Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/AbstractUIProvider.java @ 243:11c5bcd349b1
Added a stub implementation of a WQ panel for discharge longitudinal section computations.
flys-client/trunk@1823 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Wed, 04 May 2011 14:05:40 +0000 |
parents | 137daff2c732 |
children | 4a684d29404f |
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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13 |
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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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Introduced a data structure DataList to manage to list of Data objects of a single state.
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22 import de.intevation.flys.client.shared.model.DataList; |
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23 import de.intevation.flys.client.shared.model.Artifact; |
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24 |
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25 /** |
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26 * An abstract UIProvider that provides some basic methods. |
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27 * |
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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29 */ |
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30 public abstract class AbstractUIProvider |
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31 implements UIProvider, HasStepForwardHandlers, ClickHandler, |
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32 HasStepBackHandlers |
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33 { |
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34 /** The message class that provides i18n strings.*/ |
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35 protected FLYSConstants MSG = GWT.create(FLYSConstants.class); |
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36 |
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37 |
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38 /** The StepForwardHandlers.*/ |
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39 protected List<StepForwardHandler> forwardHandlers; |
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40 |
60
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41 /** The StepForwardHandlers.*/ |
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42 protected List<StepBackHandler> backHandlers; |
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43 |
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44 /** The container that is used to position helper widgets.*/ |
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45 protected Canvas helperContainer; |
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46 |
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47 /** The artifact that contains status information.*/ |
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48 protected Artifact artifact; |
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49 |
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50 /** |
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51 * Creates a new UIProvider instance of this class. |
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52 */ |
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53 public AbstractUIProvider() { |
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54 forwardHandlers = new ArrayList<StepForwardHandler>(); |
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55 backHandlers = new ArrayList<StepBackHandler>(); |
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56 } |
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57 |
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58 |
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59 /** |
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60 * Appends a StepBackHandler that wants to listen to StepBackEvents. |
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61 * |
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62 * @param handler A new StepBackHandler. |
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63 */ |
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64 public void addStepBackHandler(StepBackHandler handler) { |
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65 if (handler != null) { |
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66 backHandlers.add(handler); |
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67 } |
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68 } |
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69 |
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70 |
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71 /** |
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72 * Appends a StepForwardHandler that wants to listen to StepForwardEvents. |
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73 * |
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74 * @param handler A new StepForwardHandler. |
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75 */ |
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76 public void addStepForwardHandler(StepForwardHandler handler) { |
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77 if (handler != null) { |
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78 forwardHandlers.add(handler); |
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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 /** |
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84 * This method is called after the user has clicked one of the buttons to |
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85 * step back to a previous state. |
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86 * |
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87 * @param e The StepBackEvent. |
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88 */ |
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89 protected void fireStepBackEvent(StepBackEvent e) { |
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90 GWT.log("AbstractUIProvider - fireStepBackEvent() handlers: " + backHandlers.size()); |
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91 for (StepBackHandler handler: backHandlers) { |
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92 handler.onStepBack(e); |
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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 on the 'next' button to |
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99 * step to the next state. |
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100 * |
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101 * @param e The StepForwardEvent. |
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102 */ |
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103 protected void fireStepForwardEvent(StepForwardEvent e) { |
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104 GWT.log("AbstractUIProvider - fireStepForwardEvent() handlers: " + forwardHandlers.size()); |
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105 for (StepForwardHandler handler: forwardHandlers) { |
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106 handler.onStepForward(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 used to listen to click events on the 'next' button. The |
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113 * fireStepForwardEvent() method is called here. |
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114 * |
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115 * @param e The click event. |
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116 */ |
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117 public void onClick(ClickEvent e) { |
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118 Data[] data = getData(); |
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119 |
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120 fireStepForwardEvent(new StepForwardEvent(data)); |
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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 * Creates the 'next' button to step forward to the next state. |
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126 * |
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127 * @return the 'next' button. |
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128 */ |
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129 protected Canvas getNextButton() { |
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130 Button next = new Button(MSG.buttonNext()); |
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131 next.addClickHandler(this); |
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132 |
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133 return next; |
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134 } |
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135 |
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136 |
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137 /** |
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138 * Creates the 'back' button to step back to a previous state. |
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139 * |
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140 * @param targetState The identifier of the target state. |
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141 * |
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142 * @return the 'back' button. |
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143 */ |
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144 protected Canvas getBackButton(final String targetState) { |
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145 String url = GWT.getHostPageBaseURL() + MSG.imageBack(); |
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146 Img back = new Img(url, 16, 16); |
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147 |
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148 back.addClickHandler(new ClickHandler() { |
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149 public void onClick(ClickEvent event) { |
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150 fireStepBackEvent(new StepBackEvent(targetState)); |
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151 } |
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152 }); |
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153 |
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154 return back; |
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155 } |
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156 |
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157 |
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158 /** |
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159 * This method injects a container that is used to position helper widgets. |
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160 * |
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161 * @param helperContainer A container that is used to position helper |
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162 * widgets. |
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163 */ |
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164 public void setContainer(Canvas helperContainer) { |
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165 this.helperContainer = helperContainer; |
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166 } |
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167 |
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168 |
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169 /** |
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170 * This method injects an artifact that contains the status information. |
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171 * |
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172 * @param art An artifact containing status information. |
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173 */ |
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174 public void setArtifact(Artifact art) { |
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175 this.artifact = art; |
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176 } |
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177 |
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178 |
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179 /** |
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180 * This method needs to be implemented by concrete subclasses. It should |
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181 * create a new Canvas object with a representation of <i>data</i>. |
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182 * |
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183 * @param data The data that should be displayed. |
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184 * |
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185 * @return a Canvas object that displays <i>data</i>. |
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186 */ |
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187 public abstract Canvas create(DataList data); |
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188 |
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189 |
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190 /** |
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191 * This method needs to be implemented by concrete subclasses. It should |
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192 * return the selected data. |
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193 * |
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194 * @return the selected data. |
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195 */ |
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196 protected abstract Data[] getData(); |
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197 } |
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198 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |