wpf graph detect mouse on axis

[eugenem]

How do I get events for mouse interaction with axes? With WF graphs I used following code:

switch (graph.HitTest(e.X, e.Y))
{
case XYGraphHitTestInfo.XAxis:

etc...

[phansen · Accepted solution]

You can use the GetScaleAt method to detect a scale at a given mouse position (GetChildrenAtPoint should return scales as well, but this is not working in the current release).

Here is an example of using GetScaleAt in the MouseLeftButtonDown event on a graph (note that the graph needs to have a hit-testable background like Transparent, instead of the default value of null, or else only clicks exactly on visuals in the scale will work):

    private void OnGraphMouseLeftButtonDown( object sender, MouseButtonEventArgs e ) {
        Point screenPosition = e.GetPosition( graph );
        var scale = graph.GetScaleAt( screenPosition );
        Console.WriteLine( "Scale at {0}? {1}", screenPosition, scale == null ? "no" : "yes" );
    }

[phansen]

Just wanted to let you know this issue was fixed in the Measurement Studio 2013 release.