Whether the application is active?

["aniket ray" <aniket ray gmail com>]

Hi,
Is there a way to find out if the current application is the active
application (has user-focus) or not?

I have a gtk application with multiple windows and if any among the windows
has focus then I want a variable (let's say boolean isActive) to be set as
true.
I tried changing the value of isActive based on focus-in and focus-out
events of each of the windows. But then, if I switch from one window of the
app to another, the variable is becoming false for a period of time (albeit
a small one).

Any help in this regard is extremely welcome.


Thanks
Aniket Ray