Chris@0: /* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@0:     A waveform viewer and audio annotation editor.
Chris@5:     Chris Cannam, Queen Mary University of London, 2005-2006
Chris@0:     
Chris@0:     This is experimental software.  Not for distribution.
Chris@0: */
Chris@0: 
Chris@0: #include "widgets/Pane.h"
Chris@0: #include "base/Layer.h"
Chris@0: #include "base/Model.h"
Chris@0: #include "base/ZoomConstraint.h"
Chris@0: #include "base/RealTime.h"
Chris@0: #include "base/Profiler.h"
Chris@13: #include "base/ViewManager.h"
Chris@0: 
Chris@0: #include <QPaintEvent>
Chris@0: #include <QPainter>
Chris@0: #include <iostream>
Chris@0: #include <cmath>
Chris@0: 
Chris@0: using std::cerr;
Chris@0: using std::endl;
Chris@0: 
Chris@0: Pane::Pane(QWidget *w) :
Chris@0:     View(w, true),
Chris@0:     m_identifyFeatures(false),
Chris@0:     m_clickedInRange(false),
Chris@0:     m_shiftPressed(false),
Chris@13:     m_ctrlPressed(false),
Chris@17:     m_navigating(false),
Chris@17:     m_resizing(false),
Chris@0:     m_centreLineVisible(true)
Chris@0: {
Chris@0:     setObjectName("Pane");
Chris@0:     setMouseTracking(true);
Chris@0: }
Chris@0: 
Chris@0: bool
Chris@0: Pane::shouldIlluminateLocalFeatures(const Layer *layer, QPoint &pos)
Chris@0: {
Chris@0:     for (LayerList::iterator vi = m_layers.end(); vi != m_layers.begin(); ) {
Chris@0: 	--vi;
Chris@0: 	if (layer != *vi) return false;
Chris@0: 	pos = m_identifyPoint;
Chris@0: 	return m_identifyFeatures;
Chris@0:     }
Chris@0: 
Chris@0:     return false;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::setCentreLineVisible(bool visible)
Chris@0: {
Chris@0:     m_centreLineVisible = visible;
Chris@0:     update();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::paintEvent(QPaintEvent *e)
Chris@0: {
Chris@0:     QPainter paint;
Chris@0: 
Chris@0:     QRect r(rect());
Chris@0: 
Chris@0:     if (e) {
Chris@0: 	r = e->rect();
Chris@0:     }
Chris@0: /*
Chris@0:     paint.begin(this);
Chris@0:     paint.setClipRect(r);
Chris@0: 
Chris@0:     if (hasLightBackground()) {
Chris@0: 	paint.setPen(Qt::white);
Chris@0: 	paint.setBrush(Qt::white);
Chris@0:     } else {
Chris@0: 	paint.setPen(Qt::black);
Chris@0: 	paint.setBrush(Qt::black);
Chris@0:     }
Chris@0:     paint.drawRect(r);
Chris@0: 
Chris@0:     paint.end();
Chris@0: */
Chris@0:     View::paintEvent(e);
Chris@0: 
Chris@0:     paint.begin(this);
Chris@0: 
Chris@0:     if (e) {
Chris@0: 	paint.setClipRect(r);
Chris@0:     }
Chris@0: 	
Chris@0:     for (LayerList::iterator vi = m_layers.end(); vi != m_layers.begin(); ) {
Chris@0: 	--vi;
Chris@0: 
Chris@0: 	int sw = (*vi)->getVerticalScaleWidth(paint);
Chris@0: 
Chris@0: 	if (sw > 0 && r.left() < sw) {
Chris@0: 
Chris@0: //	    Profiler profiler("Pane::paintEvent - painting vertical scale", true);
Chris@0: 
Chris@0: //	    std::cerr << "Pane::paintEvent: calling paint.save() in vertical scale block" << std::endl;
Chris@0: 	    paint.save();
Chris@0: 
Chris@0: 	    paint.setPen(Qt::black);
Chris@0: 	    paint.setBrush(Qt::white);
Chris@0: 	    paint.drawRect(0, 0, sw, height());
Chris@0: 
Chris@0: 	    paint.setBrush(Qt::NoBrush);
