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bar.py
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bar.py
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# Copyright (c) 2008, Aldo Cortesi. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import command
import confreader
import drawer
import hook
import manager
import window
class Gap(command.CommandObject):
"""
A gap, placed along one of the edges of the screen. If a gap has been
defined, Qtile will avoid covering it with windows. The most probable
reason for configuring a gap is to make space for a third-party bar or
other static window.
"""
def __init__(self, size):
"""
size: The width of the gap.
"""
self.size = size
self.qtile, self.screen = None, None
def _configure(self, qtile, screen):
self.qtile, self.screen = qtile, screen
def draw(self):
pass
@property
def x(self):
s = self.screen
if s.right is self:
return s.dx + s.dwidth
else:
return s.x
@property
def y(self):
s = self.screen
if s.top is self:
return s.y
elif s.bottom is self:
return s.dy + s.dheight
elif s.left is self:
return s.dy
elif s.right is self:
return s.y + s.dy
@property
def width(self):
s = self.screen
if self in [s.top, s.bottom]:
return s.width
else:
return self.size
@property
def height(self):
s = self.screen
if self in [s.top, s.bottom]:
return self.size
else:
return s.dheight
def geometry(self):
return self.x, self.y, self.width, self.height
def _items(self, name):
if name == "screen":
return True, None
def _select(self, name, sel):
if name == "screen":
return self.screen
@property
def position(self):
for i in ["top", "bottom", "left", "right"]:
if getattr(self.screen, i) is self:
return i
def info(self):
return dict(
position=self.position
)
def cmd_info(self):
"""
Info for this object.
"""
return self.info()
class Obj:
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
def __repr__(self):
return self.name
STRETCH = Obj("STRETCH")
CALCULATED = Obj("CALCULATED")
STATIC = Obj("STATIC")
class Bar(Gap):
"""
A bar, which can contain widgets. Note that bars can only be placed at
the top or bottom of the screen.
"""
defaults = manager.Defaults(
("background", "#000000", "Background colour."),
("opacity", 1, "Bar window opacity.")
)
def __init__(self, widgets, size, **config):
"""
- widgets: A list of widget objects.
- size: The height of the bar.
"""
Gap.__init__(self, size)
self.widgets = widgets
self.defaults.load(self, config)
self.saved_focus = None
def _configure(self, qtile, screen):
if not self in [screen.top, screen.bottom]:
raise confreader.ConfigError(
"Bars must be at the top or the bottom of the screen."
)
if len(filter(lambda w: w.width_type == STRETCH, self.widgets)) > 1:
raise confreader.ConfigError("Only one STRETCH widget allowed!")
Gap._configure(self, qtile, screen)
self.window = window.Internal.create(
self.qtile,
self.x, self.y, self.width, self.height,
self.opacity
)
self.drawer = drawer.Drawer(
self.qtile,
self.window.window.wid,
self.width,
self.height
)
self.drawer.clear(self.background)
self.window.handle_Expose = self.handle_Expose
self.window.handle_ButtonPress = self.handle_ButtonPress
self.window.handle_ButtonRelease = self.handle_ButtonRelease
qtile.windowMap[self.window.window.wid] = self.window
self.window.unhide()
for i in self.widgets:
qtile.registerWidget(i)
i._configure(qtile, self)
# FIXME: These should be targeted better.
hook.subscribe.setgroup(self.draw)
hook.subscribe.changegroup(self.draw)
def _resize(self, width, widgets):
stretches = [i for i in widgets if i.width_type == STRETCH]
if stretches:
stretchspace = width - sum(
[i.width for i in widgets if i.width_type != STRETCH])
stretchspace = max(stretchspace, 0)
astretch = stretchspace / len(stretches)
for i in stretches:
i.width = astretch
if astretch:
i.width += stretchspace % astretch
offset = 0
for i in widgets:
i.offset = offset
offset += i.width
def handle_Expose(self, e):
self.draw()
def get_widget_in_position(self, e):
for i in self.widgets:
if e.event_x < i.offset + i.width:
return i
def handle_ButtonPress(self, e):
widget = self.get_widget_in_position(e)
if widget:
widget.button_press(e.event_x - widget.offset,
e.event_y, e.detail)
def handle_ButtonRelease(self, e):
widget = self.get_widget_in_position(e)
if widget:
widget.button_release(e.event_x - widget.offset,
e.event_y, e.detail)
def widget_grab_keyboard(self, widget):
"""
A widget can call this method to grab the keyboard focus
and receive keyboard messages. When done,
widget_ungrab_keyboard() must be called.
"""
self.window.handle_KeyPress = widget.handle_KeyPress
self.saved_focus = self.qtile.currentWindow
self.window.window.set_input_focus()
def widget_ungrab_keyboard(self):
"""
Removes the widget's keyboard handler.
"""
del self.window.handle_KeyPress
if not self.saved_focus == None:
self.saved_focus.window.set_input_focus()
def draw(self):
self._resize(self.width, self.widgets)
for i in self.widgets:
i.draw()
if self.widgets:
end = i.offset + i.width
if end < self.width:
self.drawer.draw(end, self.width - end)
def info(self):
return dict(
width=self.width,
position=self.position,
widgets=[i.info() for i in self.widgets],
window=self.window.window.wid
)
def cmd_fake_button_press(self, screen, position, x, y, button=1):
"""
Fake a mouse-button-press on the bar. Co-ordinates are relative
to the top-left corner of the bar.
:screen The integer screen offset
:position One of "top", "bottom", "left", or "right"
"""
class _fake:
pass
fake = _fake()
fake.event_x = x
fake.event_y = y
fake.detail = button
self.handle_ButtonPress(fake)