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         xmlns:potlatch2="net.systemeD.potlatch2.*"
   7     xmlns:sidepanel="net.systemeD.potlatch2.panels.*"
   8         horizontalScrollPolicy="off"
   9     backgroundColor="white"
  10     initialize="loadFeatures()">
  11
  12 <mx:ViewStack id="sidebar" width="100%" height="100%" creationPolicy="all">
  13
  14   <!-- Drag & drop icon panel -->
  15
  16   <mx:VBox id="dndPanel" width="100%" height="100%" horizontalScrollPolicy="off" styleName="dndPanelVbox">
  17     <mx:Text id="dndPanelText" text="{dndPrompt}" width="100%" styleName="helpInfo" />
  18         <mx:Repeater id="dndRep" dataProvider="{MapFeatures.getInstance().getCategoriesForType('point')}" styleName="dndRepeater">
  19                 <mx:HBox width="100%" styleName="dndPanelCategory">
  20                         <mx:Label text="{dndRep.currentItem.name}:" styleName="dndPanelCategoryLabel"/>
  21                 </mx:HBox>
  22
  23                 <mx:TileList dataProvider="{dndRep.currentItem.getFeaturesForType('point', true)}" width="100%" height="1"
  24                                      rowHeight="32" columnWidth="32" updateComplete="resizePOIGrid(event)" styleName="dndPanelTileList">
  25                         <mx:itemRenderer>
  26                                 <mx:Component>
  27                                         <mx:VBox toolTip="{data.name}">
  28                                                 <mx:Script><![CDATA[
  29                                                         import mx.events.DragEvent;
  30                                                         import mx.managers.DragManager;
  31                                                         import mx.core.DragSource;
  32
  33                                                         private function dragPOI(event:MouseEvent, tags:Array):void {
  34                                                                 // Get the drag initiator component from the event object.
  35                                                                 var dragInitiator:Image = event.currentTarget as Image;
  36                                                                 var dragSource:DragSource = new DragSource();
  37                                                                 dragSource.addData(tags, 'tags');
  38                                                                 dragSource.addData(event.target.parent.parent.parent.parent, 'container');
  39
  40                                                                 var dragProxy:Image = new Image();
  41                                                                 dragProxy.source = dragInitiator.source;
  42                                                                 dragProxy.width = dragInitiator.width;   // must set width and height explicitly
  43                                                                 dragProxy.height = dragInitiator.height; // for non-embedded images
  44                                                                 DragManager.doDrag(dragInitiator, dragSource, event, dragProxy);
  45                                                         }
  46                                                 ]]></mx:Script>
  47                                                 <mx:Image id="foo" source="{data.dndimage}" height="24" width="24" mouseMove="dragPOI(event, data.tags)" toolTip="{data.name}" />
  48                                         </mx:VBox>
  49                                 </mx:Component>
  50                         </mx:itemRenderer>
  51                 </mx:TileList>
  52         </mx:Repeater>
  53   </mx:VBox>
  54
  55   <!-- Standard tagging panel -->
  56
  57   <mx:VBox id="tagsPanel" width="100%" height="100%" creationPolicy="auto">
  58     <mx:ViewStack id="stack" width="100%" height="100%">
  59       <mx:VBox width="100%" height="100%" label="Simple" id="editorContainer" creationComplete="initEditorStackUIs()" styleName="dndPanelVbox">
  60         <mx:VBox width="100%" verticalGap="1" styleName="dndTagHeader">
  61           <mx:HBox width="100%" id="iconContainer" styleName="featureSelector">
  62             <mx:Image id="iconImage"/>
  63             <mx:Text condenseWhite="true" width="100%" id="iconText" styleName="dndIconText"/>
  64           </mx:HBox>
  65           <mx:HBox width="100%">
  66             <mx:PopUpButton id="popupChange" openAlways="true" width="100%" styleName="dndTagPopUpMenu" closeDuration="0" />
  67             <mx:LinkButton icon="@Embed('../../../embedded/information.svg')" click="openDescription()" id="helpLabel" styleName="helpInfo"/>
  68           </mx:HBox>
  69         </mx:VBox>
  70       </mx:VBox>
  71       <mx:VBox width="100%" height="100%" label="Advanced" id="advancedContainer" initialize="checkAdvanced()" verticalGap="1">
  72         <mx:Label id="advancedID" click="openEntityPage()">
  73           <mx:htmlText><![CDATA[<i>No Selection</i>]]></mx:htmlText>
  74         </mx:Label>
  75
  76                 <potlatch2:TagGrid id="advancedTagGrid" width="100%" height="75%" />
  77
  78         <mx:HBox horizontalAlign="right" width="100%">
  79           <mx:LinkButton label="Delete" click="advancedTagGrid.removeTag()" id="advancedDeleteButton" enabled="{advancedTagGrid.selectedItem != null? true : false}"/>