Chris@0: 	    (*vi)->paintVerticalScale(paint, QRect(0, 0, sw, height()));
Chris@0: 
Chris@0: 	    paint.restore();
Chris@0: 	}
Chris@0: 
Chris@0: 	if (m_identifyFeatures) {
Chris@25: 
Chris@25: 	    QPoint pos = m_identifyPoint;
Chris@25: 	    QString desc = (*vi)->getFeatureDescription(pos);
Chris@25: 	    
Chris@25: 	    if (desc != "") {
Chris@25: 
Chris@25: 		paint.save();
Chris@25: 
Chris@25: 		int tabStop =
Chris@25: 		    paint.fontMetrics().width(tr("Some lengthy prefix:"));
Chris@25: 
Chris@25: 		QRect boundingRect = 
Chris@25: 		    paint.fontMetrics().boundingRect
Chris@25: 		    (rect(),
Chris@25: 		     Qt::AlignRight | Qt::AlignTop | Qt::TextExpandTabs,
Chris@25: 		     desc, tabStop);
Chris@25: 
Chris@25: 		if (hasLightBackground()) {
Chris@25: 		    paint.setPen(Qt::NoPen);
Chris@25: 		    paint.setBrush(QColor(250, 250, 250, 200));
Chris@25: 		} else {
Chris@25: 		    paint.setPen(Qt::NoPen);
Chris@25: 		    paint.setBrush(QColor(50, 50, 50, 200));
Chris@25: 		}
Chris@25: 
Chris@25: 		int extra = paint.fontMetrics().descent();
Chris@25: 		paint.drawRect(width() - boundingRect.width() - 10 - extra,
Chris@25: 			       10 - extra,
Chris@25: 			       boundingRect.width() + 2 * extra,
Chris@25: 			       boundingRect.height() + extra);
Chris@25: 
Chris@25: 		if (hasLightBackground()) {
Chris@25: 		    paint.setPen(QColor(150, 20, 0));
Chris@25: 		} else {
Chris@25: 		    paint.setPen(QColor(255, 150, 100));
Chris@25: 		}
Chris@25: 		
Chris@25: 		QTextOption option;
Chris@25: 		option.setWrapMode(QTextOption::NoWrap);
Chris@25: 		option.setAlignment(Qt::AlignRight | Qt::AlignTop);
Chris@25: 		option.setTabStop(tabStop);
Chris@25: 		paint.drawText(QRectF(width() - boundingRect.width() - 10, 10,
Chris@25: 				      boundingRect.width(),
Chris@25: 				      boundingRect.height()),
Chris@25: 			       desc,
Chris@25: 			       option);
Chris@25: 
Chris@25: 		paint.restore();
Chris@25: 	    }
Chris@25: 
Chris@25: /*!!!
Chris@0: 	    QRect descRect = (*vi)->getFeatureDescriptionRect(paint,
Chris@0: 							      m_identifyPoint);
Chris@0: 	    if (descRect.width() > 0 && descRect.height() > 0 &&
Chris@0: 		r.left() + r.width() >= width() - descRect.width() &&
Chris@0: 		r.top() < descRect.height()) {
Chris@0: 		
Chris@0: //		Profiler profiler("Pane::paintEvent - painting local feature description", true);
Chris@0: 		
Chris@0: //		std::cerr << "Pane::paintEvent: calling paint.save() in feature description block" << std::endl;
Chris@0: 		paint.save();
Chris@0: 		
Chris@0: 		paint.setPen(Qt::black);
Chris@0: 		paint.setBrush(Qt::white);
Chris@0: 		
Chris@0: 		QRect rect(width() - descRect.width() - 1, 0,
Chris@0: 			   descRect.width(), descRect.height());
Chris@0: 		
Chris@0: 		paint.drawRect(rect);
Chris@0: 		
Chris@0: 		paint.setBrush(Qt::NoBrush);
Chris@0: 		(*vi)->paintLocalFeatureDescription(paint, rect, m_identifyPoint);
Chris@0: 		
Chris@0: 		paint.restore();
Chris@0: 	    }
Chris@25: 
Chris@25: */
Chris@0: 	}
Chris@0: 
Chris@0: 	break;
Chris@0:     }
Chris@0:     
Chris@0:     if (m_centreLineVisible) {
Chris@0: 
Chris@0: 	if (hasLightBackground()) {
