Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/ParameterList.java @ 60:f793d35bfb08

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Implemented a mechanism to step back to previous states. flys-client/trunk@1523 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 21 Mar 2011 08:28:02 +0000
parents 246af33f621c
children 9b726350ab07
rev   line source
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1 package de.intevation.flys.client.client.ui;
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3 import java.util.ArrayList;
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4 import java.util.List;
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6 import com.google.gwt.core.client.GWT;
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8 import com.smartgwt.client.types.VerticalAlignment;
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9 import com.smartgwt.client.widgets.Canvas;
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10 import com.smartgwt.client.widgets.layout.HLayout;
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11 import com.smartgwt.client.widgets.layout.VLayout;
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13 import de.intevation.flys.client.shared.model.Data;
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14 import de.intevation.flys.client.shared.model.DataList;
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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.StepBackEvent;
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17 import de.intevation.flys.client.client.event.StepBackHandler;
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20 public class ParameterList
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21 extends VLayout
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22 implements StepBackHandler
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23 {
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24 protected CollectionView cView;
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26 protected List<DataList> old;
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27 protected DataList current;
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29 protected UIProvider uiProvider;
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31 protected VLayout oldItems;
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32 protected VLayout currentItems;
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34 public ParameterList(CollectionView cView) {
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35 this.cView = cView;
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36 old = new ArrayList<DataList>();
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37 oldItems = new VLayout();
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38 currentItems = new VLayout();
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40 init();
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41 }
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44 protected void init() {
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45 setWidth(300);
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47 oldItems.setHeight(20);
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48 oldItems.setMembersMargin(10);
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49 currentItems.setHeight("*");
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50 currentItems.setAlign(VerticalAlignment.TOP);
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52 setMembersMargin(20);
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54 addMember(oldItems);
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55 addMember(currentItems);
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56 }
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59 protected void clearOldData() {
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60 old.clear();
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61 }
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64 public void addOldData(DataList old) {
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65 if (old != null) {
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66 this.old.add(old);
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67 }
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69 refreshOld();
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70 }
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73 public void addOldDatas(DataList[] old) {
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74 if (old != null && old.length > 0) {
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75 for (DataList o: old) {
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76 if (!exists(o)) {
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77 GWT.log("Data '" + o.getLabel() + "' is new.");
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78 addOldData(o);
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79 }
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80 }
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82 return;
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83 }
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85 addOldData(null);
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86 }
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89 public boolean exists(DataList data) {
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90 String stateName = data.getState();
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92 for (DataList o: old) {
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93 if (stateName.equals(o.getState())) {
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94 return true;
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95 }
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96 }
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97
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98 return false;
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99 }
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102 public void setCurrentData(DataList current, UIProvider uiProvider) {
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103 this.current = current;
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104 this.uiProvider = uiProvider;
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106 refreshCurrent();
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107 }
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110 public void refreshOld() {
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111 // XXX maybe we should not remove all items but just add the newest item
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112 // to the list.
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113 oldItems.removeMembers(oldItems.getMembers());
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115 for (DataList dataList: old) {
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116 HLayout h = new HLayout();
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117 h.setAlign(VerticalAlignment.TOP);
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118 h.setHeight(20);
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119
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120 String provider = dataList.getUIProvider();
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121 UIProvider uiprovider = UIProviderFactory.getProvider(provider);
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122 ((HasStepBackHandlers) uiprovider).addStepBackHandler(cView);
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123 ((HasStepBackHandlers) uiprovider).addStepBackHandler(this);
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124
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125 oldItems.addMember(uiprovider.createOld(dataList));
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126 }
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127
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128 int minHeight = oldItems.getMinHeight();
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129 if (minHeight <= 20) {
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130 oldItems.setHeight(20);
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131 }
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132 else {
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133 oldItems.setHeight(minHeight);
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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 /**
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139 * This method refreshes the part displaying the data of the current state.
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140 * The UI is created using the UIProvider stored in the Data object.
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141 */
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142 public void refreshCurrent() {
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143 currentItems.removeMembers(currentItems.getMembers());
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144
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145 if (current != null && uiProvider != null) {
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146 Canvas c = uiProvider.create(current);
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147 c.setLayoutAlign(VerticalAlignment.TOP);
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148
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149 currentItems.addMember(c);
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150 }
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151 }
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152
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153
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154 /**
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155 * This method is used to remove all old items from this list after the user
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156 * has clicked the step back button.
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157 *
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158 * @param e The StepBackEvent.
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159 */
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160 public void onStepBack(StepBackEvent e) {
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161 old.clear();
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162 oldItems.removeMembers(oldItems.getMembers());
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163 }
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164 }
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165 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org