Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/MousePositionPanel.java @ 4182:ad2489b595d7
Fix for issue #967
author | Christian Lins <christian.lins@intevation.de> |
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date | Tue, 16 Oct 2012 12:44:15 +0200 |
parents | 0189d6b0973a |
children | 651b93c10dc5 |
rev | line source |
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1 package de.intevation.flys.client.client.ui.chart; |
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2 |
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3 import java.util.ArrayList; |
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4 |
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5 import com.google.gwt.i18n.client.NumberFormat; |
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6 |
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7 import com.smartgwt.client.widgets.Canvas; |
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8 import com.smartgwt.client.widgets.Label; |
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9 import com.smartgwt.client.widgets.layout.HLayout; |
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10 import com.smartgwt.client.widgets.events.MouseMoveEvent; |
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11 import com.smartgwt.client.widgets.events.MouseMoveHandler; |
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12 |
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13 import de.intevation.flys.client.shared.Transform2D; |
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14 |
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15 |
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16 /** |
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17 * Panel showing the mouse position in data space. |
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18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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19 */ |
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20 public class MousePositionPanel extends HLayout implements MouseMoveHandler { |
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21 |
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22 /** Is associated to a ChartTab. */ |
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23 protected ChartOutputTab chartTab; |
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24 |
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25 protected HLayout xLayout; |
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26 protected ArrayList<HLayout> yLayouts; |
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27 |
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28 |
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29 public MousePositionPanel(ChartOutputTab chartTab) { |
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30 super(); |
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31 |
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32 this.chartTab = chartTab; |
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33 |
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34 chartTab.getChartPanel().addMouseMoveHandler(this); |
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35 |
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36 initLayout(); |
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37 } |
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38 |
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39 |
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40 /** |
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41 * Initializes the layout of this component. <b>Note:</b> This layout has a |
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42 * fixed width of 195px plus a margin of 5px. |
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43 */ |
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44 protected void initLayout() { |
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45 setMembersMargin(5); |
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46 |
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47 xLayout = null; |
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48 yLayouts = new ArrayList<HLayout>(); |
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49 } |
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50 |
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51 |
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52 /** |
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53 * Listens to mouse move events to refresh the xy position. |
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54 * |
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55 * @param event The move event. |
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56 */ |
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57 public void onMouseMove(MouseMoveEvent event) { |
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58 updateMousePosition(event.getX(), event.getY()); |
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59 } |
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60 |
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61 |
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62 /** |
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63 * This method takes pixel coordinates, transforms those values into chart |
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64 * coordinates using the Transform2D class and updates the mouse position. |
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65 * |
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66 * @param x The x part of the pixel. |
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67 * @param y The y part of the pixel. |
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68 */ |
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69 public void updateMousePosition(double x, double y) { |
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70 int transformerCount = chartTab.getTransformerCount(); |
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71 |
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72 Canvas chart = chartTab.getChartPanel(); |
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73 int xOffset = chart.getPageLeft(); |
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74 int yOffset = chart.getPageTop(); |
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75 |
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76 x = x - xOffset; |
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77 y = y - yOffset; |
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78 |
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79 // Create Layout for x coordinates. |
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80 if (xLayout == null){ |
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81 Label xDesc = new Label("Position: X = "); |
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82 Label xLabel = new Label(); |
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83 xLayout = new HLayout(); |
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84 xLayout.setWidth(125); |
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85 xLayout.addMember(xDesc); |
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86 xLayout.addMember(xLabel); |
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87 xDesc.setWidth(70); |
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88 xLabel.setWidth(55); |
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89 addMember(xLayout); |
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90 } |
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91 |
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92 ArrayList<String> yCoordinates = new ArrayList<String>(); |
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93 String xCoordinate = ""; |
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94 for (int i = 0; i < transformerCount; i++) { |
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95 HLayout yLayout = null; |
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96 // If no layout exists for this y axis, create one. |
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97 // else use the existing one. |
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98 if (yLayouts.size() <= i) { |
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99 Label yDesc = new Label("Y" + (i+1) + " = "); |
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100 Label yLabel = new Label(); |
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101 yLayout = new HLayout(); |
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102 yLayout.setWidth(80); |
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103 yLayout.addMember(yDesc); |
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104 yLayout.addMember(yLabel); |
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105 yDesc.setWidth(30); |
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106 yLabel.setWidth(50); |
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107 addMember(yLayout); |
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108 yLayouts.add(i, yLayout); |
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109 } |
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110 else { |
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111 yLayout = yLayouts.get(i); |
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112 } |
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113 |
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114 Transform2D transformer = chartTab.getTransformer(i); |
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115 |
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116 if (transformer == null) { |
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117 return; |
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118 } |
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119 |
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120 // Get the label for the coordinates. |
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121 Canvas xLabel = xLayout.getMember(1); |
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122 Canvas yLabel = yLayout.getMember(1); |
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123 |
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124 double[] xy = transformer.transform(x, y); |
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125 String[] xyStr = transformer.format(new Number[] { |
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126 new Double(xy[0]), new Double(xy[1]) }); |
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127 // Set the coordinates. |
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128 xLabel.setContents(xyStr[0]); |
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129 yLabel.setContents(xyStr[1]); |
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130 } |
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131 |
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132 // Remove y coordinates. |
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133 if (yLayouts.size() > transformerCount) { |
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134 for (int i = yLayouts.size() - 1; i >= transformerCount; i--) { |
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135 removeMember(yLayouts.get(i)); |
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136 yLayouts.remove(i); |
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137 } |
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138 } |
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139 } |
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140 } |
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141 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |