6.3.2 放缩效果和调整大小效果
Zoom 放缩效果 对对象进行放大或者缩小操作,是通过改变对象的水平比例scaleX 和垂直比例scaleY 来实现的。
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Style source="style.css" /> <mx:Script> <![CDATA[ import mx.effects.Zoom; internal function zoomCanvas():void{ var newZoom:Zoom = new Zoom(); newZoom.zoomHeightFrom =0.01; newZoom.zoomWidthFrom = 0.01; newZoom.originX = 0; newZoom.originY = 0; newZoom.target = Canvas_1; newZoom.duration = 2000; newZoom.play(); } ]]> </mx:Script> <mx:Canvas id="Canvas_1" styleName="box" x="48" y="40" width="200" height="200" > <mx:Text x="15" y="37" text="文本,请注意放大过程中文本的变化" width="166" height="82"/> </mx:Canvas> <mx:Button x="48" y="277" label="放大" click="zoomCanvas()"/> </mx:Application>
始末位置的长宽比例 :zoomWidthFrom、zoomWidthTo、zoomHeightFrom、zoomHeightTo 。取0-1的值。默认1
动画的参照点座标:originX 、originY。 默认以组件的中心点。
captureRollEvents:是否忽略动画过程中的鼠标移上和移出动作。
Resize 调整大小 效果和 Zoom 相比,似乎相同,其实两者区别很大。Resize 是重新确定对象的长宽属性。会影响子元素。
始末位置的长宽:widthFrom、widthTo、heightFrom、heightTo
长宽的增量: widthBy、heightBy
如果指定了widthTo 则会忽略widthBy。没有指定widthBy,则默认为当前的宽度。
hideChildreTargets:针对Panel组件,用来隐藏Panel组件的子级元素,同时临时关闭Panel组件的自动调整功能,直到动画结束后再重新恢复。这样可以提搞性能。
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Style source="style.css" /> <mx:Script> <![CDATA[ import mx.effects.Resize; import mx.events.TweenEvent; //鼠标动作 internal function resizeCanvas():void{ //创建新的Resize对象 var newResize:Resize = new Resize(); //设定高度和宽度的起始值 newResize.heightFrom = 200; newResize.widthFrom = 200; //高度的最终值 newResize.heightTo = 240; //宽度增加40相当于 widthTo = 240 newResize.widthBy = 40; //指定要隐藏内部元素的Panel newResize.hideChildrenTargets = [Panel_1,Panel_2]; newResize.target = Canvas_1; newResize.duration = 2000; //监听动画的结束事件 newResize.addEventListener(TweenEvent.TWEEN_END,EndHandler); Canvas_1.autoLayout = false; //注释掉这一句代码然后运行程序,观察差别 newResize.play(); } internal function EndHandler(evt:TweenEvent):void{ Canvas_1.autoLayout = true; } ]]> </mx:Script> <mx:Canvas id="Canvas_1" styleName="box" x="26" y="40" width="200" height="200" > <mx:Text x="10" y="10" text="说明:调整大小效果" width="166" height="26"/> <mx:Panel id="Panel_1" styleName="imgPanel" x="10" y="33" width="80%" height="80%" layout="absolute" title="面板一"> <mx:Image x="0" y="0" source="tree.jpg"/> </mx:Panel> </mx:Canvas> <mx:Button x="26" y="293" label="放大" click="resizeCanvas()"/> <mx:Panel id="Panel_2" styleName="imgPanel" x="279" y="40" width="134" height="129" layout="absolute" title="面板二"> <mx:Image x="0" y="0" source="tree.jpg"/> </mx:Panel> </mx:Application>