Mercurial > hg > svgui
view widgets/Panner.cpp @ 57:2b87a7bd9256
* update TODO, some tidying
author | Chris Cannam |
---|---|
date | Mon, 20 Mar 2006 11:37:45 +0000 |
parents | 38fe0ea9e46e |
children | 01ab51f72e84 |
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/* -*- 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, 2005-2006 This is experimental software. Not for distribution. */ #include "Panner.h" #include "base/Layer.h" #include "base/Model.h" #include "base/ZoomConstraint.h" #include <QPaintEvent> #include <QPainter> #include <iostream> using std::cerr; using std::endl; Panner::Panner(QWidget *w) : View(w, false), m_clickedInRange(false) { setObjectName(tr("Panner")); m_followPan = false; m_followZoom = false; } void Panner::modelChanged(size_t startFrame, size_t endFrame) { View::modelChanged(startFrame, endFrame); } void Panner::modelReplaced() { View::modelReplaced(); } void Panner::registerView(View *widget) { m_widgets.insert(widget); update(); } void Panner::unregisterView(View *widget) { m_widgets.erase(widget); update(); } void Panner::viewManagerCentreFrameChanged(void *p, unsigned long f, bool) { // std::cerr << "Panner[" << this << "]::viewManagerCentreFrameChanged(" // << p << ", " << f << ")" << std::endl; if (p == this) return; if (m_widgets.find(p) != m_widgets.end()) { update(); } } void Panner::viewManagerZoomLevelChanged(void *p, unsigned long z, bool) { if (p == this) return; if (m_widgets.find(p) != m_widgets.end()) { update(); } } void Panner::viewManagerPlaybackFrameChanged(unsigned long f) { bool changed = false; if (getXForFrame(m_playPointerFrame) != getXForFrame(f)) changed = true; m_playPointerFrame = f; if (changed) update(); } void Panner::paintEvent(QPaintEvent *e) { // Recalculate zoom in case the size of the widget has changed. size_t startFrame = getModelsStartFrame(); size_t frameCount = getModelsEndFrame() - getModelsStartFrame(); int zoomLevel = frameCount / width(); if (zoomLevel < 1) zoomLevel = 1; zoomLevel = getZoomConstraintBlockSize(zoomLevel, ZoomConstraint::RoundUp); if (zoomLevel != m_zoomLevel) { m_zoomLevel = zoomLevel; emit zoomLevelChanged(this, m_zoomLevel, m_followZoom); } size_t centreFrame = startFrame + m_zoomLevel * (width() / 2); if (centreFrame > (startFrame + getModelsEndFrame())/2) { centreFrame = (startFrame + getModelsEndFrame())/2; } if (centreFrame != m_centreFrame) { m_centreFrame = centreFrame; emit centreFrameChanged(this, m_centreFrame, false); } View::paintEvent(e); QPainter paint; paint.begin(this); QRect r(rect()); if (e) { r = e->rect(); paint.setClipRect(r); } paint.setPen(Qt::black); int y = 0; int prevx0 = -10; int prevx1 = -10; for (WidgetSet::iterator i = m_widgets.begin(); i != m_widgets.end(); ++i) { if (!*i) continue; View *w = (View *)*i; long f0 = w->getFrameForX(0); long f1 = w->getFrameForX(w->width()); int x0 = getXForFrame(f0); int x1 = getXForFrame(f1); if (x0 != prevx0 || x1 != prevx1) { y += height() / 10 + 1; prevx0 = x0; prevx1 = x1; } if (x1 <= x0) x1 = x0 + 1; paint.drawRect(x0, y, x1 - x0, height() - 2 * y); } paint.end(); } void Panner::mousePressEvent(QMouseEvent *e) { m_clickPos = e->pos(); for (WidgetSet::iterator i = m_widgets.begin(); i != m_widgets.end(); ++i) { if (*i) { m_clickedInRange = true; m_dragCentreFrame = ((View *)*i)->getCentreFrame(); break; } } } void Panner::mouseReleaseEvent(QMouseEvent *e) { if (m_clickedInRange) { mouseMoveEvent(e); } m_clickedInRange = false; } void Panner::mouseMoveEvent(QMouseEvent *e) { if (!m_clickedInRange) return; 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)) { emit centreFrameChanged(this, newCentreFrame, true); } } #ifdef INCLUDE_MOCFILES #include "Panner.moc.cpp" #endif