The following example shows how you can set the corner radius on a Halo MenuBar control in Flex 4 by creating a custom skin and setting the radiusX and radiusY properties.
Full code after the jump.
<?xml version=”1.0″ encoding=”utf-8″?>
<s:Application name=”Halo_MenuBar_cornerRadius_test”
xmlns:fx=”http://ns.adobe.com/mxml/2009″
xmlns:s=”library://ns.adobe.com/flex/spark”
xmlns:mx=”library://ns.adobe.com/flex/halo”>
<mx:ApplicationControlBar width=”100%” cornerRadius=”0″>
<mx:Form styleName=”plain”>
<mx:FormItem labal=”cornerRadius:”>
<s:HSlider id=”slider”
minimum=”0″
maximum=”{menuBar.height/2}”
value=”2″ />
</mx:FormItem>
</mx:Form>
</mx:ApplicationControlBar>
<mx:MenuBar id=”menuBar”
labelField=”@label”
showRoot=”false”
cornerRadius=”{slider.value}”
backgroundSkin=”skins.CustomButtonSkin”
horizontalCenter=”0″ verticalCenter=”0″>
<mx:dataProvider>
<fx:XML>
<root>
<parent label=”File”>
<node label=”a) File” />
<node label=”b) File” />
<node label=”c) File” />
<node label=”d) File” />
<node label=”e) File” />
</parent>
<parent label=”Edit”>
<node label=”a) Edit” />
<node label=”b) Edit” />
</parent>
<parent label=”View”>
<parent label=”a) View” />
<parent label=”b) View” />
<parent label=”c) View” />
</parent>
<parent label=”Favorites”>
<parent label=”a) Favorites” />
</parent>
<parent label=”Tools”>
<node label=”a) Tools” />
<node label=”b) Tools” />
<node label=”c) Tools” />
</parent>
<parent label=”Help”>
<node label=”a) Help” />
<node label=”b) Help” />
<node label=”c) Help” />
<node label=”d) Help” />
</parent>
</root>
</fx:XML>
</mx:dataProvider>
</mx:MenuBar>
</s:Application>
And the custom skin class, skins/CustomButtonSkin.mxml, is as follows:
<?xml version=”1.0″ encoding=”utf-8″?>
<local:SparkSkinForHalo name=”CustomButtonSkin”
xmlns:fx=”http://ns.adobe.com/mxml/2009″
xmlns:s=”library://ns.adobe.com/flex/spark”
xmlns:local=”mx.skins.spark.*”
minWidth=”21″ minHeight=”19″
alpha.disabled=”0.5″>
<!– states –>
<local:states>
<s:State name=”up” />
<s:State name=”over” stateGroups=”overStates” />
<s:State name=”down” stateGroups=”downStates” />
<s:State name=”disabled” stateGroups=”disabledStates” />
<s:State name=”selectedUp” stateGroups=”selectedStates, selectedUpStates” />
<s:State name=”selectedOver” stateGroups=”overStates, selectedStates” />
<s:State name=”selectedDown” stateGroups=”downStates, selectedStates” />
<s:State name=”selectedDisabled” stateGroups=”selectedUpStates, disabledStates,
selectedStates” />
</local:states>
<fx:Script>
<![CDATA[
/* Define the border items.*/
static private const borderItem:Array = [”borderEntry1″, “borderEntry2″];
override protected function get borderItems():Array {
return borderItem;
}
]]>
</fx:Script>
<fx:Declarations>
<fx:Number id=”cornerRad”>{getStyle(”cornerRadius”)}</fx:Number>
</fx:Declarations>
<!– layer 1: shadow –>
<s:Rect left=”-1″ right=”-1″ top=”-1″ bottom=”-1″
radiusX=”{cornerRad}” radiusY=”{cornerRad}”>
<s:fill>
<s:LinearGradient rotation=”90″>
<s:GradientEntry color=”0×000000″
color.downStates=”0xFFFFFF”
alpha=”0.01″
alpha.downStates=”0″ />
