author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 06 Jul 2010 14:36:53 +0300 | |
changeset 7 | 923ff622b8b9 |
parent 1 | f7ac710697a9 |
child 28 | b7da29130b0e |
child 34 | ed14f46c0e55 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (developer.feedback@nokia.com) |
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** |
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** This file is part of the HbCore module of the UI Extensions for Mobile. |
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** |
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** GNU Lesser General Public License Usage |
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** This file may be used under the terms of the GNU Lesser General Public |
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** License version 2.1 as published by the Free Software Foundation and |
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** appearing in the file LICENSE.LGPL included in the packaging of this file. |
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** Please review the following information to ensure the GNU Lesser General |
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** Public License version 2.1 requirements will be met: |
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at developer.feedback@nokia.com. |
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** |
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****************************************************************************/ |
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#include <QEvent> |
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#include <QGestureRecognizer> |
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#include <QGraphicsView> |
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#include <QMouseEvent> |
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#include <QDebug> |
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#include "hbpinchgesture.h" |
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#include "hbpinchgesture_p.h" |
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#include "hbpinchgesturelogic_p.h" |
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/*! |
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@hbcore |
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\internal |
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\class HbPinchGestureLogic |
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\brief |
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*/ |
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/*! |
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\internal |
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\brief |
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\return |
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*/ |
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HbPinchGestureLogic::HbPinchGestureLogic() |
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{ |
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} |
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HbPinchGestureLogic::~HbPinchGestureLogic() {} |
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/*! |
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\internal |
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\brief |
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\return |
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*/ |
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void HbPinchGestureLogic::resetGesture(HbPinchGesture *gesture) |
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{ |
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HbPinchGesturePrivate *d = gesture->d_func(); |
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gesture->setTotalChangeFlags(0); |
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gesture->setChangeFlags(0); |
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gesture->setStartCenterPoint(QPointF()); |
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gesture->setLastCenterPoint(QPointF()); |
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gesture->setCenterPoint(QPointF()); |
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d->mSceneStartCenterPoint = QPointF(); |
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d->mSceneLastCenterPoint = QPointF(); |
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d->mSceneCenterPoint = QPointF(); |
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gesture->setTotalScaleFactor(1); |
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gesture->setLastScaleFactor(1); |
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gesture->setScaleFactor(1); |
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gesture->setTotalRotationAngle(0); |
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gesture->setLastRotationAngle(0); |
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gesture->setRotationAngle(0); |
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d->mSceneTotalRotationAngle = 0; |
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d->mSceneLastRotationAngle = 0; |
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d->mSceneRotationAngle = 0; |
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d->mIsNewSequence = true; |
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} |
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/*! |
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\internal |
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\brief |
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\return |
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*/ |
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QPointF HbPinchGestureLogic::mapToScene( QObject* watched, const QPointF &pos ) |
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{ |
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QGraphicsView* view = qobject_cast<QGraphicsView*>(watched->parent()); |
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if ( view ) |
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{ |
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return view->mapToScene(view->mapFromGlobal(pos.toPoint())); |
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} |
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108 |
|
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return QPointF(); |
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} |
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111 |
|
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112 |
/*! |
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\internal |
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\brief |
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\return |
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116 |
|
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*/ |
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QGestureRecognizer::Result HbPinchGestureLogic::recognize(Qt::GestureState gestureState, |
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HbPinchGesture *gesture, |
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QObject *watched, |
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QEvent *event) |
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{ |
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HbPinchGesturePrivate *d = gesture->d_func(); |
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124 |
|
7
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if (!watched->isWidgetType()) { |
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return QGestureRecognizer::Ignore; |
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} |
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128 |
|
1
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const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); |
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130 |
|
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QGestureRecognizer::Result result; |
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132 |
|
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switch (event->type()) { |
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case QEvent::TouchBegin: { |
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result = QGestureRecognizer::MayBeGesture; |
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break; |
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} |
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case QEvent::TouchEnd: { |
