FLEX gumbo实例：检测FxTextArea控件滚动条的位置.

你首先需要学会在FLEX BUILDER3中编写，编译gumbo的方法： 这里有教程：http://www.cnblogs.com/xxcainiao/archive/2008/11/24/1339865.html

FLEX gumbo实例--检测FxTextArea控件滚动条的位置.

 

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/12/09/determining-the-current-scroll-position-on-an-fxtextarea-control-in-flex-gumbo/  -->
< Application  name ="FxTextArea_scroller_test"
        xmlns ="http://ns.adobe.com/mxml/2009"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < Script >
         <![CDATA[
            import mx.components.FxVScrollBar;

            private function init():void {
                var vsb:FxVScrollBar = textArea.scroller.verticalScrollBar;
                var min:Number = vsb.minimum;
                var val:Number = vsb.value;
                var max:Number = vsb.maximum;
                lbl1.text = min.toString();
                lbl2.text = val.toString();
                lbl3.text = max.toString();
                progressBar.setProgress(val, max);
            }
         ]]>
     </ Script >

     < ApplicationControlBar  dock ="true" >
         < Form  styleName ="plain" >
             < FormItem  label ="minimum:" >
                 < Label  id ="lbl1"   />
             </ FormItem >
             < FormItem  label ="value:" >
                 < Label  id ="lbl2"   />
             </ FormItem >
             < FormItem  label ="maximum:" >
                 < Label  id ="lbl3"   />
             </ FormItem >
             < FormItem >
                 < ProgressBar  id ="progressBar"
                        mode ="manual"
                        label ="%1 / %2 (%3%%)"   />
             </ FormItem >
         </ Form >
     </ ApplicationControlBar >

     < FxTextArea  id ="textArea"
            width ="100%"
            height ="100%"
            enterFrame ="init();" >
         < content >
             < String  source ="data/lorem.html"   />
         </ content >
     </ FxTextArea >

</ Application >

 

 

来自：http://blog.flexexamples.com/2008/12/09/determining-the-current-scroll-position-on-an-fxtextarea-control-in-flex-gumbo/

转载于:https://www.cnblogs.com/xxcainiao/archive/2008/12/24/1361520.html