Nice find. I don’t remember seeing this in the documentation.

Hi,

I’m New to Flex and Flash, I want to develop a auto height textarea with custom scrollbar and for that. In the textarea for the scroll bars I don’t want Top and Bottom Arrows.

could you please help me on that.

********************** This is the MXML file*********************

and

**********************This is the AS file to set the auto height *****************

// ActionScript file
package components {
import flash.events.Event;

import mx.controls.Alert;
import mx.controls.TextArea;

public class DynamicTextArea extends TextArea{
public function DynamicTextArea(){
super();
super.horizontalScrollPolicy = “off”;
super.verticalScrollPolicy = “off”;
this.addEventListener(Event.CHANGE, adjustHeightHandler);
}
private function adjustHeightHandler(event:Event):void{
trace(“textField.getLineMetrics(0).height: ” +
textField.getLineMetrics(0).height);

height = textField.textHeight;
if(height<99){
super.verticalScrollPolicy = "off";
}
else{
super.verticalScrollPolicy = "on";
}
//super.verticalScrollPolicy = "on";
if(height <= textField.textHeight +
textField.getLineMetrics(0).height){
height = textField.textHeight;
validateNow();
}

}
override public function set text(val:String):void{
textField.text = val;
validateNow();
height = textField.textHeight;
validateNow();
}
override public function set htmlText(val:String):void{
textField.htmlText = val;
validateNow();
height = textField.textHeight;
validateNow();
}
override public function set height(value:Number):void{
if(textField == null){
if(height <= value){
super.height = value;
}
}else{
var currentHeight:uint = textField.textHeight +
textField.getLineMetrics(0).height;
if (currentHeight<= super.maxHeight){
if(textField.textHeight !=
textField.getLineMetrics(0).height){
super.height = currentHeight;
}
}else{
super.height = super.maxHeight;
}
}
}

}
}

Please help

Thanks in Advance

Thanks. Just what I was looking for.

Has anyone tried this with flex SDK 4.1

@Scptt Jordan

Yes and for some reason, it’s not working. When setting heightInLines to {NaN} the TextArea is rendering to 1 line in height. Anyone else?

Here’s the code:

[code]

[/code]

Awesome post. Saved me hours of trying to figure it out (like I did in Flex 3) – thanks!

@Tim John
Same issue for me with SDK 4.1
Any workaround to solve it ?
Thanks

To achieve this in Flex SDK 4.1. you do not need to provide heightInLines=”{NaN}”
in text area, instead copy/create custom TextArea skin.
from skin, remove scroller and change the textDisplay properties as below

from updateDisplayList, change
textDisplay.left = textDisplay.top = textDisplay.right = textDisplay.bottom = 1;
to
textDisplay.left = textDisplay.top = textDisplay.right = 1;

for both the conditions.

In Flex SDK 4.1 use

In Flex SDK 4.1 use s:RichEditableText

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