I'm trying to write a presentation graphics thingy. I need to be able
to create an undecorated window the size of the full screen and stick a
gnomecanvas in it. I've found _create_window with the
'override_redirect' option, but I can't get the canvas to show up. The
code I've got so far is:
---------------
from gtk import *
from gnome.ui import *
import GDK
from gtk import _root_window, _window_new
rw = _root_window()
w = rw.width
h = rw.height
c = GnomeCanvas()
cm = c.get_colormap()
c.connect('button_press_event', mainquit)
c.set_usize(w/2, h/2)
c.set_scroll_region(0,0,w/2,h/2)
win = _window_new(None, {'window_type' : GDK.WINDOW_TOPLEVEL,
'event_mask' : GDK.ALL_EVENTS_MASK,
'width' : w/2, 'height' : h/2,
'wmclass' : GDK.INPUT_OUTPUT,
'x' : 0, 'y' : 0, 'colormap' : cm,
'override_redirect' : 1})
c.set_parent_window(win)
root = c.root()
i = root.add('rect', x1=5, y1=5, x2=450, y2=400,
fill_color=cm.alloc("blue"))
i.show()
i.raise_to_top()
i.move(15, 15)
c.show_all()
win.show()
mainloop()
-----------
With this code I get a black rectangle in the upper left hand corner of
the screen (I'm only doing half the screen now so I can get to an xterm
and kill the app). The rectangle obeys override_redirect; if it is true
-> no decorations or WM control, if not I get a titlebar and can move
the window. Confusingly (to me at least), omitting the
c.set_parent_window command seems to have no effect; I get the black
rectangle (with or without a title per override_redirect) whether it is
there or not.
Any explanations, suggestions, or ideas would be appreciated.
Jay
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