chart.cpp
63 lines
| 1.9 KiB
| text/x-c
|
CppLexer
Michal Klocek
|
r1722 | /**************************************************************************** | ||
| ** | ||||
| ** Copyright (C) 2012 Digia Plc | ||||
| ** 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) | ||||
| :QChart(parent, wFlags) | ||||
| { | ||||
| // 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() | ||||
| { | ||||
| } | ||||
| //![1] | ||||
| bool Chart::sceneEvent(QEvent *event) | ||||
| { | ||||
| if (event->type() == QEvent::Gesture) | ||||
| return gestureEvent(static_cast<QGestureEvent*>(event)); | ||||
| return QChart::event(event); | ||||
| } | ||||
| bool Chart::gestureEvent(QGestureEvent* event) | ||||
| { | ||||
| if (QGesture *gesture = event->gesture(Qt::PanGesture)) { | ||||
| QPanGesture *pan = static_cast<QPanGesture *>(gesture); | ||||
| QChart::scroll(pan->delta().x(),pan->delta().y()); | ||||
| } | ||||
| if (QGesture *gesture = event->gesture(Qt::PinchGesture)) { | ||||
| QPinchGesture *pinch = static_cast<QPinchGesture *>(gesture); | ||||
| if (pinch->changeFlags() & QPinchGesture::ScaleFactorChanged) | ||||
| QChart::zoom(pinch->scaleFactor()); | ||||
| } | ||||
| return true; | ||||
| } | ||||
| //![1] | ||||