Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/client/ui/AbstractUIProvider.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.client.ui;
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10
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11 import com.google.gwt.core.client.GWT;
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12
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13 import com.smartgwt.client.util.SC;
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14 import com.smartgwt.client.widgets.Button;
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15 import com.smartgwt.client.widgets.Canvas;
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16 import com.smartgwt.client.widgets.Img;
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17 import com.smartgwt.client.widgets.events.ClickEvent;
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18 import com.smartgwt.client.widgets.events.ClickHandler;
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19 import com.smartgwt.client.widgets.layout.VLayout;
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20
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21 import org.dive4elements.river.client.client.FLYSConstants;
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22 import org.dive4elements.river.client.client.event.HasStepBackHandlers;
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23 import org.dive4elements.river.client.client.event.HasStepForwardHandlers;
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24 import org.dive4elements.river.client.client.event.StepBackEvent;
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25 import org.dive4elements.river.client.client.event.StepBackHandler;
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26 import org.dive4elements.river.client.client.event.StepForwardEvent;
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27 import org.dive4elements.river.client.client.event.StepForwardHandler;
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28 import org.dive4elements.river.client.shared.model.Artifact;
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29 import org.dive4elements.river.client.shared.model.ArtifactDescription;
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30 import org.dive4elements.river.client.shared.model.Collection;
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31 import org.dive4elements.river.client.shared.model.Data;
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32 import org.dive4elements.river.client.shared.model.DataItem;
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33 import org.dive4elements.river.client.shared.model.DataList;
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34 import org.dive4elements.river.client.shared.model.DefaultData;
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35 import org.dive4elements.river.client.shared.model.DefaultDataItem;
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36
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37 import java.util.ArrayList;
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38 import java.util.List;
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39
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40
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41 /**
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42 * An abstract UIProvider that provides some basic methods.
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43 *
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44 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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45 */
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46 public abstract class AbstractUIProvider
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47 implements UIProvider, HasStepForwardHandlers, ClickHandler,
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48 HasStepBackHandlers
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49 {
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50 private static final long serialVersionUID = -1610874613377494184L;
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51
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52 /** The message class that provides i18n strings. */
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53 protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
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54
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55 /** The StepForwardHandlers. */
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56 protected List<StepForwardHandler> forwardHandlers;
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57
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58 /** The StepForwardHandlers. */
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59 protected List<StepBackHandler> backHandlers;
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60
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61 /** The container that is used to position helper widgets. */
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62 protected VLayout helperContainer;
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63
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64 /** The artifact that contains status information. */
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65 protected Artifact artifact;
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66
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67 /** The Collection. */
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68 protected Collection collection;
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69
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70 /** The ParameterList. */
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71 protected ParameterList parameterList;
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72
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73 /**
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74 * Creates a new UIProvider instance of this class.
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75 */
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76 public AbstractUIProvider() {
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77 forwardHandlers = new ArrayList<StepForwardHandler>();
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78 backHandlers = new ArrayList<StepBackHandler>();
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79 }
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80
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81
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82 /**
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83 * Appends a StepBackHandler that wants to listen to StepBackEvents.
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84 *
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85 * @param handler A new StepBackHandler.
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86 */
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87 @Override
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88 public void addStepBackHandler(StepBackHandler handler) {
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89 if (handler != null) {
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90 backHandlers.add(handler);
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91 }
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92 }
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93
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94
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95 /**
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96 * Appends a StepForwardHandler that wants to listen to StepForwardEvents.
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97 *
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98 * @param handler A new StepForwardHandler.
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99 */
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100 @Override
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101 public void addStepForwardHandler(StepForwardHandler handler) {
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102 if (handler != null) {
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103 forwardHandlers.add(handler);
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104 }
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105 }
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106
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107
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108 /**
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109 * This method is called after the user has clicked one of the buttons to
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110 * step back to a previous state.
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111 *
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112 * @param e The StepBackEvent.
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113 */
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114 protected void fireStepBackEvent(StepBackEvent e) {
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115 GWT.log("AbstractUIProvider - fireStepBackEvent() handlers: " + backHandlers.size());
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116 for (StepBackHandler handler: backHandlers) {
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117 handler.onStepBack(e);
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118 }
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119 }
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120
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121
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122 /**
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123 * This method is called after the user has clicked on the 'next' button to
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124 * step to the next state.
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125 *
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126 * @param e The StepForwardEvent.
