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annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/ChartOutputTab.java @ 549:e74bf6bfeeb6

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Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService. flys-client/trunk@2060 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 07 Jun 2011 10:03:19 +0000
parents aff225e07720
children 6050d49eaba3
rev   line source
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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 import java.util.HashMap;
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5 import java.util.Map;
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7 import com.google.gwt.core.client.GWT;
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8 import com.google.gwt.user.client.rpc.AsyncCallback;
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9
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10 import com.smartgwt.client.widgets.Canvas;
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11 import com.smartgwt.client.widgets.Img;
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12
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13 import com.smartgwt.client.widgets.layout.HLayout;
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14 import com.smartgwt.client.widgets.layout.VLayout;
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15
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16 import com.smartgwt.client.widgets.events.ResizedEvent;
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17 import com.smartgwt.client.widgets.events.ResizedHandler;
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18
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19 import de.intevation.flys.client.shared.Transform2D;
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20 import de.intevation.flys.client.shared.model.Collection;
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21 import de.intevation.flys.client.shared.model.OutputMode;
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22 import de.intevation.flys.client.client.Config;
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23 import de.intevation.flys.client.client.event.OutputParameterChangeEvent;
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24 import de.intevation.flys.client.client.event.OutputParameterChangeHandler;
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25 import de.intevation.flys.client.client.event.ZoomEvent;
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26 import de.intevation.flys.client.client.event.ZoomHandler;
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27 import de.intevation.flys.client.client.services.ChartInfoService;
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28 import de.intevation.flys.client.client.services.ChartInfoServiceAsync;
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29 import de.intevation.flys.client.client.ui.CollectionView;
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30 import de.intevation.flys.client.client.ui.OutputTab;
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33 /**
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34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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35 */
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36 public class ChartOutputTab
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37 extends OutputTab
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38 implements ResizedHandler, OutputParameterChangeHandler, ZoomHandler
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39 {
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40 public static final int DEFAULT_CHART_WIDTH = 600;
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41 public static final int DEFAULT_CHART_HEIGHT = 500;
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42
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43 public static final int THEMEPANEL_MIN_WIDTH = 200;
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45
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46 /** The service that is used to fetch chart information.*/
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47 protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class);
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48
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49 /** The transformer used to transform image pixels into chart coordinates.*/
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50 protected Transform2D transformer;
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51
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52 /** The collection view.*/
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53 protected CollectionView view;
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54
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55
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56 /** The canvas that wraps the chart toolbar.*/
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57 protected Canvas tbarPanel;
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58
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59 /** The canvas that wraps the theme editor.*/
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60 protected Canvas left;
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61
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62 /** The canvas that wraps the chart.*/
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63 protected Canvas right;
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65
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66 /** Chart zoom options.*/
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67 protected double[] xrange;
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68 protected double[] yrange;
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71 /**
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72 * The default constructor to create a new ChartOutputTab.
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73 *
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74 * @param title The title of this tab.
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75 * @param collection The Collection which this chart belongs to.
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76 * @param mode The OutputMode.
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77 */
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78 public ChartOutputTab(
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79 String title,
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80 Collection collection,
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81 OutputMode mode,
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82 CollectionView collectionView
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83 ){
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84 super(title, collection, mode);
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85
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86 view = collectionView;
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87 left = new Canvas();
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88 right = new Canvas();
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89 tbarPanel = new ChartToolbar(collectionView, this);
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90 xrange = new double[2];
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91 yrange = new double[2];
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93 left.setBorder("1px solid black");
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94 left.setWidth(THEMEPANEL_MIN_WIDTH);
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95 left.setMinWidth(THEMEPANEL_MIN_WIDTH);
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96 right.setWidth("*");
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97
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98 VLayout vLayout = new VLayout();
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99 vLayout.setMembersMargin(2);
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101 HLayout hLayout = new HLayout();
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102 hLayout.setWidth100();
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103 hLayout.setHeight100();
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104 hLayout.setMembersMargin(10);
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105
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106 hLayout.addMember(left);
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107 hLayout.addMember(right);
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108
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109 ChartThemePanel ctp = new ChartThemePanel(collection, mode);
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110 ctp.addOutputParameterChangeHandler(this);
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111
521
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112 right.addChild(createChartPanel());
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113 left.addChild(ctp);
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114
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115 vLayout.addMember(tbarPanel);
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116 vLayout.addMember(hLayout);
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117
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118 setPane(vLayout);
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119
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120 right.addResizedHandler(this);
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121 }
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122
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123
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124 /**
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125 * This method is called after the chart panel has resized. It removes the
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126 * chart - if existing - and requests a new one with adjusted size.
