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-rw-r--r--examples/gestures/imageviewer/imageviewer.pro13
-rw-r--r--examples/gestures/imageviewer/imagewidget.cpp80
-rw-r--r--examples/gestures/imageviewer/imagewidget.h15
-rw-r--r--examples/gestures/imageviewer/tapandholdgesture.cpp155
-rw-r--r--examples/gestures/imageviewer/tapandholdgesture.h74
5 files changed, 64 insertions, 273 deletions
diff --git a/examples/gestures/imageviewer/imageviewer.pro b/examples/gestures/imageviewer/imageviewer.pro
index 124175e..68c1f1c 100644
--- a/examples/gestures/imageviewer/imageviewer.pro
+++ b/examples/gestures/imageviewer/imageviewer.pro
@@ -1,11 +1,14 @@
-HEADERS += imagewidget.h \
- tapandholdgesture.h
+HEADERS += imagewidget.h
SOURCES += imagewidget.cpp \
- tapandholdgesture.cpp \
main.cpp
# install
target.path = $$[QT_INSTALL_EXAMPLES]/gestures/imageviewer
-sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS imageviewer.pro
+sources.files = $$SOURCES \
+ $$HEADERS \
+ $$RESOURCES \
+ $$FORMS \
+ imageviewer.pro
sources.path = $$[QT_INSTALL_EXAMPLES]/gestures/imageviewer
-INSTALLS += target sources
+INSTALLS += target \
+ sources
diff --git a/examples/gestures/imageviewer/imagewidget.cpp b/examples/gestures/imageviewer/imagewidget.cpp
index 3489b5b..5633942 100644
--- a/examples/gestures/imageviewer/imagewidget.cpp
+++ b/examples/gestures/imageviewer/imagewidget.cpp
@@ -59,24 +59,16 @@ ImageWidget::ImageWidget(QWidget *parent)
setAttribute(Qt::WA_OpaquePaintEvent);
setAttribute(Qt::WA_NoSystemBackground);
- QGesture *panGesture = new QPanGesture(this);
- connect(panGesture, SIGNAL(started()), this, SLOT(panTriggered()));
- connect(panGesture, SIGNAL(finished()), this, SLOT(panTriggered()));
- connect(panGesture, SIGNAL(canceled()), this, SLOT(panTriggered()));
- connect(panGesture, SIGNAL(triggered()), this, SLOT(panTriggered()));
-
- QGesture *pinchGesture = new QPinchGesture(this);
- connect(pinchGesture, SIGNAL(started()), this, SLOT(pinchTriggered()));
- connect(pinchGesture, SIGNAL(finished()), this, SLOT(pinchTriggered()));
- connect(pinchGesture, SIGNAL(canceled()), this, SLOT(pinchTriggered()));
- connect(pinchGesture, SIGNAL(triggered()), this, SLOT(pinchTriggered()));
-
-//! [construct swipe gesture]
- QGesture *swipeGesture = new QSwipeGesture(this);
-//! [construct swipe gesture]
-//! [connect swipe gesture]
- connect(swipeGesture, SIGNAL(triggered()), this, SLOT(swipeTriggered()));
-//! [connect swipe gesture]
+ grabGesture(Qt::PanGesture);
+ grabGesture(Qt::PinchGesture);
+ grabGesture(Qt::SwipeGesture);
+}
+
+bool ImageWidget::event(QEvent *event)
+{
+ if (event->type() == QEvent::Gesture)
+ return gestureEvent(static_cast<QGestureEvent*>(event));
+ return QWidget::event(event);
}
void ImageWidget::paintEvent(QPaintEvent*)
@@ -106,11 +98,25 @@ void ImageWidget::mouseDoubleClickEvent(QMouseEvent *)
update();
}
-void ImageWidget::panTriggered()
+bool ImageWidget::gestureEvent(QGestureEvent *event)
+{
+ if (QGesture *pan = event->gesture(Qt::PanGesture)) {
+ panTriggered(static_cast<QPanGesture*>(pan));
+ return true;
+ } else if (QGesture *pinch = event->gesture(Qt::PinchGesture)) {
+ pinchTriggered(static_cast<QPinchGesture*>(pan));
+ return true;
+ } else if (QGesture *swipe = event->gesture(Qt::SwipeGesture)) {
+ swipeTriggered(static_cast<QSwipeGesture*>(pan));
+ return true;
+ }
+ return false;
+}
+
+void ImageWidget::panTriggered(QPanGesture *gesture)
{
- QPanGesture *pg = qobject_cast<QPanGesture*>(sender());
#ifndef QT_NO_CURSOR