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127 */
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128 protected void fireStepForwardEvent(StepForwardEvent e) {
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129 GWT.log("AbstractUIProvider - fireStepForwardEvent() handlers: " + forwardHandlers.size());
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130 for (StepForwardHandler handler: forwardHandlers) {
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131 handler.onStepForward(e);
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132 }
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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 * This method is used to listen to click events on the 'next' button. The
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138 * fireStepForwardEvent() method is called here.
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139 *
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140 * @param e The click event.
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141 */
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142 @Override
41
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143 public void onClick(ClickEvent e) {
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144 List<String> errors = validate();
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145 if (errors == null || errors.isEmpty()) {
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146 Data[] data = getData();
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147 fireStepForwardEvent(new StepForwardEvent(data));
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148 }
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149 else {
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150 showErrors(errors);
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151 }
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152 }
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153
562
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154
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155 protected void showErrors(List<String> errors) {
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156 StringBuilder sb = new StringBuilder();
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157
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158 for (String error: errors) {
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159 sb.append(error);
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160 sb.append("<br>");
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161 }
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162
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163 SC.warn(sb.toString());
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164 }
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165
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166
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167 /**
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168 * Creates the 'next' button to step forward to the next state.
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169 *
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170 * @return the 'next' button.
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171 */
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172 protected Canvas getNextButton() {
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173 Button next = new Button(MSG.buttonNext());
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174 next.addClickHandler(this);
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175
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176 return next;
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177 }
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178
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179
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180 @Override
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181 public Canvas createHelpLink(DataList dataList, Data data) {
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182 String iUrl = GWT.getHostPageBaseURL() + MSG.getFeatureInfo();
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183 String helpUrl = dataList.getHelpText();
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184
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185 return new ImgLink(iUrl, helpUrl, 30, 30, true);
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186 }
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187
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188
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189 /**
58
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190 * Creates the 'back' button to step back to a previous state.
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191 *
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192 * @param targetState The identifier of the target state.
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193 *
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194 * @return the 'back' button.
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195 */
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196 protected Canvas getBackButton(final String targetState) {
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197 String url = GWT.getHostPageBaseURL() + MSG.imageBack();
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198 Img back = new Img(url, 16, 16);
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199
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200 back.addClickHandler(new ClickHandler() {
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201 @Override
58
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202 public void onClick(ClickEvent event) {
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203 fireStepBackEvent(new StepBackEvent(targetState));
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204 }
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205 });
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206
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207 return back;
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208 }
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209
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210
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211 /**
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212 * This method injects a container that is used to position helper widgets.
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213 *
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214 * @param helperContainer A container that is used to position helper
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215 * widgets.
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216 */
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217 @Override
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218 public void setContainer(VLayout helperContainer) {
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219 this.helperContainer = helperContainer;
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220 }
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221
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222
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223 /**
233
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224 * This method injects an artifact that contains the status information.
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225 *
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226 * @param art An artifact containing status information.
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227 */
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228 @Override
233
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229 public void setArtifact(Artifact art) {
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230 this.artifact = art;
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231 }
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232
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233
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234 @Override
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235 public void setCollection(Collection collection) {
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236 this.collection = collection;
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237 }
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238
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239
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240 @Override
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241 public void setParameterList(ParameterList list) {
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242 this.parameterList = list;
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 909
diff changeset
243 }
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 909
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244
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 909
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245
909
794d1af42987 Clone Artifacts and add them to the current Collection in the WspDatacagePanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 873
diff changeset
246 public Collection getCollection() {
794d1af42987 Clone Artifacts and add them to the current Collection in the WspDatacagePanel.
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parents: 873
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247 return collection;
794d1af42987 Clone Artifacts and add them to the current Collection in the WspDatacagePanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 873
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248 }
794d1af42987 Clone Artifacts and add them to the current Collection in the WspDatacagePanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 873
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249
794d1af42987 Clone Artifacts and add them to the current Collection in the WspDatacagePanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 873
diff changeset
250
233
137daff2c732 Prepared UI elements for the location and distance input tables.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 211
diff changeset
251 /**
247
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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252 * This method greps the Data with name <i>name</i> from the list and
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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253 * returns it.
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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254 *
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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255 * @param items A list of Data.
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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256 * @param name The name of the Data that we are searching for.
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257 *
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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258 * @return the Data with the name <i>name</i>.
