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1 | 1 | /**************************************************************************** |
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2 | 2 | ** |
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3 | 3 | ** Copyright (C) 2013 Digia Plc |
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4 | 4 | ** All rights reserved. |
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5 | 5 | ** For any questions to Digia, please use contact form at http://qt.digia.com |
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6 | 6 | ** |
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7 | 7 | ** This file is part of the Qt Enterprise Charts Add-on. |
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8 | 8 | ** |
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9 | 9 | ** $QT_BEGIN_LICENSE$ |
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10 | 10 | ** Licensees holding valid Qt Enterprise licenses may use this file in |
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11 | 11 | ** accordance with the Qt Enterprise License Agreement provided with the |
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12 | 12 | ** Software or, alternatively, in accordance with the terms contained in |
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13 | 13 | ** a written agreement between you and Digia. |
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14 | 14 | ** |
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15 | 15 | ** If you have questions regarding the use of this file, please use |
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16 | 16 | ** contact form at http://qt.digia.com |
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17 | 17 | ** $QT_END_LICENSE$ |
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18 | 18 | ** |
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19 | 19 | ****************************************************************************/ |
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20 | 20 | |
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21 | 21 | #include "chart.h" |
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22 | 22 | #include <QGesture> |
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23 | 23 | #include <QGraphicsScene> |
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24 | 24 | #include <QGraphicsView> |
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25 | 25 | |
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26 | 26 | Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags) |
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27 | 27 | : QChart(QChart::ChartTypeCartesian, parent, wFlags) |
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28 | 28 | { |
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29 | 29 | // Seems that QGraphicsView (QChartView) does not grab gestures. |
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30 | 30 | // They can only be grabbed here in the QGraphicsWidget (QChart). |
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31 | 31 | grabGesture(Qt::PanGesture); |
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32 | 32 | grabGesture(Qt::PinchGesture); |
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33 | 33 | } |
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34 | 34 | |
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35 | 35 | Chart::~Chart() |
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36 | 36 | { |
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37 | 37 | |
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38 | 38 | } |
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39 | 39 | |
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40 | 40 | //![1] |
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41 | 41 | bool Chart::sceneEvent(QEvent *event) |
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42 | 42 | { |
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43 | 43 | if (event->type() == QEvent::Gesture) |
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44 | 44 | return gestureEvent(static_cast<QGestureEvent *>(event)); |
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45 | 45 | return QChart::event(event); |
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46 | 46 | } |
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47 | 47 | |
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48 | 48 | bool Chart::gestureEvent(QGestureEvent *event) |
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49 | 49 | { |
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50 | 50 | if (QGesture *gesture = event->gesture(Qt::PanGesture)) { |
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51 | 51 | QPanGesture *pan = static_cast<QPanGesture *>(gesture); |
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52 | QChart::scroll(pan->delta().x(), pan->delta().y()); | |
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52 | QChart::scroll(-(pan->delta().x()), pan->delta().y()); | |
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53 | 53 | } |
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54 | 54 | |
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55 | 55 | if (QGesture *gesture = event->gesture(Qt::PinchGesture)) { |
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56 | 56 | QPinchGesture *pinch = static_cast<QPinchGesture *>(gesture); |
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57 | 57 | if (pinch->changeFlags() & QPinchGesture::ScaleFactorChanged) |
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58 | 58 | QChart::zoom(pinch->scaleFactor()); |
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59 | 59 | } |
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60 | 60 | |
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61 | 61 | return true; |
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62 | 62 | } |
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63 | 63 | //![1] |
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