net/systemeD/potlatch2/TagViewer.mxml

   1 <?xml version="1.0" encoding="utf-8"?>
   2 <mx:VBox
   3         xmlns:mx="http://www.adobe.com/2006/mxml"
   4         xmlns:flexlib="flexlib.containers.*"
   5         xmlns:controls="net.systemeD.controls.*"
   6         horizontalScrollPolicy="off"
   7     backgroundColor="white"
   8     initialize="loadFeatures()">
   9
  10 <mx:ViewStack id="sidebar" width="100%" height="100%" creationPolicy="all">
  11   <mx:VBox id="dndPanel" width="100%" height="100%" horizontalScrollPolicy="off" styleName="dndPanelVbox">
  12     <mx:Text id="dndPanelText" text="{dndPrompt}" width="100%" styleName="helpInfo" />
  13         <mx:Repeater id="dndRep" dataProvider="{MapFeatures.getInstance().getCategoriesForType('point')}">
  14                 <mx:HBox width="100%"><mx:Label text="{dndRep.currentItem.name}:" styleName="dndPanelCategoryLabel"/></mx:HBox>
  15
  16                 <mx:TileList dataProvider="{dndRep.currentItem.getFeaturesForType('point')}" width="100%" height="1"
  17                                      rowHeight="32" columnWidth="32" updateComplete="resizePOIGrid(event)" styleName="dndPanelTileList">
  18                         <mx:itemRenderer>
  19                                 <mx:Component>
  20                                         <mx:VBox toolTip="{data.name}">
  21                                                 <mx:Script><![CDATA[
  22                                                         import mx.events.DragEvent;
  23                                                         import mx.managers.DragManager;
  24                                                         import mx.core.DragSource;
  25
  26                                                         private function dragPOI(event:MouseEvent, tags:Array):void {
  27                                                                 // Get the drag initiator component from the event object.
  28                                                                 var dragInitiator:Image = event.currentTarget as Image;
  29                                                                 var dragSource:DragSource = new DragSource();
  30                                                                 dragSource.addData(tags, 'tags');
  31                                                                 dragSource.addData(event.target.parent.parent.parent.parent, 'container');
  32
  33                                                                 var dragProxy:Image = new Image();
  34                                                                 dragProxy.source = dragInitiator.source;
  35                                                                 dragProxy.width = dragInitiator.width;   // must set width and height explicitly
  36                                                                 dragProxy.height = dragInitiator.height; // for non-embedded images
  37                                                                 DragManager.doDrag(dragInitiator, dragSource, event, dragProxy);
  38                                                         }
  39                                                 ]]></mx:Script>
  40                                                 <mx:Image id="foo" source="{data.image}" height="24" width="24" mouseMove="dragPOI(event, data.tags)" toolTip="{data.name}" />
  41                                         </mx:VBox>
  42                                 </mx:Component>
  43                         </mx:itemRenderer>
  44                 </mx:TileList>
  45         </mx:Repeater>
  46   </mx:VBox>
  47
  48   <mx:VBox id="tagsPanel" width="100%" height="100%" creationPolicy="auto">
  49     <mx:ViewStack id="stack" width="100%" height="100%">
  50       <mx:VBox width="100%" height="100%" label="Simple" id="editorContainer" creationComplete="initEditorStackUIs()">
  51         <mx:HBox width="100%" id="iconContainer" styleName="featureSelector">
  52             <mx:Image id="iconImage"/>
  53             <mx:VBox width="100%" verticalGap="1">
  54               <mx:PopUpButton id="popupChange" creationComplete="initFeatureBox()" openAlways="true" width="100%"/>
  55               <mx:Text condenseWhite="true" width="100%" id="iconText"/>
  56             </mx:VBox>
  57             <mx:LinkButton label="?" click="openDescription()" id="helpLabel" styleName="helpInfo"/>
  58         </mx:HBox>
  59       </mx:VBox>
  60       <mx:VBox width="100%" height="100%" label="Advanced" id="advancedContainer" initialize="checkAdvanced()" verticalGap="1">
  61         <mx:Label id="advancedID">
