Flex SearchInput扩展
SearchInput扩展TextInput
增加:
imageSource属性（右侧图片）;
tipText属性（为空时出现的提示文字）;
buttonClick事件(点击button及input中敲击回车触发)。
多说无益，上代码
package {import flash.events.Event;import flash.events.FocusEvent;import flash.events.KeyboardEvent;import flash.events.MouseEvent;import flash.ui.Keyboard;import mx.controls.Alert;import mx.controls.Button;import mx.controls.Image;import mx.controls.TextInput;import mx.events.FlexEvent;[Event(name="buttonClick", type="flash.events.Event")]public class SearchInput extends TextInput { protected var buttonImage:Button; private var _imageHeight:int; private var _imageWidth:int; private var _isUseTip:Boolean = false; private var _tipText:String = ""; private var _tipStyle:String = "italic"; private var _tipColor:String = "#766767"; [Bindable] [Embed(source="assets/icoSearch.png")] private var _imageSource:Class; public function SearchInput() { super(); this.setStyle("borderColor", "#66B3FF"); this.addEventListener(FlexEvent.CREATION_COMPLETE, addButton); this.addEventListener(KeyboardEvent.KEY_DOWN, KeyEnter); } override protected function createChildren():void { super.createChildren(); this._isUseTip = this._tipText != ""; if (_isUseTip) { setTip(); this.addEventListener(FocusEvent.FOCUS_IN, focusTip); this.addEventListener(FocusEvent.FOCUS_OUT, focusTip); } } private function setTip():void { if (this.text == "") { this.text = _tipText; this.setStyle("fontStyle", _tipStyle); this.setStyle("color", _tipColor); } } private function clearTip():void { if (this.getStyle("fontStyle") == _tipStyle) { this.text = ""; this.setStyle("fontStyle", ""); this.setStyle("color", ""); } } private function focusTip(e:FocusEvent):void { switch (e.type) { case FocusEvent.FOCUS_IN : return clearTip(); case FocusEvent.FOCUS_OUT : return setTip(); } } private function addButton(event:FlexEvent):void { buttonImage = new Button(); buttonImage.setStyle("skin", _imageSource); buttonImage.height = imageHeight; buttonImage.width = imageWidth; buttonImage.useHandCursor = true; buttonImage.move(this.width - buttonImage.width - (this.height - buttonImage.height) / 2, (this.height - buttonImage.height) / 2); buttonImage.addEventListener(MouseEvent.CLICK, buttonClick); this.addChild(buttonImage); } private function KeyEnter(event:KeyboardEvent):void { if (event.charCode != Keyboard.ENTER) return; this.dispatchEvent(new Event("buttonClick")); } private function buttonClick(event:MouseEvent):void { this.dispatchEvent(new Event("buttonClick")); } public function get imageHeight():int { if (_imageHeight == 0) _imageHeight = this.height; return _imageHeight; } public function set imageHeight(value:int):void { _imageHeight = value; } public function get imageWidth():int { if (_imageWidth == 0) _imageWidth = this.height; return _imageWidth; } public function set imageWidth(value:int):void { _imageWidth = value; } public function get imageSource():Class { return _imageSource; } public function set imageSource(value:Class):void { _imageSource = value; } public function get tipText():String { return _tipText; } public function set tipText(value:String):void { _tipText = value; }}}