  80           <mx:LinkButton label="Add" click="advancedTagGrid.addNewTag()" id="advancedAddButton"/>
  81         </mx:HBox>
  82
  83         <mx:DataGrid editable="true" width="100%" height="25%" id="relationsGrid"
  84             doubleClickEnabled="true"
  85             itemDoubleClick="editRelation(relationsGrid.selectedItem.id)"
  86             doubleClick="if (event.target.parent==relationsGrid) { addToRelation(); }">
  87             <mx:columns>
  88                 <mx:DataGridColumn editable="false" dataField="description" headerText="Relation"/>
  89                 <mx:DataGridColumn editable="false" dataField="id_idx" headerText="ID"/>
  90                 <mx:DataGridColumn editable="true" dataField="role" headerText="Role">
  91                     <mx:itemEditor><mx:Component><mx:TextInput restrict="&#x0020;-&#x10FFFF;" /></mx:Component></mx:itemEditor>
  92                 </mx:DataGridColumn>
  93                                 <mx:DataGridColumn width="20" editable="false">
  94                                         <mx:itemRenderer>
  95                                                 <mx:Component>
  96                                     <mx:HBox horizontalAlign="center" verticalAlign="middle">
  97                                                                 <mx:PopUpButton arrowButtonWidth="12" paddingLeft="0" paddingRight="0" width="12" height="12"
  98                                                                                 open="{outerDocument.updateRelationMenu(event);}"
  99                                                                                 creationComplete="{outerDocument.createRelationMenu(PopUpButton(event.target));}"/>
 100                                                         </mx:HBox>
 101                                                 </mx:Component>
 102                                         </mx:itemRenderer>
 103                                 </mx:DataGridColumn>
 104             </mx:columns>
 105         </mx:DataGrid>
 106
 107         <mx:HBox horizontalAlign="right" width="100%">
 108           <mx:LinkButton label="Remove from" click="removeFromRelation(relationsGrid.selectedItem.id, relationsGrid.selectedItem.index)"
 109                           enabled="{relationsGrid.selectedItem != null? true : false}"/>
 110           <mx:LinkButton label="Add to" click="addToRelation()"/>
 111         </mx:HBox>
 112
 113       </mx:VBox>
 114
 115       <mx:VBox width="100%" height="100%" label="Members" id="membersVBox" initialize="checkMembers()" verticalGap="1">
 116         <mx:Label id="membersText" text="Relation Members"/>
 117         <mx:DataGrid editable="true" width="100%" height="100%" id="membersGrid"
 118                       dragEnabled="true" dragMoveEnabled="true" dropEnabled="true">
 119           <mx:columns>
 120             <mx:DataGridColumn editable="false" dataField="type" headerText="Type"/>
 121             <mx:DataGridColumn editable="false" dataField="id" headerText="ID"/>
 122             <mx:DataGridColumn editable="true" dataField="role" headerText="Role">
 123                                 <mx:itemEditor><mx:Component><mx:TextInput restrict="&#x0020;-&#x10FFFF;" /></mx:Component></mx:itemEditor>
 124                         </mx:DataGridColumn>
 125           </mx:columns>
 126         </mx:DataGrid>
 127       </mx:VBox>
 128
 129       </mx:ViewStack>
 130
 131           <mx:HBox width="100%">
 132                 <mx:LinkBar dataProvider="{stack}"/>
 133                 <mx:Spacer width="100%"/>
 134                 <mx:LinkButton
 135                         icon="@Embed('../../../embedded/view_tabbed.png')"
 136                         disabledIcon="@Embed('../../../embedded/view_tabbed_disabled.png')"
 137                         click="setEditorStackUI(true)" id="tabNavigatorLabel" paddingTop="6"
 138                         toolTip="Show in tabs"
 139                         enabled="{editorStack is Accordion &amp;&amp; stack.selectedIndex==0}" />
 140                 <mx:LinkButton
 141                         icon="@Embed('../../../embedded/view_accordion.png')"
 142                         disabledIcon="@Embed('../../../embedded/view_accordion_disabled.png')"
 143                         click="setEditorStackUI(false)" id="accordionLabel" paddingTop="6"
 144                         toolTip="Show in sliding windows"
 145                         enabled="{editorStack is SuperTabNavigator &amp;&amp; stack.selectedIndex==0}" />
 146           </mx:HBox>
 147   </mx:VBox>
 148
 149   <!-- Multiple selection -->
 150
 151   <mx:VBox id="multiplePanel" width="100%" height="100%" horizontalScrollPolicy="off" styleName="dndPanelVbox">
 152     <potlatch2:TagGrid id="multiAdvancedTagGrid" width="100%" height="75%" />
 153         <mx:HBox horizontalAlign="right" width="100%">
 154           <mx:LinkButton label="Delete" click="multiAdvancedTagGrid.removeTag()" enabled="{multiAdvancedTagGrid.selectedItem != null? true : false}"/>
 155           <mx:LinkButton label="Add" click="multiAdvancedTagGrid.addNewTag()" />
 156         </mx:HBox>
 157
 158     <mx:DataGrid editable="true" width="100%" height="25%" id="multiRelationsGrid"
 159         doubleClickEnabled="true"
