Flash/Flex学习笔记(14)：制作涂鸦板

var drawing:Boolean;

Mouse.hide(); //隐藏默认的光标

stage.addEventListener(MouseEvent.MOUSE_MOVE,Stage_MouseMove);
stage.addEventListener(MouseEvent.MOUSE_DOWN,Stage_MouseDown);
stage.addEventListener(MouseEvent.MOUSE_UP,Stage_MouseUp);
stage.addEventListener(KeyboardEvent.KEY_DOWN,Stage_KeyDown);

function Stage_MouseDown(e:MouseEvent):void {
	this.graphics.moveTo(this.mouseX,this.mouseY);//设置划线的起点
	this.graphics.lineStyle(3,0x99cc00,100);//设置笔触大小及颜色
	drawing=true;
}


function Stage_MouseMove(e:MouseEvent):void {
	//铅笔鼠标跟随
	pen1.x=this.mouseX;
	pen1.y=this.mouseY;

	if (drawing) {
		this.graphics.lineTo(this.mouseX,this.mouseY);//关键代码就在这里
	}
	e.updateAfterEvent();
}

function Stage_MouseUp(e:MouseEvent):void {
	drawing=false;
}

function Stage_KeyDown(e:KeyboardEvent):void {
	if (e.keyCode==Keyboard.DELETE) { //注意这里：虽然代码只写了Delete键，但实际测试中发现如果按Ctrl + Delete组合键，也能触发
		this.graphics.clear();
	}
}