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#
# opacity.py -- set window opacity based on focus
#
# Copyright (C) 2008 David H. Bronke <whitelynx@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import wmanager, wmevents, cfilter
from Xlib import X, Xatom
# Client mixin
class TransparentClient:
"""Client mixin. Sets opacity according to focus and client filters.
Class members:
opacity_(un)focused_default - sets the default opacity for (un)focused
windows.
opacity_(un)focused_clients - sets the opacity for specific windows,
specified by client filters, depending on focus.
opacity_ignore_clients - client filter which specifies clients to ignore.
These clients will not have the _NET_WM_WINDOW_OPACITY property set.
You can also set a client's opacity directly, using the opacity_set() method.
"""
opacity_focused_default = 1.0
opacity_unfocused_default = 0.7
opacity_focused_clients = ()
opacity_unfocused_clients = ()
opacity_ignore_clients = cfilter.false
def __client_init__(self):
self.opacity_focused = None
self.opacity_unfocused = None
self._NET_WM_WINDOW_OPACITY = self.wm.display.intern_atom(
'_NET_WM_WINDOW_OPACITY'
)
if not self.opacity_ignore_clients(self):
for filter, opacity in self.opacity_focused_clients:
if filter(self):
self.opacity_focused = opacity
break
else:
self.opacity_focused = self.opacity_focused_default
for filter, opacity in self.opacity_unfocused_clients:
if filter(self):
self.opacity_unfocused = opacity
break
else:
self.opacity_unfocused = self.opacity_unfocused_default
if self.focused:
self.opacity_get_focus(None)
else:
self.opacity_lose_focus(None)
# Set up dispatchers for the opacity changes
self.dispatch.add_handler(
wmevents.ClientFocusIn,
self.opacity_get_focus
)
self.dispatch.add_handler(
wmevents.ClientFocusOut,
self.opacity_lose_focus
)
def opacity_get_focus(self, event):
if self.opacity_focused is not None:
self.opacity_set(self.opacity_focused)
def opacity_lose_focus(self, event):
if self.opacity_unfocused is not None:
self.opacity_set(self.opacity_unfocused)
def opacity_set(self, percent):
opacity = int(percent * 0xFFFFFFFF)
w = self.window
while 1:
r = w.query_tree()
if r.parent == r.root:
break
w = r.parent
w.change_property(
self._NET_WM_WINDOW_OPACITY,
Xatom.CARDINAL,
32,
[opacity],
X.PropModeReplace
)
self.wm.display.sync()
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