Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/MousePositionPanel.java @ 2477:936e3e6cd9b9

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Issue 502. Create label to show coordinates for each y axis in the chart. flys-client/trunk@4220 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Thu, 12 Apr 2012 09:49:41 +0000
parents ef745bc6bed9
children 8d27d2d33d70
rev   line source
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 java.util.ArrayList;
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4
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5 import com.google.gwt.core.client.GWT;
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6
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7 import com.google.gwt.i18n.client.NumberFormat;
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8
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9 import com.smartgwt.client.widgets.Canvas;
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10 import com.smartgwt.client.widgets.Label;
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11 import com.smartgwt.client.widgets.layout.HLayout;
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12 import com.smartgwt.client.widgets.events.MouseMoveEvent;
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13 import com.smartgwt.client.widgets.events.MouseMoveHandler;
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14
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15 import de.intevation.flys.client.shared.Transform2D;
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16
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17
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18 /**
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19 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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20 */
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21 public class MousePositionPanel extends HLayout implements MouseMoveHandler {
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22
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23 protected ChartOutputTab chartTab;
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24
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25 protected NumberFormat nf;
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26
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27 protected HLayout xLayout;
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28 protected ArrayList<HLayout> yLayouts;
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29
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30 public MousePositionPanel(ChartOutputTab chartTab) {
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31 super();
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32
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33 this.chartTab = chartTab;
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34
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35 nf = NumberFormat.getDecimalFormat();
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36
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37 chartTab.getChartPanel().addMouseMoveHandler(this);
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38
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39 initLayout();
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40 }
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41
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42
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43 /**
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44 * Initializes the layout of this component. <b>Note:</b> This layout has a
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45 * fixed width of 195px plus a margin of 5px.
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46 */
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47 protected void initLayout() {
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48 setMembersMargin(5);
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49
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50 xLayout = null;
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51 yLayouts = new ArrayList<HLayout>();
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52 }
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53
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54
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55 /**
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56 * Listens to mouse move events to refresh the xy position.
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57 *
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58 * @param event The move event.
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59 */
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60 public void onMouseMove(MouseMoveEvent event) {
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61 updateMousePosition(event.getX(), event.getY());
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62 }
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63
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64
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65 /**
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66 * This method takes pixel coordinates, transforms those values into chart
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67 * coordinates using the Transform2D class and updates the mouse position.
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68 *
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69 * @param x The x part of the pixel.
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70 * @param y The y part of the pixel.
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71 */
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72 public void updateMousePosition(double x, double y) {
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73 int transformerCount = chartTab.getTransformerCount();
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74
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75 Canvas chart = chartTab.getChartPanel();
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76 int xOffset = chart.getPageLeft();
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77 int yOffset = chart.getPageTop();
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78
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79 x = x - xOffset;
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80 y = y - yOffset;
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81
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82 // Create Layout for x coordinates.
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83 if (xLayout == null){
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84 Label xDesc = new Label("Position: X = ");
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85 Label xLabel = new Label();
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86 xLayout = new HLayout();
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87 xLayout.setWidth(125);
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88 xLayout.addMember(xDesc);
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89 xLayout.addMember(xLabel);
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90 xDesc.setWidth(70);
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91 xLabel.setWidth(55);
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92 addMember(xLayout);
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93 }
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94
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95 ArrayList<String> yCoordinates = new ArrayList<String>();
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96 String xCoordinate = "";
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97 for (int i = 0; i < transformerCount; i++) {
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98 HLayout yLayout = null;
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99 // If no layout exists for this y axis, create one.
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100 // else use the existing one.
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101 if (yLayouts.size() <= i) {
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102 Label yDesc = new Label("Y" + (i+1) + " = ");
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103 Label yLabel = new Label();
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104 yLayout = new HLayout();
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105 yLayout.setWidth(80);
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106 yLayout.addMember(yDesc);
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107 yLayout.addMember(yLabel);
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108 yDesc.setWidth(30);
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109 yLabel.setWidth(50);
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110 addMember(yLayout);
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111 yLayouts.add(i, yLayout);
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112 }
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113 else {
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114 yLayout = yLayouts.get(i);
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115 }
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116
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117 Transform2D transformer = chartTab.getTransformer(i);
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118
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119 if (transformer == null) {
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120 return;
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121 }
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122
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123 // Get the label for the coordinates.
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124 Canvas xLabel = xLayout.getMember(1);
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125 Canvas yLabel = yLayout.getMember(1);
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Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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126
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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127 double[] xy = transformer.transform(x,y);
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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128 String[] xyStr = transformer.format(new Number[] {
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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129 new Double(xy[0]), new Double(xy[1]) });
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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130 // Set the coordinates.
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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131 xLabel.setContents(xyStr[0]);
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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132 yLabel.setContents(xyStr[1]);
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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133 }
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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134
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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135 // Remove y coordinates.
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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136 if (yLayouts.size() > transformerCount) {
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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137 for (int i = yLayouts.size() - 1; i >= transformerCount; i--) {
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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138 removeMember(yLayouts.get(i));
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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139 yLayouts.remove(i);
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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140 }
936e3e6cd9b9 Issue 502.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1598
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141 }
534
e08777967bad Added a first implementation of a MousePositionPanel - work is not finished yet.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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142 }
e08777967bad Added a first implementation of a MousePositionPanel - work is not finished yet.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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143 }
e08777967bad Added a first implementation of a MousePositionPanel - work is not finished yet.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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144 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org