diff -r 000000000000 -r 1918ee327afb tests/manual/gestures/scrollarea/main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tests/manual/gestures/scrollarea/main.cpp Mon Jan 11 14:00:40 2010 +0000 @@ -0,0 +1,229 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the test suite 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 Technology Preview License Agreement accompanying +** this package. +** +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include + +#include "mousepangesturerecognizer.h" + +class ScrollArea : public QScrollArea +{ + Q_OBJECT +public: + ScrollArea(QWidget *parent = 0) + : QScrollArea(parent), outside(false) + { + viewport()->grabGesture(Qt::PanGesture); + } + +protected: + bool viewportEvent(QEvent *event) + { + if (event->type() == QEvent::Gesture) { + gestureEvent(static_cast(event)); + return true; + } else if (event->type() == QEvent::GestureOverride) { + QGestureEvent *ge = static_cast(event); + if (QPanGesture *pan = static_cast(ge->gesture(Qt::PanGesture))) + if (pan->state() == Qt::GestureStarted) { + outside = false; + } + } + return QScrollArea::viewportEvent(event); + } + void gestureEvent(QGestureEvent *event) + { + QPanGesture *pan = static_cast(event->gesture(Qt::PanGesture)); + if (pan) { + switch(pan->state()) { + case Qt::GestureStarted: qDebug("area: Pan: started"); break; + case Qt::GestureFinished: qDebug("area: Pan: finished"); break; + case Qt::GestureCanceled: qDebug("area: Pan: canceled"); break; + case Qt::GestureUpdated: break; + default: qDebug("area: Pan: "); break; + } + + if (pan->state() == Qt::GestureStarted) + outside = false; + event->ignore(); + event->ignore(pan); + if (outside) + return; + + const QPointF offset = pan->offset(); + const QPointF totalOffset = pan->totalOffset(); + QScrollBar *vbar = verticalScrollBar(); + QScrollBar *hbar = horizontalScrollBar(); + + if ((vbar->value() == vbar->minimum() && totalOffset.y() > 10) || + (vbar->value() == vbar->maximum() && totalOffset.y() < -10)) { + outside = true; + return; + } + if ((hbar->value() == hbar->minimum() && totalOffset.x() > 10) || + (hbar->value() == hbar->maximum() && totalOffset.x() < -10)) { + outside = true; + return; + } + vbar->setValue(vbar->value() - offset.y()); + hbar->setValue(hbar->value() - offset.x()); + event->accept(pan); + } + } + +private: + bool outside; +}; + +class Slider : public QSlider +{ +public: + Slider(Qt::Orientation orientation, QWidget *parent = 0) + : QSlider(orientation, parent) + { + grabGesture(Qt::PanGesture); + } +protected: + bool event(QEvent *event) + { + if (event->type() == QEvent::Gesture) { + gestureEvent(static_cast(event)); + return true; + } + return QSlider::event(event); + } + void gestureEvent(QGestureEvent *event) + { + QPanGesture *pan = static_cast(event->gesture(Qt::PanGesture)); + if (pan) { + switch (pan->state()) { + case Qt::GestureStarted: qDebug("slider: Pan: started"); break; + case Qt::GestureFinished: qDebug("slider: Pan: finished"); break; + case Qt::GestureCanceled: qDebug("slider: Pan: canceled"); break; + case Qt::GestureUpdated: break; + default: qDebug("slider: Pan: "); break; + } + + if (pan->state() == Qt::GestureStarted) + outside = false; + event->ignore(); + event->ignore(pan); + if (outside) + return; + const QPointF offset = pan->offset(); + const QPointF totalOffset = pan->totalOffset(); + if (orientation() == Qt::Horizontal) { + if ((value() == minimum() && totalOffset.x() < -10) || + (value() == maximum() && totalOffset.x() > 10)) { + outside = true; + return; + } + if (totalOffset.y() < 40 && totalOffset.y() > -40) { + setValue(value() + offset.x()); + event->accept(pan); + } else { + outside = true; + } + } else if (orientation() == Qt::Vertical) { + if ((value() == maximum() && totalOffset.y() < -10) || + (value() == minimum() && totalOffset.y() > 10)) { + outside = true; + return; + } + if (totalOffset.x() < 40 && totalOffset.x() > -40) { + setValue(value() - offset.y()); + event->accept(pan); + } else { + outside = true; + } + } + } + } +private: + bool outside; +}; + +class MainWindow : public QMainWindow +{ +public: + MainWindow() + { + rootScrollArea = new ScrollArea; + setCentralWidget(rootScrollArea); + + QWidget *root = new QWidget; + root->setFixedSize(3000, 3000); + rootScrollArea->setWidget(root); + + Slider *verticalSlider = new Slider(Qt::Vertical, root); + verticalSlider ->move(650, 1100); + Slider *horizontalSlider = new Slider(Qt::Horizontal, root); + horizontalSlider ->move(600, 1000); + + childScrollArea = new ScrollArea(root); + childScrollArea->move(500, 500); + QWidget *w = new QWidget; + w->setMinimumWidth(400); + QVBoxLayout *l = new QVBoxLayout(w); + l->setMargin(20); + for (int i = 0; i < 100; ++i) { + QWidget *w = new QWidget; + QHBoxLayout *ll = new QHBoxLayout(w); + ll->addWidget(new QLabel(QString("Label %1").arg(i))); + ll->addWidget(new QPushButton(QString("Button %1").arg(i))); + l->addWidget(w); + } + childScrollArea->setWidget(w); + } +private: + ScrollArea *rootScrollArea; + ScrollArea *childScrollArea; +}; + +int main(int argc, char **argv) +{ + QApplication app(argc, argv); + app.registerGestureRecognizer(new MousePanGestureRecognizer); + MainWindow w; + w.show(); + return app.exec(); +} + +#include "main.moc"