Chris@0: 	    paint.setPen(QColor(50, 50, 50));
Chris@0: 	} else {
Chris@0: 	    paint.setPen(QColor(200, 200, 200));
Chris@0: 	}	
Chris@0: 	paint.setBrush(Qt::NoBrush);
Chris@0: 	paint.drawLine(width() / 2, 0, width() / 2, height() - 1);
Chris@0: 	
Chris@0: //    QFont font(paint.font());
Chris@0: //    font.setBold(true);
Chris@0: //    paint.setFont(font);
Chris@0: 
Chris@0: 	int sampleRate = getModelsSampleRate();
Chris@0: 	int y = height() - paint.fontMetrics().height()
Chris@0: 	    + paint.fontMetrics().ascent() - 6;
Chris@0: 	
Chris@0: 	LayerList::iterator vi = m_layers.end();
Chris@0: 	
Chris@0: 	if (vi != m_layers.begin()) {
Chris@0: 	    
Chris@0: 	    switch ((*--vi)->getPreferredFrameCountPosition()) {
Chris@0: 		
Chris@0: 	    case Layer::PositionTop:
Chris@0: 		y = paint.fontMetrics().ascent() + 6;
Chris@0: 		break;
Chris@0: 		
Chris@0: 	    case Layer::PositionMiddle:
Chris@0: 		y = (height() - paint.fontMetrics().height()) / 2
Chris@0: 		    + paint.fontMetrics().ascent();
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case Layer::PositionBottom:
Chris@0: 		// y already set correctly
Chris@0: 		break;
Chris@0: 	    }
Chris@0: 	}
Chris@0: 
Chris@0: 	if (sampleRate) {
Chris@0: 
Chris@0: 	    QString text(QString::fromStdString
Chris@0: 			 (RealTime::frame2RealTime
Chris@0: 			  (m_centreFrame, sampleRate).toText(true)));
Chris@0: 
Chris@0: 	    int tw = paint.fontMetrics().width(text);
Chris@0: 	    int x = width()/2 - 4 - tw;
Chris@0: 
Chris@0: 	    if (hasLightBackground()) {
Chris@0: 		paint.setPen(palette().background().color());
Chris@0: 		for (int dx = -1; dx <= 1; ++dx) {
Chris@0: 		    for (int dy = -1; dy <= 1; ++dy) {
Chris@0: 			if ((dx && dy) || !(dx || dy)) continue;
Chris@0: 			paint.drawText(x + dx, y + dy, text);
Chris@0: 		    }
Chris@0: 		}
Chris@0: 		paint.setPen(QColor(50, 50, 50));
Chris@0: 	    } else {
Chris@0: 		paint.setPen(QColor(200, 200, 200));
Chris@0: 	    }
Chris@0: 
Chris@0: 	    paint.drawText(x, y, text);
Chris@0: 	}
Chris@0: 
Chris@0: 	QString text = QString("%1").arg(m_centreFrame);
Chris@0: 
Chris@0: 	int tw = paint.fontMetrics().width(text);
Chris@0: 	int x = width()/2 + 4;
Chris@0:     
Chris@0: 	if (hasLightBackground()) {
Chris@0: 	    paint.setPen(palette().background().color());
Chris@0: 	    for (int dx = -1; dx <= 1; ++dx) {
Chris@0: 		for (int dy = -1; dy <= 1; ++dy) {
Chris@0: 		    if ((dx && dy) || !(dx || dy)) continue;
Chris@0: 		    paint.drawText(x + dx, y + dy, text);
Chris@0: 		}
Chris@0: 	    }
Chris@0: 	    paint.setPen(QColor(50, 50, 50));
Chris@0: 	} else {
Chris@0: 	    paint.setPen(QColor(200, 200, 200));
Chris@0: 	}
Chris@0: 	paint.drawText(x, y, text);
Chris@0:     }
Chris@0: 
Chris@0:     if (m_clickedInRange && m_shiftPressed) {
Chris@19: 	if (m_manager && (m_manager->getToolMode() == ViewManager::NavigateMode)) {
Chris@19: 	    //!!! be nice if this looked a bit more in keeping with the
Chris@19: 	    //selection block
Chris@19: 	    paint.setPen(Qt::blue);
Chris@19: 	    paint.drawRect(m_clickPos.x(), m_clickPos.y(),
Chris@19: 			   m_mousePos.x() - m_clickPos.x(),
Chris@19: 			   m_mousePos.y() - m_clickPos.y());
