How to send click signal to a XYSeries under a MouseArea

[qtLove]

Hi

I am trying to catch the event when user click on a SplineSeries which there is a MouseArea above it ( on the Plot)
The line can not detect clicked signal , even if I set the propagateComposedEvents to true in MouseArea and I set the mouse.accepted to false in onClicked in the MouseArea.

My code as below

Plot.qml

Item
{ 
id:root
   function addLine(name)
    {
        var line = chart.createSeries(ChartView.SeriesTypeSpline , name, chart.xAxis, chart.yAxis)
        line.clicked.connect( clickLine)
        line.useOpenGL = true      
        return line
    }
   function clickLine()
   {  
     console.log(  "click Line")
    }
    ChartView
    { 
          id:chart

     }

}

====================
main.qml

Plot{
     MouseArea
     {
         anchor.fill :parent
         propagateComposedEvents : true

          onClicked:  mouse.accepted=false
     }

}