 160         itemDoubleClick="editRelation(multiRelationsGrid.selectedItem.id)"
 161         doubleClick="if (event.target.parent==multiRelationsGrid) { addToRelation(); }">
 162         <mx:columns>
 163             <mx:DataGridColumn editable="false" dataField="description" headerText="Relation"/>
 164             <mx:DataGridColumn editable="false" dataField="id_idx" headerText="ID"/>
 165             <mx:DataGridColumn editable="true" dataField="role" headerText="Role">
 166                 <mx:itemEditor><mx:Component><mx:TextInput restrict="&#x0020;-&#x10FFFF;" /></mx:Component></mx:itemEditor>
 167             </mx:DataGridColumn>
 168                         <mx:DataGridColumn width="20" editable="false">
 169                                 <mx:itemRenderer>
 170                                         <mx:Component>
 171                             <mx:HBox horizontalAlign="center" verticalAlign="middle">
 172                                                         <mx:PopUpButton arrowButtonWidth="12" paddingLeft="0" paddingRight="0" width="12" height="12"
 173                                                                         open="{outerDocument.updateRelationMenu(event);}"
 174                                                                         creationComplete="{outerDocument.createRelationMenu(PopUpButton(event.target));}"/>
 175                                                 </mx:HBox>
 176                                         </mx:Component>
 177                                 </mx:itemRenderer>
 178                         </mx:DataGridColumn>
 179         </mx:columns>
 180     </mx:DataGrid>
 181     <mx:HBox horizontalAlign="right" width="100%">
 182       <mx:LinkButton label="Remove from" click="removeFromRelation(multiRelationsGrid.selectedItem.id)"
 183                       enabled="{multiRelationsGrid.selectedItem != null? true : false}"/>
 184       <mx:LinkButton label="Add to" click="addToRelation()"/>
 185     </mx:HBox>
 186
 187   </mx:VBox>
 188
 189   <!-- Multiple selection but items cannot be edited -->
 190
 191   <mx:VBox id="multipleInvalidPanel" width="100%" height="100%" horizontalScrollPolicy="off" styleName="dndPanelVbox">
 192         <mx:Text id="multipleInvalidPanelText" text="You have selected multiple items." width="100%" styleName="helpInfo" />
 193   </mx:VBox>
 194
 195   <!-- Generic marker panel -->
 196
 197   <mx:VBox id="markerPanel" width="100%" height="100%" horizontalScrollPolicy="off" styleName="dndPanelVbox">
 198     <sidepanel:MarkerPanel id="markerPanelContents" width="100%"/>
 199   </mx:VBox>
 200
 201   <!-- Bug editing panel -->
 202
 203   <mx:VBox id="bugPanel" width="100%" height="100%" horizontalScrollPolicy="off" styleName="dndPanelVbox">
 204     <sidepanel:BugPanel id="bugPanelContents" width="100%"/>
 205   </mx:VBox>
 206
 207 </mx:ViewStack>
 208
 209   <mx:Script><![CDATA[
 210       import net.systemeD.halcyon.connection.*;
 211       import net.systemeD.halcyon.VectorLayer;
 212       import net.systemeD.potlatch2.mapfeatures.*;
 213
 214       import mx.collections.*;
 215       import mx.containers.*;
 216       import mx.events.*;
 217       import mx.core.*;
 218       import mx.managers.PopUpManager;
 219       import mx.controls.Menu;
 220       import mx.controls.Alert;
 221       import flash.geom.Point;
 222       import flash.net.*;
 223       import mx.events.DragEvent;
 224       import mx.managers.DragManager;
 225       import mx.core.DragSource;
 226       import flexlib.containers.SuperTabNavigator;
 227
 228       [Bindable]
 229       public var dndPrompt:String="Add new points by dragging them onto the map";
 230
 231       private var editorStackTabNavigator:SuperTabNavigator;
 232       private var editorStackAccordion:Accordion;
 233       [Bindable] private var editorStack:Container;
 234
 235       public var mapFeatures:MapFeatures;
 236       private var selectedEntity:Entity;
 237       private var connection:Connection;
 238       private var currentCategorySelector:CategorySelector;
 239       private var categorySelectors:Object = {};        // hash of categorySelectors for each limitType
 240       private var feature:Feature = null;
 241
 242       private var rowData:Object;               // relation membership reference, needed so it's accessible from relation actions menu
 243
 244           public function setEntity(entities:Array, layer:VectorLayer=null):void {
 245                 UIComponent.suspendBackgroundProcessing();
 246                 connection=null;
 247
 248                 var firstSelected:Entity=null;
 249                 if (entities.length==1) { firstSelected=entities[0]; }
 250
 251                 if (selectedEntity!=firstSelected && selectedEntity!=null) {
 252                         selectedEntity.removeEventListener(Connection.TAG_CHANGED, tagChanged);
 253                         selectedEntity.removeEventListener(Connection.ADDED_TO_RELATION, addedToRelation);
 254                         selectedEntity.removeEventListener(Connection.REMOVED_FROM_RELATION, removedFromRelation);
 255                 }
 256
 257                 if (entities.length==0) {
 258                         // Nothing selected, so show drag-and-drop panel
 259                         sidebar.selectedChild = dndPanel;