Chris@19: 	}
Chris@0:     }
Chris@0:     
Chris@0:     paint.end();
Chris@0: }
Chris@0: 
Chris@17: Selection
Chris@17: Pane::getSelectionAt(int x, bool &closeToLeftEdge, bool &closeToRightEdge)
Chris@17: {
Chris@17:     closeToLeftEdge = closeToRightEdge = false;
Chris@17: 
Chris@17:     if (!m_manager) return Selection();
Chris@17: 
Chris@20:     long testFrame = getFrameForX(x - 5);
Chris@17:     if (testFrame < 0) {
Chris@20: 	testFrame = getFrameForX(x);
Chris@17: 	if (testFrame < 0) return Selection();
Chris@17:     }
Chris@17: 
Chris@17:     Selection selection = m_manager->getContainingSelection(testFrame, true);
Chris@17:     if (selection.isEmpty()) return selection;
Chris@17: 
Chris@20:     int lx = getXForFrame(selection.getStartFrame());
Chris@20:     int rx = getXForFrame(selection.getEndFrame());
Chris@17:     
Chris@17:     int fuzz = 2;
Chris@17:     if (x < lx - fuzz || x > rx + fuzz) return Selection();
Chris@17: 
Chris@17:     int width = rx - lx;
Chris@17:     fuzz = 3;
Chris@17:     if (width < 12) fuzz = width / 4;
Chris@17:     if (fuzz < 1) fuzz = 1;
Chris@17: 
Chris@17:     if (x < lx + fuzz) closeToLeftEdge = true;
Chris@17:     if (x > rx - fuzz) closeToRightEdge = true;
Chris@17: 
Chris@17:     return selection;
Chris@17: }
Chris@17: 
Chris@0: void
Chris@0: Pane::mousePressEvent(QMouseEvent *e)
Chris@0: {
Chris@0:     m_clickPos = e->pos();
Chris@0:     m_clickedInRange = true;
Chris@0:     m_shiftPressed = (e->modifiers() & Qt::ShiftModifier);
Chris@13:     m_ctrlPressed = (e->modifiers() & Qt::ControlModifier);
Chris@13: 
Chris@13:     ViewManager::ToolMode mode = ViewManager::NavigateMode;
Chris@13:     if (m_manager) mode = m_manager->getToolMode();
Chris@13: 
Chris@17:     m_navigating = false;
Chris@13: 
Chris@17:     if (mode == ViewManager::NavigateMode || (e->buttons() & Qt::MidButton)) {
Chris@17: 
Chris@17: 	if (mode != ViewManager::NavigateMode) {
Chris@17: 	    setCursor(Qt::PointingHandCursor);
Chris@17: 	}
Chris@17: 
Chris@17: 	m_navigating = true;
Chris@13: 	m_dragCentreFrame = m_centreFrame;
Chris@13: 
Chris@13:     } else if (mode == ViewManager::SelectMode) {
Chris@13: 
Chris@17: 	bool closeToLeft = false, closeToRight = false;
Chris@17: 	Selection selection = getSelectionAt(e->x(), closeToLeft, closeToRight);
Chris@17: 
Chris@17: 	if ((closeToLeft || closeToRight) && !(closeToLeft && closeToRight)) {
Chris@17: 
Chris@17: 	    m_manager->removeSelection(selection);
Chris@17: 
Chris@17: 	    if (closeToLeft) {
Chris@17: 		m_selectionStartFrame = selection.getEndFrame();
Chris@17: 	    } else {
Chris@17: 		m_selectionStartFrame = selection.getStartFrame();
Chris@17: 	    }
Chris@17: 
Chris@17: 	    m_manager->setInProgressSelection(selection, false);
Chris@17: 	    m_resizing = true;
Chris@13: 	
Chris@17: 	} else {
Chris@17: 
Chris@20: 	    int mouseFrame = getFrameForX(e->x());
Chris@17: 	    size_t resolution = 1;
Chris@17: 	    int snapFrame = mouseFrame;
Chris@17: 	
Chris@17: 	    Layer *layer = getSelectedLayer();
Chris@17: 	    if (layer) {
Chris@17: 		snapFrame = layer->getNearestFeatureFrame(mouseFrame, resolution,
Chris@17: 							  false);
