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1 | 1 | #include "chartwidget.h" |
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2 | 2 | #include <QMouseEvent> |
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3 | 3 | |
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4 | 4 | ChartWidget::ChartWidget(QWidget *parent) |
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5 | 5 | : QChartView(parent), |
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6 | 6 | m_rubberBand(QRubberBand::Rectangle,this) |
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7 | 7 | { |
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8 | 8 | } |
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9 | 9 | |
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10 | 10 | void ChartWidget::mousePressEvent(QMouseEvent *event) |
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11 | 11 | { |
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12 | 12 | if(event->button()!=Qt::LeftButton) return; |
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13 | 13 | |
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14 | 14 | int margin = this->margin(); |
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15 | 15 | |
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16 | 16 | QRect rect(margin,margin,width()-2*margin,height()-2*margin); |
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17 | 17 | |
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18 | 18 | m_origin = event->pos(); |
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19 | 19 | |
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20 | 20 | if (!rect.contains(m_origin)) return; |
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21 | 21 | |
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22 | 22 | m_rubberBand.setGeometry(QRect(m_origin, QSize())); |
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23 | 23 | m_rubberBand.show(); |
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24 | 24 | |
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25 | 25 | event->accept(); |
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26 | 26 | } |
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27 | 27 | |
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28 | 28 | void ChartWidget::mouseMoveEvent(QMouseEvent *event) |
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29 | 29 | { |
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30 | 30 | if(m_rubberBand.isVisible()) |
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31 | 31 | m_rubberBand.setGeometry(QRect(m_origin, event->pos()).normalized()); |
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32 | 32 | } |
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33 | 33 | |
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34 | 34 | void ChartWidget::mouseReleaseEvent(QMouseEvent *event) |
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35 | 35 | { |
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36 | 36 | if( event->button()==Qt::LeftButton && m_rubberBand.isVisible()) { |
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37 | 37 | m_rubberBand.hide(); |
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38 | 38 | |
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39 | 39 | QRect rect = m_rubberBand.geometry(); |
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40 |
zoomIn |
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40 | zoomIn(rect); | |
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41 | 41 | event->accept(); |
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42 | 42 | } |
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43 | 43 | |
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44 | 44 | if(event->button()==Qt::RightButton) { |
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45 | 45 | zoomOut(); |
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46 | 46 | } |
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47 | 47 | } |
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48 | 48 | |
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49 | 49 | |
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50 | 50 | void ChartWidget::keyPressEvent(QKeyEvent *event) |
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51 | 51 | { |
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52 | 52 | switch (event->key()) { |
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53 | 53 | case Qt::Key_Plus: |
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54 | 54 | zoomIn(); |
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55 | 55 | break; |
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56 | 56 | case Qt::Key_Minus: |
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57 | 57 | zoomOut(); |
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58 | 58 | break; |
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59 | 59 | default: |
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60 | 60 | QGraphicsView::keyPressEvent(event); |
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61 | 61 | break; |
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62 | 62 | } |
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63 | 63 | } |
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