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127 *
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128 * @param event The resize event.
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129 */
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130 public void onResized(ResizedEvent event) {
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131 updateChartPanel();
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132 updateTransformer();
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133 }
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134
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135
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136 /**
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137 * Listens to change event in the chart them panel and updates chart after
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138 * receiving such an event.
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139 *
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140 * @param event The OutputParameterChangeEvent.
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141 */
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142 public void onOutputParameterChanged(OutputParameterChangeEvent event) {
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143 updateChartPanel();
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144 }
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145
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146
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147 /**
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148 * Listens to zoom events and refreshes the current chart in such case.
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149 *
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150 * @param evt The ZoomEvent that stores the coordinates for zooming.
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151 */
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152 public void onZoom(ZoomEvent evt) {
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153 double[] lower = transformer.transform(evt.getStartX(), evt.getStartY());
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154 double[] upper = transformer.transform(evt.getEndX(), evt.getEndY());
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155
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156 xrange[0] = lower[0];
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157 xrange[1] = upper[0];
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158 yrange[0] = upper[1];
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159 yrange[1] = lower[1];
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160
549
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161 updateTransformer();
542
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162 updateChartPanel();
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163 }
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164
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165
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166 public void resetRanges() {
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167 xrange[0] = 0;
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168 xrange[1] = 0;
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169 yrange[0] = 0;
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170 yrange[1] = 0;
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171
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172 updateChartPanel();
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173 }
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174
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175
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176 /**
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177 * This method is used to zoom out.
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178 *
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179 * @param factor The factor should be between 0-100.
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180 */
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181 public void zoomOut(int factor) {
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182 if (factor < 0 || factor > 100 || xrange == null || yrange == null) {
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183 return;
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184 }
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185
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186 double xadd = (xrange[1] - xrange[0]) / 100 * factor;
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187 double yadd = (yrange[1] - yrange[0]) / 100 * factor;
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188
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189 xrange[0] -= xadd;
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190 xrange[1] += xadd;
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191 yrange[0] -= yadd;
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192 yrange[1] += yadd;
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193
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194 updateChartPanel();
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195 }
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196
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197
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198 /**
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199 * Updates the Transform2D object using the chart info service.
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200 */
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201 public void updateTransformer() {
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202 Config config = Config.getInstance();
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203 String url = config.getServerUrl();
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204 String locale = config.getLocale();
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205
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206 info.getChartInfo(
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207 view.getCollection(),
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208 url,
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209 locale,
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210 mode.getName(),
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211 getChartAttributes(),
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212 new AsyncCallback<Transform2D>() {
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213 public void onFailure(Throwable caught) {
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214 GWT.log("ERROR: " + caught.getMessage());
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215 }
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216
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217 public void onSuccess(Transform2D transformer) {
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218 setTransformer(transformer);
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219 }
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220 });
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221 }
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222
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223
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224 public void updateChartPanel() {
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225 Canvas[] children = right.getChildren();
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226 for (Canvas child: children) {
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227 right.removeChild(child);
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228 }
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229
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230 right.addChild(createChartPanel(right.getWidth(), right.getHeight()));
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231 }
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232
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233
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234 /**
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235 * Returns the existing chart panel.
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236 *
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237 * @return the existing chart panel.
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238 */
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239 public Canvas getChartPanel() {
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240 Canvas[] children = right.getChildren();
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241
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242 if (children == null || children.length == 0) {
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243 GWT.log("=> No chart image in the panel.");
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244 return right;
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245 }
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246
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247 return children[0];
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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 * Returns the Transform2D object used to transform image coordinates into
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253 * chart coordinates.