Chris@17: 	    }
Chris@17: 	    
Chris@17: 	    if (snapFrame < 0) snapFrame = 0;
Chris@17: 	    m_selectionStartFrame = snapFrame;
Chris@17: 	    if (m_manager) {
Chris@17: 		m_manager->setInProgressSelection(Selection(snapFrame,
Chris@17: 							    snapFrame + resolution),
Chris@17: 						  !m_ctrlPressed);
Chris@17: 	    }
Chris@17: 
Chris@17: 	    m_resizing = false;
Chris@17: 	}
Chris@17: 
Chris@17: 	update();
Chris@17: 
Chris@17:     } else if (mode == ViewManager::DrawMode) {
Chris@17: 
Chris@13: 	Layer *layer = getSelectedLayer();
Chris@23: 	if (layer && layer->isLayerEditable()) {
Chris@17: 	    layer->drawStart(e);
Chris@13: 	}
Chris@18: 
Chris@18:     } else if (mode == ViewManager::EditMode) {
Chris@18: 
Chris@18: 	Layer *layer = getSelectedLayer();
Chris@23: 	if (layer && layer->isLayerEditable()) {
Chris@18: 	    layer->editStart(e);
Chris@18: 	}
Chris@13:     }
Chris@0: 
Chris@0:     emit paneInteractedWith();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mouseReleaseEvent(QMouseEvent *e)
Chris@0: {
Chris@13:     ViewManager::ToolMode mode = ViewManager::NavigateMode;
Chris@13:     if (m_manager) mode = m_manager->getToolMode();
Chris@13: 
Chris@0:     if (m_clickedInRange) {
Chris@0: 	mouseMoveEvent(e);
Chris@0:     }
Chris@0: 
Chris@17:     if (m_navigating || mode == ViewManager::NavigateMode) {
Chris@17: 
Chris@17: 	m_navigating = false;
Chris@17: 
Chris@17: 	if (mode != ViewManager::NavigateMode) {
Chris@17: 	    // restore cursor
Chris@17: 	    toolModeChanged();
Chris@17: 	}
Chris@0: 
Chris@13: 	if (m_shiftPressed) {
Chris@0: 
Chris@13: 	    int x0 = std::min(m_clickPos.x(), m_mousePos.x());
Chris@13: 	    int x1 = std::max(m_clickPos.x(), m_mousePos.x());
Chris@13: 	    int w = x1 - x0;
Chris@13: 	    
Chris@20: 	    long newStartFrame = getFrameForX(x0);
Chris@13: 	    
Chris@20: 	    long visibleFrames = getEndFrame() - getStartFrame();
Chris@20: 	    if (newStartFrame <= -visibleFrames) {
Chris@20: 		newStartFrame  = -visibleFrames + 1;
Chris@13: 	    }
Chris@13: 	    
Chris@13: 	    if (newStartFrame >= long(getModelsEndFrame())) {
Chris@13: 		newStartFrame  = getModelsEndFrame() - 1;
Chris@13: 	    }
Chris@13: 	    
Chris@13: 	    float ratio = float(w) / float(width());
Chris@13: //	std::cerr << "ratio: " << ratio << std::endl;
Chris@13: 	    size_t newZoomLevel = (size_t)nearbyint(m_zoomLevel * ratio);
Chris@13: 	    if (newZoomLevel < 1) newZoomLevel = 1;
Chris@13: 
Chris@13: //	std::cerr << "start: " << m_startFrame << ", level " << m_zoomLevel << std::endl;
Chris@13: 	    setZoomLevel(getZoomConstraintBlockSize(newZoomLevel));
Chris@13: 	    setStartFrame(newStartFrame);
Chris@13: 
Chris@13: 	    //cerr << "mouseReleaseEvent: start frame now " << m_startFrame << endl;
Chris@13: //	update();
Chris@0: 	}
Chris@0: 
Chris@13:     } else if (mode == ViewManager::SelectMode) {
Chris@13: 
Chris@13: 	if (m_manager && m_manager->haveInProgressSelection()) {
Chris@13: 
Chris@13: 	    bool exclusive;
Chris@13: 	    Selection selection = m_manager->getInProgressSelection(exclusive);
Chris@13: 	    
Chris@13: 	    if (selection.getEndFrame() < selection.getStartFrame() + 2) {
