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Diffstat (limited to 'examples/gestures/collidingmice/main.cpp')
| -rw-r--r-- | examples/gestures/collidingmice/main.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/examples/gestures/collidingmice/main.cpp b/examples/gestures/collidingmice/main.cpp new file mode 100644 index 000000000..363844204 --- /dev/null +++ b/examples/gestures/collidingmice/main.cpp @@ -0,0 +1,163 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "mouse.h" + +#include "gesturerecognizerlinjazax.h" +#include "linjazaxgesture.h" + +#include <QtGui> + +#include <math.h> + +#define ZOOMING_ANIMATION +#ifdef ZOOMING_ANIMATION +static const int AnimationSteps = 10; +#endif + +static const int MouseCount = 7; + +class PannableGraphicsView : public QGraphicsView +{ + Q_OBJECT +public: + PannableGraphicsView(QGraphicsScene *scene, QWidget *parent = 0) + : QGraphicsView(scene, parent) + { + grabGesture(QLatin1String("LinjaZax")); +#ifdef ZOOMING_ANIMATION + timeline = new QTimeLine(700, this); + timeline->setFrameRange(0, AnimationSteps); + connect(timeline, SIGNAL(frameChanged(int)), this, SLOT(animationStep(int))); +#endif + } +protected: + bool event(QEvent *event) + { + if (event->type() == QEvent::Gesture) { + QGestureEvent *ge = static_cast<QGestureEvent*>(event); + const LinjaZaxGesture *g = static_cast<const LinjaZaxGesture*>(ge->gesture("LinjaZax")); + if (g) { + switch (g->zoomState()) { + case LinjaZaxGesture::ZoomingIn: +#ifdef ZOOMING_ANIMATION + scaleStep = 1. + 0.5/AnimationSteps; + timeline->stop(); + timeline->start(); +#else + scale(1.5, 1.5); +#endif + break; + case LinjaZaxGesture::ZoomingOut: +#ifdef ZOOMING_ANIMATION + scaleStep = 1. - 0.5/AnimationSteps; + timeline->stop(); + timeline->start(); +#else + scale(0.6, 0.6); +#endif + break; + default: + break; + }; + QPoint pt = g->pos() - g->lastPos(); + horizontalScrollBar()->setValue(horizontalScrollBar()->value() - pt.x()); + verticalScrollBar()->setValue(verticalScrollBar()->value() - pt.y()); + event->accept(); + return true; + } + } + return QGraphicsView::event(event); + } +private slots: +#ifdef ZOOMING_ANIMATION + void animationStep(int step) + { + scale(scaleStep, scaleStep); + } +private: + qreal scaleStep; + QTimeLine *timeline; +#endif +}; + +//! [0] +int main(int argc, char **argv) +{ + QApplication app(argc, argv); + app.addGestureRecognizer(new GestureRecognizerLinjaZax); + qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); +//! [0] + +//! [1] + QGraphicsScene scene; + scene.setSceneRect(-600, -600, 1200, 1200); +//! [1] //! [2] + scene.setItemIndexMethod(QGraphicsScene::NoIndex); +//! [2] + +//! [3] + for (int i = 0; i < MouseCount; ++i) { + Mouse *mouse = new Mouse; + mouse->setPos(::sin((i * 6.28) / MouseCount) * 200, + ::cos((i * 6.28) / MouseCount) * 200); + scene.addItem(mouse); + } +//! [3] + +//! [4] + PannableGraphicsView view(&scene); + view.setRenderHint(QPainter::Antialiasing); + view.setBackgroundBrush(QPixmap(":/images/cheese.jpg")); +//! [4] //! [5] + view.setCacheMode(QGraphicsView::CacheBackground); + view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate); + //view.setDragMode(QGraphicsView::ScrollHandDrag); +//! [5] //! [6] + view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice")); + view.resize(400, 300); + view.show(); + + return app.exec(); +} +//! [6] + +#include "main.moc" |