  62           <mx:htmlText><![CDATA[<i>No Selection</i>]]></mx:htmlText>
  63         </mx:Label>
  64
  65         <mx:DataGrid editable="true" width="100%" height="75%" id="advancedTagGrid"
  66             doubleClickEnabled="true"
  67             doubleClick="if (event.target.parent==advancedTagGrid) { addNewTag(); }">
  68                 <mx:columns>
  69                     <mx:DataGridColumn editable="true" dataField="key" headerText="Key">
  70                                                 <mx:itemEditor>
  71                                                         <mx:Component>
  72                                                                 <controls:AutoComplete
  73                                                                   dataProvider="{autoCompleteKeys()}"
  74                                                                   labelField="name"
  75                                                                   rowCount="10"
  76                                                                   typedText="{getSelectedKey()}">
  77                                                                         <mx:Script><![CDATA[
  78                                                                                 import net.systemeD.potlatch2.mapfeatures.MapFeatures;
  79                                                                                 import mx.collections.ArrayCollection;
  80                                                                                 import mx.controls.DataGrid;
  81
  82                                                                                 public function autoCompleteKeys():Array {
  83                                                                                         var a:Array=[];
  84                                                                                         for each (var k:String in MapFeatures.getInstance().getAutoCompleteKeys()) {
  85                                                                                                 a.push( { name: k } );
  86                                                                                         }
  87                                                                                         return a;
  88                                                                                 }
  89
  90                                                                                 internal function getSelectedKey():String {
  91                                                                                         return DataGrid(this.parent.parent).selectedItem.key;
  92                                                                                 }
  93                                                                         ]]></mx:Script>
  94                                                                 </controls:AutoComplete>
  95                                                         </mx:Component>
  96                                                 </mx:itemEditor>
  97                                         </mx:DataGridColumn>
  98                     <mx:DataGridColumn editable="true" dataField="value" headerText="Value" />
  99                 </mx:columns>
 100         </mx:DataGrid>
 101
 102         <mx:HBox horizontalAlign="right" width="100%">
 103           <mx:LinkButton label="Delete" click="removeTag()" enabled="{advancedTagGrid.selectedItem != null? true : false}"/>
 104           <mx:LinkButton label="Add" click="addNewTag()"/>
 105         </mx:HBox>
 106
 107         <mx:DataGrid editable="true" width="100%" height="25%" id="relationsGrid"
 108             doubleClickEnabled="true"
 109             itemDoubleClick="editRelation(relationsGrid.selectedItem.id)"
 110             doubleClick="if (event.target.parent==relationsGrid) { addToRelation(); }">
 111             <mx:columns>
 112                 <mx:DataGridColumn editable="false" dataField="description" headerText="Relation"/>
 113                 <mx:DataGridColumn editable="false" dataField="id_idx" headerText="ID"/>
 114                 <mx:DataGridColumn editable="true" dataField="role" headerText="Role"/>
 115             </mx:columns>
 116         </mx:DataGrid>
 117
 118         <mx:HBox horizontalAlign="right" width="100%">
 119           <mx:LinkButton label="Remove from" click="removeFromRelation(relationsGrid.selectedItem.id, relationsGrid.selectedItem.index)"
 120                           enabled="{relationsGrid.selectedItem != null? true : false}"/>
