nanogui: Re: about Windows redraw
Subject:
Re: [nanogui] Fw: about Windows redraw
From:
"Greg Haerr" ####@####.####
Date:
17 Nov 2002 01:02:16 -0000
Message-Id: <09d301c28dd3$98111f30$6401a8c0@gregnewport>
: If you are using nanowm ,you will see clearly
that the window is redraw for the second time when
be creted. first for the event GR_UPDATE_MAP,and
later for the event GR_EVENT_TYPE_EXPOSURE,the first
event is responded by the child window,and trigger
the EXPOSURE event ,nanomw get the event ,and draw
the container, because the original window is children
of the container ,so it should be redraw for the
second time.
This is correct. However, the proper fix for
this is to re-design the way that the window
manager receives notification about windows
mapping on the root window for the first time.
My plan is implement an X11-style solution, where
the original map from the application is not
executed, and instead a CHILD_REDIRECT event
is sent to the window manager. The window manager
then creates the container window, reparents
the application window to it, and then maps
the application window on behalf of the application.
This would result in only a single expose/update event.
Regards,
Greg
