'Best way to determine if a user can view a window

How can I determine if a user can see a window (fully or partially) at the screen using WPF/C#?

I tried to define this using WindowState, but the window may be “under” other windows.

For example now the window are focused and user can view it:

Fully visible window

Now part of window are covered with IDE, but user still can view it:

Partially visible window

Now the window is completely covered by the IDE window, and the user cannot see it.

No visible window

How can I now determine in what "visible state" the window is?

c++sharpwpfwindowsmvvm


Solution 1:[1]

You could do a "hit test" on the 4 corners coordinates and if all tests return your window then the window is completely visible.

  • see also: VisualTreeHelper.HitTest function
  • see also: WindowFromPoint function (user32.dll)

Solution 2:[2]

You can track when your application active(or focused) but I am not sure is it possible with a partially visible window, in any case, read this, hope it will be helpful.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 kux
Solution 2 STG

Related Questions