 121           <mx:LinkButton label="Add to" click="addToRelation()"/>
 122         </mx:HBox>
 123
 124       </mx:VBox>
 125
 126       <mx:VBox width="100%" height="100%" label="Members" id="membersVBox" initialize="checkMembers()" verticalGap="1">
 127         <mx:Label id="membersText" text="Relation Members"/>
 128         <mx:DataGrid editable="true" width="100%" height="100%" id="membersGrid"
 129                       dragEnabled="true" dragMoveEnabled="true" dropEnabled="true">
 130           <mx:columns>
 131             <mx:DataGridColumn editable="false" dataField="type" headerText="Type"/>
 132             <mx:DataGridColumn editable="false" dataField="id" headerText="ID"/>
 133             <mx:DataGridColumn editable="true" dataField="role" headerText="Role"/>
 134           </mx:columns>
 135         </mx:DataGrid>
 136       </mx:VBox>
 137
 138       </mx:ViewStack>
 139
 140           <mx:HBox width="100%">
 141                 <mx:LinkBar dataProvider="{stack}"/>
 142                 <mx:Spacer width="100%"/>
 143                 <mx:LinkButton
 144                         icon="@Embed('../../../embedded/view_tabbed.png')"
 145                         disabledIcon="@Embed('../../../embedded/view_tabbed_disabled.png')"
 146                         click="setEditorStackUI(true)" id="tabNavigatorLabel" paddingTop="6"
 147                         toolTip="Show in tabs"
 148                         enabled="{editorStack is Accordion &amp;&amp; stack.selectedIndex==0}" />
 149                 <mx:LinkButton
 150                         icon="@Embed('../../../embedded/view_accordion.png')"
 151                         disabledIcon="@Embed('../../../embedded/view_accordion_disabled.png')"
 152                         click="setEditorStackUI(false)" id="accordionLabel" paddingTop="6"
 153                         toolTip="Show in sliding windows"
 154                         enabled="{editorStack is SuperTabNavigator &amp;&amp; stack.selectedIndex==0}" />
 155           </mx:HBox>
 156   </mx:VBox>
 157 </mx:ViewStack>
 158
 159   <mx:Script><![CDATA[
 160       import net.systemeD.halcyon.connection.*;
 161       import net.systemeD.potlatch2.mapfeatures.*;
 162
 163       import mx.collections.*;
 164       import mx.containers.*;
 165       import mx.events.*;
 166       import mx.core.*;
 167       import mx.managers.PopUpManager;
 168       import flash.geom.Point;
 169       import flash.net.*;
 170       import mx.events.DragEvent;
 171       import mx.managers.DragManager;
 172       import mx.core.DragSource;
 173       import flexlib.containers.SuperTabNavigator;
 174
 175       private static const dndPrompt:String="Add new points by dragging them onto the map";
 176
 177       private var editorStackTabNavigator:SuperTabNavigator;
 178       private var editorStackAccordion:Accordion;
 179       [Bindable] private var editorStack:Container;
 180
 181       public var mapFeatures:MapFeatures;
 182       private var selectedEntity:Entity;
 183       private var tagDataProvider:ArrayCollection;
 184       private var tw:CategorySelector = null;
 185       private var feature:Feature = null;
 186
 187       public function setEntity(entity:Entity):void {
 188           UIComponent.suspendBackgroundProcessing();
 189           if ( selectedEntity != entity ) {
 190               if ( selectedEntity != null )
 191                   selectedEntity.removeEventListener(Connection.TAG_CHANGED, tagChanged);
 192               selectedEntity = entity;
 193               if ( selectedEntity != null )
 194                   selectedEntity.addEventListener(Connection.TAG_CHANGED, tagChanged);
 195           }
 196
 197           if ( advancedID != null )
 198               setupAdvanced(entity);
 199           if (entity is Relation) {
 200               stack.addChild(membersVBox);
 201           }
 202           refreshFeatureIcon();
 203           if (selectedEntity == null) {
 204             sidebar.selectedChild = dndPanel;
 205           } else {
 206             initialiseEditors();
 207             sidebar.selectedChild = tagsPanel;
 208           }
 209           UIComponent.resumeBackgroundProcessing();
 210       }
 211
 212       private function refreshFeatureIcon():void {
 213           var oldFeature:Feature = feature;
 214           feature = selectedEntity == null ? null : mapFeatures.findMatchingFeature(selectedEntity);
 215           if ( feature != oldFeature ) {
 216               if ( oldFeature != null )
 217                   oldFeature.removeEventListener("imageChanged", featureImageChanged);
 218               if ( feature != null )