Chris@13: 		selection = Selection();
Chris@13: 	    }
Chris@13: 	    
Chris@13: 	    m_manager->clearInProgressSelection();
Chris@13: 	    
Chris@13: 	    if (exclusive) {
Chris@13: 		m_manager->setSelection(selection);
Chris@13: 	    } else {
Chris@13: 		m_manager->addSelection(selection);
Chris@13: 	    }
Chris@0: 	}
Chris@13: 	
Chris@13: 	update();
Chris@17: 
Chris@17:     } else if (mode == ViewManager::DrawMode) {
Chris@17: 
Chris@17: 	Layer *layer = getSelectedLayer();
Chris@23: 	if (layer && layer->isLayerEditable()) {
Chris@17: 	    layer->drawEnd(e);
Chris@17: 	    update();
Chris@17: 	}
Chris@18: 
Chris@18:     } else if (mode == ViewManager::EditMode) {
Chris@18: 
Chris@18: 	Layer *layer = getSelectedLayer();
Chris@23: 	if (layer && layer->isLayerEditable()) {
Chris@18: 	    layer->editEnd(e);
Chris@18: 	    update();
Chris@18: 	}
Chris@17:     }
Chris@0: 
Chris@0:     m_clickedInRange = false;
Chris@0: 
Chris@0:     emit paneInteractedWith();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mouseMoveEvent(QMouseEvent *e)
Chris@0: {
Chris@13:     ViewManager::ToolMode mode = ViewManager::NavigateMode;
Chris@13:     if (m_manager) mode = m_manager->getToolMode();
Chris@13: 
Chris@0:     if (!m_clickedInRange) {
Chris@0: 	
Chris@17: 	if (mode == ViewManager::SelectMode) {
Chris@17: 	    bool closeToLeft = false, closeToRight = false;
Chris@17: 	    getSelectionAt(e->x(), closeToLeft, closeToRight);
Chris@17: 	    if ((closeToLeft || closeToRight) && !(closeToLeft && closeToRight)) {
Chris@17: 		setCursor(Qt::SizeHorCursor);
Chris@17: 	    } else {
Chris@17: 		setCursor(Qt::ArrowCursor);
Chris@17: 	    }
Chris@17: 	}
Chris@0: 
Chris@17: 	if (mode != ViewManager::DrawMode) {
Chris@0: 
Chris@17: 	    bool previouslyIdentifying = m_identifyFeatures;
Chris@17: 	    QPoint prevPoint = m_identifyPoint;
Chris@0: 
Chris@17: 	    m_identifyFeatures = true;
Chris@17: 	    m_identifyPoint = e->pos();
Chris@17: 	    
Chris@17: 	    if (m_identifyFeatures != previouslyIdentifying ||
Chris@17: 		m_identifyPoint != prevPoint) {
Chris@17: 		update();
Chris@17: 	    }
Chris@0: 	}
Chris@0: 
Chris@13: 	return;
Chris@13:     }
Chris@0: 
Chris@17:     if (m_navigating || mode == ViewManager::NavigateMode) {
Chris@0: 
Chris@13: 	if (m_shiftPressed) {
Chris@0: 
Chris@13: 	    m_mousePos = e->pos();
Chris@13: 	    update();
Chris@0: 
Chris@0: 	} else {
Chris@13: 
Chris@20: 	    long frameOff = getFrameForX(e->x()) - getFrameForX(m_clickPos.x());
Chris@20: 
Chris@13: 	    size_t newCentreFrame = m_dragCentreFrame;
Chris@13: 	    
Chris@13: 	    if (frameOff < 0) {
Chris@13: 		newCentreFrame -= frameOff;
Chris@13: 	    } else if (newCentreFrame >= size_t(frameOff)) {
Chris@13: 		newCentreFrame -= frameOff;
Chris@13: 	    } else {
Chris@13: 		newCentreFrame = 0;
Chris@13: 	    }
Chris@13: 	    
Chris@13: 	    if (newCentreFrame >= getModelsEndFrame()) {
Chris@13: 		newCentreFrame = getModelsEndFrame();
Chris@13: 		if (newCentreFrame > 0) --newCentreFrame;
Chris@13: 	    }
Chris@20: 
Chris@20: 	    if (getXForFrame(m_centreFrame) != getXForFrame(newCentreFrame)) {
