Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/ChartOutputTab.java @ 552:6050d49eaba3

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Adapted the ChartInfoService to return more information about charts than before. In addition, the PanControl is added to the chart toolbar. flys-client/trunk@2066 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 07 Jun 2011 13:26:24 +0000
parents e74bf6bfeeb6
children 33b86f5b1168
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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e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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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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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.Axis;
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21 import de.intevation.flys.client.shared.model.ChartInfo;
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22 import de.intevation.flys.client.shared.model.Collection;
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23 import de.intevation.flys.client.shared.model.OutputMode;
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24 import de.intevation.flys.client.client.Config;
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25 import de.intevation.flys.client.client.event.OutputParameterChangeEvent;
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26 import de.intevation.flys.client.client.event.OutputParameterChangeHandler;
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27 import de.intevation.flys.client.client.event.PanEvent;
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28 import de.intevation.flys.client.client.event.PanHandler;
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29 import de.intevation.flys.client.client.event.ZoomEvent;
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30 import de.intevation.flys.client.client.event.ZoomHandler;
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31 import de.intevation.flys.client.client.services.ChartInfoService;
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32 import de.intevation.flys.client.client.services.ChartInfoServiceAsync;
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33 import de.intevation.flys.client.client.ui.CollectionView;
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34 import de.intevation.flys.client.client.ui.OutputTab;
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35
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36
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37 /**
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38 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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39 */
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40 public class ChartOutputTab
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41 extends OutputTab
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42 implements ResizedHandler, OutputParameterChangeHandler, ZoomHandler,
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43 PanHandler
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44 {
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45 public static final int DEFAULT_CHART_WIDTH = 600;
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46 public static final int DEFAULT_CHART_HEIGHT = 500;
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47
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48 public static final int THEMEPANEL_MIN_WIDTH = 200;
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51 /** The service that is used to fetch chart information.*/
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52 protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class);
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53
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54
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55 /** The ChartInfo object that provides information about the current
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56 * chart.*/
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57 protected ChartInfo chartInfo;
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58
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59 /** The transformer used to transform image pixels into chart coordinates.*/
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60 protected Transform2D transformer;
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61
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62 /** The collection view.*/
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63 protected CollectionView view;
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64
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66 /** The canvas that wraps the chart toolbar.*/
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67 protected Canvas tbarPanel;
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68
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69 /** The canvas that wraps the theme editor.*/
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70 protected Canvas left;
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72 /** The canvas that wraps the chart.*/
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73 protected Canvas right;
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75
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76 /** Chart zoom options.*/
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77 protected double[] xrange;
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78 protected double[] yrange;
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79
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81 /**
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82 * The default constructor to create a new ChartOutputTab.
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83 *
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84 * @param title The title of this tab.
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85 * @param collection The Collection which this chart belongs to.
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86 * @param mode The OutputMode.
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87 */
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88 public ChartOutputTab(
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89 String title,
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90 Collection collection,
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91 OutputMode mode,
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92 CollectionView collectionView
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93 ){
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94 super(title, collection, mode);
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95
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96 view = collectionView;
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97 left = new Canvas();
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98 right = new Canvas();
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99 tbarPanel = new ChartToolbar(collectionView, this);
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100 xrange = new double[2];
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101 yrange = new double[2];
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102
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103 left.setBorder("1px solid black");
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104 left.setWidth(THEMEPANEL_MIN_WIDTH);
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105 left.setMinWidth(THEMEPANEL_MIN_WIDTH);
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106 right.setWidth("*");
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107
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108 VLayout vLayout = new VLayout();
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109 vLayout.setMembersMargin(2);
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110
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111 HLayout hLayout = new HLayout();
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112 hLayout.setWidth100();
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113 hLayout.setHeight100();
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114 hLayout.setMembersMargin(10);
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115
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116 hLayout.addMember(left);
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117 hLayout.addMember(right);
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118
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119 ChartThemePanel ctp = new ChartThemePanel(collection, mode);
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120 ctp.addOutputParameterChangeHandler(this);
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121
521
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122 right.addChild(createChartPanel());
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123 left.addChild(ctp);
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124
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125 vLayout.addMember(tbarPanel);
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126 vLayout.addMember(hLayout);
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127
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128 setPane(vLayout);
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129
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130 right.addResizedHandler(this);
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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 * This method is called after the chart panel has resized. It removes the
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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136 * chart - if existing - and requests a new one with adjusted size.
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137 *
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138 * @param event The resize event.