 260
 261                 } else if (entities.length==1) {
 262                         // Single entity selected, so show tag panel
 263                         selectedEntity=firstSelected;
 264                         connection=firstSelected.connection;
 265                         if (selectedEntity!=null) { selectedEntity.addEventListener(Connection.TAG_CHANGED, tagChanged); }
 266                         if (advancedID!=null) { setupAdvanced(firstSelected); }
 267                         if (firstSelected is Relation) { stack.addChild(membersVBox); }
 268             if (selectedEntity is Marker && layer is BugLayer) {
 269               bugPanelContents.init(selectedEntity, layer);
 270               sidebar.selectedChild = bugPanel;
 271             } else if (selectedEntity is Marker) {
 272               markerPanelContents.init(selectedEntity, layer);
 273               sidebar.selectedChild = markerPanel;
 274             } else {
 275               refreshFeatureIcon();
 276               initialiseEditors();
 277               sidebar.selectedChild = tagsPanel;
 278             }
 279
 280                 } else if(isMultipleEditable(entities)) {
 281                         selectedEntity = new EntityCollection(entities);
 282                         selectedEntity.addEventListener(Connection.TAG_CHANGED, tagChanged);
 283             sidebar.selectedChild = multiplePanel;
 284                         setupMultiAdvanced(selectedEntity);
 285                         connection=entities[0].connection;
 286
 287                 } else {
 288                         //The selection contains elements which can't be edited all together.
 289                         sidebar.selectedChild = multipleInvalidPanel;
 290                 }
 291                 UIComponent.resumeBackgroundProcessing();
 292       }
 293
 294       private function refreshFeatureIcon():void {
 295           var oldFeature:Feature = feature;
 296           feature = selectedEntity == null ? null : mapFeatures.findMatchingFeature(selectedEntity);
 297           if ( feature != oldFeature ) {
 298               if ( oldFeature != null )
 299                   oldFeature.removeEventListener("imageChanged", featureImageChanged);
 300               if ( feature != null )
 301                   feature.addEventListener("imageChanged", featureImageChanged);
 302           }
 303           setCategorySelector(selectedEntity, feature);
 304       }
 305
 306       private function featureImageChanged(event:Event):void {
 307           setCategorySelector(selectedEntity, feature);
 308       }
 309
 310       /** Set the icon, categorySelector and help text for the current entity. */
 311       private function setCategorySelector(entity:Entity, feature:Feature):void {
 312                         // Remove the "user has selected something" event listener from previous categorySelector,
 313                         // and make it invisible because Flex is crap at updating click areas otherwise
 314                         if (currentCategorySelector) {
 315                                 currentCategorySelector.removeEventListener("selectedType", changeFeatureType);
 316                                 currentCategorySelector.visible=false;
 317                         }
 318
 319                         // Have we cached the categorySelector for this limitType? If not, create one
 320                         var lt:String=limitType(entity);
 321                         if (!categorySelectors[lt]) {
 322                                 categorySelectors[lt]=new CategorySelector();
 323                                 categorySelectors[lt].setLimitTypes(lt);
 324                         }
 325                         currentCategorySelector=categorySelectors[lt];
 326                         currentCategorySelector.addEventListener("selectedType", changeFeatureType, false, 0, true);
 327
 328                         // Update surrounding icon/text display
 329                         if (feature) {
 330                                 iconImage.source = feature.image;
 331                                 iconText.htmlText = feature.htmlDetails(entity);
 332                                 popupChange.label = feature.name;
 333                                 helpLabel.visible = feature.hasHelpURL();
 334                                 currentCategorySelector.setSelectedFeature(feature);
 335                         } else {
 336                                 iconImage.source = null;
 337                                 popupChange.label = "unknown";
 338                                 helpLabel.visible = false;
 339                                 if (entity==null) {
 340                                         iconText.htmlText = "<i>Nothing selected</i>";
 341                                 } else if (entity.hasTags()) {
 342                                         iconText.htmlText = "<b>Not recognised</b><br/><font size='10pt'>Try looking at the tags under the advanced properties</font>";
 343                                 } else {
 344                                         iconText.htmlText = "<b>No tags set</b><br/><font size='10pt'>Please use the menu below to define what this "+entity.getType()+" is</font>";
 345                                 }