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if (gestureState != Qt::NoGesture) { |
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result = QGestureRecognizer::FinishGesture; |
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} else { |
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result = QGestureRecognizer::CancelGesture; |
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} |
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break; |
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145 |
} |
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146 |
case QEvent::TouchUpdate: { |
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gesture->setChangeFlags(0); |
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if (ev->touchPoints().size() == 2) { |
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QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); |
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QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); |
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151 |
|
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gesture->setHotSpot(p1.screenPos()); |
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153 |
|
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QLineF line(p1.screenPos(), p2.screenPos()); |
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QLineF tmp(line); |
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tmp.setLength(line.length() / 2.); |
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QPointF centerPoint = tmp.p2(); |
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158 |
|
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if (d->mIsNewSequence) { |
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gesture->setStartCenterPoint(centerPoint); |
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d->mSceneStartCenterPoint = mapToScene(watched, centerPoint); |
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} |
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gesture->setLastCenterPoint(gesture->centerPoint()); |
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d->mSceneLastCenterPoint = mapToScene(watched, gesture->centerPoint()); |
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gesture->setCenterPoint(centerPoint); |
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d->mSceneCenterPoint = mapToScene(watched, centerPoint); |
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gesture->setChangeFlags(gesture->changeFlags() |= QPinchGesture::CenterPointChanged); |
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168 |
|
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const qreal scaleFactor = |
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QLineF(p1.screenPos(), p2.screenPos()).length() |
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/ QLineF(p1.startScreenPos(), p2.startScreenPos()).length(); |
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if (d->mIsNewSequence) { |
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gesture->setLastScaleFactor(scaleFactor); |
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} else { |
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gesture->setLastScaleFactor(gesture->scaleFactor()); |
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176 |
} |
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gesture->setScaleFactor(scaleFactor); |
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gesture->setTotalScaleFactor(gesture->totalScaleFactor() + gesture->scaleFactor() - gesture->lastScaleFactor()); |
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gesture->setChangeFlags(gesture->changeFlags() |= QPinchGesture::ScaleFactorChanged); |
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180 |
|
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qreal angle = QLineF(p1.screenPos(), p2.screenPos()).angle(); |
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182 |
if (angle > 180) { |
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angle -= 360; |
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184 |
} |
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qreal sceneAngle = QLineF(p1.scenePos(), p2.scenePos()).angle(); |
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if (sceneAngle > 180) { |
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sceneAngle -= 360; |
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188 |
} |
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189 |
qreal startAngle = QLineF(p1.startScreenPos(), p2.startScreenPos()).angle(); |
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190 |
if (startAngle > 180) { |
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startAngle -= 360; |
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192 |
} |
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193 |
qreal sceneStartAngle = QLineF(p1.startScenePos(), p2.startScenePos()).angle(); |
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194 |
if (sceneStartAngle > 180) { |
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sceneStartAngle -= 360; |
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196 |
} |
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197 |
const qreal rotationAngle = startAngle - angle; |
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const qreal sceneRotationAngle = sceneStartAngle - sceneAngle; |
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199 |
if (d->mIsNewSequence) { |
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200 |
gesture->setLastRotationAngle(rotationAngle); |
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201 |
d->mSceneLastRotationAngle = sceneRotationAngle; |
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202 |
} |
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203 |
else { |
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204 |
gesture->setLastRotationAngle(gesture->rotationAngle()); |
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d->mSceneLastRotationAngle = d->mSceneRotationAngle; |
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206 |
} |
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207 |
gesture->setRotationAngle(rotationAngle); |
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208 |
d->mSceneRotationAngle = sceneRotationAngle; |
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209 |
gesture->setTotalRotationAngle(gesture->totalRotationAngle() + gesture->rotationAngle() - gesture->lastRotationAngle()); |
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d->mSceneTotalRotationAngle = d->mSceneTotalRotationAngle + d->mSceneRotationAngle - d->mSceneLastRotationAngle; |
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gesture->setChangeFlags(gesture->changeFlags() |= QPinchGesture::RotationAngleChanged); |
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gesture->setTotalChangeFlags(gesture->totalChangeFlags() |= gesture->changeFlags()); |
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d->mIsNewSequence = false; |
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result = QGestureRecognizer::TriggerGesture; |
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215 |
} else { |
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d->mIsNewSequence = true; |
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if (gestureState == Qt::NoGesture) |
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result = QGestureRecognizer::Ignore; |
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219 |
else |
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result = QGestureRecognizer::FinishGesture; |
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221 |
} |
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222 |
break; |
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223 |
} |
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224 |
case QEvent::MouseButtonPress: |
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case QEvent::MouseMove: |
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case QEvent::MouseButtonRelease: |
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result = QGestureRecognizer::Ignore; |
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228 |
break; |
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default: |
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result = QGestureRecognizer::Ignore; |
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231 |
break; |
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232 |
} |
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233 |
return result; |
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234 |
} |