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-/****************************************************************************
-**
-** 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)
-{
- if (!event->spontaneous())
- return false;
- 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 */
-//! [tapandhold-reset]
-void TapAndHoldGesture::reset()
-{
- timer.stop();
- iteration = 0;
- position = startPosition = QPoint();
- updateState(Qt::NoGesture);
-}
-//! [tapandhold-reset]
-
-/*!
- \property TapAndHoldGesture::pos
-
- \brief The position of the gesture.
-*/
-QPoint TapAndHoldGesture::pos() const
-{
- return position;
-}