 346                                 currentCategorySelector.setSelectedFeature(null);
 347                         }
 348
 349                         // Set it as the popup, and make sure it's visible
 350                         popupChange.popUp=currentCategorySelector;
 351                         currentCategorySelector.visible=true;
 352       }
 353
 354           private function isMultipleEditable(entities:Array):Boolean {
 355                 for each(var entity:Entity in entities) {
 356                         if(!(entity is Node || entity is Way))
 357                                 return false;
 358                 }
 359                 return true;
 360           }
 361
 362       private function limitType(entity:Entity):String {
 363           if      (entity is Node    ) return "point";
 364           else if (entity is Way     ) return Way(entity).isArea() ? "area" : "line";
 365           else if (entity is Relation) return "relation";
 366           return null;
 367       }
 368
 369       private var tabComponents:Object = {};
 370
 371       private function initialiseEditors():void {
 372           editorStack.removeAllChildren();
 373           if ( selectedEntity == null || feature == null )
 374               return;
 375
 376           var editorBox:VBox = createEditorBox();
 377           editorBox.label = "Basic";
 378           editorStack.addChild(editorBox);
 379
 380           var tabs:Object = {};
 381           tabComponents = {};
 382
 383           for each (var factory:EditorFactory in feature.editors) {
 384               if ( factory.presence.isEditorPresent(factory, selectedEntity, null) ) {
 385                   var editor:DisplayObject = factory.createEditorInstance(selectedEntity);
 386                   if ( editor != null )
 387                       editorBox.addChild(editor);
 388               }
 389               var category:String = factory.category;
 390               if (category!='') {
 391                       var tab:VBox = tabs[category];
 392                       if ( tab == null) {
 393                           tab = createEditorBox();
 394                           tab.label = category;
 395                           editorStack.addChild(tab);
 396                           tabs[category] = tab;
 397                           tabComponents[tab] = [];
 398                       }
 399                       var catEditor:DisplayObject = factory.createEditorInstance(selectedEntity);
 400                       if ( catEditor != null )
 401                           tabComponents[tab].push(catEditor);
 402                       //    tab.addChild(catEditor);
 403               }
 404           }
 405       }
 406
 407       private function createEditorBox():VBox {
 408           var box:VBox = new VBox();
 409           box.percentWidth = 100;
 410           box.percentHeight = 100;
 411           box.styleName = "dndEditorContainer";
 412           return box;
 413       }
 414
 415       private function ensureEditorsPopulated(tab:VBox):void {
 416           var components:Array = tabComponents[tab];
 417           if ( components == null || tab == null || tab.numChildren >= components.length )
 418               return;
 419           for each (var component:DisplayObject in components ) {
 420               tab.addChild(component);
 421           }
 422       }
 423
 424         private function initEditorStackUIs():void {
 425                 editorStackTabNavigator = new SuperTabNavigator();
 426                 editorStackTabNavigator.allowTabSqueezing=false;
 427                 editorStackTabNavigator.minTabWidth=10;
 428                 editorStackTabNavigator.closePolicy="close_never";
 429                 editorStackTabNavigator.scrollSpeed=20;
 430                 editorStackTabNavigator.creationPolicy="auto";
 431                 editorStackTabNavigator.percentWidth=100;
 432                 editorStackTabNavigator.percentHeight=100;
 433                 editorStackTabNavigator.styleName="dndStackTab";
 434                 editorStackTabNavigator.popUpButtonPolicy="off"
 435
 436
 437                 editorStackAccordion = new Accordion();
 438                 editorStackAccordion.percentWidth=100;
 439                 editorStackAccordion.percentHeight=100;
 440                 editorStackAccordion.creationPolicy="auto";
 441                 editorStackAccordion.styleName="dndStackAccordion";
 442
 443                 setEditorStackUI(true);
 444         }
 445
 446         private function setEditorStackUI(isTabbed:Boolean):void {
 447                 var children:Array=[]; var i:uint;
 448
 449                 if (editorStack) {
 450                         // blank existing component
 451                         editorStack.removeEventListener("change",editorStackUIChange);
 452                         editorStack.removeEventListener("updateComplete",editorStackUIUpdate);
 453                         editorStack.removeAllChildren();
 454                         editorContainer.removeChildAt(1);
 455                 }
 456
 457                 // replace with new component
 458                 editorStack = (isTabbed ? editorStackTabNavigator : editorStackAccordion) as Container;
 459                 editorContainer.addChild(editorStack);
