forked from: マウスドラッグでグラデ塗り

Sketchpadのグラデ塗りがかっこよかったので再現
* ドラッグでグラデーションが塗れます。

by qasper 12 Feb 2010

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/**
 * Copyright qasper ( http://wonderfl.net/user/qasper )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/2QI4
 */

// forked from rsakane's マウスドラッグでグラデ塗り
/*
 * Sketchpadのグラデ塗りがかっこよかったので再現
 * ドラッグでグラデーションが塗れます。
 */
package
{
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	import flash.geom.Matrix;
	import flash.geom.Point;
	import com.bit101.components.Window;
	import com.bit101.components.RadioButton;
 
	public class Main extends Sprite
	{
		private var color:Array = [0xFEBF05, 0xFFD65D];
		private var start:Point = new Point();
		private var canvas:Sprite = new Sprite();
		private var drag:Sprite = new Sprite();
		
		public function Main()
		{	
			Wonderfl.capture_delay(15);
			canvas.graphics.beginFill(0xFFFFFF);
			canvas.graphics.drawRect(0, 0, 465, 465);
			canvas.graphics.endFill();
			addChild(canvas);
			
			drag = new Sprite();
			addChild(drag);
			
			var window:Window = new Window(this, 362, 362, "Color");
			var button1:RadioButton = new RadioButton(window.content, 5, 5,  "Yellow",  true, function():void{color = [0xFEBF05, 0xFFD65D]});
			var button2:RadioButton = new RadioButton(window.content, 5, 20, "Blue",   false, function():void{color = [0x80E0F8, 0xCDF8FF]});
			var button3:RadioButton = new RadioButton(window.content, 5, 35, "Red",    false, function():void{color = [0x6D0019, 0xA80329]});
			var button4:RadioButton = new RadioButton(window.content, 5, 50, "Green",  false, function():void{color = [0x7DE31F, 0xC7FE30]});
			var button5:RadioButton = new RadioButton(window.content, 5, 65, "Pear",   false, function():void{color = [0xD1D360, 0xE5E695]});
			
			stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
			stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
		}
		
		private function onMouseDown(event:MouseEvent):void
		{
			start.x = mouseX;
			start.y = mouseY;
			
			drag.graphics.clear();
			drag.graphics.lineStyle(1.0, 0x7F7F7F);
			drag.graphics.beginFill(0xFFFFFF);
			drag.graphics.drawCircle(start.x, start.y, 3);
			drag.graphics.endFill();
			
			stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
		}
		
		private function onMouseMove(event:MouseEvent):void
		{
			drag.graphics.clear();
			
			drag.graphics.lineStyle(1.0, 0x9F9F9F);
			drag.graphics.moveTo(start.x, start.y);
			drag.graphics.lineTo(mouseX, mouseY);
			
			drag.graphics.lineStyle(1.0, 0x7F7F7F);
			drag.graphics.beginFill(0xFFFFFF);
			drag.graphics.drawCircle(start.x, start.y, 3);
			drag.graphics.drawCircle(mouseX, mouseY, 3);
			drag.graphics.endFill();
		}
		
		private function onMouseUp(event:MouseEvent):void
		{
			drag.graphics.clear();
			stage.removeEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
			
			var dist:Number = Math.sqrt(Math.pow(mouseX - start.x, 2) + Math.pow(mouseY - start.y, 2));
			var radian:Number = Math.atan2(mouseY - start.y, mouseX - start.x);
			
			var matrix:Matrix = new Matrix();
			matrix.createGradientBox(1400, 1400, 0, -700, -700);
			canvas.graphics.clear();
			canvas.graphics.beginGradientFill("linear", color, [1.0, 1.0], [127, 128 + dist / 1400 * 255], matrix);
			canvas.graphics.drawRect(-700, -700, 1400, 1400);
			canvas.graphics.endFill();
			canvas.x = start.x;
			canvas.y = start.y;
			canvas.rotation = radian / (Math.PI / 180);
		}
	}
}