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254 *
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255 * @return the Transform2D object.
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256 */
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257 public Transform2D getTransformer() {
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258 return transformer;
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259 }
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260
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261
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262 /**
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263 * Set a new Transform2D object for the chart. This should be the case, only
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264 * if the chart image size has changed.
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265 *
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266 * @param transformer The new Transform2D object.
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267 */
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268 protected void setTransformer(Transform2D transformer) {
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269 this.transformer = transformer;
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270 }
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271
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272
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273 /**
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274 * Creates a new chart panel with default size.
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275 *
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276 * @return the created chart panel.
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277 */
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278 protected Canvas createChartPanel() {
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279 return createChartPanel(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT);
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280 }
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281
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282
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283 /**
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284 * Creates a new chart panel with specified width and height.
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285 *
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286 * @param width The width for the chart panel.
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287 * @param height The height for the chart panel.
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288 *
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289 * @return the created chart panel.
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290 */
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291 protected Canvas createChartPanel(int width, int height) {
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292 Img chart = getChartImg(width, height);
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293 chart.setWidth100();
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294 chart.setHeight100();
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295
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296 return chart;
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297 }
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298
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299
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300 /**
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301 * Builds the chart image and returns it.
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302 *
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303 * @param width The chart width.
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304 * @param height The chart height.
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305 *
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306 * @return the chart image.
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307 */
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308 protected Img getChartImg(int width, int height) {
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309 return new Img(getImgUrl(width, height));
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310 }
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311
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312
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313 /**
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314 * Builds the URL that points to the chart image.
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315 *
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316 * @param width The width of the requested chart.
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317 * @param height The height of the requested chart.
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318 * @param xr Optional x range (used for zooming).
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319 * @param yr Optional y range (used for zooming).
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320 *
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321 * @return the URL to the chart image.
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322 */
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323 protected String getImgUrl(int width, int height) {
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324 Config config = Config.getInstance();
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325
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326 String imgUrl = GWT.getModuleBaseURL();
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327 imgUrl += "chart";
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328 imgUrl += "?uuid=" + collection.identifier();
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329 imgUrl += "&type=" + mode.getName();
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330 imgUrl += "&server=" + config.getServerUrl();
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331 imgUrl += "&locale=" + config.getLocale();
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332 imgUrl += "&timestamp=" + new Date().getTime();
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333 imgUrl += "&width=" + Integer.toString(width);
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334 imgUrl += "&height=" + Integer.toString(height);
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335
542
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336 if (xrange != null) {
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337 GWT.log("Zoom to xrange.");
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338 imgUrl += "&minx=" + Double.toString(xrange[0]);
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339 imgUrl += "&maxx=" + Double.toString(xrange[1]);
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340 }
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341
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342 if (yrange != null) {
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343 GWT.log("Zoom to xrange.");
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344 imgUrl += "&miny=" + Double.toString(yrange[0]);
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345 imgUrl += "&maxy=" + Double.toString(yrange[1]);
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346 }
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347
521
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348 return imgUrl;
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349 }
549
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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350
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351
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352 public Map getChartAttributes() {
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353 Map<String, String> attr = new HashMap<String, String>();
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354
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355 Canvas chart = getChartPanel();
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356 attr.put("width", chart.getWidth().toString());
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357 attr.put("height", chart.getHeight().toString());
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358
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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parents: 548
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359 if (xrange != null) {
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360 attr.put("minx", Double.toString(xrange[0]));
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361 attr.put("maxx", Double.toString(xrange[1]));
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parents: 548
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362 }
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parents: 548
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363
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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parents: 548
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364 if (yrange != null) {
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365 attr.put("miny", Double.toString(yrange[0]));
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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366 attr.put("maxy", Double.toString(yrange[1]));
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parents: 548
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367 }
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parents: 548
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368
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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369 return attr;
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370 }
521
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371 }
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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372 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org