 460
 461                 // re-add children and listeners
 462                 initialiseEditors();
 463                 editorStack.addEventListener("change",editorStackUIChange);
 464                 editorStack.addEventListener("updateComplete",editorStackUIUpdate);
 465         }
 466
 467         private function editorStackUIChange(event:Event):void {
 468                 ensureEditorsPopulated(IndexChangedEvent(event).relatedObject as VBox);
 469         }
 470
 471         private function editorStackUIUpdate(event:Event):void {
 472                 if (editorStack is SuperTabNavigator) {
 473                         var e:SuperTabNavigator = editorStack as SuperTabNavigator;
 474                         if (e.selectedIndex<0) { return; }
 475                         for (var i:uint=0; i<e.numChildren; i++) {
 476                                 e.getTabAt(i).selected=(i==e.selectedIndex);
 477                         }
 478                 }
 479         }
 480
 481
 482         public function togglePanel():void {
 483                 if (stack.selectedChild==editorContainer && selectedEntity!=null) {
 484                         stack.selectedChild=advancedContainer;
 485                 } else if (stack.selectedChild!=editorContainer) {
 486                         stack.selectedChild=editorContainer;
 487                 }
 488         }
 489
 490         public function selectAdvancedPanel():void {
 491                 checkAdvanced();
 492                 stack.selectedChild=advancedContainer;
 493         }
 494
 495       private function checkAdvanced():void {
 496           if ( selectedEntity != null )
 497              setupAdvanced(selectedEntity);
 498       }
 499
 500       private var listeningToRelations:Array = [];
 501
 502       private function setupAdvanced(entity:Entity):void {
 503                 if (!advancedTagGrid) advancedContainer.createComponentsFromDescriptors();      // if Flex hasn't created it, force it
 504                 advancedTagGrid.init(entity);
 505
 506                 if ( entity == null ) {
 507                         advancedID.htmlText = "";
 508                 } else {
 509                         var entityText:String = "xx";
 510                         if      ( entity is Node     ) entityText = "Node";
 511                         else if ( entity is Way      ) entityText = "Way";
 512                         else if ( entity is Relation ) entityText = "Relation";
 513                         advancedID.htmlText = entityText+": <b>"+entity.id+"</b>";
 514                 }
 515
 516                 removeRelationListeners();
 517
 518                 if ( entity == null ) {
 519                         relationsGrid.dataProvider = null;
 520                 } else {
 521                         resetRelationsGrid(entity);
 522                         entity.addEventListener(Connection.ADDED_TO_RELATION, addedToRelation);
 523                         entity.addEventListener(Connection.REMOVED_FROM_RELATION, removedFromRelation);
 524                 }
 525       }
 526
 527           private function setupMultiAdvanced(entity:Entity):void {
 528                 multiAdvancedTagGrid.init(entity);
 529                 resetRelationsGrid(entity);
 530                 entity.addEventListener(Connection.ADDED_TO_RELATION, addedToRelation, false, 0, true);
 531                 entity.addEventListener(Connection.REMOVED_FROM_RELATION, removedFromRelation, false, 0, true);
 532       }
 533
 534           public function addNewTag():void {
 535                 if (stack.selectedChild!=advancedContainer) { return; }
 536                 advancedTagGrid.addNewTag();
 537           }
 538
 539       private function addedToRelation(event:RelationMemberEvent):void {
 540          resetRelationsGrid(selectedEntity);
 541       }
 542
 543       private function removedFromRelation(event:RelationMemberEvent):void {
 544          resetRelationsGrid(selectedEntity);
 545       }
 546
 547       private function removeRelationListeners():void {
 548           for each( var rel:Relation in listeningToRelations ) {
 549               rel.removeEventListener(Connection.TAG_CHANGED, relationTagChanged);
 550               rel.removeEventListener(Connection.RELATION_MEMBER_ADDED, entityRelationMemberChanged);
 551               rel.removeEventListener(Connection.RELATION_MEMBER_REMOVED, entityRelationMemberChanged);
 552           }
 553           listeningToRelations = [];
 554           if (relationsGrid) relationsGrid.removeEventListener(DataGridEvent.ITEM_EDIT_END, relationRoleChanged);
 555           if (multiRelationsGrid) multiRelationsGrid.removeEventListener(DataGridEvent.ITEM_EDIT_END, relationRoleChanged);
 556       }
 557
 558       private function resetRelationsGrid(entity:Entity):void {
 559           removeRelationListeners();
 560
 561           var instance:DataGrid=relationsGrid;
 562           if (entity is EntityCollection) instance=multiRelationsGrid;
 563           var memberships:Array = entity.getRelationMemberships();
 564           for each (var m:Object in memberships) {
 565               m.relation.addEventListener(Connection.TAG_CHANGED, relationTagChanged);
 566               m.relation.addEventListener(Connection.RELATION_MEMBER_ADDED, entityRelationMemberChanged);
