Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/ChartOutputTab.java @ 542:7c57149e8715

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Append the x and y ranges determined after zooming with the ZoomboxControl to the attribute document used for the chart creation. flys-client/trunk@2045 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 03 Jun 2011 06:34:32 +0000
parents ed29599e06e5
children 9c2cf4811a7d
rev   line source
521
fc60822e9c89 Added a new package 'chart' that should be the place where chart relevant classes should be stored. Moved ChartOutputTab into that package.
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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.Date;
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4
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5 import com.google.gwt.core.client.GWT;
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6 import com.google.gwt.user.client.rpc.AsyncCallback;
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8 import com.smartgwt.client.widgets.Canvas;
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9 import com.smartgwt.client.widgets.Img;
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11 import com.smartgwt.client.widgets.layout.HLayout;
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12 import com.smartgwt.client.widgets.layout.VLayout;
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13
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14 import com.smartgwt.client.widgets.events.ResizedEvent;
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15 import com.smartgwt.client.widgets.events.ResizedHandler;
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16
538
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17 import de.intevation.flys.client.shared.Transform2D;
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18 import de.intevation.flys.client.shared.model.Collection;
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19 import de.intevation.flys.client.shared.model.OutputMode;
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20 import de.intevation.flys.client.client.Config;
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c17c593f8732 The chart in the ChartOutputTab is refreshed when there occur any changes in the chart theme panel.
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21 import de.intevation.flys.client.client.event.OutputParameterChangeEvent;
c17c593f8732 The chart in the ChartOutputTab is refreshed when there occur any changes in the chart theme panel.
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22 import de.intevation.flys.client.client.event.OutputParameterChangeHandler;
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23 import de.intevation.flys.client.client.event.ZoomEvent;
ed29599e06e5 Added the ChartOutputTab as ZoomHandler for the ZoomboxControl - no zooming is done yet.
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24 import de.intevation.flys.client.client.event.ZoomHandler;
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25 import de.intevation.flys.client.client.services.ChartInfoService;
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26 import de.intevation.flys.client.client.services.ChartInfoServiceAsync;
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27 import de.intevation.flys.client.client.ui.CollectionView;
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28 import de.intevation.flys.client.client.ui.OutputTab;
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29
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30
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31 /**
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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33 */
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34 public class ChartOutputTab
c17c593f8732 The chart in the ChartOutputTab is refreshed when there occur any changes in the chart theme panel.
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35 extends OutputTab
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36 implements ResizedHandler, OutputParameterChangeHandler, ZoomHandler
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37 {
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38 public static final int DEFAULT_CHART_WIDTH = 600;
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39 public static final int DEFAULT_CHART_HEIGHT = 500;
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40
527
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41 public static final int THEMEPANEL_MIN_WIDTH = 200;
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42
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43
538
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44 /** The service that is used to fetch chart information.*/
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45 protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class);
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46
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47 /** The transformer used to transform image pixels into chart coordinates.*/
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48 protected Transform2D transformer;
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49
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50 /** The collection view.*/
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51 protected CollectionView view;
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52
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53
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54 /** The canvas that wraps the chart toolbar.*/
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55 protected Canvas tbarPanel;
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56
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57 /** The canvas that wraps the theme editor.*/
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58 protected Canvas left;
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59
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60 /** The canvas that wraps the chart.*/
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61 protected Canvas right;
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62
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63
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64 /** Chart zoom options.*/
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65 protected double[] xrange;
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66 protected double[] yrange;
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67
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68
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69 /**
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70 * The default constructor to create a new ChartOutputTab.
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71 *
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72 * @param title The title of this tab.
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73 * @param collection The Collection which this chart belongs to.
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74 * @param mode The OutputMode.
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75 */
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76 public ChartOutputTab(
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77 String title,
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78 Collection collection,
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79 OutputMode mode,
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80 CollectionView collectionView
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81 ){
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82 super(title, collection, mode);
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83
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84 view = collectionView;
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85 left = new Canvas();
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86 right = new Canvas();
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87 tbarPanel = new ChartToolbar(collectionView, this);
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88 xrange = new double[2];
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89 yrange = new double[2];
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90
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91 left.setBorder("1px solid black");
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92 left.setWidth(THEMEPANEL_MIN_WIDTH);
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93 left.setMinWidth(THEMEPANEL_MIN_WIDTH);
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94 right.setWidth("*");
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95
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96 VLayout vLayout = new VLayout();
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97 vLayout.setMembersMargin(2);
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98
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99 HLayout hLayout = new HLayout();
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100 hLayout.setWidth100();
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101 hLayout.setHeight100();
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102 hLayout.setMembersMargin(10);
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103
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104 hLayout.addMember(left);
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105 hLayout.addMember(right);
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106
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107 ChartThemePanel ctp = new ChartThemePanel(collection, mode);
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108 ctp.addOutputParameterChangeHandler(this);
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109
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110 right.addChild(createChartPanel());
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111 left.addChild(ctp);
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112
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113 vLayout.addMember(tbarPanel);
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114 vLayout.addMember(hLayout);
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115
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116 setPane(vLayout);
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117
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118 right.addResizedHandler(this);
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119 }
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120
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121
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122 /**
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123 * This method is called after the chart panel has resized. It removes the
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124 * chart - if existing - and requests a new one with adjusted size.
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125 *
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126 * @param event The resize event.
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127 */
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128 public void onResized(ResizedEvent event) {
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129 updateChartPanel();
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130 updateTransformer();
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131 }
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132
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133
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134 /**
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135 * Listens to change event in the chart them panel and updates chart after
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136 * receiving such an event.
