Chris@57: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@45: 
cannam@45: /*
Chris@57:     EasyMercurial
cannam@45: 
Chris@57:     Based on HgExplorer by Jari Korhonen
Chris@57:     Copyright (c) 2010 Jari Korhonen
Chris@57:     Copyright (c) 2010 Chris Cannam
Chris@57:     Copyright (c) 2010 Queen Mary, University of London
Chris@57:     
cannam@45:     This program is free software; you can redistribute it and/or
cannam@45:     modify it under the terms of the GNU General Public License as
cannam@45:     published by the Free Software Foundation; either version 2 of the
cannam@45:     License, or (at your option) any later version.  See the file
cannam@45:     COPYING included with this distribution for more information.
cannam@45: */
cannam@45: 
cannam@45: #include "panned.h"
Chris@131: #include "debug.h"
cannam@45: 
cannam@45: #include <QScrollBar>
Chris@53: #include <QWheelEvent>
cannam@45: 
cannam@45: #include <iostream>
cannam@45: 
cannam@45: Panned::Panned()
cannam@45: {
Chris@56:     setRenderHints(QPainter::Antialiasing |
Chris@56:                    QPainter::TextAntialiasing);
cannam@45: }
cannam@45: 
cannam@45: void
cannam@45: Panned::resizeEvent(QResizeEvent *ev)
cannam@45: {
Chris@131:     DEBUG << "Panned::resizeEvent()" << endl;
Chris@131: 
Chris@60:     QPointF nearpt = mapToScene(0, 0);
Chris@60:     QPointF farpt = mapToScene(width(), height());
Chris@60:     QSizeF sz(farpt.x()-nearpt.x(), farpt.y()-nearpt.y());
Chris@60:     QRectF pr(nearpt, sz);
cannam@45: 
Chris@132:     QGraphicsView::resizeEvent(ev);
Chris@132: 
cannam@45:     if (pr != m_pannedRect) {
Chris@132:         DEBUG << "Panned: setting panned rect to " << pr << endl;
cannam@45:         m_pannedRect = pr;
Chris@133:         centerOn(pr.center());
Chris@133:         emit pannedRectChanged(pr);
Chris@133:     }
Chris@133: }
Chris@133: 
Chris@133: void
Chris@133: Panned::setScene(QGraphicsScene *s)
Chris@133: {
Chris@133:     if (!scene()) {
Chris@133:         QGraphicsView::setScene(s);
Chris@133:         return;
Chris@133:     }
Chris@133: 
Chris@133:     QPointF nearpt = mapToScene(0, 0);
Chris@133:     QPointF farpt = mapToScene(width(), height());
Chris@133:     QSizeF sz(farpt.x()-nearpt.x(), farpt.y()-nearpt.y());
Chris@133:     QRectF pr(nearpt, sz);
Chris@133: 
Chris@133:     QGraphicsView::setScene(s);
Chris@133: 
Chris@133:     DEBUG << "Panned::setScene: pr = " << pr << ", sceneRect = " << sceneRect() << endl;
Chris@133: 
Chris@133:     if (scene() && sceneRect().intersects(pr)) {
Chris@133:         DEBUG << "Panned::setScene: restoring old rect " << pr << endl;
Chris@133:         m_pannedRect = pr;
Chris@133:         centerOn(pr.center());
cannam@45:         emit pannedRectChanged(pr);
cannam@45:     }
cannam@45: }
cannam@45: 
cannam@45: void
cannam@45: Panned::paintEvent(QPaintEvent *e)
cannam@45: {
cannam@45:     QGraphicsView::paintEvent(e);
cannam@45: }
cannam@45: 
cannam@45: void
cannam@45: Panned::drawForeground(QPainter *paint, const QRectF &)
cannam@45: {
Chris@60:     QPointF nearpt = mapToScene(0, 0);
Chris@60:     QPointF farpt = mapToScene(width(), height());
Chris@60:     QSizeF sz(farpt.x()-nearpt.x(), farpt.y()-nearpt.y());
Chris@60:     QRectF pr(nearpt, sz);
cannam@45: 
cannam@45:     if (pr != m_pannedRect) {
Chris@133:         DEBUG << "Panned::drawForeground: visible rect " << pr << " differs from panned rect " << m_pannedRect << ", updating panned rect" <<endl;
cannam@45:         if (pr.x() != m_pannedRect.x()) emit pannedContentsScrolled();
cannam@45:         m_pannedRect = pr;
cannam@45:         emit pannedRectChanged(pr);
cannam@45:     }
cannam@45: }
cannam@45: 
cannam@45: void
Chris@53: Panned::zoomIn()
Chris@53: {
Chris@53:     QMatrix m = matrix();
Chris@53:     m.scale(1.0 / 1.1, 1.0 / 1.1);
Chris@53:     setMatrix(m);
Chris@53: }
Chris@53: 
Chris@53: void
Chris@53: Panned::zoomOut()
Chris@53: {
Chris@53:     QMatrix m = matrix();
Chris@53:     m.scale(1.1, 1.1);
Chris@53:     setMatrix(m);
Chris@53: }
Chris@53: 
Chris@53: void
cannam@45: Panned::slotSetPannedRect(QRectF pr)
cannam@45: {
cannam@45:     centerOn(pr.center());
cannam@45: //	setSceneRect(pr);
cannam@45: //	m_pannedRect = pr;
cannam@45: }
cannam@45: 
cannam@45: void
cannam@45: Panned::wheelEvent(QWheelEvent *ev)
cannam@45: {
Chris@53:     if (ev->modifiers() & Qt::ControlModifier) {
Chris@53:         int d = ev->delta();
Chris@53:         if (d > 0) {
Chris@53:             while (d > 0) {
Chris@53:                 zoomOut();
Chris@53:                 d -= 120;
Chris@53:             }
Chris@53:         } else {
Chris@53:             while (d < 0) {
Chris@53:                 zoomIn();
Chris@53:                 d += 120;
Chris@53:             }
Chris@53:         }
Chris@53:     } else {
Chris@53:         emit wheelEventReceived(ev);
Chris@53:         QGraphicsView::wheelEvent(ev);
Chris@53:     }
cannam@45: }
cannam@45: 
cannam@45: void
cannam@45: Panned::slotEmulateWheelEvent(QWheelEvent *ev)
cannam@45: {
cannam@45:     QGraphicsView::wheelEvent(ev);
cannam@45: }
cannam@45: 
cannam@45: void
cannam@45: Panned::leaveEvent(QEvent *)
cannam@45: {
cannam@45:     emit mouseLeaves();
cannam@45: }