def set_pixmap():
# The tricky part here is that the pixmap returned by
# NameWindowPixmap gets invalidated every time the window's
# viewable state changes. ("viewable" here is the X term that
# means "mapped, and all ancestors are also mapped".) But
# there is no X event that will tell you when a window's
# viewability changes! Instead we have to find all ancestors,
# and watch all of them for unmap and reparent events. But
# what about races? I hear you cry. By doing things in the
# exact order:
# 1) select for StructureNotify
# 2) QueryTree to get parent
# 3) repeat 1 & 2 up to the root
# 4) call NameWindowPixmap
# we are safe. (I think.)
listening = []
win = get_parent(self._window)
while win is not None and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
addXSelectInput(win, const["StructureNotifyMask"])
add_event_receiver(win, self)
listening.append(win)
win = get_parent(win)
handle = xcomposite_name_window_pixmap(self._window)
self._contents_handle = handle
# Don't save the listening set until after NameWindowPixmap
# has succeeded, to maintain our invariant:
self._listening_to = listening
def test_select_clientmessage_and_xselectinput(self):
self.evs = []
self.w = self.window()
gtk.gdk.flush()
l.add_event_receiver(self.w, self)
l.add_event_receiver(self.root(), self)
data = (0x01020304, 0x05060708, 0x090a0b0c, 0x0d0e0f10, 0x11121314)
l.sendClientMessage(self.root(), False, 0, "NOMASK", *data)
l.sendClientMessage(self.w, False, 0, "NOMASK", *data)
gtk.main()
# Should have gotten message to w, not to root
assert len(self.evs) == 1
ev = self.evs[0]
assert ev.window is self.w
assert ev.message_type == "NOMASK"
assert ev.format == 32
assert ev.data == data
self.evs = []
l.sendClientMessage(self.root(), False, l.const["Button1MotionMask"],
"BAD", *data)
l.addXSelectInput(self.root(), l.const["Button1MotionMask"])
l.sendClientMessage(self.root(), False, l.const["Button1MotionMask"],
"GOOD", *data)
gtk.main()
assert len(self.evs) == 1
ev = self.evs[0]
assert ev.window is self.root()
assert ev.message_type == "GOOD"
assert ev.format == 32
assert ev.data == data
def set_pixmap():
# The tricky part here is that the pixmap returned by
# NameWindowPixmap gets invalidated every time the window's
# viewable state changes. ("viewable" here is the X term that
# means "mapped, and all ancestors are also mapped".) But
# there is no X event that will tell you when a window's
# viewability changes! Instead we have to find all ancestors,
# and watch all of them for unmap and reparent events. But
# what about races? I hear you cry. By doing things in the
# exact order:
# 1) select for StructureNotify
# 2) QueryTree to get parent
# 3) repeat 1 & 2 up to the root
# 4) call NameWindowPixmap
# we are safe. (I think.)
listening = []
try:
win = get_parent(self._window)
while win is not None and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
addXSelectInput(win, const["StructureNotifyMask"])
add_event_receiver(win, self)
listening.append(win)
win = get_parent(win)
handle = xcomposite_name_window_pixmap(self._window)
except:
try:
self._cleanup_listening(listening)
except:
pass
raise
if handle is None:
log.warn(
"failed to name a window pixmap (expect an X error soon)",
type="pixmap")
self._cleanup_listening(listening)
else:
self._contents_handle = handle
# Don't save the listening set until after
# NameWindowPixmap has succeeded, to maintain our
# invariant:
self._listening_to = listening
