Hi:
I am trying to use the gdk_grab_keyboard function to grab the keyboard and
simulate key events for the system. I wrote a skeleton application to test
the behavior and scope of the grab. I have written similar applcation in
Xlib.
The basic thing the program does is open a top level window and give it the
keypressed signal handling capability. then the application, upon, expose
grabs the key pressed. All future key pressed events must reach the
keypressed signal handler (I thought). Here is what happens.
1. If I use
gdk_keyboard_grab(app->window,TRUE,GDK_CURRENT_TIME);
the keyboard is grabbed and all events are sent to it. Event when the focus
is on other windows. BUT when I minimize the window or switch to another
virtual desktop the keybaord grab is lost. I have found this not to be the
case with Xlib.
2. If I use
gdk_keyboard_grab(GDK_ROOT_WINDOW(),
TRUE,
GDK_CURRENT_TIME);
I get an error. what excatly does GDK_ROOT_WINDOW() return: an XWindow
object or a GDK_WINDOW object?
3. finally when I use the XGrabKeyboard function (from Xlib), the keybaord
is grabbed but no application responds to it. This grab is
XGrabKeyboard(GDK_DISPLAY(), root_window, False,
GrabModeAsync, GrabModeAsync, CurrentTime);
This same function works in an Xlib app.
what is going on here? ANy insight/knowledge would be greatly appreciated.
Thanks in advance.
-D
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