Chris@13: 		setCentreFrame(newCentreFrame);
Chris@13: 	    }
Chris@0: 	}
Chris@0: 
Chris@13:     } else if (mode == ViewManager::SelectMode) {
Chris@13: 
Chris@20: 	int mouseFrame = getFrameForX(e->x());
Chris@13: 	size_t resolution = 1;
Chris@13: 	int snapFrameLeft = mouseFrame;
Chris@13: 	int snapFrameRight = mouseFrame;
Chris@13: 	
Chris@13: 	Layer *layer = getSelectedLayer();
Chris@13: 	if (layer) {
Chris@13: 	    snapFrameLeft = layer->getNearestFeatureFrame(mouseFrame, resolution,
Chris@13: 							  false);
Chris@13: 	    snapFrameRight = layer->getNearestFeatureFrame(mouseFrame, resolution,
Chris@13: 							   true);
Chris@13: 	}
Chris@13: 	
Chris@13: 	if (snapFrameLeft < 0) snapFrameLeft = 0;
Chris@13: 	if (snapFrameRight < 0) snapFrameRight = 0;
Chris@13: 	
Chris@13: 	size_t min, max;
Chris@13: 	
Chris@13: 	if (m_selectionStartFrame > snapFrameLeft) {
Chris@13: 	    min = snapFrameLeft;
Chris@13: 	    max = m_selectionStartFrame;
Chris@13: 	} else if (snapFrameRight > m_selectionStartFrame) {
Chris@13: 	    min = m_selectionStartFrame;
Chris@13: 	    max = snapFrameRight;
Chris@13: 	} else {
Chris@13: 	    min = snapFrameLeft;
Chris@13: 	    max = snapFrameRight;
Chris@0: 	}
Chris@0: 
Chris@13: 	if (m_manager) {
Chris@13: 	    m_manager->setInProgressSelection(Selection(min, max),
Chris@17: 					      !m_resizing && !m_ctrlPressed);
Chris@0: 	}
Chris@15: 
Chris@15: 	bool doScroll = false;
Chris@15: 	if (!m_manager) doScroll = true;
Chris@15: 	if (!m_manager->isPlaying()) doScroll = true;
Chris@15: 	if (m_followPlay != PlaybackScrollContinuous) doScroll = true;
Chris@15: 
Chris@15: 	if (doScroll) {
Chris@13: 	    int offset = mouseFrame - getStartFrame();
Chris@13: 	    int available = getEndFrame() - getStartFrame();
Chris@15: 	    if (offset >= available * 0.95) {
Chris@15: 		int move = int(offset - available * 0.95) + 1;
Chris@14: 		setCentreFrame(m_centreFrame + move);
Chris@15: 	    } else if (offset <= available * 0.10) {
Chris@15: 		int move = int(available * 0.10 - offset) + 1;
Chris@14: 		if (m_centreFrame > move) {
Chris@14: 		    setCentreFrame(m_centreFrame - move);
Chris@14: 		} else {
Chris@14: 		    setCentreFrame(0);
Chris@14: 		}
Chris@13: 	    }
Chris@13: 	}
Chris@13: 
Chris@13: 	update();
Chris@17: 
Chris@17:     } else if (mode == ViewManager::DrawMode) {
Chris@17: 
Chris@17: 	Layer *layer = getSelectedLayer();
Chris@23: 	if (layer && layer->isLayerEditable()) {
Chris@17: 	    layer->drawDrag(e);
Chris@17: 	}
Chris@18: 
Chris@18:     } else if (mode == ViewManager::EditMode) {
Chris@18: 
Chris@18: 	Layer *layer = getSelectedLayer();
Chris@23: 	if (layer && layer->isLayerEditable()) {
Chris@18: 	    layer->editDrag(e);
Chris@18: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::mouseDoubleClickEvent(QMouseEvent *e)
Chris@0: {
Chris@0:     std::cerr << "mouseDoubleClickEvent" << std::endl;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::leaveEvent(QEvent *)
Chris@0: {
Chris@0:     bool previouslyIdentifying = m_identifyFeatures;
Chris@0:     m_identifyFeatures = false;
Chris@0:     if (previouslyIdentifying) update();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Pane::wheelEvent(QWheelEvent *e)
