Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/AbstractUIProvider.java @ 1591:8ab010967f78

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Refactored. flys-client/trunk@3888 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 03 Feb 2012 08:30:58 +0000
parents dbdf954dbe94
children 69a498896c9c
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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9f16ac843dda Introduced a client side validation before new user data are sent to the server - the range/location panel already implements this validation.
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8 import com.smartgwt.client.util.SC;
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9 import com.smartgwt.client.widgets.Button;
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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 import com.smartgwt.client.widgets.events.ClickEvent;
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13 import com.smartgwt.client.widgets.events.ClickHandler;
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14 import com.smartgwt.client.widgets.layout.VLayout;
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15
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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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16 import de.intevation.flys.client.client.FLYSConstants;
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17 import de.intevation.flys.client.client.event.HasStepBackHandlers;
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18 import de.intevation.flys.client.client.event.HasStepForwardHandlers;
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19 import de.intevation.flys.client.client.event.StepBackEvent;
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20 import de.intevation.flys.client.client.event.StepBackHandler;
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21 import de.intevation.flys.client.client.event.StepForwardEvent;
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22 import de.intevation.flys.client.client.event.StepForwardHandler;
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23 import de.intevation.flys.client.shared.model.Artifact;
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24 import de.intevation.flys.client.shared.model.ArtifactDescription;
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25 import de.intevation.flys.client.shared.model.Collection;
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26 import de.intevation.flys.client.shared.model.Data;
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27 import de.intevation.flys.client.shared.model.DataItem;
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28 import de.intevation.flys.client.shared.model.DataList;
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29
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30 import de.intevation.flys.client.shared.model.DefaultData;
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31 import de.intevation.flys.client.shared.model.DefaultDataItem;
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32
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34 /**
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35 * An abstract UIProvider that provides some basic methods.
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36 *
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37 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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38 */
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39 public abstract class AbstractUIProvider
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40 implements UIProvider, HasStepForwardHandlers, ClickHandler,
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41 HasStepBackHandlers
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42 {
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43 /** The message class that provides i18n strings.*/
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44 protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
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45
41
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46 /** The StepForwardHandlers.*/
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47 protected List<StepForwardHandler> forwardHandlers;
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48
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49 /** The StepForwardHandlers.*/
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50 protected List<StepBackHandler> backHandlers;
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51
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52 /** The container that is used to position helper widgets.*/
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53 protected VLayout helperContainer;
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54
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55 /** The artifact that contains status information.*/
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56 protected Artifact artifact;
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58 /** The Collection.*/
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59 protected Collection collection;
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60
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61 /** The ParameterList.*/
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62 protected ParameterList parameterList;
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63
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64 /**
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65 * Creates a new UIProvider instance of this class.
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66 */
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67 public AbstractUIProvider() {
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68 forwardHandlers = new ArrayList<StepForwardHandler>();
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69 backHandlers = new ArrayList<StepBackHandler>();
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70 }
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71
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72
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73 /**
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74 * Appends a StepBackHandler that wants to listen to StepBackEvents.
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75 *
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76 * @param handler A new StepBackHandler.
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77 */
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78 public void addStepBackHandler(StepBackHandler handler) {
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79 if (handler != null) {
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80 backHandlers.add(handler);
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81 }
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82 }
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83
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84
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85 /**
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86 * Appends a StepForwardHandler that wants to listen to StepForwardEvents.
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87 *
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88 * @param handler A new StepForwardHandler.
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89 */
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90 public void addStepForwardHandler(StepForwardHandler handler) {
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91 if (handler != null) {
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92 forwardHandlers.add(handler);
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93 }
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94 }
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95
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96
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97 /**
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98 * This method is called after the user has clicked one of the buttons to
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99 * step back to a previous state.
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100 *
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101 * @param e The StepBackEvent.
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102 */
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103 protected void fireStepBackEvent(StepBackEvent e) {
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104 GWT.log("AbstractUIProvider - fireStepBackEvent() handlers: " + backHandlers.size());
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105 for (StepBackHandler handler: backHandlers) {
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106 handler.onStepBack(e);
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107 }
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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 * This method is called after the user has clicked on the 'next' button to
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113 * step to the next state.
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114 *
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115 * @param e The StepForwardEvent.
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116 */
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117 protected void fireStepForwardEvent(StepForwardEvent e) {
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118 GWT.log("AbstractUIProvider - fireStepForwardEvent() handlers: " + forwardHandlers.size());
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119 for (StepForwardHandler handler: forwardHandlers) {
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120 handler.onStepForward(e);
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121 }
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122 }
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123
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124
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125 /**
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126 * This method is used to listen to click events on the 'next' button. The
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127 * fireStepForwardEvent() method is called here.
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128 *
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129 * @param e The click event.
