<?xml version="1.0" encoding="utf-8"?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<mx:ViewStack xmlns:mx="http://www.adobe.com/2006/mxml" resize="resizeContainers()" backgroundColor="0xffffff">
	<mx:Script>
		<![CDATA[
			import flashx.textLayout.container.ContainerController;
			import flashx.textLayout.debug.assert;
			import flashx.textLayout.elements.Configuration;
			import flashx.textLayout.elements.TextFlow;
			import flashx.textLayout.formats.BlockProgression;
			
			import mx.containers.Canvas;
			
			import textEditBar.SpriteWithIME;
			
			private var _numContainers:int = -1;
			private var _arrangement:String = null;
			private var _visibleContainer:int = -1;
			private var _textPanelOffset:int = 0;
			private var _activeFlow:TextFlow = null;
			
			public var measureWidth:Boolean = false;
			public var measureHeight:Boolean = false;
			
			public function get numContainers():int { return _numContainers; }
			public function get visibleContainer():int { return _visibleContainer; }
			public function get arrangement():String { return _arrangement; }
			
	 		public function changeContainerSetup(newActiveFlow:TextFlow, newArrangement:String,newVisibleContainer:int,newContainerChainLength:int):void
	 		{
	 			var needResize:Boolean = false;
	 			
	 			 if (newContainerChainLength <= 0)
	 				newContainerChainLength = 1;
	 			
	 			if (newVisibleContainer > newContainerChainLength)
			 		newVisibleContainer = newContainerChainLength;
			 	if (newVisibleContainer <= 0)
			 		newVisibleContainer = 1;	
			 	if (newArrangement == null)
			 		newArrangement = MultiContainerChangeEvent.ARRANGE_SIDE_BY_SIDE;
			 		
			 	if (_activeFlow != newActiveFlow || _numContainers != newContainerChainLength || newArrangement != _arrangement)
			 	{
	 				_activeFlow = newActiveFlow;
			 		if (_activeFlow)
			 			_activeFlow.flowComposer.removeAllControllers();
	  				removeAllChildren();
	 				addPanels(newContainerChainLength, newArrangement);
	 				_textPanelOffset = 0;
	 				_visibleContainer = newVisibleContainer;
	 				selectedIndex = _arrangement == MultiContainerChangeEvent.ARRANGE_SIDE_BY_SIDE ? _textPanelOffset : (_textPanelOffset + _visibleContainer-1);
	 				needResize = true;
	 				_arrangement = newArrangement;
	 				_numContainers = newContainerChainLength;
			 	
			 		if (_activeFlow)
	 				{
						for (var idx:int = 0; idx < _numContainers; idx++)
						{
							var newController:ContainerController = containerFactoryFunction();
							var panel:Canvas = getChildAt(_arrangement == MultiContainerChangeEvent.ARRANGE_SIDE_BY_SIDE ? 0 : idx) as Canvas;
							panel.rawChildren.addChild(newController.container);		
							_activeFlow.flowComposer.addController(newController);
						}
						needResize = true;
			 		}
			 	}
	
			 		
			 	if (newVisibleContainer != _visibleContainer)
			 	{
			 		if (_arrangement == MultiContainerChangeEvent.ARRANGE_AS_VIEWSTACK)
			 		{
			 			selectedIndex =  _textPanelOffset + newVisibleContainer - 1;
			 			_visibleContainer = newVisibleContainer;
			 		}
			 	}
			 	
			 	if (needResize && _activeFlow)
			 		resizeContainers();
	  		}
	 		
	 		public function containerFactoryFunction(frameName:String=null):ContainerController
	 		{
				var config:Configuration = TextFlow.defaultConfiguration;
	 			var controllerClass:Class = ContainerController;
	 			
				//var textContainer:DisplayObjectContainer = new Sprite();
				var textContainer:DisplayObjectContainer = new SpriteWithIME();
				textContainer.focusRect = false;
	
				return new controllerClass(textContainer);
	 		}
 		
			public function resizeContainers():void
			{
				var newFrameWidth:Number = width;
				var newFrameHeight:Number = height;
				
				// for now lots of skinny frames - later can tile them or something fun
				var divFrameWidth:int;
				var divFrameHeight:int;
				
				var deltax:int;
				var deltay:int;
	      
	      		if (_arrangement == MultiContainerChangeEvent.ARRANGE_SIDE_BY_SIDE)
	      		{
					if (_activeFlow && _activeFlow.computedFormat.blockProgression!= BlockProgression.RL)
					{
						divFrameWidth = newFrameWidth/_numContainers;
						divFrameHeight = newFrameHeight;
					} 
					else {
						divFrameWidth = newFrameWidth;
						divFrameHeight = newFrameHeight/_numContainers;
					}
					deltax = divFrameWidth;
					deltay = divFrameHeight;
	      		}
	      		else
	      		{
	      			divFrameWidth = newFrameWidth;
	      			divFrameHeight = newFrameHeight;
	      			deltax = 0;
	      			deltay = 0;
	      		}
	
				var x:Number = 0;
				var y:Number = 0;
				
				if (_activeFlow && _activeFlow.flowComposer)
				{
					for (var idx:int = 0; idx < _activeFlow.flowComposer.numControllers; idx++)
					{
						var cont:ContainerController = _activeFlow.flowComposer.getControllerAt(idx);
						if (cont.container is DisplayObject)
							updateFrameDimensions(cont,x,y,divFrameWidth,divFrameHeight);
						if (_activeFlow.computedFormat.blockProgression != BlockProgression.RL)
							x = x + deltax;
						else 
							y = y + deltay;
					}			
					_activeFlow.flowComposer.updateAllControllers();
					
					if (_activeFlow.interactionManager && _activeFlow.interactionManager.hasSelection())
						_activeFlow.flowComposer.getControllerAt(_activeFlow.flowComposer.numControllers-1).scrollToRange(_activeFlow.interactionManager.activePosition,_activeFlow.interactionManager.anchorPosition);	
	
				}
			}
				
	 		/** helper function to update a frame's dimensions */
	 		private function updateFrameDimensions(controller:ContainerController,x:Number,y:Number,w:Number,h:Number):void
	 		{
	 			var tc:DisplayObject = controller.container;
	 			
	   			if (tc.x != x)
	 				tc.x = x;
	 			if (tc.y != y)
	 				tc.y = y;
				controller.setCompositionSize(this.measureWidth ? NaN : w,this.measureHeight ? NaN : h);
	 		}
 		
 	 		// manage the panels based on the arrangement
	  		private function makePanel():Canvas
	  		{
	  			var rslt:Canvas = new Canvas();
	  			rslt.verticalScrollPolicy="off";
	  			rslt.horizontalScrollPolicy="off";
	  			rslt.setStyle("backgroundColor","0xffffff");
	  			rslt.width = width;
	  			rslt.height = height;
	  			return rslt;
	  		}

	  		private function addPanels(numberOfPanels:int, arrangement:String):void
	  		{
	  			if (arrangement == MultiContainerChangeEvent.ARRANGE_SIDE_BY_SIDE)
	  				addChild(makePanel());
	  			else
	  			{
	  				for (var idx:int = 0; idx < numberOfPanels; idx++)
	  					addChild(makePanel());
	  			}
	  		}
 
		]]>
	</mx:Script>
</mx:ViewStack>