chart.cpp
61 lines
| 1.9 KiB
| text/x-c
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CppLexer
Jani Honkonen
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r1187 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
|
Jani Honkonen
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r1187 | ** All rights reserved. | ||
|
Titta Heikkala
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
|
Jani Honkonen
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r1187 | ** | ||
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Titta Heikkala
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r2740 | ** This file is part of the Qt Charts module. | ||
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Jani Honkonen
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r1187 | ** | ||
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Titta Heikkala
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
|
Titta Heikkala
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r2776 | ** agreement between you and The Qt Company. | ||
|
Jani Honkonen
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r1187 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
|
Titta Heikkala
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r2740 | ** contact form at http://qt.io | ||
|
Jani Honkonen
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r1187 | ** | ||
| ****************************************************************************/ | ||||
| #include "chart.h" | ||||
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Titta Heikkala
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r2714 | #include <QtWidgets/QGesture> | ||
| #include <QtWidgets/QGraphicsScene> | ||||
| #include <QtWidgets/QGraphicsView> | ||||
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Jani Honkonen
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r1187 | |||
| Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags) | ||||
Miikka Heikkinen
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r2483 | : QChart(QChart::ChartTypeCartesian, parent, wFlags) | ||
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Jani Honkonen
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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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Jani Honkonen
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r1388 | //![1] | ||
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Jani Honkonen
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r1187 | bool Chart::sceneEvent(QEvent *event) | ||
| { | ||||
| if (event->type() == QEvent::Gesture) | ||||
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Jani Honkonen
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r2102 | return gestureEvent(static_cast<QGestureEvent *>(event)); | ||
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Jani Honkonen
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r1187 | return QChart::event(event); | ||
| } | ||||
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Jani Honkonen
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r2102 | bool Chart::gestureEvent(QGestureEvent *event) | ||
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Jani Honkonen
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r1187 | { | ||
| if (QGesture *gesture = event->gesture(Qt::PanGesture)) { | ||||
| QPanGesture *pan = static_cast<QPanGesture *>(gesture); | ||||
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Miikka Heikkinen
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r2579 | QChart::scroll(-(pan->delta().x()), pan->delta().y()); | ||
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Jani Honkonen
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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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Jani Honkonen
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r1388 | QChart::zoom(pinch->scaleFactor()); | ||
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Jani Honkonen
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r1187 | } | ||
| return true; | ||||
| } | ||||
|
Jani Honkonen
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r1388 | //![1] | ||