The move effect doesn't occur because I'm an idiot. It was supposed to be on the children. For some reason I thought canvas applied moveEffect to its children.
The other questions though I'd still like to know. --- In flexcoders@yahoogroups.com, Wesley Acheson <wesley.ache...@...> wrote: > > HI, > > I've got an application I'm trying to implement a custom layout. I'm trying > to get move and resize effects to work on the children but it doesn't seem > to work. Have I missed something obvious? > > Also... > > When I'm extending Canvas am I changing the correct method to recalculate > the size and position of the children. > > Should this ignore canvas and instead extend Container? > > Please note that this is a WIP. > > Would anyone like me to post the completed version when its done? > > *Application.mxml* > <?xml version="1.0" encoding="utf-8"?> > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="absolute" > xmlns:icarus="com.icarus.*"> > <mx:Script> > <![CDATA[ > private function > widgetAddButtonClickHandler(event:MouseEvent):void > { > widgetContainer.addChildAt(new Panel(),0); > } > > private function > widgetRemoveButtonClickHandler(event:MouseEvent):void > { > widgetContainer.removeChildAt(0); > } > ]]> > </mx:Script> > <icarus:WidgetContainer right="10" left="10" bottom="10" > id="widgetContainer" top="51" borderStyle="solid" borderThickness="1" > borderColor="#585A5C" backgroundColor="#CCDCEA"> > <icarus:moveEffect> > <mx:Parallel> > <mx:Move duration="250" /> > <mx:Resize duration="250" /> > </mx:Parallel> > </icarus:moveEffect> > <mx:Panel move="trace('moved')" x="5"/> > </icarus:WidgetContainer> > <mx:ApplicationControlBar top="10" left="10" right="10" height="33"> > <mx:Button label="Add Item" id="widgetAddButton" > click="widgetAddButtonClickHandler(event)"/> > <mx:Button label="Remove Item" id="widgetRemoveButton" > click="widgetRemoveButtonClickHandler(event)" /> > </mx:ApplicationControlBar> > </mx:Application> > > *WidgetContainer.as* > package com.icarus > { > import mx.containers.Canvas; > import mx.core.UIComponent; > > public class WidgetContainer extends Canvas > { > private var positions:Array; > > public var numCols:int = 3; > private var paddingLeft:int = 10; > private var paddingRight:int = 10; > private var paddingTop:int = 10; > private var paddingBottom:int = 10; > private var itemSpacing:int =10; > private var itemMinHeight:int = 200; > > public function WidgetContainer() > { > super(); > } > > private function calculatePositions(width:int, height:int):void > { > var children:Array = getChildren(); > var numChildren:int = children.length; > var availableHeight:int = height - (paddingTop + paddingBottom); > availableHeight = availableHeight - (viewMetrics.bottom + > viewMetrics.top); > var availableWidth:int = width; - (paddingLeft + paddingRight); > availableWidth = availableWidth - (viewMetrics.top + > viewMetrics.bottom); > availableWidth = availableWidth - ((verticalScrollBar === > null)?0:verticalScrollBar.width) > var numFirstRowChildren:int = (numChildren -1) % numCols +1; > > var numRows:int = Math.ceil(numChildren / numCols); > var rowHeight:int = availableHeight -(paddingTop > +paddingBottom); > var firstRowWidth:int = availableWidth - ((numFirstRowChildren > -1) * itemSpacing); > firstRowWidth = firstRowWidth / numFirstRowChildren; > var otherRowWidth:int = availableWidth - ((numCols-1) * > itemSpacing); > otherRowWidth = otherRowWidth /numCols; > rowHeight = availableHeight - ((numRows-1) * itemSpacing); > rowHeight = Math.max(rowHeight / numRows, itemMinHeight); > positions = new Array(); > for (var i:int=0; i<numChildren; i++) > { > positions[i] = new Position(); > //Height always remains the same. > positions[i].height = rowHeight; > > //First Row > if (i<numFirstRowChildren) > { > positions[i].y = paddingTop; > positions[i].width = firstRowWidth; > } else { > //final item of previous row; > var previousRowFinalItem:int = i - > ((i-numFirstRowChildren) % numCols) - 1; > positions[i].y = positions[previousRowFinalItem].y + > positions[previousRowFinalItem].height + itemSpacing; > positions[i].width = otherRowWidth; > } > //First Column > if (i == 0 || (i-numFirstRowChildren) % numCols == 0) > { > positions[i].x = paddingLeft; > } else { > //Subsequent columns. > positions[i].x = positions[i-1].x + positions[i-1].width > + itemSpacing; > } > } > } > > override protected function updateDisplayList(unscaledWidth:Number, > unscaledHeight:Number):void > { > calculatePositions(unscaledWidth, unscaledHeight); > var children:Array = getChildren(); > for (var i:int = 0; i < children.length; i++) > { > var child:UIComponent = UIComponent(children[i]); > child.move(positions[i].x, positions[i].y); > children[i].width = positions[i].width; > children[i].height = positions[i].height; > } > super.updateDisplayList(unscaledWidth, unscaledHeight); > } > > > > } > } > > class Position > { > public var x:int; > public var y:int; > public var height:int; > public var width:int; > } > > Regards, > Wes >
