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Diffstat (limited to 'doc/src/snippets/gestures/imageviewer/tapandholdgesture.cpp')
-rw-r--r-- | doc/src/snippets/gestures/imageviewer/tapandholdgesture.cpp | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/doc/src/snippets/gestures/imageviewer/tapandholdgesture.cpp b/doc/src/snippets/gestures/imageviewer/tapandholdgesture.cpp deleted file mode 100644 index 7dd2359..0000000 --- a/doc/src/snippets/gestures/imageviewer/tapandholdgesture.cpp +++ /dev/null @@ -1,159 +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) -{ - 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; -} |