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130 */
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131 public void onClick(ClickEvent e) {
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132 List<String> errors = validate();
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133 if (errors == null || errors.isEmpty()) {
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134 Data[] data = getData();
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135 fireStepForwardEvent(new StepForwardEvent(data));
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136 }
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137 else {
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138 showErrors(errors);
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139 }
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140 }
41
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141
562
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142
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143 protected void showErrors(List<String> errors) {
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144 StringBuilder sb = new StringBuilder();
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145
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146 for (String error: errors) {
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147 sb.append(error);
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148 sb.append("<br>");
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149 }
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150
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151 SC.warn(sb.toString());
41
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152 }
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153
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154
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155 /**
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156 * Creates the 'next' button to step forward to the next state.
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157 *
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158 * @return the 'next' button.
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159 */
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160 protected Canvas getNextButton() {
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161 Button next = new Button(MSG.buttonNext());
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162 next.addClickHandler(this);
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163
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164 return next;
57
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165 }
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166
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167
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168 /**
58
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169 * Creates the 'back' button to step back to a previous state.
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170 *
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171 * @param targetState The identifier of the target state.
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172 *
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173 * @return the 'back' button.
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174 */
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175 protected Canvas getBackButton(final String targetState) {
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176 String url = GWT.getHostPageBaseURL() + MSG.imageBack();
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177 Img back = new Img(url, 16, 16);
58
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178
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179 back.addClickHandler(new ClickHandler() {
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180 public void onClick(ClickEvent event) {
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181 fireStepBackEvent(new StepBackEvent(targetState));
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182 }
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183 });
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184
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185 return back;
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186 }
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187
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188
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189 /**
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190 * This method injects a container that is used to position helper widgets.
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191 *
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192 * @param helperContainer A container that is used to position helper
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193 * widgets.
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194 */
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195 public void setContainer(VLayout helperContainer) {
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196 this.helperContainer = helperContainer;
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197 }
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198
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199
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200 /**
233
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201 * This method injects an artifact that contains the status information.
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202 *
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203 * @param art An artifact containing status information.
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204 */
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205 public void setArtifact(Artifact art) {
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206 this.artifact = art;
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207 }
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208
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209
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210 public void setCollection(Collection collection) {
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211 this.collection = collection;
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212 }
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213
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214
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215 public void setParameterList(ParameterList list) {
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216 this.parameterList = list;
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217 }
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218
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219
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220 public Collection getCollection() {
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221 return collection;
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222 }
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223
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224
233
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225 /**
247
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226 * This method greps the Data with name <i>name</i> from the list and
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227 * returns it.
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228 *
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229 * @param items A list of Data.
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230 * @param name The name of the Data that we are searching for.
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231 *
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232 * @return the Data with the name <i>name</i>.
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233 */
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234 protected Data getData(List<Data> data, String name) {
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235 for (Data d: data) {
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236 if (name.equals(d.getLabel())) {
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237 return d;
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238 }
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239 }
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240
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241 return null;
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242 }
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243
873
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244
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245 protected String getDataValue(String state, String name) {
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246 ArtifactDescription desc = artifact.getArtifactDescription();
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247
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248 DataList[] old = desc.getOldData();
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249
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250 for (DataList list: old) {
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251 Data d = getData(list.getAll(), name);
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252
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253 if (d != null) {
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254 return d.getItems()[0].getStringValue();
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255 }
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256 }
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257
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258 return null;
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259 }
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260
247
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261 /**
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262 * This method greps the DataItem with name <i>name</i> from the list and
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263 * returns it.
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264 *
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265 * @param items A list of DataItems.
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266 * @param name The name of the DataItem that we are searching for.
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267 *
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268 * @return the DataItem with the name <i>name</i>.
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269 */
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270 protected DataItem getDataItem(DataItem[] items, String name) {
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271 for (DataItem item: items) {
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272 if (name.equals(item.getLabel())) {
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273 return item;
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274 }
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275 }
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276
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277 return null;
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278 }
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279
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280
562
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281 public List<String> validate() {
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282 return new ArrayList<String>();
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283 }
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284
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285
1591
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286 /** Create simple DefaultData with single DataItem inside. */
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287 public static DefaultData createDataArray(String name, String value) {
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288 DataItem item = new DefaultDataItem(
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289 name,
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290 name,
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291 value);
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292
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293 return new DefaultData(name,
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294 null,
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295 null,
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296 new DataItem[] {item});
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297 }
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298
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299
247
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300 /**
41
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301 * This method needs to be implemented by concrete subclasses. It should
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302 * create a new Canvas object with a representation of <i>data</i>.
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303 *
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304 * @param data The data that should be displayed.
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305 *
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306 * @return a Canvas object that displays <i>data</i>.
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307 */
51
a2923d63f530 Introduced a data structure DataList to manage to list of Data objects of a single state.
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308 public abstract Canvas create(DataList data);
41
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309
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310
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311 /**
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312 * This method needs to be implemented by concrete subclasses. It should
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313 * return the selected data.
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314 *
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315 * @return the selected data.
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316 */
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317 protected abstract Data[] getData();
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318 }
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319 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org