RE: [flexcoders] TextArea.text confusion

[Alex Harui]

Sounds like he wants the light grey "add comments"  in the TA and then
have it clear on focus in.

 

For sure, textChanged will be false by the time you get back from
super.commitProperties so I think I'd check the text before calling
super.commitProperties and change it to the default if needed.

 

________________________________

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Tracy Spratt
Sent: Thursday, March 15, 2007 5:33 PM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] TextArea.text confusion

 

What is the problem behavior?  I need a bit more detail before I run or
analyze the code.

Tracy

 

________________________________

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Roman Protsiuk
Sent: Thursday, March 15, 2007 7:04 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] TextArea.text confusion

 

Hi, all.

I'm extending TextArea to make it show default text if it's empty. It
will be cleared (if needed) on focusIn.
The problem I've faced is that when I set text property in
commitProperties method that text isn't shown in the TextArea itself. :\


Following is my class:

package {
    
    import flash.display.DisplayObject;
    import flash.events.FocusEvent;
    
    import mx.controls.TextArea;
    
    public class ExtendedTextArea extends TextArea { 
        
        public function get defaultText() : String {
            return _defaultText;
        }
        
        public function set defaultText(value : String) : void {
            _defaultText = value; 
            _defaultTextChanged = true;
            invalidateProperties();
        }
        
        public function get defaultTextFunctional() : Boolean {
            return _defaultTextFunctional;
        }
        
        public function set defaultTextFunctional(value : Boolean) :
void {
            _defaultTextFunctional = value;
        }
        
        override public function get text() : String { 
            if (_showingDefaultText) {
                return "";
            } else {
                return super.text;
            }
        }
        
        override public function set text(value : String) : void { 
            super.text = value;
            _textChanged = true;
            invalidateProperties();
        }
        
        override protected function commitProperties() : void {
            super.commitProperties ();

            if ((_textChanged || _defaultTextChanged) && text == "") {
                setText(_defaultText, true);
            }
            
            _textChanged = false;
            _defaultTextChanged = false;
        }
        
        override protected function focusInHandler(event : FocusEvent) :
void {
            super.focusInHandler(event);
            if (contains(DisplayObject( event.target)) &&
_showingDefaultText && !_defaultTextFunctional) {
                setText("");
            }
        }
        
        override protected function focusOutHandler(event : FocusEvent)
: void { 
            super.focusOutHandler(event);
            if (contains(DisplayObject(event.target)) &&
!_defaultTextFunctional && text == "") {
                setText(_defaultText, true);
            }
        }
        
        private function setText(value : String, isDefaultText : Boolean
= false) : void {
            text = value;
            _showingDefaultText = isDefaultText;
        } 
        
        private var _defaultText : String = "";
        
        private var _defaultTextChanged : Boolean;
        
        private var _textChanged : Boolean;
        
        private var _showingDefaultText : Boolean; 
        
        private var _defaultTextFunctional : Boolean;
        
    }
    
}

The class is far from complete.
Here's sample application:

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml
<http://www.adobe.com/2006/mxml> " layout="vertical">
    <ExtendedTextArea
        width="220"
        height="80" 
        defaultText="Album description goes here..."
        />
    <mx:Button label="button" />
</mx:Application>

Can anyone explain me this behavior and/or where is my mistake? 

Thanks,
R.