» 文本框

以前写过一个数值文本NumberText,也就是只允许输入数值,而其他文本不允许被输入.NumberText当时是根据判断键盘事件来控制输入的,感觉有点傻,后来知道了TextField本身就有属性来限制输入的字符,就一直想重写下这个数值文本.今天终于有空重新写了个新的数值文本:NumTextField. 文本框其实本身就有TextField.restrict这个属性来限制输入的字符的,所以侦听键盘事件去过滤文本有点多余了.所以今天就重写了NumberText类. 示例 不能看到示例的请到原文看吧 代码 /** * NumTextField 继承于 TextField * * 禁用的 属性 和方法 * override public function set multiline(value:Boolean):void { } * override public function set type(value:String):void { } * override public function set text(value:String):void { } * override public function set htmlText(value:String):void { } * override public function appendText(newText:String):void { } * * 增加的属性 * number 可读写 NumberText 的值 */ package com.litefeel.controls { import flash.events.Event; import flash.events.TextEvent; import flash.text.TextField; /** * www.litefeel.com * lite3@qq.com * @author lite3 */ public class NumTextField extends TextField { private var num:Number 0; private var ignoreChange:Boolean false; public function NumTextField() { super.restrict '.0-9'; super.maxChars 17; super.type "input"; super.text getNumStr(); super.height super.textHeight + 4; super.wordWrap false; super.multiline false; super.border true; super.addEventListener(Event.CHANGE, changeHandler); } /** * NumTextField的值 可读写 */ public function get number():Number { return num; } public function set number(value:Number):void { if (isNaN(value) || value < 0) value 0; num value; super.text getNumStr(); } // 禁用的方法及函数 override public function set multiline(value:Boolean):void { } override public function set type(value:String):void { } override public function set text(value:String):void { } override public function set htmlText(value:String):void { } override public function appendText(newText:String):void { } private function getNumStr():String { var s:String num + ""; if ( -1 s.indexOf(".")) s + "."; return s; } private function changeHandler(e:Event):void { if (ignoreChange) return; var old:Number num; number parseFloat(text); super.text getNumStr(); if (old num) return; if (old 1 && selectionBeginIndex selectionEndIndex && text.charAt(selectionBeginIndex-1) ".") { setSelection(1, 1); } ignoreChange true; dispatchEvent(new Event(Event.CHANGE)); ignoreChange false; } } }

LiteFeel

重写NumberText为NumTextField

NumberText