 567               m.relation.addEventListener(Connection.RELATION_MEMBER_REMOVED, entityRelationMemberChanged);
 568               listeningToRelations.push(m.relation);
 569           }
 570           instance.dataProvider = memberships;
 571           instance.addEventListener(DataGridEvent.ITEM_EDIT_END, relationRoleChanged, false, -100);
 572       }
 573
 574       private function relationRoleChanged(event:DataGridEvent):void {
 575                 if (event.dataField != 'role') { return; }      // shouldn't really happen
 576
 577                 var relations:Array=event.currentTarget.dataProvider.toArray();
 578                 var props:Object=relations[event.rowIndex];
 579
 580                 var relation:Relation=props['relation'];
 581                 var newRole:String=event.itemRenderer.data['role'];
 582
 583                 if (selectedEntity is EntityCollection) {
 584                         for each (var entity:Entity in EntityCollection(selectedEntity).entities) {
 585                                 var indexes:Array=relation.findEntityMemberIndexes(entity);
 586                                 for each (var index:int in indexes) {
 587                                         relation.setMember(index, new RelationMember(entity,newRole), MainUndoStack.getGlobalStack().addAction);
 588                                 }
 589                         }
 590                 } else {
 591                         relation.setMember(props['index'], new RelationMember(selectedEntity,newRole), MainUndoStack.getGlobalStack().addAction);
 592                 }
 593       }
 594
 595       private function relationTagChanged(event:TagEvent):void {
 596           resetRelationsGrid(selectedEntity);
 597       }
 598
 599       private function entityRelationMemberChanged(event:RelationMemberEvent):void {
 600           resetRelationsGrid(selectedEntity);
 601       }
 602
 603       private function checkMembers():void {
 604           if (selectedEntity is Relation) {
 605             setupMembers(selectedEntity as Relation);
 606           }
 607       }
 608
 609       private function setupMembers(rel:Relation):void {
 610           var members:Array = [];
 611           for (var i:int=0 ; i<rel.length; i++) {
 612             var props:Object = {};
 613             var member:RelationMember = rel.getMember(i);
 614             props["id"] = member.entity.id;
 615             props["type"] = member.entity.getType();
 616             props["role"] = member.role;
 617
 618             members.push(props);
 619           }
 620           membersGrid.dataProvider = members;
 621           membersGrid.dataProvider.addEventListener('collectionChange', membersChange);
 622       }
 623
 624       private function membersChange(event:Event):void {
 625           // Dropping all the members and re-adding them isn't exactly optimal
 626           // but is at least robust for any kind of change.
 627           // Figuring out a better way is someone else's FIXME
 628
 629           var rel:Relation = selectedEntity as Relation;
 630           var action:CompositeUndoableAction = new CompositeUndoableAction("Rearrange relation members for "+rel);
 631
 632           // drop members
 633           for (var i:int=rel.length-1 ; i>=0; i--) {
 634             rel.removeMemberByIndex(i, action.push);
 635           }
 636
 637           // add members in new order
 638           for each(var memberObject:Object in membersGrid.dataProvider) {
 639             var e:Entity;
 640             var id:Number = memberObject.id;
 641                         switch (memberObject.type) {
 642                                 case 'node':            e = connection.getNode(id); break;
 643                 case 'way':                     e = connection.getWay(id); break;
 644                                 case 'relation':        e = connection.getRelation(id); break;
 645             }
 646             rel.appendMember(new RelationMember(e, memberObject.role), action.push);
 647           }
 648           MainUndoStack.getGlobalStack().addAction(action);
 649       }
 650
 651       private function editRelation(id:Number):void {
 652           var panel:RelationEditorPanel = RelationEditorPanel(
 653               PopUpManager.createPopUp(Application(Application.application), RelationEditorPanel, true));
 654           panel.setRelation(connection.getRelation(id));
 655           PopUpManager.centerPopUp(panel);
 656       }
 657
 658         /** Create relation actions menu */
 659
 660         public function createRelationMenu(button:PopUpButton):void {
 661                 var menu:Menu = new Menu();
 662                 var dp:Object = [ {label: "Select all members"},
 663                                                   {label: "Deselect all members"},
 664                                                   {label: "Add selection to this relation", enabled: false},
 665                                                   {label: "Delete relation"} ];
 666                 menu.dataProvider = dp;
 667                 menu.addEventListener("itemClick", selectRelationMenu);
 668                 button.popUp = menu;
 669         }
 670
 671         /** Enable 'add selection to...' entry only if some of the selection isn't in the relation.