- switch (pg->state()) {
+ switch (gesture->state()) {
case Qt::GestureStarted:
case Qt::GestureUpdated:
setCursor(Qt::SizeAllCursor);
@@ -119,33 +125,37 @@ void ImageWidget::panTriggered()
setCursor(Qt::ArrowCursor);
}
#endif
- horizontalOffset += pg->lastOffset().width();
- verticalOffset += pg->lastOffset().height();
+ QSizeF lastOffset = gesture->property("lastOffset").toSizeF();
+ horizontalOffset += lastOffset.width();
+ verticalOffset += lastOffset.height();
update();
}
-void ImageWidget::pinchTriggered()
+void ImageWidget::pinchTriggered(QPinchGesture *gesture)
{
- QPinchGesture *pg = qobject_cast<QPinchGesture*>(sender());
- if (pg->whatChanged() & QPinchGesture::RotationAngleChanged)
- rotationAngle += pg->rotationAngle() - pg->lastRotationAngle();
- if (pg->whatChanged() & QPinchGesture::ScaleFactorChanged)
- scaleFactor += pg->scaleFactor() - pg->lastScaleFactor();
+ QPinchGesture::WhatChanged whatChanged = gesture->property("whatChanged").value<QPinchGesture::WhatChanged>();
+ if (whatChanged & QPinchGesture::RotationAngleChanged) {
+ qreal value = gesture->property("rotationAngle").toReal();
+ qreal lastValue = gesture->property("lastRotationAngle").toReal();
+ rotationAngle += value - lastValue;
+ }
+ if (whatChanged & QPinchGesture::ScaleFactorChanged) {
+ qreal value = gesture->property("scaleFactor").toReal();
+ qreal lastValue = gesture->property("lastScaleFactor").toReal();
+ scaleFactor += value - lastValue;
+ }
update();
}
-//! [swipe slot start]
-void ImageWidget::swipeTriggered()
+void ImageWidget::swipeTriggered(QSwipeGesture *gesture)
{
- QSwipeGesture *pg = qobject_cast<QSwipeGesture*>(sender());
- if (pg->horizontalDirection() == QSwipeGesture::Left
- || pg->verticalDirection() == QSwipeGesture::Up)
+ if (gesture->horizontalDirection() == QSwipeGesture::Left
+ || gesture->verticalDirection() == QSwipeGesture::Up)
goPrevImage();
else
goNextImage();
update();
}
-//! [swipe slot start]
void ImageWidget::resizeEvent(QResizeEvent*)
{
diff --git a/examples/gestures/imageviewer/imagewidget.h b/examples/gestures/imageviewer/imagewidget.h
index 2a1bfca..e05a67a 100644
--- a/examples/gestures/imageviewer/imagewidget.h
+++ b/examples/gestures/imageviewer/imagewidget.h
@@ -46,6 +46,11 @@
#include <QImage>
#include <QtGui>
+class QGestureEvent;
+class QPanGesture;
+class QPinchGesture;
+class QSwipeGesture;
+
class ImageWidget : public QWidget
{
Q_OBJECT
@@ -56,14 +61,16 @@ public:
void openDirectory(const QString &path);
protected:
+ bool event(QEvent*);
+ bool gestureEvent(QGestureEvent*);
void paintEvent(QPaintEvent*);
void resizeEvent(QResizeEvent*);
void mouseDoubleClickEvent(QMouseEvent*);
-private slots:
- void panTriggered();
- void pinchTriggered();
- void swipeTriggered();
+private:
+ void panTriggered(QPanGesture*);
+ void pinchTriggered(QPinchGesture*);
+ void swipeTriggered(QSwipeGesture*);
private:
void updateImage();
diff --git a/examples/gestures/imageviewer/tapandholdgesture.cpp b/examples/gestures/imageviewer/tapandholdgesture.cpp
deleted file mode 100644
index a10c192..0000000
--- a/examples/gestures/imageviewer/tapandholdgesture.cpp
+++ /dev/null
@@ -1,155 +0,0 @@
-/****************************************************************************
-**
-** 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 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 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 "tapandholdgesture.h"
-
-#include <QtGui/qevent.h>
-
-// #define TAPANDHOLD_USING_MOUSE
-
-/*!