 219                   feature.addEventListener("imageChanged", featureImageChanged);
 220           }
 221
 222           if ( feature != null && feature.name != null ) {
 223               setFeatureIcon(selectedEntity, feature);
 224           } else {
 225               blankFeatureIcon(selectedEntity);
 226           }
 227       }
 228
 229       private function featureImageChanged(event:Event):void {
 230           setFeatureIcon(selectedEntity, feature);
 231       }
 232
 233       private function setFeatureIcon(entity:Entity, feature:Feature):void {
 234           //blankFeatureIcon(entity);
 235
 236           iconImage.source = feature.image;
 237
 238           var txt:String = feature.htmlDetails(entity);
 239           iconText.htmlText = txt;
 240           popupChange.label = feature.name;
 241           setLimitTypes(entity);
 242           tw.setSelectedFeature(feature);
 243           helpLabel.visible = feature.hasHelpURL();
 244       }
 245
 246       private function setLimitTypes(entity:Entity):void {
 247           var type:String = null;
 248           if ( entity is Node )
 249               type = "point";
 250           else if ( entity is Way )
 251               type = Way(entity).isArea() ? "area" : "line";
 252           else if ( entity is Relation )
 253               type = "relation";
 254           tw.setLimitTypes(type);
 255       }
 256
 257       private function blankFeatureIcon(entity:Entity):void {
 258           iconImage.source = null;
 259           popupChange.label = "unknown";
 260           setLimitTypes(entity);
 261                   if (entity == null) {
 262                         iconText.htmlText = "<i>Nothing selected</i>";
 263             tw.setNoSelectedFeature();
 264                   } else if (entity.hasTags()) {
 265                         iconText.htmlText = "<b>Not recognised</b><br/>Try looking at the tags under the advanced properties";
 266             tw.setSelectedFeature(null);
 267                   } else {
 268                         iconText.htmlText = "<b>No tags set</b><br/>Use the menu above to say what this "+entity.getType()+" is";
 269             tw.setSelectedFeature(null);
 270           }
 271           helpLabel.visible = false;
 272       }
 273
 274       private var tabComponents:Object = {};
 275
 276       private function initialiseEditors():void {
 277           editorStack.removeAllChildren();
 278           if ( selectedEntity == null || feature == null )
 279               return;
 280
 281           var editorBox:VBox = createEditorBox();
 282           editorBox.label = "Basic";
 283           editorStack.addChild(editorBox);
 284
 285           var tabs:Object = {};
 286           tabComponents = {};
 287
 288           for each (var factory:EditorFactory in feature.editors) {
 289               if ( factory.presence.isEditorPresent(factory, selectedEntity, null) ) {
 290                   var editor:DisplayObject = factory.createEditorInstance(selectedEntity);
 291                   if ( editor != null )
 292                       editorBox.addChild(editor);
 293               }
 294               var category:String = factory.category;
 295               if (category!='') {
 296                       var tab:VBox = tabs[category];
 297                       if ( tab == null) {
 298                           tab = createEditorBox();
 299                           tab.label = category;
 300                           editorStack.addChild(tab);
 301                           tabs[category] = tab;
 302                           tabComponents[tab] = [];
 303                       }
 304                       var catEditor:DisplayObject = factory.createEditorInstance(selectedEntity);
 305                       if ( catEditor != null )
 306                           tabComponents[tab].push(catEditor);
 307                       //    tab.addChild(catEditor);
 308               }
 309           }
 310       }
 311
 312       private function createEditorBox():VBox {
 313           var box:VBox = new VBox();
 314           box.percentWidth = 100;
 315           box.percentHeight = 100;
 316           box.styleName = "editorContainer";
 317           return box;
 318       }
 319
 320       private function ensureEditorsPopulated(tab:VBox):void {
 321           var components:Array = tabComponents[tab];
 322           if ( components == null || tab == null || tab.numChildren >= components.length )
 323               return;
 324           for each (var component:DisplayObject in components ) {
 325               tab.addChild(component);
