UIScrollbar组件在flash cs4中不起作用
好的，所以我有这个称为logtxt的dyanamic文本框，并且我附加了一个UIScrollbar。 它的工作原理，但只有当我通过键入/粘贴到文本框添加它。 当我通过代码添加文本时，我需要它来工作。 （它通过组件检查员正确链接）
“当我通过代码添加文本时，我需要它工作。”
您可以通过代码完成所有这些工作，例如将它放在主时间轴上;
import fl.controls.TextArea;
var myText:String = "Here is some text, notice how there will a automatigical scroll bar when needed :)";
var textarea_comp:TextArea = new TextArea();
textarea_comp.text = myText;
textarea_comp.height = 60;
addChild ( textarea_comp );
如果你想用你现有的文本框做到这一点，把它放在它所在位置上的地方。
logtxt.text = "default custom text"
我制作了影片剪辑drag_mc和track_mc，并将它们放入名为scroll_mc的影片剪辑中。 然后我有一个用于制作滚动条的类：
package {
import flash.display.Stage;
import flash.display.MovieClip;
import flash.events.*;
import flash.geom.Rectangle;
class MakeScrollBar {
private var host_mc:MovieClip;
private var call_back:Function;
private var drag_mc:MovieClip;
private var track_mc:MovieClip;
private var scroll_rect:Rectangle;
private var upper_limit:Number;
private var range:Number;
public function MakeScrollBar( _mc:MovieClip, cb:Function ) {
host_mc = _mc;
call_back = cb;
drag_mc = host_mc.drag_mc; //
drag_mc.buttonMode = true;
drag_mc.mouseChildren = false
drag_mc.addEventListener( MouseEvent.MOUSE_DOWN, press_drag );
track_mc = host_mc.track_mc;
track_mc.buttonMode = true;
track_mc.mouseChildren = false
track_mc.addEventListener( MouseEvent.CLICK, click_track );
set_limits();
}
private function press_drag( event:MouseEvent ):void {
drag_mc.stage.addEventListener( MouseEvent.MOUSE_UP, release_drag, false, 0, true );
drag_mc.startDrag( false, scroll_rect );
drag_mc.addEventListener( Event.ENTER_FRAME, drag );
}
private function release_drag( event:MouseEvent ):void {
drag_mc.removeEventListener( Event.ENTER_FRAME, drag );
drag_mc.stage.removeEventListener( MouseEvent.MOUSE_UP, release_drag );
drag_mc.stopDrag();
}
private function click_track( event:MouseEvent ):void {
trace( "Click track" );
}
private function set_limits():void {
scroll_rect = new Rectangle( track_mc.x, track_mc.y, 0, track_mc.height - drag_mc.height );
upper_limit = track_mc.y;
range = track_mc.height - drag_mc.height;
}
private function drag( event:Event ):void {
var p = ( drag_mc.y - track_mc.y ) / range;
call_back( p );
}
}
}
和一个文档类
package {
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.text.TextField;
import flash.events.MouseEvent;
public class ScrollBarAS3 extends Sprite {
public var my_scrollbar:MakeScrollBar;
public function ScrollBarAS3() {
my_scrollbar = new MakeScrollBar( scroll_mc, scroll_text );
}
public function scroll_text( n:Number ) {
scroll_txt.scrollV = Math.round( ( scroll_txt.maxScrollV - 1 ) * n ) + 1;
}
}
}
scroll_txt是文本框
从http://www.webdevils.com/2007/10/13/as3-version-of-scrollbar-class/得到它
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