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259 */
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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260 protected Data getData(List<Data> data, String name) {
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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261 for (Data d: data) {
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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262 if (name.equals(d.getLabel())) {
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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263 return d;
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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264 }
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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265 }
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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266
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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267 return null;
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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268 }
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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269
873
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 788
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270
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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271 protected String getDataValue(String state, String name) {
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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272 ArtifactDescription desc = artifact.getArtifactDescription();
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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273
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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274 DataList[] old = desc.getOldData();
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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275
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 788
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276 for (DataList list: old) {
5308
7712dacc27ab Avoid NPE if data list is null.
Raimund Renkert <rrenkert@intevation.de>
parents: 5189
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277 if (list == null) {
7712dacc27ab Avoid NPE if data list is null.
Raimund Renkert <rrenkert@intevation.de>
parents: 5189
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278 continue;
7712dacc27ab Avoid NPE if data list is null.
Raimund Renkert <rrenkert@intevation.de>
parents: 5189
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279 }
873
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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280 Data d = getData(list.getAll(), name);
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281
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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282 if (d != null) {
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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283 return d.getItems()[0].getStringValue();
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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284 }
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 788
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285 }
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 788
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286
77a549772aa9 Query MapInfo object for correct river (was hard coded).
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parents: 788
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287 return null;
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 788
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288 }
77a549772aa9 Query MapInfo object for correct river (was hard coded).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 788
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289
247
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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290 /**
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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291 * This method greps the DataItem with name <i>name</i> from the list and
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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292 * returns it.
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
293 *
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
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294 * @param items A list of DataItems.
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
295 * @param name The name of the DataItem that we are searching for.
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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296 *
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
297 * @return the DataItem with the name <i>name</i>.
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
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298 */
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
299 protected DataItem getDataItem(DataItem[] items, String name) {
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
300 for (DataItem item: items) {
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
301 if (name.equals(item.getLabel())) {
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
302 return item;
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
303 }
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
304 }
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
305
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
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parents: 233
diff changeset
306 return null;
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
307 }
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
308
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
309
562
9f16ac843dda Introduced a client side validation before new user data are sent to the server - the range/location panel already implements this validation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 247
diff changeset
310 public List<String> validate() {
5658
995320711d80 Temporary remove classification from floodmap plane theme editor (#801).
Christian Lins <christian.lins@intevation.de>
parents: 5308
diff changeset
311 return new ArrayList<String>(); // FIXME: What's this?
562
9f16ac843dda Introduced a client side validation before new user data are sent to the server - the range/location panel already implements this validation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 247
diff changeset
312 }
9f16ac843dda Introduced a client side validation before new user data are sent to the server - the range/location panel already implements this validation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 247
diff changeset
313
9f16ac843dda Introduced a client side validation before new user data are sent to the server - the range/location panel already implements this validation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 247
diff changeset
314
1591
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
315 /** Create simple DefaultData with single DataItem inside. */
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
316 public static DefaultData createDataArray(String name, String value) {
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
317 DataItem item = new DefaultDataItem(
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
318 name,
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
319 name,
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
320 value);
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
321
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
322 return new DefaultData(name,
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
323 null,
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
324 null,
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
325 new DataItem[] {item});
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
326 }
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
327
8ab010967f78 Refactored.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1586
diff changeset
328
247
4a684d29404f Implemented the createOld() of WQAdaptedInputPanel.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 233
diff changeset
329 /**
41
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
330 * This method needs to be implemented by concrete subclasses. It should
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
331 * create a new Canvas object with a representation of <i>data</i>.
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
332 *
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
333 * @param data The data that should be displayed.
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
334 *
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
335 * @return a Canvas object that displays <i>data</i>.
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
336 */
3384
a6b7f0585761 Merge point/line label styles
Christian Lins <christian.lins@intevation.de>
parents: 2500
diff changeset
337 @Override
51
a2923d63f530 Introduced a data structure DataList to manage to list of Data objects of a single state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 41
diff changeset
338 public abstract Canvas create(DataList data);
41
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
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parents:
diff changeset
339
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
340
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
341 /**
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
342 * This method needs to be implemented by concrete subclasses. It should
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
343 * return the selected data.
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
344 *
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
345 * @return the selected data.
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
346 */
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
347 protected abstract Data[] getData();
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
348 }
87a44f8e25cc Added a new widget that enables the user to enter a location or a distance in a single step.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
349 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org