 326           }
 327       }
 328
 329         private function initEditorStackUIs():void {
 330                 editorStackTabNavigator = new SuperTabNavigator();
 331                 editorStackTabNavigator.allowTabSqueezing=false;
 332                 editorStackTabNavigator.minTabWidth=10;
 333                 editorStackTabNavigator.closePolicy="close_never";
 334                 editorStackTabNavigator.scrollSpeed=20;
 335                 editorStackTabNavigator.creationPolicy="auto";
 336                 editorStackTabNavigator.percentWidth=100;
 337                 editorStackTabNavigator.percentHeight=100;
 338
 339                 editorStackAccordion = new Accordion();
 340                 editorStackAccordion.percentWidth=100;
 341                 editorStackAccordion.percentHeight=100;
 342                 editorStackAccordion.creationPolicy="auto";
 343
 344                 setEditorStackUI(true);
 345         }
 346
 347         private function setEditorStackUI(isTabbed:Boolean):void {
 348                 var children:Array=[]; var i:uint;
 349
 350                 if (editorStack) {
 351                         // blank existing component
 352                         editorStack.removeEventListener("change",editorStackUIChange);
 353                         editorStack.removeEventListener("updateComplete",editorStackUIUpdate);
 354                         editorStack.removeAllChildren();
 355                         editorContainer.removeChildAt(1);
 356                 }
 357
 358                 // replace with new component
 359                 editorStack = (isTabbed ? editorStackTabNavigator : editorStackAccordion) as Container;
 360                 editorContainer.addChild(editorStack);
 361
 362                 // re-add children and listeners
 363                 initialiseEditors();
 364                 editorStack.addEventListener("change",editorStackUIChange);
 365                 editorStack.addEventListener("updateComplete",editorStackUIUpdate);
 366         }
 367
 368         private function editorStackUIChange(event:Event):void {
 369                 ensureEditorsPopulated(IndexChangedEvent(event).relatedObject as VBox);
 370         }
 371
 372         private function editorStackUIUpdate(event:Event):void {
 373                 if (editorStack is SuperTabNavigator) {
 374                         var e:SuperTabNavigator = editorStack as SuperTabNavigator;
 375                         if (e.selectedIndex<0) { return; }
 376                         for (var i:uint=0; i<e.numChildren; i++) {
 377                                 e.getTabAt(i).selected=(i==e.selectedIndex);
 378                         }
 379                 }
 380         }
 381
 382
 383         public function togglePanel():void {
 384                 if (stack.selectedChild==editorContainer && selectedEntity!=null) {
 385                         stack.selectedChild=advancedContainer;
 386                 } else if (stack.selectedChild!=editorContainer) {
 387                         stack.selectedChild=editorContainer;
 388                 }
 389         }
 390
 391       private function checkAdvanced():void {
 392           if ( selectedEntity != null )
 393              setupAdvanced(selectedEntity);
 394       }
 395
 396       private var listeningToRelations:Array = [];
 397
 398       private function setupAdvanced(entity:Entity):void {
 399           if ( tagDataProvider == null ) {
 400               tagDataProvider = new ArrayCollection();
 401               advancedTagGrid.dataProvider = tagDataProvider;
 402           }
 403
 404           tagDataProvider.removeAll();
 405
 406           if ( entity == null ) {
 407               advancedID.htmlText = "";
 408           } else {
 409               var entityText:String = "xx";
 410               if ( entity is Node ) entityText = "Node";
 411               else if ( entity is Way ) entityText = "Way";
 412               else if ( entity is Relation ) entityText = "Relation";
 413               advancedID.htmlText = entityText+": <b>"+entity.id+"</b>";
 414
 415               var tags:Array = entity.getTagArray();
 416               tags.sortOn("key");
 417               for each(var tag:Tag in tags)
 418                   tagDataProvider.addItem(tag);
 419           }
 420
 421           removeRelationListeners();
 422           if ( selectedEntity != null ) {
 423               selectedEntity.removeEventListener(Connection.ADDED_TO_RELATION, addedToRelation);
 424               selectedEntity.removeEventListener(Connection.REMOVED_FROM_RELATION, removedFromRelation);
