Flex Examples » Component (Spark) http://blog.flexexamples.com Just a bunch of Adobe Flex Examples Wed, 26 Jan 2011 18:09:51 +0000 en hourly 1 Creating a custom component using the Component tag in Flex 4 http://blog.flexexamples.com/2009/11/05/creating-a-custom-component-using-the-component-tag-in-flex-4/ http://blog.flexexamples.com/2009/11/05/creating-a-custom-component-using-the-component-tag-in-flex-4/#comments Thu, 05 Nov 2009 15:14:15 +0000 Peter deHaan http://blog.flexexamples.com/?p=2152 The following example shows how you can create a simple, inline custom component in Flex 4 using the Component tag and className property and then instantiating new instances using ActionScript.

Full code after the jump.

<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/11/05/creating-a-custom-component-using-the-component-tag-in-flex-4/ --> <s:Application name="Spark_Component_className_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark">   <fx:Script> <![CDATA[ import mx.graphics.SolidColor;   private function init():void [...]]]> The following example shows how you can create a simple, inline custom component in Flex 4 using the Component tag and className property and then instantiating new instances using ActionScript.

Full code after the jump.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/11/05/creating-a-custom-component-using-the-component-tag-in-flex-4/ -->
<s:Application name="Spark_Component_className_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark">
 
    <fx:Script>
        <![CDATA[
            import mx.graphics.SolidColor;
 
            private function init():void {
                var c:FancyCircle = new FancyCircle();
                c.fill = new SolidColor(Math.random() * 0xFFFFFF /* color */,
                                        Math.random() /* alpha */);
                gr.addElement(c);
            }
        ]]>
    </fx:Script>
 
    <fx:Declarations>
        <fx:Component className="FancyCircle">
            <s:Ellipse>
                <s:stroke>
                    <s:SolidColorStroke />
                </s:stroke>
            </s:Ellipse>
        </fx:Component>
    </fx:Declarations>
 
    <s:Panel id="pnl" horizontalCenter="0" verticalCenter="0">
        <s:controlBarContent>
            <s:Button id="btn" label="Add Circle" click="init();" />
        </s:controlBarContent>
        <s:Scroller verticalScrollPolicy="on">
            <s:Group id="gr">
                <s:layout>
                    <s:TileLayout requestedColumnCount="4" requestedRowCount="3" columnWidth="100" rowHeight="100" />
                </s:layout>
            </s:Group>
        </s:Scroller>
    </s:Panel>
 
</s:Application>

Or, if you want to create a new instance of your custom component using MXML, you can create a local namespace, as seen in the following example:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/11/05/creating-a-custom-component-using-the-component-tag-in-flex-4/ -->
<s:Application name="Spark_Component_className_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:local="*">
 
    <fx:Declarations>
        <fx:Component className="FancyCircle">
            <s:Ellipse>
                <s:stroke>
                    <s:SolidColorStroke />
                </s:stroke>
            </s:Ellipse>
        </fx:Component>
    </fx:Declarations>
 
    <s:Panel id="pnl" horizontalCenter="0" verticalCenter="0">
        <s:Scroller verticalScrollPolicy="on">
            <s:Group id="gr">
                <s:layout>
                    <s:TileLayout requestedColumnCount="4"
                            requestedRowCount="3"
                            columnWidth="100" rowHeight="100" />
                </s:layout>
                <local:FancyCircle>
                    <local:fill>
                        <s:SolidColor color="red" />
                    </local:fill>
                </local:FancyCircle>
                <local:FancyCircle>
                    <local:fill>
                        <s:SolidColor color="haloOrange" />
                    </local:fill>
                </local:FancyCircle>
                <local:FancyCircle>
                    <local:fill>
                        <s:SolidColor color="yellow" />
                    </local:fill>
                </local:FancyCircle>
                <local:FancyCircle>
                    <local:fill>
                        <s:SolidColor color="haloGreen" />
                    </local:fill>
                </local:FancyCircle>
                <local:FancyCircle>
                    <local:fill>
                        <s:SolidColor color="haloBlue" />
                    </local:fill>
                </local:FancyCircle>
            </s:Group>
        </s:Scroller>
    </s:Panel>
 
</s:Application>

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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