Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/ChartOutputTab.java @ 541:ed29599e06e5

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Added the ChartOutputTab as ZoomHandler for the ZoomboxControl - no zooming is done yet. flys-client/trunk@2041 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 01 Jun 2011 14:13:29 +0000
parents 75df57220104
children 7c57149e8715
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
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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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
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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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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21 import de.intevation.flys.client.client.event.OutputParameterChangeEvent;
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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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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
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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
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41 public static final int THEMEPANEL_MIN_WIDTH = 200;
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42
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43
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44
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45 /** The service that is used to fetch chart information.*/
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46 protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class);
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47
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48 /** The transformer used to transform image pixels into chart coordinates.*/
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49 protected Transform2D transformer;
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50
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51 /** The collection view.*/
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52 protected CollectionView view;
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53
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55 /** The canvas that wraps the chart toolbar.*/
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56 protected Canvas tbarPanel;
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57
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58 /** The canvas that wraps the theme editor.*/
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59 protected Canvas left;
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60
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61 /** The canvas that wraps the chart.*/
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62 protected Canvas right;
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63
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64
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65 /**
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66 * The default constructor to create a new ChartOutputTab.
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67 *
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68 * @param title The title of this tab.
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69 * @param collection The Collection which this chart belongs to.
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70 * @param mode The OutputMode.
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71 */
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72 public ChartOutputTab(
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73 String title,
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74 Collection collection,
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75 OutputMode mode,
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76 CollectionView collectionView
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77 ){
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78 super(title, collection, mode);
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79
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80 view = collectionView;
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81 left = new Canvas();
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82 right = new Canvas();
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83 tbarPanel = new ChartToolbar(collectionView, this);
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84
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85 left.setBorder("1px solid black");
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86 left.setWidth(THEMEPANEL_MIN_WIDTH);
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87 left.setMinWidth(THEMEPANEL_MIN_WIDTH);
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88 right.setWidth("*");
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89
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90 VLayout vLayout = new VLayout();
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91 vLayout.setMembersMargin(2);
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93 HLayout hLayout = new HLayout();
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94 hLayout.setWidth100();
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95 hLayout.setHeight100();
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96 hLayout.setMembersMargin(10);
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98 hLayout.addMember(left);
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99 hLayout.addMember(right);
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100
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101 ChartThemePanel ctp = new ChartThemePanel(collection, mode);
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102 ctp.addOutputParameterChangeHandler(this);
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103
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104 right.addChild(createChartPanel());
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105 left.addChild(ctp);
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106
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107 vLayout.addMember(tbarPanel);
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108 vLayout.addMember(hLayout);
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109
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110 setPane(vLayout);
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111
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112 right.addResizedHandler(this);
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113 }
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114
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115
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116 /**
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117 * This method is called after the chart panel has resized. It removes the
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118 * chart - if existing - and requests a new one with adjusted size.
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119 *
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120 * @param event The resize event.
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121 */
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122 public void onResized(ResizedEvent event) {
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123 updateChartPanel();
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124 updateTransformer();
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125 }
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126
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127
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128 /**
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129 * Listens to change event in the chart them panel and updates chart after
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130 * receiving such an event.
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131 *
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132 * @param event The OutputParameterChangeEvent.
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133 */
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134 public void onOutputParameterChanged(OutputParameterChangeEvent event) {
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135 updateChartPanel();
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136 }
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137
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138
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139 /**
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140 * Listens to zoom events and refreshes the current chart in such case.
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141 *
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142 * @param evt The ZoomEvent that stores the coordinates for zooming.
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143 */
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144 public void onZoom(ZoomEvent evt) {
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145 double[] lower = transformer.transform(evt.getStartX(), evt.getStartY());
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146 double[] upper = transformer.transform(evt.getEndX(), evt.getEndY());
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147
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148 double xmin = lower[0];
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149 double xmax = upper[0];
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150 double ymin = upper[1];
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151 double ymax = lower[1];
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152
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153 // TODO Trigger the recreation of the chart
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154 }
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155
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156
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157 /**
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158 * Updates the Transform2D object using the chart info service.
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159 */
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160 public void updateTransformer() {
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161 Canvas chart = getChartPanel();
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162
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163 Config config = Config.getInstance();
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164 String url = config.getServerUrl();
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165 String locale = config.getLocale();
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166
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167 info.getChartInfo(
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168 view.getCollection(),
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169 url,
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170 locale,
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171 mode.getName(),
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172 chart.getWidth(),
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173 chart.getHeight(),
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174 new AsyncCallback<Transform2D>() {
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175 public void onFailure(Throwable caught) {
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176 GWT.log("ERROR: " + caught.getMessage());
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177 }
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178
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179 public void onSuccess(Transform2D transformer) {
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180 setTransformer(transformer);
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181 }
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182 });
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183 }
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184
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185
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186 public void updateChartPanel() {
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187 Canvas[] children = right.getChildren();
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188 for (Canvas child: children) {
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189 right.removeChild(child);
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190 }
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191
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192 right.addChild(createChartPanel(right.getWidth(), right.getHeight()));
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193 }
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194
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195
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196 public Canvas getChartPanel() {
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197 Canvas[] children = right.getChildren();
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198
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199 if (children == null || children.length == 0) {
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200 GWT.log("=> No chart image in the panel.");
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201 return right;
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202 }
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203
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204 return children[0];
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205 }
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206
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207
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208 /**
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209 * Returns the Transform2D object used to transform image coordinates into
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210 * chart coordinates.
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211 *
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212 * @return the Transform2D object.
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213 */
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214 public Transform2D getTransformer() {
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215 return transformer;
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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 * Set a new Transform2D object for the chart. This should be the case, only
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221 * if the chart image size has changed.
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222 *
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223 * @param transformer The new Transform2D object.
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224 */
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225 protected void setTransformer(Transform2D transformer) {
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226 this.transformer = transformer;
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227 }
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228
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229
521
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230 protected Canvas createChartPanel() {
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231 return createChartPanel(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT);
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232 }
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233
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234
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235 protected Canvas createChartPanel(int width, int height) {
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236 Img chart = getChartImg(width, height);
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237 chart.setWidth100();
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238 chart.setHeight100();
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239
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240 return chart;
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241
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242 }
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243
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244
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245 /**
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246 * Builds the chart image and returns it.
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247 *
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248 * @param width The chart width.
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249 * @param height The chart height.
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250 *
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251 * @return the chart image.
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252 */
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253 protected Img getChartImg(int width, int height) {
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254 return new Img(getImgUrl(width, height));
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255 }
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256
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257
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258 /**
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259 * Builds the URL that points to the chart image.
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260 *
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261 * @param width The width of the requested chart.
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262 * @param height The height of the requested chart.
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263 *
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264 * @return the URL to the chart image.
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265 */
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266 protected String getImgUrl(int width, int height) {
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267 Config config = Config.getInstance();
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268
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269 String imgUrl = GWT.getModuleBaseURL();
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270 imgUrl += "chart";
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271 imgUrl += "?uuid=" + collection.identifier();
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272 imgUrl += "&type=" + mode.getName();
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273 imgUrl += "&server=" + config.getServerUrl();
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274 imgUrl += "&locale=" + config.getLocale();
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275 imgUrl += "&timestamp=" + new Date().getTime();
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276 imgUrl += "&width=" + Integer.toString(width);
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277 imgUrl += "&height=" + Integer.toString(height);
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278
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279 return imgUrl;
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280 }
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281 }
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282 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org