[gimpwin-dev] button_press_event & gdk_pointer_is_grabbed()

[Tor Lillqvist <tml iki fi>]

hermanator12002 writes:
 > I noticed that doing a gdk_pointer_is_grabbed() in a 
 > button_press_event callback on linux produces FALSE while on win32 
 > TRUE.

Is this a major issue for you?

 > Looking at the win32 source code I see that a gdk_pointer_grab 
 > is done in gdkevents-win32.c, under the comment /* Emulate X11's 
 > automatic active grab */.  What is automatic active grab, 

Read the X11 protocol or libX11 spec...

 > and why is the pointer not automatically grabbed in the X11 code?

it most probably is, but gdk_pointer_is_grabbed() only checks for
explicit grabs. The docs for gdk_pointer_is_grabbed() says: "Note that
this does not take the inmplicit pointer grab on button presses into
account."

The Win32 version of gdk_pointer_is_grabbed() probably should do the
same, for compatibility? I.e. one would need to add a global flag to
gdk-win32 indicating whether a pointer grab is explicit or (emulated)
implicit, and gdk_pointer_is_grabbed() would return TRUE only if an
explicit grab is active.

--tml