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Matthew
120
How to get the pixel coordinates of a SymbolElement?
posted

After adding a SymbolElement to a layer, I'd like to determine the on-screen location of that symbol so that I can draw a line to it from a callout displayed near the map.  Is there a way to convert an origin to pixel coordinates that are relative to the viewport?

Thanks in advance!

  • 120
    Suggested Answer
    posted

    I came up with this solution, which meets my needs (given the location of SymbolElement as "origin"):

    Dim pixelX As Integer = CInt((((origin.X - Map1.WindowRect.Left) / (Map1.WindowRect.Right - Map1.WindowRect.Left)) * ((Map1.Margin.Left + Map1.ActualWidth) - Map1.Margin.Left)) + Map1.Margin.Left)
    Dim pixelY As Integer = CInt((((origin.Y - Map1.WindowRect.Top) / (Map1.WindowRect.Bottom - Map1.WindowRect.Top)) * ((Map1.Margin.Top + Map1.ActualHeight) - Map1.Margin.Top)) + Map1.Margin.Top)