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139 */
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140 public void onResized(ResizedEvent event) {
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141 updateChartPanel();
538
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142 updateTransformer();
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143 }
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144
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145
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146 /**
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147 * Listens to change event in the chart them panel and updates chart after
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148 * receiving such an event.
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149 *
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150 * @param event The OutputParameterChangeEvent.
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151 */
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152 public void onOutputParameterChanged(OutputParameterChangeEvent event) {
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153 updateChartPanel();
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154 }
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155
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156
538
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157 /**
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158 * Listens to zoom events and refreshes the current chart in such case.
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159 *
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160 * @param evt The ZoomEvent that stores the coordinates for zooming.
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161 */
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162 public void onZoom(ZoomEvent evt) {
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163 double[] lower = transformer.transform(evt.getStartX(), evt.getStartY());
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164 double[] upper = transformer.transform(evt.getEndX(), evt.getEndY());
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165
542
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166 xrange[0] = lower[0];
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167 xrange[1] = upper[0];
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168 yrange[0] = upper[1];
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169 yrange[1] = lower[1];
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170
549
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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171 updateTransformer();
542
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172 updateChartPanel();
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173 }
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174
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175
552
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176 public void onPan(PanEvent event) {
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177 int[] start = event.getStartPos();
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178 int[] end = event.getEndPos();
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179
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180 double[] startPos = transformer.transform(start[0], start[1]);
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181 double[] endPos = transformer.transform(end[0], end[1]);
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182
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183 double diffX = startPos[0] - endPos[0];
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184 double diffY = startPos[1] - endPos[1];
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185
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186 panTo(diffX, diffY);
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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 * This method pans to chart with a given factor.
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192 */
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193 public void panTo(double diffX, double diffY) {
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194 Axis xAxis = chartInfo.getXAxis(0);
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195 Axis yAxis = chartInfo.getYAxis(0);
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196
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197 xrange[0] = xAxis.getFrom() + diffX;
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198 xrange[1] = xAxis.getTo() + diffX;
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199 yrange[0] = yAxis.getFrom() + diffY;
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200 yrange[1] = yAxis.getTo() + diffY;
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201
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202 updateTransformer();
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203 updateChartPanel();
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204 }
6050d49eaba3 Adapted the ChartInfoService to return more information about charts than before. In addition, the PanControl is added to the chart toolbar.
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205
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206
543
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207 public void resetRanges() {
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208 xrange[0] = 0;
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209 xrange[1] = 0;
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210 yrange[0] = 0;
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211 yrange[1] = 0;
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212
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213 updateTransformer();
543
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214 updateChartPanel();
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215 }
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216
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217
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218 /**
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219 * This method is used to zoom out.
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220 *
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221 * @param factor The factor should be between 0-100.
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222 */
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223 public void zoomOut(int factor) {
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224 if (factor < 0 || factor > 100 || xrange == null || yrange == null) {
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225 return;
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226 }
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227
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228 double xadd = (xrange[1] - xrange[0]) / 100 * factor;
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229 double yadd = (yrange[1] - yrange[0]) / 100 * factor;
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230
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231 xrange[0] -= xadd;
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232 xrange[1] += xadd;
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233 yrange[0] -= yadd;
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234 yrange[1] += yadd;
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235
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236 updateTransformer();
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237 updateChartPanel();
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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 * Updates the Transform2D object using the chart info service.
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243 */
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244 public void updateTransformer() {
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245 Config config = Config.getInstance();
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246 String url = config.getServerUrl();
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247 String locale = config.getLocale();
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248
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249 info.getChartInfo(
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250 view.getCollection(),
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251 url,
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252 locale,
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253 mode.getName(),
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e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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254 getChartAttributes(),
552
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255 new AsyncCallback<ChartInfo>() {
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256 public void onFailure(Throwable caught) {
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257 GWT.log("ERROR: " + caught.getMessage());
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258 }
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259
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260 public void onSuccess(ChartInfo chartInfo) {
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261 setChartInfo(chartInfo);
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262 }
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263 });
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264 }
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265
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266
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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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267 public void updateChartPanel() {
521
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268 Canvas[] children = right.getChildren();
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269 for (Canvas child: children) {
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270 right.removeChild(child);
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271 }
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272
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273 right.addChild(createChartPanel(right.getWidth(), right.getHeight()));
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274 }
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275
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276
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277 /**
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278 * Returns the existing chart panel.
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279 *
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280 * @return the existing chart panel.
