Flex4中的皮肤（4）
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Flex4中的皮肤（4）：使用SkinPart约束Skin 收藏 在SkinnableComponent中，可以声明SkinPart元标签对Skin进行约束，同时在组件中提供对Skin元素的引用： ? view plaincopy to clipboardprint? [SkinPart(required="false")]??????? ??? public var labelElement:SimpleText;? [SkinPart(required="false")]???????????? public var labelElement:SimpleText; ? 如果声明了SkinPart并且required="true"，则Skin中必须包含该类型灯元素并且具有相同的id： ? <s:SimpleText id="labelElement" .../> ? SkinnableComponent中还提供了partAdded和partRemoved方法： ? view plaincopy to clipboardprint? //--------------------------------------------------------------------------?? ??? //?? ??? //? Methods - Parts?? ??? //?? ??? //--------------------------------------------------------------------------?? ?????? ??? /**? ???? *? Called when a skin part is added.?? ???? *? You do not call this method directly.?? ???? *? For static parts,Flex calls it automatically when it calls the <code>attachSkin()</code> method.?? ???? *? For dynamic parts,Flex calls it automatically when it calls?? ???? *? the <code>createDynamicPartInstance()</code> method.?? ???? *? ???? *? <p>Override this function to attach behavior to the part.?? ???? *? If you want to override behavior on a skin part that is inherited from a base class,?? ???? *? make sure that you do not call the <code>super.partAdded()</code> method.?? ???? *? Otherwise,you should always call the <code>super.partAdded()</code> method.</p>? ???? *? ???? *? @param partname The name of the part.? ???? *? ?? ??*? @param instance The part.? ???? *??? ???? *? @langversion 3.0? ???? *? @playerversion Flash 10? ???? *? @playerversion AIR 1.5? ???? *? @productversion Flex 4? ???? */? ??? protected function partAdded(partName:String,instance:Object):void? ??? {????? ??? }?? ??? /**? ???? *? Called when an instance of a skin part is being removed.?? ???? *? You do not call this method directly.?? ???? *? For static parts,Flex calls it automatically when it calls the <code>detachSkin()</code> method.?? ???? *? For dynamic parts,Flex calls it automatically when it calls?? ???? *? the <code>removeDynamicPartInstance()</code> method.?? ???? *? ???? *? <p>Override this function to remove behavior from the part.</p>? ???? *? ???? *? @param partname The name of the part.? ???? *? ???? *? @param instance The part.? ???? *??? ???? *? @langversion 3.0? ???? *? @playerversion Flash 10? ???? *? @playerversion AIR 1.5? ???? *? @productversion Flex 4? ???? */? ??? protected function partRemoved(partName:String,instance:Object):void? ??? {????????? ??? }?? ????? //-------------------------------------------------------------------------- ??? // ??? //? Methods - Parts ??? // ??? //-------------------------------------------------------------------------- ??? ??? /** ???? *? Called when a skin part is added. ???? *? You do not call this method directly. ???? *? For static parts,Flex calls it automatically when it calls the <code>attachSkin()</code> method. ???? *? For dynamic parts,Flex calls it automatically when it calls ???? *? the <code>createDynamicPartInstance()</code> method. ???? * ???? *? <p>Override this function to attach behavior to the part. ???? *? If you want to override behavior on a skin part that is inherited from a base class, ???? *? make sure that you do not call the <code>super.partAdded()</code> method. ???? *? Otherwise,you should always call the <code>super.partAdded()</code> method.</p> ???? * ???? *? @param partname The name of the part. ???? * ???? *? @param instance The part. ???? *? ???? *? @langversion 3.0 ???? *? @playerversion Flash 10 ???? *? @playerversion AIR 1.5 ???? *? @productversion Flex 4 ???? */ ??? protected function partAdded(partName:String,instance:Object):void ??? {?? ??? } ??? /** ???? *? Called when an instance of a skin part is being removed. ???? *? You do not call this method directly. ???? *? For static parts,Flex calls it automatically when it calls the <code>detachSkin()</code> method. ???? *? For dynamic parts,Flex calls it automatically when it calls ???? *? the <code>removeDynamicPartInstance()</code> method. ???? * ???? *? <p>Override this function to remove behavior from the part.</p> ? ???* ???? *? @param partname The name of the part. ???? * ???? *? @param instance The part. ???? *? ???? *? @langversion 3.0 ???? *? @playerversion Flash 10 ???? *? @playerversion AIR 1.5 ???? *? @productversion Flex 4 ???? */ ??? protected function partRemoved(partName:String,instance:Object):void ??? {?????? ??? } ???? ? 在增加或删除SkinPart时会调用这些方法。 ? 通过重写这些方法可以对SkinPart进行额外的操作，比如增加SkinPart时为其添加事件监听： ? view plaincopy to clipboardprint? override protected function partAdded(partName:String,instance:Object) : void? {?? ?????? super.partAdded(partName,instance);?? ?????? if (instance == labelElement)?? ?????????? labelElement.addEventListener(...);?? }? ? ? ? 本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/ThinkInside/archive/2009/10/06/4635138.aspx （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |