var qcanvas = new Qcanvas(
		{
			id:'qcanvas',
			width:500,
			height:500, 
		});

var rect = qcanvas.qrect.rect({
	start:[160,100],
	width:100,
	height:100,
	borderColor:'red', 
	fillColor:'', 
	// degree:50,
	drag:false 
})		
 
var arc = qcanvas.qarc.arc({
	start:[200,120],
	sAngle:0,
	eAngle:360,
	borderColor:'blue',
	fillColor:'',
	r:10, 
	// drag:'vertical',
	dragRange:[rect.start,[rect.start[0]+rect.width,rect.start[1]+rect.height]]

})

var polygon = qcanvas.qpolygon.polygon({
	r:15,
	num:6,
	start:[180,120],
	opacity:0.4,
	dragRange:[rect.start,[rect.start[0]+rect.width,rect.start[1]+rect.height]]
})