevx0 = -10;
lbajardsilogic@0:     int prevx1 = -10;
lbajardsilogic@0: 
lbajardsilogic@0:     for (ViewSet::iterator i = m_views.begin(); i != m_views.end(); ++i) {
lbajardsilogic@0: 	if (!*i) continue;
lbajardsilogic@0: 
lbajardsilogic@0: 	View *w = (View *)*i;
lbajardsilogic@0: 
lbajardsilogic@0: 	long f0 = w->getFrameForX(0);
lbajardsilogic@0: 	long f1 = w->getFrameForX(w->width());
lbajardsilogic@0: 
lbajardsilogic@0: 	int x0 = getXForFrame(f0);
lbajardsilogic@0: 	int x1 = getXForFrame(f1);
lbajardsilogic@0: 
lbajardsilogic@0: 	if (x0 != prevx0 || x1 != prevx1) {
lbajardsilogic@0: 	    y += height() / 10 + 1;
lbajardsilogic@0: 	    prevx0 = x0;
lbajardsilogic@0: 	    prevx1 = x1;
lbajardsilogic@0: 	}
lbajardsilogic@0: 
lbajardsilogic@0: 	if (x1 <= x0) x1 = x0 + 1;
lbajardsilogic@0: 	
lbajardsilogic@0: 	paint.drawRect(x0, y, x1 - x0, height() - 2 * y);
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     paint.end();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::mousePressEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     m_clickPos = e->pos();
lbajardsilogic@0:     for (ViewSet::iterator i = m_views.begin(); i != m_views.end(); ++i) {
lbajardsilogic@0: 	if (*i) {
lbajardsilogic@0: 	    m_clickedInRange = true;
lbajardsilogic@0: 	    m_dragCentreFrame = ((View *)*i)->getCentreFrame();
lbajardsilogic@0: 	    break;
lbajardsilogic@0: 	}
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::mouseReleaseEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_clickedInRange) {
lbajardsilogic@0: 	mouseMoveEvent(e);
lbajardsilogic@0:     }
lbajardsilogic@0:     m_clickedInRange = false;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::mouseMoveEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     if (!m_clickedInRange) return;
lbajardsilogic@0: 
lbajardsilogic@0:     long xoff = int(e->x()) - int(m_clickPos.x());
lbajardsilogic@0:     long frameOff = xoff * m_zoomLevel;
lbajardsilogic@0:     
lbajardsilogic@0:     size_t newCentreFrame = m_dragCentreFrame;
lbajardsilogic@0:     if (frameOff > 0) {
lbajardsilogic@0: 	newCentreFrame += frameOff;
lbajardsilogic@0:     } else if (newCentreFrame >= size_t(-frameOff)) {
lbajardsilogic@0: 	newCentreFrame += frameOff;
lbajardsilogic@0:     } else {
lbajardsilogic@0: 	newCentreFrame = 0;
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     if (newCentreFrame >= getModelsEndFrame()) {
lbajardsilogic@0: 	newCentreFrame = getModelsEndFrame();
lbajardsilogic@0: 	if (newCentreFrame > 0) --newCentreFrame;
lbajardsilogic@0:     }
lbajardsilogic@0:     
lbajardsilogic@191:     if (MAX(m_centreFrame, newCentreFrame) -
lbajardsilogic@191: 	MIN(m_centreFrame, newCentreFrame) > size_t(m_zoomLevel)) {
lbajardsilogic@0: 	emit centreFrameChanged(newCentreFrame, true, PlaybackScrollContinuous);
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::mouseDoubleClickEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     long frame = getFrameForX(e->x());
lbajardsilogic@0:     emit centreFrameChanged(frame, true, PlaybackScrollContinuous);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::enterEvent(QEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     emit contextHelpChanged(tr("Click and drag to navigate; double-click to jump"));
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Overview::leaveEvent(QEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     emit contextHelpChanged("");
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: