Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/AbstractUIProvider.java @ 247:4a684d29404f

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Implemented the createOld() of WQAdaptedInputPanel. flys-client/trunk@1832 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 05 May 2011 09:33:15 +0000
parents 137daff2c732
children 9f16ac843dda
rev   line source
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1 package de.intevation.flys.client.client.ui;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import com.google.gwt.core.client.GWT;
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7
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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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10 import com.smartgwt.client.widgets.events.ClickEvent;
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11 import com.smartgwt.client.widgets.events.ClickHandler;
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12 import com.smartgwt.client.widgets.Button;
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b92281182c6b Removed the FLYSMessages interface and replaced it with a FLYSConstants interface - this interface has the ability to lookup i18n strings with given keys.
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14 import de.intevation.flys.client.client.FLYSConstants;
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15 import de.intevation.flys.client.client.event.HasStepBackHandlers;
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16 import de.intevation.flys.client.client.event.HasStepForwardHandlers;
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17 import de.intevation.flys.client.client.event.StepBackEvent;
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18 import de.intevation.flys.client.client.event.StepBackHandler;
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19 import de.intevation.flys.client.client.event.StepForwardEvent;
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20 import de.intevation.flys.client.client.event.StepForwardHandler;
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21 import de.intevation.flys.client.shared.model.Data;
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4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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22 import de.intevation.flys.client.shared.model.DataItem;
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23 import de.intevation.flys.client.shared.model.DataList;
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24 import de.intevation.flys.client.shared.model.Artifact;
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25
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26 /**
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27 * An abstract UIProvider that provides some basic methods.
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28 *
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29 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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30 */
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31 public abstract class AbstractUIProvider
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32 implements UIProvider, HasStepForwardHandlers, ClickHandler,
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33 HasStepBackHandlers
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34 {
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35 /** The message class that provides i18n strings.*/
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36 protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
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39 /** The StepForwardHandlers.*/
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40 protected List<StepForwardHandler> forwardHandlers;
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42 /** The StepForwardHandlers.*/
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43 protected List<StepBackHandler> backHandlers;
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44
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45 /** The container that is used to position helper widgets.*/
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46 protected Canvas helperContainer;
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47
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48 /** The artifact that contains status information.*/
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49 protected Artifact artifact;
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50
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51 /**
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52 * Creates a new UIProvider instance of this class.
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53 */
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54 public AbstractUIProvider() {
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55 forwardHandlers = new ArrayList<StepForwardHandler>();
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56 backHandlers = new ArrayList<StepBackHandler>();
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57 }
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58
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59
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60 /**
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61 * Appends a StepBackHandler that wants to listen to StepBackEvents.
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62 *
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63 * @param handler A new StepBackHandler.
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64 */
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65 public void addStepBackHandler(StepBackHandler handler) {
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66 if (handler != null) {
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67 backHandlers.add(handler);
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68 }
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69 }
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72 /**
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73 * Appends a StepForwardHandler that wants to listen to StepForwardEvents.
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74 *
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75 * @param handler A new StepForwardHandler.
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76 */
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77 public void addStepForwardHandler(StepForwardHandler handler) {
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78 if (handler != null) {
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79 forwardHandlers.add(handler);
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80 }
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81 }
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83
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84 /**
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85 * This method is called after the user has clicked one of the buttons to
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86 * step back to a previous state.
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87 *
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88 * @param e The StepBackEvent.
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89 */
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90 protected void fireStepBackEvent(StepBackEvent e) {
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91 GWT.log("AbstractUIProvider - fireStepBackEvent() handlers: " + backHandlers.size());
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92 for (StepBackHandler handler: backHandlers) {
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93 handler.onStepBack(e);
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94 }
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95 }
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97
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98 /**
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99 * This method is called after the user has clicked on the 'next' button to
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100 * step to the next state.
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101 *
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102 * @param e The StepForwardEvent.
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103 */
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104 protected void fireStepForwardEvent(StepForwardEvent e) {
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105 GWT.log("AbstractUIProvider - fireStepForwardEvent() handlers: " + forwardHandlers.size());
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106 for (StepForwardHandler handler: forwardHandlers) {
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107 handler.onStepForward(e);
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108 }
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109 }
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110
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111
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112 /**
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113 * This method is used to listen to click events on the 'next' button. The
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114 * fireStepForwardEvent() method is called here.
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115 *
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116 * @param e The click event.
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117 */
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118 public void onClick(ClickEvent e) {
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119 Data[] data = getData();
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120
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121 fireStepForwardEvent(new StepForwardEvent(data));
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122 }
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123
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124
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125 /**
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126 * Creates the 'next' button to step forward to the next state.
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127 *
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128 * @return the 'next' button.
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129 */
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130 protected Canvas getNextButton() {
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131 Button next = new Button(MSG.buttonNext());
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132 next.addClickHandler(this);
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133
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134 return next;
57
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135 }
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136
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137
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138 /**
58
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139 * Creates the 'back' button to step back to a previous state.
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140 *
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141 * @param targetState The identifier of the target state.
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142 *
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143 * @return the 'back' button.
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144 */
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145 protected Canvas getBackButton(final String targetState) {
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146 String url = GWT.getHostPageBaseURL() + MSG.imageBack();
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147 Img back = new Img(url, 16, 16);
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148
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149 back.addClickHandler(new ClickHandler() {
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150 public void onClick(ClickEvent event) {
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151 fireStepBackEvent(new StepBackEvent(targetState));
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152 }
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153 });
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154
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155 return back;
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156 }
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157
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158
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159 /**
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160 * This method injects a container that is used to position helper widgets.
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161 *
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162 * @param helperContainer A container that is used to position helper
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163 * widgets.
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164 */
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165 public void setContainer(Canvas helperContainer) {
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166 this.helperContainer = helperContainer;
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167 }
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168
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169
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170 /**
233
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171 * This method injects an artifact that contains the status information.
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172 *
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173 * @param art An artifact containing status information.
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174 */
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175 public void setArtifact(Artifact art) {
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176 this.artifact = art;
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177 }
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178
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179
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180 /**
247
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181 * This method greps the Data with name <i>name</i> from the list and
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182 * returns it.
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183 *
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184 * @param items A list of Data.
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185 * @param name The name of the Data that we are searching for.
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186 *
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187 * @return the Data with the name <i>name</i>.
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188 */
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189 protected Data getData(List<Data> data, String name) {
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190 for (Data d: data) {
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191 if (name.equals(d.getLabel())) {
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192 return d;
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193 }
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194 }
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195
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196 return null;
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197 }
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198
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199 /**
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200 * This method greps the DataItem with name <i>name</i> from the list and
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201 * returns it.
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202 *
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203 * @param items A list of DataItems.
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204 * @param name The name of the DataItem that we are searching for.
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205 *
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206 * @return the DataItem with the name <i>name</i>.
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207 */
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208 protected DataItem getDataItem(DataItem[] items, String name) {
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209 for (DataItem item: items) {
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210 if (name.equals(item.getLabel())) {
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211 return item;
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212 }
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213 }
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214
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215 return null;
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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 * This method needs to be implemented by concrete subclasses. It should
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221 * create a new Canvas object with a representation of <i>data</i>.
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222 *
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223 * @param data The data that should be displayed.
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224 *
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225 * @return a Canvas object that displays <i>data</i>.
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226 */
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227 public abstract Canvas create(DataList data);
41
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228
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229
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230 /**
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231 * This method needs to be implemented by concrete subclasses. It should
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232 * return the selected data.
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233 *
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234 * @return the selected data.
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235 */
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236 protected abstract Data[] getData();
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237 }
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238 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org