Hi Lilo, you should extends the Class ContainerController and overide the addSelectionContainer() and some other
related method. And here is a sample, thanks!
package{
import flash.display.DisplayObject;
import flash.display.DisplayObjectContainer;
import flash.display.Sprite;
import flash.filters.*;
import flash.display.Shape;
import flash.display.BlendMode;
import flashx.textLayout.container.ContainerController;
import flashx.textLayout.edit.ISelectionManager;
import flashx.textLayout.edit.SelectionManager;
import flashx.textLayout.elements.ParagraphElement;
import flashx.textLayout.elements.SpanElement;
import flashx.textLayout.elements.TextFlow;
public class ShadowFilter extends Sprite
{
private var _textLineContainer:Sprite;
public function ShadowFilter()
{
var textFlow:TextFlow = new TextFlow();
var span:SpanElement = new SpanElement();
var paragraph:ParagraphElement = new ParagraphElement();
span.text = "I am shadow filtered";
paragraph.addChild(span);
textFlow.addChild(paragraph);
textFlow.fontSize = "32";
textFlow.paddingLeft = "150";
textFlow.paddingTop = "100";
var filterSprite:Sprite = new Sprite();
var containerController:CustomContainerController = new CustomContainerController(this, 500, 300);
filterSprite.x = 20;
filterSprite.y = 20;
textFlow.interactionManager = new SelectionManager();
var selectManager:ISelectionManager = textFlow.interactionManager;
textFlow.flowComposer.addController(containerController);
textFlow.flowComposer.updateAllControllers();
}
}
}
import flash.display.BlendMode;
import flash.display.DisplayObject;
import flash.display.DisplayObjectContainer;
import flash.display.Shape;
import flash.display.Sprite;
import flash.filters.*;
import flash.text.engine.TextLine;
import flashx.textLayout.container.ContainerController;
import flashx.textLayout.tlf_internal;
class CustomContainerController extends ContainerController
{
public function CustomContainerController(container:Sprite,compositionWidth:Number=100,compositionHeight:Number=100)
{
super(container,compositionWidth,compositionHeight);
// We'll put all text lines in a nested container
// Filters applied to this container won't affect other objects like selection or background shapes
_textLineContainer = new Sprite();
//_textLineContainer.filters = [ new DropShadowFilter() ]; // apply a filter (for illustration)
container.addChild(_textLineContainer);
}
// Return the index where the first text line should appear in its parent
// Since our _textLineContainer only holds text lines, return zero
protected override function getFirstTextLineChildIndex():int
{
return 0;
}
// Add a text line at the specified index
protected override function addTextLine(textLine:TextLine, index:int):void
{
if(index == 0)
// textLine.filters = [ new BlurFilter(3, 3, BitmapFilterQuality.HIGH) ];
textLine.filters = [ new DropShadowFilter() ];
_textLineContainer.addChildAt(textLine, index);
}
protected override function addInlineGraphicElement(parent:DisplayObjectContainer, inlineGraphicElement:DisplayObject, index:int):void
{
parent.addChildAt(inlineGraphicElement, index);
}
// Remove a text line, but only if it is in _textLineContainer
// (A text line may have moved to another container because of 'shuffling')
protected override function removeTextLine(textLine:TextLine):void
{
if (_textLineContainer.contains(textLine))
{
textLine.filters = null;
_textLineContainer.removeChild(textLine);
}
}
// Add the container for selection shapes (block or point selection)
protected override function addSelectionContainer(selectionContainer:DisplayObjectContainer):void
{
// If selection container is opaque or has normal blend mode, put selection container behind the text lines, else in front
var filter:BlurFilter = new BlurFilter(10, 10, BitmapFilterQuality.HIGH);
var myFilters:Array = new Array();
myFilters.push(filter);
selectionContainer.filters = myFilters;
var index:int = selectionContainer.blendMode == BlendMode.NORMAL && selectionContainer.alpha == 1 ? container.getChildIndex(_textLineContainer) : container.numChildren;
container.addChildAt(selectionContainer, index);
}
// Remove the container for selection shapes
protected override function removeSelectionContainer(selectionContainer:DisplayObjectContainer):void
{
container.removeChild(selectionContainer);
}
// Add the background shape
protected override function addBackgroundShape(shape:Shape):void
{
container.addChildAt(shape, 0); // behind everything else, so use index 0
}
private var _textLineContainer:Sprite;
}
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