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Create custom shape in Flex

Posted on 2007-11-27
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5,660 Views
Last Modified: 2008-07-21
Hi Experts,

I want to create a custom shape, like different US states maps image in flex. How would I do this ? I have tried ImageMap from Flexlib. It is not what I wanted. I need some action script class which can create custom shape/polygon and result it as bitmap so that I can display that in flex.

Thanks
CK
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Question by:chinu1310
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Expert Comment

by:Gary Benade
ID: 20366348
http://livedocs.adobe.com/flex/201/langref/flash/display/Graphics.html
package {
    import flash.display.DisplayObject;
    import flash.display.Graphics;
    import flash.display.Shape;
    import flash.display.Sprite;
 
    public class GraphicsExample extends Sprite {
        private var size:uint         = 80;
        private var bgColor:uint      = 0xFFCC00;
        private var borderColor:uint  = 0x666666;
        private var borderSize:uint   = 0;
        private var cornerRadius:uint = 9;
        private var gutter:uint       = 5;
 
        public function GraphicsExample() {
            doDrawCircle();
            doDrawRoundRect();
            doDrawRect();
            refreshLayout();
        }
 
        private function refreshLayout():void {
            var ln:uint = numChildren;
            var child:DisplayObject;
            var lastChild:DisplayObject = getChildAt(0);
            lastChild.x = gutter;
            lastChild.y = gutter;
            for (var i:uint = 1; i < ln; i++) {
                child = getChildAt(i);
                child.x = gutter + lastChild.x + lastChild.width;
                child.y = gutter;
                lastChild = child;
            }
        }
 
        private function doDrawCircle():void {
            var child:Shape = new Shape();
            var halfSize:uint = Math.round(size / 2);
            child.graphics.beginFill(bgColor);
            child.graphics.lineStyle(borderSize, borderColor);
            child.graphics.drawCircle(halfSize, halfSize, halfSize);
            child.graphics.endFill();
            addChild(child);
        }
 
        private function doDrawRoundRect():void {
            var child:Shape = new Shape();
            child.graphics.beginFill(bgColor);
            child.graphics.lineStyle(borderSize, borderColor);
            child.graphics.drawRoundRect(0, 0, size, size, cornerRadius);
            child.graphics.endFill();
            addChild(child);
        }
 
        private function doDrawRect():void {
            var child:Shape = new Shape();
            child.graphics.beginFill(bgColor);
            child.graphics.lineStyle(borderSize, borderColor);
            child.graphics.drawRect(0, 0, size, size);
            child.graphics.endFill();
            addChild(child);
        }
    }
}

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Author Comment

by:chinu1310
ID: 20367422
Hi,

Thanks for that link. Actually I visited that link before. The only question I have is how do I create polygons using this class. I need to create different state's map images using flex. This only does rectangle,roundrect. Thats not what I am looking for.

Thanks
CK
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LVL 19

Expert Comment

by:Gary Benade
ID: 20371549
graphics.beginFill(0xFF0000,0.5);
graphics.moveTo(10,10);
graphics.lineTo(100,50);
graphics.lineTo(100,150);
graphics.lineTo(70,70);
graphics.lineTo(10,10);
graphics.endFill();
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LVL 19

Expert Comment

by:Gary Benade
ID: 20439804
Need any more help on this?
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LVL 14

Author Comment

by:chinu1310
ID: 20452108
Yeah man. Thanks for checking back . The ting I want is i want to create a custom polygon and add and event to that shape and display on the flex application. I did some research how cna i convert the vector grphics to display object but no success.

Can you do something like this for me ?

Thanks for checking back.
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Accepted Solution

by:
Gary Benade earned 500 total points
ID: 20455546

// save as mypolygon.as in a directory called mypolygon
package mypolygon
{
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	import flash.events.Event;
	
	public class mypolygon extends Sprite
	{
		public function mypolygon()
		{
			super();
			draw();
			addEventListener( MouseEvent.CLICK, click);
		}
		private function click( e:MouseEvent):void
		{
			dispatchEvent( new Event('polyClick',true));
		}
		public function draw():void
		{
			this.graphics.beginFill(0xFF0000,0.5);
			this.graphics.moveTo(10,10);
			this.graphics.lineTo(100,50);
			this.graphics.lineTo(100,150);
			this.graphics.lineTo(70,70);
			this.graphics.lineTo(10,10);
			this.graphics.endFill();		
		}
	}
}
 
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()">
	<mx:Script>
		<![CDATA[
			import mypolygon.mypolygon;
			private function init():void
			{			
				addEventListener('polyClick', polyClicked);
				var poly:mypolygon = new mypolygon();
				poly.name = "poly1";
				poly.x = 100;
				poly.y = 100;
				poly.width = 150;
				poly.height = 150;
				rawChildren.addChild( poly);							
				poly = new mypolygon();
				poly.name = "poly2";
				poly.x = 10;
				poly.y = 10;
				poly.width = 150;
				poly.height = 150;
				rawChildren.addChild( poly); 
			}
			private function polyClicked( e:Event):void
			{
				trace( 'poly ' + e.target.name + ' clicked');
			}
		]]>
	</mx:Script>
</mx:Application>

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Expert Comment

by:Gary Benade
ID: 20455555
if you want hollow shapes change the code to:
		public function draw():void
		{
			//this.graphics.beginFill(0xFF0000,0.5);
			this.graphics.lineStyle(10);
			this.graphics.moveTo(10,10);
			this.graphics.lineTo(100,50);
			this.graphics.lineTo(100,150);
			this.graphics.lineTo(70,70);
			this.graphics.lineTo(10,10);
			//this.graphics.endFill();		
		}

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Expert Comment

by:Gary Benade
ID: 20498375
Was that what you were looking for?
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LVL 19

Expert Comment

by:Gary Benade
ID: 21568885
Need any more help on this?
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