Question

I have a WPF Canvas with .NET-4.5.

I added events (which autocreated methods for) MouseLeftButtonDown and MouseDown. Using MessageBox, I have confirmed these methods are called when a user clicks on the canvas, but I can’t find a way to get the mouse position from MouseButtonEventArgs.

When I added events (and autocreated methods for) ManipulationStarted and ManipulationStarting those MessageBoxes don’t show up.

private void CenterCanvas_ManipulationStarted(object sender, ManipulationStartedEventArgs e)
{
        MessageBox.Show("Doesn't show up");   // never shows up
}

private void CenterCanvas_MouseDown(object sender, MouseButtonEventArgs e)
{
        MessageBox.Show("Shows up");   // shows up, but can't seem to get click position
}

Answer 1

In order to get the mouse position from a MouseEventArgs you would have to call the GetPosition method.

private void Canvas_MouseDown(object sender, MouseButtonEventArgs e)
{
    var pos = e.GetPosition((IInputElement)sender);

    System.Diagnostics.Trace.TraceInformation("MouseDown at {0}", pos);
}

For getting manipulation events you need to set IsManipulationEnabled to true. You may want to take a look at the Touch and Manipulation section in the MSDN Input Overview.