Adding a rollover state to a Spark Button when state is disabled - actionscript-3

Question

I need to add a rollover effect to the disabled state of a Spark button. This way, users can rollover the button and know why the button is disabled.
I think I would have to override ButtonBase's getCurrentSkinState. Is there anyway to test if a mouse cursor is over a disabled button?
Thanks.

Answer 1

Try to use the following:
package
{
import spark.components.Button;
[SkinState("overDisabled")]
public class ButtonWithOverInDisabled extends Button
{
private var _enabledInvalidaationPhase:Boolean = false;
private var _explicitMouseChildren:Boolean = true;
private var _explicitMouseEnabled:Boolean = true;
override public function get enabled():Boolean
{
if (_enabledInvalidaationPhase)
return true;
return super.enabled;
}
override public function set enabled(value:Boolean):void
{
_enabledInvalidaationPhase = true;
super.enabled = value;
super.mouseChildren = _explicitMouseChildren;
super.mouseEnabled = _explicitMouseEnabled;
_enabledInvalidaationPhase = false;
}
override public function set mouseChildren(value:Boolean):void
{
super.mouseChildren = value;
_explicitMouseChildren = value;
}
override public function set mouseEnabled(value:Boolean):void
{
super.mouseEnabled = value;
_explicitMouseEnabled = value;
}
override protected function getCurrentSkinState():String
{
if ((hovered || mouseCaptured) && !enabled)
return "overDisabled";
return super.getCurrentSkinState();
}
}
}
Spark skin may looks like the following:
<?xml version="1.0" encoding="utf-8"?>
<s:SparkSkin xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:fb="http://ns.adobe.com/flashbuilder/2009" minWidth="21" minHeight="21" alpha.disabledState="0.5">
<fx:Metadata>[HostComponent("ButtonWithOverInDisabled")]</fx:Metadata>
<fx:Script fb:purpose="styling">
<![CDATA[
/* Define the skin elements that should not be colorized.
For button, the graphics are colorized but the label is not. */
static private const exclusions:Array = ["labelDisplay"];
/**
* #private
*/
override public function get colorizeExclusions():Array {return exclusions;}
/**
* #private
*/
override protected function initializationComplete():void
{
useChromeColor = true;
super.initializationComplete();
}
/**
* #private
*/
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number) : void
{
var cr:Number = getStyle("cornerRadius");
if (cornerRadius != cr)
{
cornerRadius = cr;
shadow.radiusX = cornerRadius;
fill.radiusX = cornerRadius;
lowlight.radiusX = cornerRadius;
highlight.radiusX = cornerRadius;
border.radiusX = cornerRadius;
}
if (highlightStroke) highlightStroke.radiusX = cornerRadius;
if (hldownstroke1) hldownstroke1.radiusX = cornerRadius;
if (hldownstroke2) hldownstroke2.radiusX = cornerRadius;
super.updateDisplayList(unscaledWidth, unscaledHeight);
}
private var cornerRadius:Number = 2;
]]>
</fx:Script>
<!-- states -->
<s:states>
<s:State name="up" />
<s:State name="over" stateGroups="overState" />
<s:State name="down" />
<s:State name="disabled" stateGroups="disabledState" />
<s:State name="overDisabled" stateGroups="overState,disabledState" />
</s:states>
<!-- layer 1: shadow -->
<!--- #private -->
<s:Rect id="shadow" left="-1" right="-1" top="-1" bottom="-1" radiusX="2">
<s:fill>
<s:LinearGradient rotation="90">
<s:GradientEntry color="0x000000"
color.down="0xFFFFFF"
alpha="0.01"
alpha.down="0" />
<s:GradientEntry color="0x000000"
color.down="0xFFFFFF"
alpha="0.07"
