cannam@45: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
cannam@45: 
cannam@45: /*
cannam@45:     Rosegarden
cannam@45:     A MIDI and audio sequencer and musical notation editor.
cannam@45:     Copyright 2000-2010 the Rosegarden development team.
cannam@45: 
cannam@45:     Other copyrights also apply to some parts of this work.  Please
cannam@45:     see the AUTHORS file and individual file headers for details.
cannam@45: 
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"
cannam@45: 
cannam@45: #include <QScrollBar>
Chris@46: #include <QGLWidget>
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: {
cannam@45:     QPointF near = mapToScene(0, 0);
cannam@45:     QPointF far = mapToScene(width(), height());
cannam@45:     QSizeF sz(far.x()-near.x(), far.y()-near.y());
cannam@45:     QRectF pr(near, sz);
cannam@45: 
cannam@45:     if (pr != m_pannedRect) {
cannam@45:         m_pannedRect = pr;
cannam@45:         emit pannedRectChanged(pr);
cannam@45:     }
cannam@45: 
cannam@45:     QGraphicsView::resizeEvent(ev);
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: {
cannam@45:     QPointF near = mapToScene(0, 0);
cannam@45:     QPointF far = mapToScene(width(), height());
cannam@45:     QSizeF sz(far.x()-near.x(), far.y()-near.y());
cannam@45:     QRectF pr(near, sz);
cannam@45: 
cannam@45:     if (pr != m_pannedRect) {
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: }