kall@mayo.EDU (Bruce Kall) (04/02/91)
I am having a problem receiving Expose/VisibilityNotify events until (it seems)
I perform the next CreateSimpleWindow call (I'm not sure if its the call to
XCreateSimpleWindow or the XMapraised that causes the Expose/VisibilityNotify
events to eventually come out).
My main window fills the entire screen. I have three sibing windows, one on
the left, one in the middle and one on the right. The middle and right windows
area created with XCreateSimpleWindow. The left window is created with
XCreateWindow with the following arguments:
attributes.background_pixmap = None;
attributes.border_pixmap = None;
attributes.border_pixel = CopyFromParent;
attributes.bit_gravity = NorthWestGravity;
attributes.win_gravity = NotUseful;
attributes.backing_store = NotUseful;
attributes.backing_pixel = 0;
attributes.save_under = False;
attributes.event_mask = ExposureMask | VisibilityChangeMask;
attributes.do_not_propagate_mask = 0;
attributes.override_redirect = False;
attributes.colormap = CopyFromParent;
attributes.cursor = None;
value_mask = CWBackPixmap | CWBorderPixmap;
*window_ptr = XCreateWindow(the_display,main_window,window_x,window_y,
window_width,window_height,0, XDefaultDepth(the_display, myscreen),
InputOutput,DefaultVisual(the_display, myscreen),value_mask,
&attributes);
XSelectInput(the_display,*window_ptr,
ButtonPressMask | ButtonReleaseMask | OwnerGrabButtonMask |
EnterWindowMask | LeaveWindowMask | ExposureMask);
If the left window partially covers the left window and I then XDestroyWindow
it,
I don't receive the Expose/VisibilityNotify event on the middle window until
the next time I create and map a window.
I have tried: XFlush and XSync right after I XDestroy the left window to no
avail.
If I run my program that makes the left window partially obscure the middle
window and
XDestroy the left window and then exit the program before ever creating another
window,
I NEVER get the Expose/VisibilityNotify events at all!
I also have a similar problem with another window that I create that partially
obscures both
the middle and right windows (this window is created with XCreateSimpleWindow
--
so this causes me to think the problem is not with the use of XCreateWindow).
When I XDestroy this window I only get an Expose on the right window, but not
on the left
(until I XCreate the next one).
Any suggestions?? (Note: I do eventually receive the correct Expose events.)
\------------------------------------------------------------\
\ Bruce Kall \ Internet: Kall@Mayo.edu \
\ Mayo Clinic (Foundation) \ Phone: (507)-255-4768 \
\ Rochester, MN 55905 \ \
\------------------------------------------------------------\