 425           }
 426
 427           if ( entity == null ) {
 428               relationsGrid.dataProvider = null;
 429           } else {
 430               resetRelationsGrid(entity);
 431               entity.addEventListener(Connection.ADDED_TO_RELATION, addedToRelation);
 432               entity.addEventListener(Connection.REMOVED_FROM_RELATION, removedFromRelation);
 433           }
 434       }
 435
 436       private function addedToRelation(event:RelationMemberEvent):void {
 437          resetRelationsGrid(selectedEntity);
 438       }
 439
 440       private function removedFromRelation(event:RelationMemberEvent):void {
 441          resetRelationsGrid(selectedEntity);
 442       }
 443
 444       private function removeRelationListeners():void {
 445           for each( var rel:Relation in listeningToRelations ) {
 446               rel.removeEventListener(Connection.TAG_CHANGED, relationTagChanged);
 447               rel.removeEventListener(Connection.RELATION_MEMBER_ADDED, entityRelationMemberChanged);
 448               rel.removeEventListener(Connection.RELATION_MEMBER_REMOVED, entityRelationMemberChanged);
 449           }
 450           listeningToRelations = [];
 451           relationsGrid.removeEventListener(DataGridEvent.ITEM_EDIT_END, relationRoleChanged);
 452       }
 453
 454       private function resetRelationsGrid(entity:Entity):void {
 455           removeRelationListeners();
 456           var relations:Array = [];
 457           for each( var rel:Relation in entity.parentRelations ) {
 458               for each( var memberIndex:int in rel.findEntityMemberIndexes(entity)) {
 459                   var props:Object = {};
 460                   props["relation"] = rel;
 461                   props["id"] = rel.id;
 462                   props["index"] = memberIndex;
 463                   props["role"] = rel.getMember(memberIndex).role;
 464                   props["description"] = rel.getDescription();
 465                   props["id_idx"] = rel.id + "/"+memberIndex;
 466
 467                   relations.push(props);
 468               }
 469
 470               rel.addEventListener(Connection.TAG_CHANGED, relationTagChanged);
 471               rel.addEventListener(Connection.RELATION_MEMBER_ADDED, entityRelationMemberChanged);
 472               rel.addEventListener(Connection.RELATION_MEMBER_REMOVED, entityRelationMemberChanged);
 473               listeningToRelations.push(rel);
 474           }
 475           relationsGrid.dataProvider = relations;
 476           relationsGrid.addEventListener(DataGridEvent.ITEM_EDIT_END, relationRoleChanged, false, -100);
 477       }
 478
 479       private function relationRoleChanged(event:DataGridEvent):void {
 480                 if (event.dataField != 'role') { return; }      // shouldn't really happen
 481
 482                 var relations:Array=event.currentTarget.dataProvider.toArray();
 483                 var props:Object=relations[event.rowIndex];
 484
 485                 var relation:Relation=props['relation'];
 486                 var index:uint=props['index'];
 487                 var newRole:String=event.itemRenderer.data['role'];
 488
 489                 relation.setMember(index, new RelationMember(selectedEntity,newRole));
 490       }
 491
 492       private function relationTagChanged(event:TagEvent):void {
 493           resetRelationsGrid(selectedEntity);
 494       }
 495
 496       private function entityRelationMemberChanged(event:RelationMemberEvent):void {
 497           resetRelationsGrid(selectedEntity);
 498       }
 499
 500       private function checkMembers():void {
 501           if (selectedEntity is Relation) {
 502             setupMembers(selectedEntity as Relation);
 503           }
 504       }
 505
 506       private function setupMembers(rel:Relation):void {
 507           var members:Array = [];
 508           for (var i:int=0 ; i<rel.length; i++) {
 509             var props:Object = {};
 510             var member:RelationMember = rel.getMember(i);
 511             props["id"] = member.entity.id;
 512             props["type"] = member.entity.getType();
 513             props["role"] = member.role;
 514
 515             members.push(props);
 516           }
 517           membersGrid.dataProvider = members;
 518           membersGrid.dataProvider.addEventListener('collectionChange', membersChange);
 519       }
 520
 521       private function membersChange(event:Event):void {
 522           // Dropping all the members and re-adding them isn't exactly optimal
 523           // but is at least robust for any kind of change.
