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author | Jason Barron <jbarron@trolltech.com> | 2009-06-30 09:21:56 (GMT) |
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committer | Jason Barron <jbarron@trolltech.com> | 2009-06-30 09:21:56 (GMT) |
commit | 197df24edfe095a10e2bf65116796e027fea44e2 (patch) | |
tree | 4ffb08f614b550298663f90297c9e559ecb47a3c /examples/gestures/graphicsview/main.cpp | |
parent | 1e84894225e31adf80a7a33da7f655fb5c38ea0e (diff) | |
parent | e3c1039d4d10aa383a1f681e7dd9c1129d22d8ca (diff) | |
download | Qt-197df24edfe095a10e2bf65116796e027fea44e2.zip Qt-197df24edfe095a10e2bf65116796e027fea44e2.tar.gz Qt-197df24edfe095a10e2bf65116796e027fea44e2.tar.bz2 |
Merge commit 'qt/master-stable' into 4.6-merged
Conflicts:
.gitignore
configure.exe
src/corelib/concurrent/qtconcurrentthreadengine.h
src/corelib/global/qnamespace.h
src/gui/graphicsview/qgraphicssceneevent.h
src/gui/kernel/qapplication.cpp
src/gui/kernel/qapplication.h
src/gui/kernel/qapplication_p.h
src/gui/kernel/qapplication_qws.cpp
src/gui/kernel/qwidget.h
src/gui/painting/qpaintengine_raster.cpp
src/gui/text/qfontdatabase.cpp
src/network/access/qnetworkaccesshttpbackend.cpp
tests/auto/network-settings.h
tests/auto/qscriptjstestsuite/qscriptjstestsuite.pro
tests/auto/qvariant/tst_qvariant.cpp
Diffstat (limited to 'examples/gestures/graphicsview/main.cpp')
-rw-r--r-- | examples/gestures/graphicsview/main.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/examples/gestures/graphicsview/main.cpp b/examples/gestures/graphicsview/main.cpp new file mode 100644 index 0000000..12f4e75 --- /dev/null +++ b/examples/gestures/graphicsview/main.cpp @@ -0,0 +1,150 @@ +/**************************************************************************** +** +** 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 <QtGui> + +class PannableGraphicsView : public QGraphicsView +{ +public: + PannableGraphicsView() + { + grabGesture(Qt::PanGesture); + } +protected: + bool event(QEvent *event) + { + if (event->type() == QEvent::Gesture) { + QGestureEvent *gestureEvent = static_cast<QGestureEvent*>(event); + if (const QGesture *g = gestureEvent->gesture(Qt::PanGesture)) { + 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); + } +}; + +class ImageItem : public QGraphicsItem +{ +public: + ImageItem() + : colored(false) + { + grabGesture(Qt::DoubleTapGesture); + } + + QRectF boundingRect() const + { + return pixmap.isNull() ? QRectF(0, 0, 100, 100) + : QRectF(QPointF(0,0), QSizeF(pixmap.size())); + } + + void paint(QPainter *painter, const QStyleOptionGraphicsItem*, QWidget*) + { + if (pixmap.isNull()) { + painter->setBrush(QBrush( colored ? Qt::green : Qt::white)); + painter->drawRect(0, 0, 100, 100); + painter->drawLine(0, 0, 100, 100); + painter->drawLine(0, 100, 100, 0); + return; + } + painter->drawPixmap(0, 0, pixmap); + } + + bool sceneEvent(QEvent *event) + { + if (event->type() == QEvent::GraphicsSceneGesture) { + QGraphicsSceneGestureEvent *gestureEvent = static_cast<QGraphicsSceneGestureEvent*>(event); + if (gestureEvent->gesture(Qt::DoubleTapGesture)) { + event->accept(); + colored = !colored; + update(); + return true; + } else { + qWarning("Item received unknown gesture"); + } + } + return QGraphicsItem::sceneEvent(event); + } + +private: + QPixmap pixmap; + bool colored; +}; + +class MainWidget : public QWidget +{ + Q_OBJECT + +public: + MainWidget(QWidget *parent = 0) + : QWidget(parent) + { + QVBoxLayout *l = new QVBoxLayout(this); + view = new PannableGraphicsView; + l->addWidget(view); + scene = new QGraphicsScene(0, 0, 1024, 768, view); + view->setScene(scene); + + ImageItem *item = new ImageItem; + scene->addItem(item); + item->setPos(scene->width()/3, scene->height()/3); + } + +signals: +public slots: +private: + QGraphicsView *view; + QGraphicsScene *scene; +}; + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + MainWidget w; + w.show(); + return app.exec(); +} + +#include "main.moc" |