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137 *
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138 * @param event The OutputParameterChangeEvent.
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139 */
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140 public void onOutputParameterChanged(OutputParameterChangeEvent event) {
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141 updateChartPanel();
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142 }
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143
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144
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145 /**
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146 * Listens to zoom events and refreshes the current chart in such case.
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147 *
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148 * @param evt The ZoomEvent that stores the coordinates for zooming.
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149 */
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150 public void onZoom(ZoomEvent evt) {
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151 double[] lower = transformer.transform(evt.getStartX(), evt.getStartY());
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152 double[] upper = transformer.transform(evt.getEndX(), evt.getEndY());
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153
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154 xrange[0] = lower[0];
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155 xrange[1] = upper[0];
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156 yrange[0] = upper[1];
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157 yrange[1] = lower[1];
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158
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159 updateChartPanel();
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160 }
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161
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162
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163 /**
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164 * Updates the Transform2D object using the chart info service.
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165 */
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166 public void updateTransformer() {
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167 Canvas chart = getChartPanel();
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168
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169 Config config = Config.getInstance();
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170 String url = config.getServerUrl();
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171 String locale = config.getLocale();
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172
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173 info.getChartInfo(
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174 view.getCollection(),
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175 url,
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176 locale,
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177 mode.getName(),
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178 chart.getWidth(),
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179 chart.getHeight(),
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180 new AsyncCallback<Transform2D>() {
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181 public void onFailure(Throwable caught) {
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182 GWT.log("ERROR: " + caught.getMessage());
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183 }
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184
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185 public void onSuccess(Transform2D transformer) {
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186 setTransformer(transformer);
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187 }
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188 });
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189 }
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190
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191
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192 public void updateChartPanel() {
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193 Canvas[] children = right.getChildren();
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194 for (Canvas child: children) {
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195 right.removeChild(child);
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196 }
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197
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198 right.addChild(createChartPanel(right.getWidth(), right.getHeight()));
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199 }
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200
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201
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202 /**
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203 * Returns the existing chart panel.
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204 *
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205 * @return the existing chart panel.
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206 */
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207 public Canvas getChartPanel() {
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208 Canvas[] children = right.getChildren();
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209
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210 if (children == null || children.length == 0) {
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211 GWT.log("=> No chart image in the panel.");
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212 return right;
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213 }
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214
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215 return children[0];
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216 }
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217
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218
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219 /**
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220 * Returns the Transform2D object used to transform image coordinates into
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221 * chart coordinates.
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222 *
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223 * @return the Transform2D object.
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224 */
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225 public Transform2D getTransformer() {
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226 return transformer;
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227 }
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228
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229
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230 /**
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231 * Set a new Transform2D object for the chart. This should be the case, only
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232 * if the chart image size has changed.
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233 *
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234 * @param transformer The new Transform2D object.
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235 */
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236 protected void setTransformer(Transform2D transformer) {
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237 this.transformer = transformer;
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238 }
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239
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240
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241 /**
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242 * Creates a new chart panel with default size.
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243 *
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244 * @return the created chart panel.
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245 */
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246 protected Canvas createChartPanel() {
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247 return createChartPanel(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT);
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248 }
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249
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250
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251 /**
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252 * Creates a new chart panel with specified width and height.
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253 *
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254 * @param width The width for the chart panel.
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255 * @param height The height for the chart panel.
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256 *
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257 * @return the created chart panel.
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258 */
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259 protected Canvas createChartPanel(int width, int height) {
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260 Img chart = getChartImg(width, height);
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261 chart.setWidth100();
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262 chart.setHeight100();
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263
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264 return chart;
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265 }
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266
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267
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268 /**
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269 * Builds the chart image and returns it.
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270 *
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271 * @param width The chart width.
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272 * @param height The chart height.
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273 *
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274 * @return the chart image.
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275 */
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276 protected Img getChartImg(int width, int height) {
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277 return new Img(getImgUrl(width, height));
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278 }
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279
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280
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281 /**
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282 * Builds the URL that points to the chart image.
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283 *
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284 * @param width The width of the requested chart.
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285 * @param height The height of the requested chart.
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286 * @param xr Optional x range (used for zooming).
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287 * @param yr Optional y range (used for zooming).
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288 *
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289 * @return the URL to the chart image.
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290 */
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291 protected String getImgUrl(int width, int height) {
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292 Config config = Config.getInstance();
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293
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294 String imgUrl = GWT.getModuleBaseURL();
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295 imgUrl += "chart";
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296 imgUrl += "?uuid=" + collection.identifier();
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297 imgUrl += "&type=" + mode.getName();
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298 imgUrl += "&server=" + config.getServerUrl();
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299 imgUrl += "&locale=" + config.getLocale();
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300 imgUrl += "&timestamp=" + new Date().getTime();
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301 imgUrl += "&width=" + Integer.toString(width);
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302 imgUrl += "&height=" + Integer.toString(height);
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303
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304 if (xrange != null) {
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305 GWT.log("Zoom to xrange.");
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306 imgUrl += "&minx=" + Double.toString(xrange[0]);
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307 imgUrl += "&maxx=" + Double.toString(xrange[1]);
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308 }
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309
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310 if (yrange != null) {
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311 GWT.log("Zoom to xrange.");
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312 imgUrl += "&miny=" + Double.toString(yrange[0]);
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313 imgUrl += "&maxy=" + Double.toString(yrange[1]);
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314 }
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315
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316 return imgUrl;
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317 }
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318 }
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319 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org