topical media & game development
actionscript-extra-fisheye-qs-controls-CachedLabel.ax
actionscript-extra-fisheye-qs-controls-CachedLabel.ax
[swf]
flex
package qs.controls
{
import mx.core.UIComponent;
import mx.core.UITextField;
import mx.core.IDataRenderer;
import flash.geom.*;
import flash.display.*
import flash.text.TextLineMetrics;;
Color of text in the component, including the component label.
The default value is <code>0x0B333C</code>.
[Style(name="color", type="uint", format="Color", inherit="yes")]
Color of the component if it is disabled.
The default value is <code>0xAAB3B3</code>.
[Style(name="disabledColor", type="uint", format="Color", inherit="yes")]
Name of the font to use.
Unlike in a full CSS implementation,
comma-separated lists are not supported.
You can use any font family name.
If you specify a generic font name,
it is converted to an appropriate device font.
The default value is <code>"Verdana"</code>.
[Style(name="fontFamily", type="String", inherit="yes")]
Height of the text in pixels.
The default value is 10.
[Style(name="fontSize", type="Number", format="Length", inherit="yes")]
Determines whether the text is italic font.
Recognized values are <code>"normal"</code> and <code>"italic"</code>.
The default value is <code>normal</code>.
[Style(name="fontStyle", type="String", enumeration="normal,italic", inherit="yes")]
Determines whether the text is boldface.
Recognized values are <code>"normal"</code> and <code>"bold"</code>.
The default value is <code>normal</code>.
[Style(name="fontWeight", type="String", enumeration="normal,bold", inherit="yes")]
Alignment of text within a container.
Possible values are <code>"left"</code>, <code>"right"</code>,
or <code>"center"</code>.
The default value is <code>"left"</code>.<br>
For the Button, LinkButton, and AccordionHeader components,
the default value is <code>"center"</code>.
For these components, this property is only recognized when the
<code>labelPlacement</code> property is set to <code>"left"</code> or
<code>"right"</code>.
If <code>labelPlacement</code> is set to <code>"top"</code> or
<code>"bottom"</code>, the text and any icon are centered.
[Style(name="textAlign", type="String", enumeration="left,center,right", inherit="yes")]
Determines whether the text is underlined.
Possible values are <code>"none"</code> and <code>"underline"</code>.
The default value is <code>none</code>.
[Style(name="qs_textDecoration", type="String", enumeration="none,underline", inherit="no")]
Offset of first line of text from the left side of the container.
The default value is 0.
[Style(name="textIndent", type="Number", format="Length", inherit="yes")]
public class @ax-actionscript-extra-fisheye-qs-controls-CachedLabel extends UIComponent implements IDataRenderer
{
private var _label:UITextField;
private var _bitmap:Bitmap;
private var _capturedText:BitmapData;
private static var xUnit:Point = new Point(1,0);
private static var origin:Point = new Point(0,0);
private var _data:Object;
private var _text:String = "";
private var _cachePolicy:String = "auto";
public function @ax-actionscript-extra-fisheye-qs-controls-CachedLabel()
{
super();
}
public function set useCache(value:String):void
{
_cachePolicy = value;
invalidateDisplayList();
}
public function get useCache():String
{
return _cachePolicy;
}
override protected function createChildren():void
{
super.createChildren();
_label = new UITextField();
_label.multiline = true;
_label.selectable = false;
_label.autoSize = "left";
_label.text = _text;
addChild(_label);
}
override protected function measure():void
{
_label.validateNow();
if(_label.embedFonts)
{
measuredWidth = _label.measuredWidth + 6;
measuredHeight = _label.measuredHeight + 4;
}
else
{
var metrics:TextLineMetrics = measureText(_text);
measuredWidth = metrics.width + 6;
measuredHeight = metrics.height + 4;
}
}
override protected function updateDisplayList(unscaledWidth:Number,
unscaledHeight:Number):void
{
_label.validateNow();
_label.setActualSize(unscaledWidth, unscaledHeight );
var localX:Point;
var localO:Point;
var useLabel:Boolean = true;
switch(_cachePolicy)
{
case "off":
useLabel = true;
break;
case "on":
useLabel = false;
break;
case "auto":
if(_label.embedFonts == false && unscaledWidth > 0 && unscaledHeight > 0)
{
localX = globalToLocal(xUnit);
localO = globalToLocal(origin);
useLabel = (localX.x - localO.x) == 1 && (localX.y - localO.y) == 0;
}
}
if(unscaledHeight <= 1 || unscaledWidth <= 1)
useLabel = true;
if(useLabel)
{
if(_bitmap != null)
{
removeChild(_bitmap);
_bitmap = null;
}
_label.visible = true;
}
else
{
_label.visible = false;
if(_capturedText == null || _capturedText.width != unscaledWidth || _capturedText.height != unscaledHeight )
{
_capturedText = new BitmapData(unscaledWidth,unscaledHeight);
if(_bitmap != null)
{
removeChild(_bitmap);
_bitmap = null;
}
}
if(_bitmap == null)
{
_bitmap = new Bitmap(_capturedText);
_bitmap.smoothing = true;
addChild(_bitmap);
}
_capturedText.fillRect(new Rectangle(0,0,unscaledWidth,unscaledHeight),0);
_capturedText.draw(_label);
}
}
[Inspectable(environment="none")]
public function get data():Object
{
return _data;
}
@private
public function set data(value:Object):void
{
if( value == _data)
return;
_data = value;
_text = String(value);
if(_label != null)
_label.text = (_text == null)? "":_text;
invalidateSize();
invalidateDisplayList();
}
override public function invalidateSize():void
{
super.invalidateSize();
}
}
}
(C) Æliens
27/08/2009
You may not copy or print any of this material without explicit permission of the author or the publisher.
In case of other copyright issues, contact the author.