- \class TapAndHoldGesture
- \since 4.6
-
- \brief The TapAndHoldGesture class represents a Tap-and-Hold gesture,
- providing additional information.
-*/
-
-const int TapAndHoldGesture::iterationCount = 40;
-const int TapAndHoldGesture::iterationTimeout = 50;
-
-/*!
- Creates a new Tap and Hold gesture handler object and marks it as a child
- of \a parent.
-
- On some platforms like Windows there is a system-wide tap and hold gesture
- that cannot be overriden, hence the gesture might never trigger and default
- context menu will be shown instead.
-*/
-TapAndHoldGesture::TapAndHoldGesture(QWidget *parent)
- : QGesture(parent), iteration(0)
-{
-}
-
-/*! \internal */
-bool TapAndHoldGesture::filterEvent(QEvent *event)
-{
- const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
- switch (event->type()) {
- case QEvent::TouchBegin: {
- if (timer.isActive())
- timer.stop();
- timer.start(TapAndHoldGesture::iterationTimeout, this);
- const QPoint p = ev->touchPoints().at(0).pos().toPoint();
- position = p;
- break;
- }
- case QEvent::TouchUpdate:
- if (ev->touchPoints().size() == 1) {
- const QPoint startPos = ev->touchPoints().at(0).startPos().toPoint();
- const QPoint pos = ev->touchPoints().at(0).pos().toPoint();
- if ((startPos - pos).manhattanLength() > 15)
- reset();
- } else {
- reset();
- }
- break;
- case QEvent::TouchEnd:
- reset();
- break;
-#ifdef TAPANDHOLD_USING_MOUSE
- case QEvent::MouseButtonPress: {
- if (timer.isActive())
- timer.stop();
- timer.start(TapAndHoldGesture::iterationTimeout, this);
- const QPoint p = static_cast<QMouseEvent*>(event)->pos();
- position = startPosition = p;
- break;
- }
- case QEvent::MouseMove: {
- const QPoint startPos = startPosition;
- const QPoint pos = static_cast<QMouseEvent*>(event)->pos();
- if ((startPos - pos).manhattanLength() > 15)
- reset();
- break;
- }
- case QEvent::MouseButtonRelease:
- reset();
- break;
-#endif // TAPANDHOLD_USING_MOUSE
- default:
- break;
- }
- return false;
-}
-
-/*! \internal */
-void TapAndHoldGesture::timerEvent(QTimerEvent *event)
-{
- if (event->timerId() != timer.timerId())
- return;
- if (iteration == TapAndHoldGesture::iterationCount) {
- timer.stop();
- updateState(Qt::GestureFinished);
- } else {
- updateState(Qt::GestureUpdated);
- }
- ++iteration;
-}
-
-/*! \internal */
-void TapAndHoldGesture::reset()
-{
- timer.stop();
- iteration = 0;
- position = startPosition = QPoint();
- updateState(Qt::NoGesture);
-}
-
-/*!
- \property TapAndHoldGesture::pos
-
- \brief The position of the gesture.
-*/
-QPoint TapAndHoldGesture::pos() const
-{
- return position;
-}
diff --git a/examples/gestures/imageviewer/tapandholdgesture.h b/examples/gestures/imageviewer/tapandholdgesture.h
deleted file mode 100644
index 682342e..0000000
--- a/examples/gestures/imageviewer/tapandholdgesture.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/****************************************************************************
-**
-** 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 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 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.
-**
-**
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef TAPANDHOLDGESTURE_H
-#define TAPANDHOLDGESTURE_H
-
-#include <QtCore/QBasicTimer>
-#include <QtGui/QGesture>
-#include <QtGui/QWidget>
-
-class TapAndHoldGesture : public QGesture
-{
- Q_OBJECT
- Q_PROPERTY(QPoint pos READ pos)
-
-public:
- TapAndHoldGesture(QWidget *parent);
-
- bool filterEvent(QEvent *event);
- void reset();
-
- QPoint pos() const;
-
-protected:
- void timerEvent(QTimerEvent *event);
-
-private:
- QBasicTimer timer;
- int iteration;
- QPoint position;
- QPoint startPosition;
- static const int iterationCount;
- static const int iterationTimeout;
-};
-
-#endif // TAPANDHOLDGESTURE_H
generated by cgit v0.12 at 2024-12-28 05:56:10 (GMT)