Android Question Panel_Touch for drawing a Line?

[JohnD]

I was trying to create a dynamic line on Erel's Graph1 sample program using Panel_Touch and cvsGraph.Drawline. The cvsGraph.Drawline is getting fired, but no line is being drawn - that I can see. Do I need a more elegant solution or am I on the right track? Thanks, JD.

Sub pnlGraph_Touch (Action As Int, X As Float, Y As Float)

If Action = pnlGraph.ACTION_DOWN Then
    If fx0 = 0 AND fy0 = 0 Then
        fx0 = X
        fy0 = Y
    Else
        cvsGraph.DrawLine(fx0, fy0, X, Y, CurveLineColor(0), 1)
        fx0 = 0
        fy0 = 0
    End If

End If

 

[klaus]

You need to Invalidate the view you draw on.

 

[JohnD]

Worked. Thanks Klaus.