 672             Called each time the menu is clicked. */
 673
 674         public function updateRelationMenu(event:Event):void {
 675                 rowData=event.target.parent.data;       // this makes it accessible from selectRelationMenu
 676                 var menu:Menu = Menu(event.target.popUp);
 677                 var enable:Boolean = false;
 678                 if (selectedEntity != null && selectedEntity is EntityCollection) {
 679                         // Enable only if some entities aren't a member of the relation
 680                         enable=!rowData.universal;
 681                 }
 682                 if (enable==menu.dataProvider[2].enabled) return;
 683                 menu.dataProvider[2].enabled=enable;
 684                 menu.invalidateList();
 685         }
 686
 687         /** Do the action selected in the relation actions menu */
 688
 689         public function selectRelationMenu(event:MenuEvent):void {
 690                 var rel:Relation=rowData.relation;
 691                 var entities:Array;
 692                 var controller:EditController=Application.application.theController;
 693                 switch (event.index) {
 694                         case 0: // Select all members
 695                                 entities=selectedEntity.entities.concat(rel.memberEntities);
 696                                 entities=entities.filter(function(e:*, i:int, arr:Array):Boolean { return arr.indexOf(e) == i } );      // remove duplicates
 697                                 // ** FIXME: This is a really horrible way of changing the controller state
 698                                 controller.setState(controller.findStateForSelection(entities));
 699                                 break;
 700
 701                         case 1: // Deselect all members
 702                                 entities=selectedEntity.entities;
 703                                 entities=entities.filter(function(e:*, i:int, arr:Array):Boolean { return !e.hasParent(rel) } );
 704                                 controller.setState(controller.findStateForSelection(entities));
 705                                 break;
 706
 707                         case 2: // Add selection to this relation
 708                                 var undo:CompositeUndoableAction=new CompositeUndoableAction("Remove selection from relations");
 709                                 for each (var entity:Entity in selectedEntity.entities) {
 710                                         if (!entity.hasParent(rel)) {
 711                                                 rel.appendMember(new RelationMember(entity,''), undo.push);
 712                                         }
 713                                 }
 714                                 MainUndoStack.getGlobalStack().addAction(undo);
 715                                 break;
 716
 717                         case 3: // Delete relation
 718                                 Alert.show("Do you really want to delete the relation?","Are you sure?",Alert.YES | Alert.CANCEL,null,
 719                                         function(event:CloseEvent):void {
 720                                                 if (event.detail==Alert.CANCEL) return;
 721                                                 rel.remove(MainUndoStack.getGlobalStack().addAction);
 722                                         } );
 723                                 break;
 724                 }
 725         }
 726
 727       private function tagChanged(event:TagEvent):void {
 728           refreshFeatureIcon();
 729       }
 730
 731       public function loadFeatures():void {
 732           mapFeatures = MapFeatures.getInstance();
 733           stack.removeChild(membersVBox); // remove by default, will be added if relation
 734       }
 735
 736       /** Open up a new browser page, showing the help page as defined in Map Features XML file .*/
 737       public function openDescription():void {
 738           if ( feature != null && feature.hasHelpURL() )
 739               navigateToURL(new URLRequest(feature.helpURL), "potlatch_help");
 740       }
 741
 742       /** Open up a new browser page showing OSM's view of the current entity. */
 743       public function openEntityPage():void {
 744           if (selectedEntity != null && selectedEntity.id >= 0) {
 745               // This is slightly hard-coded, but not drastically. The ../s could be changed for string manipulation of the apiBase
 746               var urlBase:String = connection.apiBase + '../../browse/'
 747               navigateToURL(new URLRequest(urlBase+selectedEntity.getType()+'/'+selectedEntity.id), "potlatch_browse");
 748           }
 749       }
 750
 751       public function addToRelation():void {
 752           new RelationSelectPanel().init(selectedEntity,new Object());
 753       }
 754
 755       private function removeFromRelation(id:Number, index:int=-1):void {
 756                 var rel:Relation=connection.getRelation(id);
 757                 if (index>-1) {
 758                         rel.removeMemberByIndex(index, MainUndoStack.getGlobalStack().addAction);
 759                 } else if (selectedEntity is EntityCollection) {
 760                         var undo:CompositeUndoableAction=new CompositeUndoableAction("Remove selection from relations");
 761                         for each (var e:Entity in EntityCollection(selectedEntity).entities) rel.removeMember(e,undo.push);
 762                         MainUndoStack.getGlobalStack().addAction(undo);
 763                 }
 764       }
 765
 766       public function changeFeatureType(event:Event):void {
 767           if ( selectedEntity == null )
 768               return;
 769
 770           UIComponent.suspendBackgroundProcessing();
 771           var newFeature:Feature = currentCategorySelector.selectedType;
 772           var undoStack:Function = MainUndoStack.getGlobalStack().addAction;
 773           var action:CompositeUndoableAction = new CompositeUndoableAction(
 774                   "Set "+selectedEntity.getType()+" "+selectedEntity.id+" to "+newFeature.name);
 775                   selectedEntity.suspend();
 776
 777           // remove tags from the current feature
 778           if ( feature != null ) {
 779               for each( var oldtag:Object in feature.tags ) {
 780                   selectedEntity.setTag(oldtag["k"], null, action.push);
 781               }
 782           }
 783
 784           // set tags for new feature
 785           if ( newFeature != null ) {
 786               for each( var newtag:Object in newFeature.tags ) {
 787                   selectedEntity.setTag(newtag["k"], newtag["v"], action.push);
 788               }
 789           }
 790
 791                   selectedEntity.resume();
 792           undoStack(action);
 793           popupChange.close();
 794           initialiseEditors();
 795           UIComponent.resumeBackgroundProcessing();
 796       }
 797
 798         private function resizePOIGrid(event:Event):void {
 799                 var rows:Number=event.target.dataProvider.length/event.target.columnCount;
 800                 if (rows!=Math.floor(rows)) { rows=Math.floor(rows+1); }
 801                 event.target.height=rows*(event.target.rowHeight+1);
 802         }
 803   ]]></mx:Script>
 804 </mx:VBox>
 805