alpha.down="0.5" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!-- layer 2: fill -->
<!--- #private -->
<s:Rect id="fill" left="1" right="1" top="1" bottom="1" radiusX="2">
<s:fill>
<s:LinearGradient rotation="90">
<s:GradientEntry color="0xFFFFFF"
color.overState="0xBBBDBD"
color.down="0xAAAAAA"
alpha="0.85" />
<s:GradientEntry color="0xD8D8D8"
color.overState="0x9FA0A1"
color.down="0x929496"
alpha="0.85" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!-- layer 3: fill lowlight -->
<!--- #private -->
<s:Rect id="lowlight" left="1" right="1" top="1" bottom="1" radiusX="2">
<s:fill>
<s:LinearGradient rotation="270">
<s:GradientEntry color="0x000000" ratio="0.0" alpha="0.0627" />
<s:GradientEntry color="0x000000" ratio="0.48" alpha="0.0099" />
<s:GradientEntry color="0x000000" ratio="0.48001" alpha="0" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!-- layer 4: fill highlight -->
<!--- #private -->
<s:Rect id="highlight" left="1" right="1" top="1" bottom="1" radiusX="2">
<s:fill>
<s:LinearGradient rotation="90">
<s:GradientEntry color="0xFFFFFF"
ratio="0.0"
alpha="0.33"
alpha.overState="0.22"
alpha.down="0.12"/>
<s:GradientEntry color="0xFFFFFF"
ratio="0.48"
alpha="0.33"
alpha.overState="0.22"
alpha.down="0.12" />
<s:GradientEntry color="0xFFFFFF"
ratio="0.48001"
alpha="0" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!-- layer 5: highlight stroke (all states except down) -->
<!--- #private -->
<s:Rect id="highlightStroke" left="1" right="1" top="1" bottom="1" radiusX="2" excludeFrom="down">
<s:stroke>
<s:LinearGradientStroke rotation="90" weight="1">
<s:GradientEntry color="0xFFFFFF" alpha.overState="0.22" />
<s:GradientEntry color="0xD8D8D8" alpha.overState="0.22" />
</s:LinearGradientStroke>
</s:stroke>
</s:Rect>
<!-- layer 6: highlight stroke (down state only) -->
<!--- #private -->
<s:Rect id="hldownstroke1" left="1" right="1" top="1" bottom="1" radiusX="2" includeIn="down">
<s:stroke>
<s:LinearGradientStroke rotation="90" weight="1">
<s:GradientEntry color="0x000000" alpha="0.25" ratio="0.0" />
<s:GradientEntry color="0x000000" alpha="0.25" ratio="0.001" />
<s:GradientEntry color="0x000000" alpha="0.07" ratio="0.0011" />
<s:GradientEntry color="0x000000" alpha="0.07" ratio="0.965" />
<s:GradientEntry color="0x000000" alpha="0.00" ratio="0.9651" />
</s:LinearGradientStroke>
</s:stroke>
</s:Rect>
<!--- #private -->
<s:Rect id="hldownstroke2" left="2" right="2" top="2" bottom="2" radiusX="2" includeIn="down">
<s:stroke>
<s:LinearGradientStroke rotation="90" weight="1">
<s:GradientEntry color="0x000000" alpha="0.09" ratio="0.0" />
<s:GradientEntry color="0x000000" alpha="0.00" ratio="0.0001" />
</s:LinearGradientStroke>
</s:stroke>
</s:Rect>
<!-- layer 7: border - put on top of the fill so it doesn't disappear when scale is less than 1 -->
<!--- #private -->
<s:Rect id="border" left="0" right="0" top="0" bottom="0" width="69" height="20" radiusX="2">
<s:stroke>
<s:LinearGradientStroke rotation="90" weight="1">
<s:GradientEntry color="0x000000"
alpha="0.5625"
alpha.down="0.6375" />
<s:GradientEntry color="0x000000"
alpha="0.75"
alpha.down="0.85" />
</s:LinearGradientStroke>
</s:stroke>
</s:Rect>
<!-- layer 8: text -->
<!--- #copy spark.components.supportClasses.ButtonBase#labelDisplay -->
<s:Label id="labelDisplay"
textAlign="center"
verticalAlign="middle"
maxDisplayedLines="1"
horizontalCenter="0" verticalCenter="1"
left="10" right="10" top="2" bottom="2">
</s:Label>
</s:SparkSkin>
Hope this helps! :)