 524           // Figuring out a better way is someone else's FIXME
 525
 526           var conn:Connection = Connection.getConnectionInstance();
 527           var rel:Relation = selectedEntity as Relation
 528
 529           // drop members
 530           for (var i:int=rel.length-1 ; i>=0; i--) {
 531             rel.removeMemberByIndex(i);
 532           }
 533
 534           // add members in new order
 535           for each(var memberObject:Object in membersGrid.dataProvider) {
 536             var e:Entity;
 537             var id:Number = memberObject.id;
 538             if(memberObject.type == 'node') {
 539               e = conn.getNode(id);
 540             } else if (memberObject.type == 'way') {
 541               e = conn.getWay(id);
 542             } else if (memberObject.type == 'relation') {
 543               e = conn.getRelation(id);
 544             }
 545             rel.appendMember(new RelationMember(e, memberObject.role));
 546           }
 547       }
 548
 549       private function editRelation(id:Number):void {
 550           var panel:RelationEditorPanel = RelationEditorPanel(
 551               PopUpManager.createPopUp(Application(Application.application), RelationEditorPanel, true));
 552           panel.setRelation(Connection.getConnectionInstance().getRelation(id));
 553           PopUpManager.centerPopUp(panel);
 554       }
 555
 556       private function tagChanged(event:TagEvent):void {
 557           refreshFeatureIcon();
 558
 559           if ( tagDataProvider != null ) {
 560               // check to see if the key is already in our list
 561               var exists:Boolean = false;
 562               var tag:Tag = null;
 563               var i:uint;
 564               for ( i = 0; i < tagDataProvider.length && !exists; i++ ) {
 565                   tag = Tag(tagDataProvider.getItemAt(i));
 566                   exists = tag.key == event.key;
 567               }
 568               if ( !exists ) {
 569                   tag = new Tag(selectedEntity, event.key, event.newValue);
 570                   tagDataProvider.addItem(tag);
 571                   tagDataProvider.refresh();
 572               } else {
 573                   if ( event.newValue == null ) {
 574                       tagDataProvider.removeItemAt(i-1);
 575                       tagDataProvider.refresh();
 576                   } else {
 577                       tagDataProvider.itemUpdated(tag, "value");
 578                   }
 579               }
 580           }
 581       }
 582
 583       public function loadFeatures():void {
 584           mapFeatures = MapFeatures.getInstance();
 585           stack.removeChild(membersVBox); // remove by default, will be added if relation
 586       }
 587
 588       public function openDescription():void {
 589           if ( feature != null && feature.hasHelpURL() )
 590               navigateToURL(new URLRequest(feature.helpURL), "potlatch_help");
 591       }
 592
 593       public function addNewTag():void {
 594           if (stack.selectedChild!=advancedContainer || selectedEntity == null) { return; }
 595           var newKey:String = "(new tag)";
 596           var newTag:Tag = new Tag(selectedEntity, newKey, "(new value)");
 597           tagDataProvider.addItem(newTag);
 598           advancedTagGrid.editedItemPosition = {rowIndex: tagDataProvider.getItemIndex(newTag), columnIndex: 0};
 599       }
 600
 601       public function removeTag():void {
 602           var k:String = advancedTagGrid.selectedItem.key;
 603           selectedEntity.setTag(k, null, MainUndoStack.getGlobalStack().addAction);
 604       }
 605
 606       public function addToRelation():void {
 607           new RelationSelectPanel().init(selectedEntity,new Object());
 608       }
 609
 610       public function removeFromRelation(id:Number, index:int):void {
 611           Connection.getConnectionInstance().getRelation(id).removeMemberByIndex(index);
 612       }
 613
 614       public function initFeatureBox():void {
 615           tw = new CategorySelector();
 616           tw.addEventListener("selectedType", changeFeatureType);
 617           popupChange.popUp = tw;
 618       }
 619
 620       public function changeFeatureType(event:Event):void {
 621           if ( selectedEntity == null )
 622               return;
 623
 624           UIComponent.suspendBackgroundProcessing();
 625           var newFeature:Feature = tw.selectedType;
 626           var undoStack:Function = MainUndoStack.getGlobalStack().addAction;
 627           var action:CompositeUndoableAction = new CompositeUndoableAction(
 628                   "Set "+selectedEntity.getType()+" "+selectedEntity.id+" to "+newFeature.name);
 629                   selectedEntity.suspend();
 630
 631           // remove tags from the current feature
 632           if ( feature != null ) {
 633               for each( var oldtag:Object in feature.tags ) {
 634                   selectedEntity.setTag(oldtag["k"], null, action.push);
 635               }
 636           }
 637
 638           // set tags for new feature
 639           if ( newFeature != null ) {
 640               for each( var newtag:Object in newFeature.tags ) {
 641                   selectedEntity.setTag(newtag["k"], newtag["v"], action.push);
 642               }
 643           }
 644
 645                   selectedEntity.resume();
 646           undoStack(action);
 647           popupChange.close();
 648           initialiseEditors();
 649           UIComponent.resumeBackgroundProcessing();
 650       }
 651
 652         private function resizePOIGrid(event:Event):void {
 653                 var rows:Number=event.target.dataProvider.length/event.target.columnCount;
 654                 if (rows!=Math.floor(rows)) { rows=Math.floor(rows+1); }
 655                 event.target.height=rows*(event.target.rowHeight+1);
 656         }
 657   ]]></mx:Script>
 658 </mx:VBox>
 659