Flex仿Ext的遮罩工具类
package util {import flash.text.TextFieldAutoSize;import flash.utils.Dictionary;import flash.utils.getQualifiedClassName;import mx.binding.utils.BindingUtils;import mx.containers.Panel;import mx.core.UIComponent;import mx.core.UITextField;import mx.core.mx_internal;use namespace mx_internal;/** * 遮罩工具类。 * 非Flex里面的mask概念，而是仿Ext的一层半透明控件 * @author simon.fish */public class MaskUtil {/** * 存储已经建立遮罩的容器。 * 主要是去掉遮罩使用 * @default */private static const cache:Dictionary = new Dictionary(true);/** * */public function MaskUtil() {//TODO: implement function}/** * 建立遮罩 * @param container * @return */public static function mask(container:UIComponent,text:String=null):Boolean{//先从缓存里面取遮罩 IUITextField(createInFontContext(UITextField))var mask:UIComponent = cache[container] as UIComponent;//如果取不出来，还未建立过遮罩if(mask == null){mask = new UIComponent();mask.tabEnabled = false;mask.alpha = 0.4;//Alert的背景色//mask.graphics.beginFill(14540252,100);mask.graphics.beginFill(0xADA2A2);//对于像Panel这样有title的特殊处理，以处理错位if(container is Panel){//得到标题栏高度，getHeaderHeightProxy为mx_internal.已经getHeaderHeightProxy需要3.2以上var hh:Number = Panel(container).getHeaderHeightProxy()+1;//left bordervar lb:Number = container.getStyle("borderThicknessLeft");mask.graphics.drawRect(0-lb, 0-hh, container.width, container.height);}else{mask.graphics.drawRect(0, 0, container.width, container.height);}//加文字if(text != null ){var textField:UITextField = createTextField(container);textField.text = text;// " Loading... ";mask.addChild(textField);}container.addChild(mask);cache[container] = mask;}else{//如果已经建立过遮罩，直接设成可见mask.visible = true;}return true;}/** * 建立加载的遮罩 * @param container * @return */public static function loadMask(container:UIComponent):Boolean{return mask(container," Loading... ");}/** * 取消遮罩 * @param container * @return */public static function unmask(container:UIComponent):void{//先从缓存里面取遮罩var mask:UIComponent = cache[container] as UIComponent;//只处理建立过遮罩if(mask != null){//如果已经建立过遮罩，直接设成不可见mask.visible = false;}}/** * 创建中间的文字。 * @param container * @return * */private static function createTextField(container:UIComponent):UITextField {var className:String = getQualifiedClassName(UITextField);var text = container.moduleFactory.create(className) as UITextField;text.tabEnabled = false;text.alpha = 0.4;text.background = true;text.borderColor = 0x31A5EA;text.border = true;//BindingUtils.bindProperty(text.thickness = 1;text.selectable = true;text.autoSize = TextFieldAutoSize.CENTER;//text.backgroundColor = 0x06A0ED;BindingUtils.bindProperty(text,"x",container,{name:"width",getter: function(host) { return (host.width-text.width)/2; } });//(container.width - text.width) / 2);BindingUtils.bindProperty(text,"y",container,{name:"height",getter: function(host) { return (host.height-text.height)/2; } });//BindingUtils.bindProperty(text,"y",container,(container.height - text.height) / 2);//text.x = (container.width - text.width) / 2;//text.y = (container.height - text.height) / 2;return text;}}}?? 仿Ext风格的遮罩工具类。
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