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authorJason Barron <jbarron@trolltech.com>2009-06-30 09:21:56 (GMT)
committerJason Barron <jbarron@trolltech.com>2009-06-30 09:21:56 (GMT)
commit197df24edfe095a10e2bf65116796e027fea44e2 (patch)
tree4ffb08f614b550298663f90297c9e559ecb47a3c /examples/gestures/graphicsview/main.cpp
parent1e84894225e31adf80a7a33da7f655fb5c38ea0e (diff)
parente3c1039d4d10aa383a1f681e7dd9c1129d22d8ca (diff)
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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
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+/****************************************************************************
+**
+** 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"