Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/MousePositionPanel.java @ 538:75df57220104
Adapted the MousePositionPanel to use the Transform2D object for computing the chart coordinates from image coordinates.
flys-client/trunk@2036 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Wed, 01 Jun 2011 09:03:18 +0000 |
parents | e08777967bad |
children | fea93eebd2fa |
rev | line source |
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534
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1 package de.intevation.flys.client.client.ui.chart; |
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2 |
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3 import com.google.gwt.i18n.client.NumberFormat; |
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4 |
534
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5 import com.smartgwt.client.types.Alignment; |
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6 import com.smartgwt.client.widgets.Canvas; |
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7 import com.smartgwt.client.widgets.Label; |
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8 import com.smartgwt.client.widgets.layout.HLayout; |
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9 import com.smartgwt.client.widgets.events.MouseMoveEvent; |
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10 import com.smartgwt.client.widgets.events.MouseMoveHandler; |
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11 |
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12 import de.intevation.flys.client.shared.Transform2D; |
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13 |
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14 |
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15 /** |
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16 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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17 */ |
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18 public class MousePositionPanel extends HLayout implements MouseMoveHandler { |
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19 |
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20 protected ChartOutputTab chartTab; |
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21 |
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22 protected NumberFormat nf; |
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23 |
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24 protected Label x; |
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25 protected Label y; |
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26 |
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27 |
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28 public MousePositionPanel(ChartOutputTab chartTab) { |
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29 super(); |
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30 |
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31 this.chartTab = chartTab; |
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32 |
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33 x = new Label(); |
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34 y = new Label(); |
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35 |
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36 nf = NumberFormat.getDecimalFormat(); |
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37 |
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38 chartTab.getChartPanel().addMouseMoveHandler(this); |
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39 |
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40 initLayout(); |
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41 } |
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42 |
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43 |
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44 /** |
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45 * Initializes the layout of this component. |
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46 */ |
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47 protected void initLayout() { |
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48 setLayoutAlign(Alignment.RIGHT); |
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49 setMembersMargin(5); |
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50 |
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51 Label xDesc = new Label("Position: X = "); |
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52 Label yDesc = new Label("Y = "); |
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53 |
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54 xDesc.setWidth(60); |
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55 x.setWidth(25); |
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56 yDesc.setWidth(20); |
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57 y.setWidth(25); |
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58 |
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59 addMember(xDesc); |
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60 addMember(x); |
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61 addMember(yDesc); |
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62 addMember(y); |
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63 } |
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64 |
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65 |
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66 /** |
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67 * /Updates the X value displayed in the <i>x</i> label. |
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68 * |
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69 * @param x the new x value. |
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70 */ |
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71 public void setX(double x) { |
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72 this.x.setContents(nf.format(x)); |
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73 } |
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74 |
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75 |
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76 /** |
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77 * /Updates the Y value displayed in the <i>y</i> label. |
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78 * |
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79 * @param y the new y value. |
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80 */ |
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81 public void setY(double y) { |
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82 this.y.setContents(nf.format(y)); |
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83 } |
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84 |
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85 |
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86 /** |
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87 * Listens to mouse move events to refresh the xy position. |
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88 * |
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89 * @param event The move event. |
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90 */ |
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91 public void onMouseMove(MouseMoveEvent event) { |
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92 updateMousePosition(event.getX(), event.getY()); |
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93 } |
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94 |
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95 |
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96 /** |
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97 * This method takes pixel coordinates, transforms those values into chart |
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98 * coordinates using the Transform2D class and updates the mouse position. |
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99 * |
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100 * @param x The x part of the pixel. |
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101 * @param y The y part of the pixel. |
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102 */ |
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103 public void updateMousePosition(double x, double y) { |
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104 Transform2D transformer = chartTab.getTransformer(); |
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105 |
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106 if (transformer == null) { |
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107 return; |
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108 } |
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109 |
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110 Canvas chart = chartTab.getChartPanel(); |
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111 int xOffset = chart.getPageLeft(); |
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112 int yOffset = chart.getPageTop(); |
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113 |
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114 x = x - xOffset; |
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115 y = y - yOffset; |
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116 |
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117 double[] xy = transformer.transform(x,y); |
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118 |
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119 setX(xy[0]); |
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120 setY(xy[1]); |
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121 } |
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122 } |
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123 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |