Flex TextArea在光标处插入字符串

TextArea在光标处插入字符串
文章分类:Flash编程

<?xml version="1.0" encoding="utf-8"?>
<!-- @author magicianzrh         -->
<!-- @ignore www.actionscript3.cn/magicianzrh -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
  <![CDATA[
  
   [Bindable]
   private var textAreaString:String = "textAreaString";
   [Bindable]
   private var insertString:String = "|insert|";
  
   private function insertHandler():void {
    if (textArea.selectionBeginIndex == textArea.selectionEndIndex) {
     var startPart:String = textAreaString.substring(0,textArea.selectionBeginIndex);
     var endPart:String = textAreaString.substring(textArea.selectionEndIndex,textAreaString.length);
     startPart+=insertString;
     startPart+=endPart;
     textAreaString = startPart;
    }
   }
  
   private function changeInsertHandler():void {
    insertString = insertInput.text;
   }
  ]]>
</mx:Script>
<mx:TextArea id="textArea" x="10" y="21" width="298" height="158" text="{textAreaString}"/>
<mx:Button x="316" y="20" label="Insert" click="insertHandler();"/>
<mx:TextInput id="insertInput" x="316" y="50" text="{insertString}" change="changeInsertHandler();"/>
</mx:Application>