Qml圆形进度条

使用Qml的Canvas来画圆形

onPaint: {
        var ctx = getContext("2d")
        ctx.clearRect(0,0,width,height)
        ctx.beginPath()
        ctx.strokeStyle = arcBackgroundColor
        ctx.lineWidth = arcWidth
        ctx.arc(width/2,height/2,radius,0,Math.PI*2,anticlockwise)
        ctx.stroke()

        var r = progress*Math.PI/180
        ctx.beginPath()
        ctx.strokeStyle = arcColor
        ctx.lineWidth = arcWidth

        ctx.arc(width/2,height/2,radius,0-90*Math.PI/180,r-90*Math.PI/180,anticlockwise)
        ctx.stroke()
    }

需要完整代码请访问QtQuickExamples