Mercurial > hg > easyhg
view panned.cpp @ 57:f583e44d9d31
* Update copyrights; add debug header
author | Chris Cannam |
---|---|
date | Tue, 16 Nov 2010 13:57:30 +0000 |
parents | 1394c8cbf991 |
children | 73073f34a5ee |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* EasyMercurial Based on HgExplorer by Jari Korhonen Copyright (c) 2010 Jari Korhonen Copyright (c) 2010 Chris Cannam Copyright (c) 2010 Queen Mary, University of London 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 "panned.h" #include <QScrollBar> #include <QGLWidget> #include <QWheelEvent> #include <iostream> Panned::Panned() { setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing); } void Panned::resizeEvent(QResizeEvent *ev) { QPointF near = mapToScene(0, 0); QPointF far = mapToScene(width(), height()); QSizeF sz(far.x()-near.x(), far.y()-near.y()); QRectF pr(near, sz); if (pr != m_pannedRect) { m_pannedRect = pr; emit pannedRectChanged(pr); } QGraphicsView::resizeEvent(ev); } void Panned::paintEvent(QPaintEvent *e) { QGraphicsView::paintEvent(e); } void Panned::drawForeground(QPainter *paint, const QRectF &) { QPointF near = mapToScene(0, 0); QPointF far = mapToScene(width(), height()); QSizeF sz(far.x()-near.x(), far.y()-near.y()); QRectF pr(near, sz); if (pr != m_pannedRect) { if (pr.x() != m_pannedRect.x()) emit pannedContentsScrolled(); m_pannedRect = pr; emit pannedRectChanged(pr); } } void Panned::zoomIn() { QMatrix m = matrix(); m.scale(1.0 / 1.1, 1.0 / 1.1); setMatrix(m); } void Panned::zoomOut() { QMatrix m = matrix(); m.scale(1.1, 1.1); setMatrix(m); } void Panned::slotSetPannedRect(QRectF pr) { centerOn(pr.center()); // setSceneRect(pr); // m_pannedRect = pr; } void Panned::wheelEvent(QWheelEvent *ev) { if (ev->modifiers() & Qt::ControlModifier) { int d = ev->delta(); if (d > 0) { while (d > 0) { zoomOut(); d -= 120; } } else { while (d < 0) { zoomIn(); d += 120; } } } else { emit wheelEventReceived(ev); QGraphicsView::wheelEvent(ev); } } void Panned::slotEmulateWheelEvent(QWheelEvent *ev) { QGraphicsView::wheelEvent(ev); } void Panned::leaveEvent(QEvent *) { emit mouseLeaves(); }