flash简单画画actionscript3.0
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as3.0
../drawingapplication.fla
document class设置为ch6.drawingApplication
../ch6/drawingApplication.as
package ch6 {
import flash.display.Sprite;
import flash.events.MouseEvent;
public class DrawingApplication extends Sprite {
private var _canvas:Sprite;
public function DrawingApplication() {
_canvas = new Sprite();
_canvas.graphics.beginFill(0xf0f0f0);
_canvas.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
_canvas.graphics.endFill();
_canvas.graphics.lineStyle(2, 0x000000);
addChild(_canvas);
_canvas.addEventListener(MouseEvent.MOUSE_DOWN, onCanvasMouseDown);
_canvas.addEventListener(MouseEvent.MOUSE_UP, onCanvasMouseUP);
}
private function onCanvasMouseDown(event:MouseEvent): void {
_canvas.graphics.moveTo(event.localX, event.localY);
_canvas.addEventListener(MouseEvent.MOUSE_DOWN, onCanvasMouseMove);
}
private function onCanvasMouseMove(event:MouseEvent):void {
_canvas.graphics.lineTo(event.localX, event.localY);
event.updateAfterEvent();
}
private function onCanvasMouseUP(event:MouseEvent): void {
_canvas.graphics.lineTo(event.localX, event.localY);
_canvas.removeEventListener(MouseEvent.MOUSE_MOVE, onCanvasMouseMove);
}
}
}
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