<s:GradientEntry color=”0×000000″
color.downStates=”0xFFFFFF”
alpha=”0.07″
alpha.downStates=”0.5″ />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!– layer 2: fill –>
<s:Rect left=”1″ right=”1″ top=”1″ bottom=”1″
radiusX=”{cornerRad}” radiusY=”{cornerRad}”>
<s:fill>
<s:LinearGradient rotation=”90″>
<s:GradientEntry color=”0xFFFFFF”
color.selectedUpStates=”0xBBBDBD”
color.overStates=”0xBBBDBD”
color.downStates=”0xAAAAAA”
alpha=”0.85″
alpha.selectedOver=”1″ />
<s:GradientEntry color=”0xD8D8D8″
color.selectedUpStates=”0×9FA0A1″
color.over=”0×9FA0A1″
color.selectedOver=”0×8E8F90″
color.downStates=”0×929496″
alpha=”0.85″
alpha.selectedOver=”1″ />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!– layer 3: fill lowlight –>
<s:Rect left=”1″ right=”1″ bottom=”1″ height=”9″
radiusX=”{cornerRad}” radiusY=”{cornerRad}”>
<s:fill>
<s:LinearGradient rotation=”90″>
<s:GradientEntry color=”0×000000″ alpha=”0.0099″ />
<s:GradientEntry color=”0×000000″ alpha=”0.0627″ />
</s:LinearGradient>
</s:fill>
</s:Rect>
<!– layer 4: fill highlight –>
<s:Rect left=”1″ right=”1″ top=”1″ height=”9″
radiusX=”{cornerRad}” radiusY=”{cornerRad}”>
<s:fill>
<s:SolidColor color=”0xFFFFFF”
alpha=”0.33″
alpha.selectedUpStates=”0.22″
alpha.overStates=”0.22″
alpha.downStates=”0.12″ />
</s:fill>
</s:Rect>
<!– layer 5: highlight stroke (all states except down) –>
<s:Rect left=”1″ right=”1″ top=”1″ bottom=”1″
radiusX=”{cornerRad}” radiusY=”{cornerRad}”
excludeFrom=”downStates”>
<s:stroke>
<s:LinearGradientStroke rotation=”90″ weight=”1″>
<s:GradientEntry color=”0xFFFFFF”
alpha.overStates=”0.22″
alpha.selectedUpStates=”0.33″ />
<s:GradientEntry color=”0xD8D8D8″
alpha.overStates=”0.22″
alpha.selectedUpStates=”0.33″ />
</s:LinearGradientStroke>
</s:stroke>
</s:Rect>
<!– layer 6: highlight stroke (down state only) –>
<s:Rect left=”1″ top=”1″ bottom=”1″ width=”1″
includeIn=”downStates, selectedUpStates, selectedOver”>
<s:fill>
<s:SolidColor color=”0×000000″ alpha=”0.07″ />
</s:fill>
</s:Rect>
<s:Rect right=”1″ top=”1″ bottom=”1″ width=”1″
includeIn=”downStates, selectedUpStates, selectedOver”>
<s:fill>
<s:SolidColor color=”0×000000″ alpha=”0.07″ />
</s:fill>
</s:Rect>
<s:Rect left=”2″ top=”1″ right=”2″ height=”1″
includeIn=”downStates, selectedUpStates, selectedOver”>
<s:fill>
<s:SolidColor color=”0×000000″ alpha=”0.25″ />
</s:fill>
</s:Rect>
<s:Rect left=”1″ top=”2″ right=”1″ height=”1″
includeIn=”downStates, selectedUpStates, selectedOver”>
<s:fill>
<s:SolidColor color=”0×000000″ alpha=”0.09″ />
</s:fill>
</s:Rect>
<s:Rect left=”0″ right=”0″ top=”0″ bottom=”0″
width=”69″ height=”20″
radiusX=”{cornerRad}” radiusY=”{cornerRad}”>
<s:stroke>
<s:LinearGradientStroke rotation=”90″ weight=”1″>
<s:GradientEntry id=”borderEntry1″
alpha=”0.5625″
alpha.down=”0.6375″
alpha.selectedStates=”0.6375″ />
<s:GradientEntry id=”borderEntry2″
alpha=”0.75″
alpha.down=”0.85″
alpha.selectedStates=”0.85″ />
</s:LinearGradientStroke>
</s:stroke>
</s:Rect>
</local:SparkSkinForHalo>
This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.
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