Mercurial > hg > svgui
view view/Overview.cpp @ 522:0db823c49ed6
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author | Chris Cannam |
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date | Fri, 13 Mar 2009 11:33:26 +0000 |
parents | 2ed4e572d0d4 |
children | f4960f8ce798 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam and QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "Overview.h" #include "layer/Layer.h" #include "data/model/Model.h" #include "base/ZoomConstraint.h" #include <QPaintEvent> #include <QPainter> #include <iostream> using std::cerr; using std::endl; Overview::Overview(QWidget *w) : View(w, false), m_clickedInRange(false) { setObjectName(tr("Overview")); m_followPan = false; m_followZoom = false; setPlaybackFollow(PlaybackIgnore); m_modelTestTime.start(); } void Overview::modelChanged(size_t startFrame, size_t endFrame) { bool zoomChanged = false; size_t frameCount = getModelsEndFrame() - getModelsStartFrame(); int zoomLevel = frameCount / width(); if (zoomLevel < 1) zoomLevel = 1; zoomLevel = getZoomConstraintBlockSize(zoomLevel, ZoomConstraint::RoundUp); if (zoomLevel != m_zoomLevel) { zoomChanged = true; } if (!zoomChanged) { if (m_modelTestTime.elapsed() < 1000) { for (LayerList::const_iterator i = m_layers.begin(); i != m_layers.end(); ++i) { if ((*i)->getModel() && (!(*i)->getModel()->isOK() || !(*i)->getModel()->isReady())) { return; } } } else { m_modelTestTime.restart(); } } View::modelChanged(startFrame, endFrame); } void Overview::modelReplaced() { m_playPointerFrame = getAlignedPlaybackFrame(); View::modelReplaced(); } void Overview::registerView(View *view) { m_views.insert(view); update(); } void Overview::unregisterView(View *view) { m_views.erase(view); update(); } void Overview::globalCentreFrameChanged(unsigned long) { update(); } void Overview::viewCentreFrameChanged(View *v, unsigned long) { if (m_views.find(v) != m_views.end()) { update(); } } void Overview::viewZoomLevelChanged(View *v, unsigned long, bool) { if (v == this) return; if (m_views.find(v) != m_views.end()) { update(); } } void Overview::viewManagerPlaybackFrameChanged(unsigned long f) { bool changed = false; f = getAlignedPlaybackFrame(); if (getXForFrame(m_playPointerFrame) != getXForFrame(f)) changed = true; m_playPointerFrame = f; if (changed) update(); } void Overview::paintEvent(QPaintEvent *e) { // Recalculate zoom in case the size of the widget has changed. // std::cerr << "Overview::paintEvent: width is " << width() << ", centre frame " << m_centreFrame << std::endl; 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(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) { // std::cerr << "Overview::paintEvent: Centre frame changed from " // << m_centreFrame << " to " << centreFrame << " and thus start frame from " << getStartFrame(); m_centreFrame = centreFrame; // std::cerr << " to " << getStartFrame() << std::endl; emit centreFrameChanged(m_centreFrame, false, PlaybackIgnore); } View::paintEvent(e); QPainter paint; paint.begin(this); QRect r(rect()); if (e) { r = e->rect(); paint.setClipRect(r); } paint.setPen(getForeground()); int y = 0; int prevx0 = -10; int prevx1 = -10; for (ViewSet::iterator i = m_views.begin(); i != m_views.end(); ++i) { if (!*i) continue; View *w = (View *)*i; long f0 = w->getFrameForX(0); long f1 = w->getFrameForX(w->width()); if (f0 >= 0) { size_t rf0 = w->alignToReference(f0); f0 = alignFromReference(rf0); } if (f1 >= 0) { size_t rf1 = w->alignToReference(f1); f1 = alignFromReference(rf1); } 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 Overview::mousePressEvent(QMouseEvent *e) { m_clickPos = e->pos(); long clickFrame = getFrameForX(m_clickPos.x()); if (clickFrame > 0) m_dragCentreFrame = clickFrame; else m_dragCentreFrame = 0; m_clickedInRange = true; for (ViewSet::iterator i = m_views.begin(); i != m_views.end(); ++i) { if (*i && (*i)->getAligningModel() == getAligningModel()) { m_dragCentreFrame = (*i)->getCentreFrame(); break; } } } void Overview::mouseReleaseEvent(QMouseEvent *e) { if (m_clickedInRange) { mouseMoveEvent(e); } m_clickedInRange = false; } void Overview::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)) { size_t rf = alignToReference(newCentreFrame); emit centreFrameChanged(rf, true, PlaybackScrollContinuous); } } void Overview::mouseDoubleClickEvent(QMouseEvent *e) { long frame = getFrameForX(e->x()); size_t rf = 0; if (frame > 0) rf = alignToReference(frame); emit centreFrameChanged(rf, true, PlaybackScrollContinuous); } void Overview::enterEvent(QEvent *) { emit contextHelpChanged(tr("Click and drag to navigate; double-click to jump")); } void Overview::leaveEvent(QEvent *) { emit contextHelpChanged(""); }