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281 */
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282 public Canvas getChartPanel() {
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283 Canvas[] children = right.getChildren();
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284
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285 if (children == null || children.length == 0) {
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286 GWT.log("=> No chart image in the panel.");
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287 return right;
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288 }
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289
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290 return children[0];
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291 }
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292
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293
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294 public ChartInfo getChartInfo() {
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295 return chartInfo;
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296 }
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297
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298
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299 protected void setChartInfo(ChartInfo chartInfo) {
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300 this.chartInfo = chartInfo;
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301 setTransformer(chartInfo.getTransformer());
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302 }
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303
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304
538
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305 /**
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306 * Returns the Transform2D object used to transform image coordinates into
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307 * chart coordinates.
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308 *
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309 * @return the Transform2D object.
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310 */
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311 public Transform2D getTransformer() {
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312 return transformer;
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313 }
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314
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315
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316 /**
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317 * Set a new Transform2D object for the chart. This should be the case, only
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318 * if the chart image size has changed.
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319 *
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320 * @param transformer The new Transform2D object.
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321 */
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322 protected void setTransformer(Transform2D transformer) {
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323 this.transformer = transformer;
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324 }
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325
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326
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327 /**
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328 * Creates a new chart panel with default size.
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329 *
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330 * @return the created chart panel.
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331 */
521
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332 protected Canvas createChartPanel() {
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333 return createChartPanel(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT);
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334 }
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335
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336
542
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337 /**
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338 * Creates a new chart panel with specified width and height.
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339 *
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340 * @param width The width for the chart panel.
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341 * @param height The height for the chart panel.
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342 *
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343 * @return the created chart panel.
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344 */
521
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345 protected Canvas createChartPanel(int width, int height) {
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346 Img chart = getChartImg(width, height);
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347 chart.setWidth100();
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348 chart.setHeight100();
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349
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350 return chart;
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351 }
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352
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353
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354 /**
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355 * Builds the chart image and returns it.
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356 *
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357 * @param width The chart width.
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358 * @param height The chart height.
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359 *
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360 * @return the chart image.
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361 */
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362 protected Img getChartImg(int width, int height) {
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363 return new Img(getImgUrl(width, height));
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364 }
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365
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366
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367 /**
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368 * Builds the URL that points to the chart image.
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369 *
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370 * @param width The width of the requested chart.
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371 * @param height The height of the requested chart.
542
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372 * @param xr Optional x range (used for zooming).
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373 * @param yr Optional y range (used for zooming).
521
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374 *
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375 * @return the URL to the chart image.
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376 */
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377 protected String getImgUrl(int width, int height) {
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378 Config config = Config.getInstance();
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379
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380 String imgUrl = GWT.getModuleBaseURL();
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381 imgUrl += "chart";
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382 imgUrl += "?uuid=" + collection.identifier();
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383 imgUrl += "&type=" + mode.getName();
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384 imgUrl += "&server=" + config.getServerUrl();
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385 imgUrl += "&locale=" + config.getLocale();
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386 imgUrl += "&timestamp=" + new Date().getTime();
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387 imgUrl += "&width=" + Integer.toString(width);
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388 imgUrl += "&height=" + Integer.toString(height);
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389
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390 if (xrange != null) {
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391 GWT.log("Zoom to xrange.");
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392 imgUrl += "&minx=" + Double.toString(xrange[0]);
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393 imgUrl += "&maxx=" + Double.toString(xrange[1]);
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394 }
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395
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396 if (yrange != null) {
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397 GWT.log("Zoom to xrange.");
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398 imgUrl += "&miny=" + Double.toString(yrange[0]);
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399 imgUrl += "&maxy=" + Double.toString(yrange[1]);
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400 }
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401
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402 return imgUrl;
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403 }
549
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404
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405
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406 public Map getChartAttributes() {
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407 Map<String, String> attr = new HashMap<String, String>();
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408
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409 Canvas chart = getChartPanel();
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410 attr.put("width", chart.getWidth().toString());
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411 attr.put("height", chart.getHeight().toString());
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412
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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413 if (xrange != null) {
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414 attr.put("minx", Double.toString(xrange[0]));
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415 attr.put("maxx", Double.toString(xrange[1]));
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416 }
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417
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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418 if (yrange != null) {
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419 attr.put("miny", Double.toString(yrange[0]));
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420 attr.put("maxy", Double.toString(yrange[1]));
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421 }
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422
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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423 return attr;
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424 }
521
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425 }
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426 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org