chart.cpp
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| text/x-c
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CppLexer
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r1187 | /**************************************************************************** | ||
** | ||||
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r2433 | ** Copyright (C) 2013 Digia Plc | ||
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r1187 | ** All rights reserved. | ||
** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
** | ||||
** This file is part of the Qt Commercial Charts Add-on. | ||||
** | ||||
** $QT_BEGIN_LICENSE$ | ||||
** Licensees holding valid Qt Commercial licenses may use this file in | ||||
** accordance with the Qt Commercial License Agreement provided with the | ||||
** Software or, alternatively, in accordance with the terms contained in | ||||
** a written agreement between you and Digia. | ||||
** | ||||
** If you have questions regarding the use of this file, please use | ||||
** contact form at http://qt.digia.com | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
#include "chart.h" | ||||
#include <QGesture> | ||||
#include <QGraphicsScene> | ||||
#include <QGraphicsView> | ||||
Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags) | ||||
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r2483 | : QChart(QChart::ChartTypeCartesian, parent, wFlags) | ||
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r1187 | { | ||
// Seems that QGraphicsView (QChartView) does not grab gestures. | ||||
// They can only be grabbed here in the QGraphicsWidget (QChart). | ||||
grabGesture(Qt::PanGesture); | ||||
grabGesture(Qt::PinchGesture); | ||||
} | ||||
Chart::~Chart() | ||||
{ | ||||
} | ||||
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r1388 | //![1] | ||
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r1187 | bool Chart::sceneEvent(QEvent *event) | ||
{ | ||||
if (event->type() == QEvent::Gesture) | ||||
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r2102 | return gestureEvent(static_cast<QGestureEvent *>(event)); | ||
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r1187 | return QChart::event(event); | ||
} | ||||
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r2102 | bool Chart::gestureEvent(QGestureEvent *event) | ||
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r1187 | { | ||
if (QGesture *gesture = event->gesture(Qt::PanGesture)) { | ||||
QPanGesture *pan = static_cast<QPanGesture *>(gesture); | ||||
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r2098 | QChart::scroll(pan->delta().x(), pan->delta().y()); | ||
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r1187 | } | ||
if (QGesture *gesture = event->gesture(Qt::PinchGesture)) { | ||||
QPinchGesture *pinch = static_cast<QPinchGesture *>(gesture); | ||||
if (pinch->changeFlags() & QPinchGesture::ScaleFactorChanged) | ||||
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r1388 | QChart::zoom(pinch->scaleFactor()); | ||
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r1187 | } | ||
return true; | ||||
} | ||||
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r1388 | //![1] | ||