Chris@0: {
Chris@0:     //std::cerr << "wheelEvent, delta " << e->delta() << std::endl;
Chris@0: 
Chris@0:     int count = e->delta();
Chris@0: 
Chris@0:     if (count > 0) {
Chris@0: 	if (count >= 120) count /= 120;
Chris@0: 	else count = 1;
Chris@0:     } 
Chris@0: 
Chris@0:     if (count < 0) {
Chris@0: 	if (count <= -120) count /= 120;
Chris@0: 	else count = -1;
Chris@0:     }
Chris@17: 
Chris@17:     if (e->modifiers() & Qt::ControlModifier) {
Chris@17: 
Chris@20: 	// Scroll left or right, rapidly
Chris@20: 
Chris@17: 	if (getStartFrame() < 0 && 
Chris@17: 	    getEndFrame() >= getModelsEndFrame()) return;
Chris@17: 
Chris@17: 	long delta = ((width() / 2) * count * m_zoomLevel);
Chris@17: 
Chris@17: 	if (int(m_centreFrame) < delta) {
Chris@17: 	    setCentreFrame(0);
Chris@17: 	} else if (int(m_centreFrame) - delta >= int(getModelsEndFrame())) {
Chris@17: 	    setCentreFrame(getModelsEndFrame());
Chris@17: 	} else {
Chris@17: 	    setCentreFrame(m_centreFrame - delta);
Chris@17: 	}
Chris@17: 
Chris@17:     } else {
Chris@17: 
Chris@20: 	// Zoom in or out
Chris@20: 
Chris@17: 	int newZoomLevel = m_zoomLevel;
Chris@0:   
Chris@17: 	while (count > 0) {
Chris@17: 	    if (newZoomLevel <= 2) {
Chris@17: 		newZoomLevel = 1;
Chris@17: 		break;
Chris@17: 	    }
Chris@17: 	    newZoomLevel = getZoomConstraintBlockSize(newZoomLevel - 1, 
Chris@17: 						      ZoomConstraint::RoundDown);
Chris@17: 	    --count;
Chris@0: 	}
Chris@17: 	
Chris@17: 	while (count < 0) {
Chris@17: 	    newZoomLevel = getZoomConstraintBlockSize(newZoomLevel + 1,
Chris@17: 						      ZoomConstraint::RoundUp);
Chris@17: 	    ++count;
Chris@17: 	}
Chris@17: 	
Chris@17: 	if (newZoomLevel != m_zoomLevel) {
Chris@17: 	    setZoomLevel(newZoomLevel);
Chris@17: 	}
Chris@0:     }
Chris@0: 
Chris@0:     emit paneInteractedWith();
Chris@0: }
Chris@8: 
Chris@13: void
Chris@13: Pane::toolModeChanged()
Chris@13: {
Chris@13:     ViewManager::ToolMode mode = m_manager->getToolMode();
Chris@13:     std::cerr << "Pane::toolModeChanged(" << mode << ")" << std::endl;
Chris@13: 
Chris@13:     switch (mode) {
Chris@13: 
Chris@13:     case ViewManager::NavigateMode:
Chris@13: 	setCursor(Qt::PointingHandCursor);
Chris@13: 	break;
Chris@13: 	
Chris@13:     case ViewManager::SelectMode:
Chris@13: 	setCursor(Qt::ArrowCursor);
Chris@13: 	break;
Chris@13: 	
Chris@13:     case ViewManager::EditMode:
Chris@19: 	setCursor(Qt::UpArrowCursor);
Chris@13: 	break;
Chris@13: 	
Chris@13:     case ViewManager::DrawMode:
Chris@13: 	setCursor(Qt::CrossCursor);
Chris@13: 	break;
Chris@13: 	
Chris@13:     case ViewManager::TextMode:
Chris@13: 	setCursor(Qt::IBeamCursor);
Chris@13: 	break;
Chris@13:     }
Chris@13: }
Chris@13: 
Chris@8: QString
Chris@8: Pane::toXmlString(QString indent, QString extraAttributes) const
Chris@8: {
Chris@8:     return View::toXmlString
Chris@8: 	(indent,
Chris@8: 	 QString("type=\"pane\" centreLineVisible=\"%1\" %2")
Chris@8: 	 .arg(m_centreLineVisible).arg(extraAttributes));
Chris@8: }
Chris@8: 
Chris@0: 
Chris@0: #ifdef INCLUDE_MOCFILES
Chris@0: #include "Pane.moc.cpp"
Chris@0: #endif
Chris@0: