Radii8Library/src/com/flexcapacitor/views/BlendMode.mxml

<?xml version="1.0" encoding="utf-8"?>
<!--

Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements.  See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License.  You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

-->
<s:Group xmlns:fc="com.flexcapacitor.controls.*"
		 xmlns:fx="http://ns.adobe.com/mxml/2009" 
		 xmlns:mx="library://ns.adobe.com/flex/mx"
		 xmlns:s="library://ns.adobe.com/flex/spark"
		 xmlns:utils="com.flexcapacitor.utils.*" 
		 xmlns:handlers="com.flexcapacitor.handlers.*"
		 xmlns:supportClasses="com.flexcapacitor.effects.supportClasses.*"
		 xmlns:local="*"
		 
		 width="100%" 
		 creationComplete="group1_creationCompleteHandler(event)"
		 >
	
	<fx:Script>
		<![CDATA[
			import com.flexcapacitor.controller.Radiate;
			import com.flexcapacitor.events.RadiateEvent;
			
			import mx.events.FlexEvent;
			
			import spark.events.IndexChangeEvent;
			
			private var radiate:Radiate = Radiate.getInstance();
			private var _target:Object;
			private static const BLEND_MODE:String = "blendMode";
			
			public function get target():Object {
				return _target;
			}

			public function set target(value:Object):void {
				if (_target == value) return;
				
				if (!(value is DisplayObject)) {
					_target = null;
					blendModeCombo.selectedIndex = -1;
				}
				else {
					_target = value;
					updateSelectedBlendMode();
				}
			}

			protected function applyPropertiesToTargetHandler(event:IndexChangeEvent = null):void {
				
				if (target) {
					Radiate.setProperty(target, BLEND_MODE, blendModeCombo.selectedItem.value);
				}
			}
			
			protected function group1_creationCompleteHandler(event:FlexEvent):void {
				radiate.addEventListener(RadiateEvent.TARGET_CHANGE, targetChangeHandler);
				radiate.addEventListener(RadiateEvent.PROPERTY_CHANGED, propertyChangeHandler);
				
				if (radiate.target) {
					target = radiate.target;
				}
			}
			
			protected function targetChangeHandler(event:RadiateEvent):void {
				target = event.selectedItem;
			}
			
			protected function propertyChangeHandler(event:RadiateEvent):void {
				var displayObject:DisplayObject = event.selectedItem as DisplayObject;
				var currentBlendMode:String;
				var currentIndex:int;
				
				var properties:Array = event.properties;
				
				for (var i:int;i<length;i++) {
					if (properties[i]==BLEND_MODE) {
						updateSelectedBlendMode();
						break;
					}
				}
			}
			
			/**
			 * Updates the list to reflect the current blend mode of the target
			 * */
			private function updateSelectedBlendMode():void {
				var displayObject:DisplayObject = target as DisplayObject;
				var currentBlendMode:String;
				var currentIndex:int;
				
				if (displayObject) {
					currentBlendMode = displayObject.blendMode;
					currentIndex = getItemIndexByKeys(blendModes, {value:currentBlendMode});
					blendModeCombo.selectedIndex = currentIndex;
				}
			}
			
			/**
			 * Modified code from CASALIBRARY
			 * @modified true 9/10/2011
			 * */
			
			/**
			 * Returns the index of the first item that match the key values of all 
			 * properties of the object <code>keyValues</code>.
			 
			 @param inArray: Array to search for an element with every key value in the object <code>keyValues</code>.
			 @param keyValues: An object with key value pairs.
			 @return Returns the first matched item; otherwise <code>null</code>.
			 @example
			 <code>
			 var people:Array  = new Array({name: "Aaron", sex: "Male", hair: "Brown"}, {name: "Linda", sex: "Female", hair: "Blonde"}, {name: "Katie", sex: "Female", hair: "Brown"}, {name: "Nikki", sex: "Female", hair: "Blonde"});
			 var person:Object = ArrayUtil.getItemByKeys(people, {sex: "Female", hair: "Brown"});
			 
			 trace(person.name); // Traces "Katie"
			 </code>
			 */
			public static function getItemIndexByKeys(array:Array, keyValues:Object):int {
				var i:int = -1;
				var item:*;
				var hasKeys:Boolean;
				
				while (++i < array.length) {
					item    = array[i];
					hasKeys = true;
					
					for (var j:String in keyValues) {
						if (!(j in item) || item[j] != keyValues[j]) {
							hasKeys = false;
						}
					}
					
					if (hasKeys) {
						return i;
					}
				}
				
				return -1;
			}
			
			
		]]>
	</fx:Script>
	
	<fx:Declarations>
		
		<!--
		
		// If one of the non-native Flash blendModes is set, 
		// record the new value and set the appropriate 
		// blendShader on the display object.
		
		value =="colordodge" 
		value =="colorburn" 
		value =="exclusion" 
		value =="softlight" 
		value =="hue"
		value =="saturation" 
		value =="color"
		value =="luminosity"
		-->
		
		<fx:Array id="blendModes">
			<fx:Object label="Auto" value="auto"/>
			<fx:Object label="Add" value="add"/>
			<fx:Object label="Alpha" value="alpha"/>
			<fx:Object label="Color" value="color"/>
			<fx:Object label="Color Burn" value="colorburn"/>
			<fx:Object label="Color Dodge" value="colordodge"/>
			<fx:Object label="Darken" value="darken"/>
			<fx:Object label="Difference" value="difference"/>
			<fx:Object label="Erase" value="erase"/>
			<fx:Object label="Exclusion" value="exclusion"/>
			<fx:Object label="Hardlight" value="hardlight"/>
			<fx:Object label="Hue" value="hue"/>
			<fx:Object label="Invert" value="invert"/>
			<fx:Object label="Layer" value="layer"/>
			<fx:Object label="Lighten" value="lighten"/>
			<fx:Object label="Luminosity" value="luminosity"/>
			<fx:Object label="Multiply" value="multiply"/>
			<fx:Object label="Normal" value="normal"/>
			<fx:Object label="Overlay" value="overlay"/>
			<fx:Object label="Saturation" value="saturation"/>
			<fx:Object label="Screen" value="screen"/>
			<fx:Object label="Softlight" value="softlight"/>
			<fx:Object label="Subtract" value="subtract"/>
			<fx:Object label="Normal" value="normal"/>
		</fx:Array>
		
		<s:ArrayCollection id="blendModesCollection" source="{blendModes}"/>
	</fx:Declarations>

	<s:DropDownList id="blendModeCombo"
					interactionMode="mouse"
					width="100%"
					left="4"
					change="applyPropertiesToTargetHandler(event)"
					focusOut="applyPropertiesToTargetHandler()"
					dataProvider="{blendModesCollection}">
	</s:DropDownList>

</s:Group>