tourdeflexmodules/src/spark/layouts/CustomLayoutHBaselineExample.mxml

<?xml version="1.0" encoding="utf-8"?>
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  this work for additional information regarding copyright ownership.
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      http://www.apache.org/licenses/LICENSE-2.0

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  distributed under the License is distributed on an "AS IS" BASIS,
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  See the License for the specific language governing permissions and
  limitations under the License.

-->
<!-- http://evtimmy.com/2010/02/extending-horizontallayout-to-support-baseline-align-to-text/ -->
<s:Module xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" 
			   xmlns:local="*">
	<fx:Script>
		<![CDATA[
			import mx.events.FlexEvent;
			
			protected function update(event:Event):void
			{
				globalBaseline.top = theLayout.actualBaseline;
				checkBoxBaseline.top = checkBox.y + checkBox.baselinePosition;
				labelBaseline.top = label.y + label.baselinePosition;
				labelBaseline.left = label.x;
				buttonBaseline.top = button.y + button.baselinePosition; 
				buttonBaseline.left = button.x;
			}
			
		]]>
	</fx:Script>
	
	<s:Panel width="100%" height="100%" title="CustomLayout with HBaselineLayout">
		
		<!-- Controls -->
		<s:HGroup left="14" top="5">
			<s:VGroup>
				<s:CheckBox label="Checkbox" id="showCheckBox" selected="true"/>
				<s:CheckBox label="Label" id="showLabel" selected="true"/>
				<s:CheckBox label="Button " id="showButton" selected="true"/>
				<s:CheckBox label="Layout " id="showLayout" selected="true"/>
			</s:VGroup>
			
			<s:TileGroup requestedColumnCount="2">
				<s:CheckBox id="baseline1Check" label="Offset Checkbox baseline" selected="true"/>
				<s:HSlider id="baseline1Slider" minimum="-100" maximum="100" enabled="{baseline1Check.selected}" width="160"/>
				<s:CheckBox id="baseline2Check" label="Offset Label baseline" selected="true"/>
				<s:HSlider id="baseline2Slider" minimum="-100" maximum="100" enabled="{baseline2Check.selected}" width="160"/>
				<s:CheckBox id="baseline3Check" label="Offset Button baseline" selected="true"/>
				<s:HSlider id="baseline3Slider" minimum="-100" maximum="100" enabled="{baseline3Check.selected}" width="160"/>
				<s:CheckBox id="baseline4Check" label="Offset Layout baseline"/>
				<s:HSlider id="baseline4Slider" minimum="-100" maximum="100" enabled="{baseline4Check.selected}" width="160" value="15"/>
				<s:CheckBox id="buttonHeightCheck" label="Override Button height" selected="true"/>
				<s:HSlider id="buttonHeightSlider" minimum="21" maximum="150" enabled="{buttonHeightCheck.selected}" width="160" value="21"/>
			</s:TileGroup>
		</s:HGroup>
		
		
		<s:Group id="container" updateComplete="update(event)" top="138" horizontalCenter="0">
			<s:layout>
				<local:HBaselineLayout id="theLayout" verticalAlign="baseline"
									   globalBaseline="{baseline4Check.selected ? baseline4Slider.value : NaN}"/>
			</s:layout>
			<s:CheckBox id="checkBox" label="One check box" move="update(event)"
						baseline="{baseline1Check.selected ? baseline1Slider.value : 0}"/>
			<s:Label id="label" text="...and some random text..." move="update(event)"
					 baseline="{baseline2Check.selected ? baseline2Slider.value : 0}"/>
			<s:Button id="button" label="and a Button!" move="update(event)"
					  height="{buttonHeightCheck.selected ? buttonHeightSlider.value : 21}"
					  baseline="{baseline3Check.selected ? baseline3Slider.value : 0}"/>
			<!-- visual guides for the baselines -->
			<s:Group includeInLayout="false">
				<s:Line width="{container.width}" id="globalBaseline" top="{theLayout.actualBaseline}"
						visible="{showLayout.selected}">
					<s:stroke>
						<s:SolidColorStroke color="0x00FF00" weight="2"/>
					</s:stroke>
				</s:Line>
				
				<s:Line width="{checkBox.width-1}" id="checkBoxBaseline"
						visible="{showCheckBox.selected}">
					<s:stroke>
						<s:SolidColorStroke color="0xFF0000" alpha="0.5" weight="2"/>
					</s:stroke>
				</s:Line>
				
				<s:Line width="{label.width-1}" id="labelBaseline"
						visible="{showLabel.selected}">
					<s:stroke>
						<s:SolidColorStroke color="0x0000FF" alpha="0.5" weight="2"/>
					</s:stroke>
				</s:Line>
				
				<s:Line width="{button.width-1}" id="buttonBaseline"
						visible="{showButton.selected}">
					<s:stroke>
						<s:SolidColorStroke color="0xFF00FF" alpha="0.5" weight="2"/>
					</s:stroke>
				</s:Line>
			</s:Group>
		</s:Group>
		<s:Label right="14" top="7" color="0x323232" width="200"
				 text="This sample shows how you can create a custom layout to extend the HorizontalLayout to provide
				 baseline alignment functionality."/>
	</s:Panel>
	
</s:Module>