Source code for libqtile.widget.volume

import os
import re
import subprocess

import cairocffi

from . import base
from .. import bar
from six import u

__all__ = [
    'Volume',
]

re_vol = re.compile('\[(\d?\d?\d?)%\]')


[docs]class Volume(base._TextBox): ''' Widget that display and change volume if theme_path is set it draw widget as icons ''' defaults = [ ("cardid", 0, "Card Id"), ("channel", "Master", "Channel"), ("padding", 3, "Padding left and right. Calculated if None."), ("theme_path", None, "Path of the icons"), ("update_interval", 0.2, "Update time in seconds."), ("emoji", False, "Use emoji to display volume states, only if ``theme_path`` is not set." "The specified font needs to contain the correct unicode characters."), ("mute_command", None, "Mute command"), ("volume_up_command", None, "Volume up command"), ("volume_down_command", None, "Volume down command"), ] def __init__(self, **config): base._TextBox.__init__(self, '0', width=bar.CALCULATED, **config) self.add_defaults(Volume.defaults) if self.theme_path: self.width_type = bar.STATIC self.width = 0 self.surfaces = {} self.volume = None def timer_setup(self): self.timeout_add(self.update_interval, self.update) if self.theme_path: self.setup_images() def button_press(self, x, y, button): if button == 5: if self.volume_down_command is not None: subprocess.call(self.volume_down_command) else: subprocess.call([ 'amixer', '-q', '-c', str(self.cardid), 'sset', self.channel, '2dB-' ]) elif button == 4: if self.volume_up_command is not None: subprocess.call(self.volume_up_command) else: subprocess.call([ 'amixer', '-q', '-c', str(self.cardid), 'sset', self.channel, '2dB+' ]) elif button == 1: if self.mute_command is not None: subprocess.call(self.mute_command) else: subprocess.call([ 'amixer', '-q', '-c', str(self.cardid), 'sset', self.channel, 'toggle' ]) self.draw() def update(self): vol = self.get_volume() if vol != self.volume: self.volume = vol # Update the underlying canvas size before actually attempting # to figure out how big it is and draw it. self._update_drawer() self.bar.draw() self.timeout_add(self.update_interval, self.update) def _update_drawer(self): if self.theme_path: self.drawer.clear(self.background or self.bar.background) if self.volume <= 0: img_name = 'audio-volume-muted' elif self.volume <= 30: img_name = 'audio-volume-low' elif self.volume < 80: img_name = 'audio-volume-medium' elif self.volume >= 80: img_name = 'audio-volume-high' self.drawer.ctx.set_source(self.surfaces[img_name]) self.drawer.ctx.paint() elif self.emoji: if self.volume <= 0: self.text = u('\U0001f507') elif self.volume <= 30: self.text = u('\U0001f508') elif self.volume < 80: self.text = u('\U0001f509') elif self.volume >= 80: self.text = u('\U0001f50a') else: if self.volume == -1: self.text = 'M' else: self.text = '%s%%' % self.volume def setup_images(self): for img_name in ( 'audio-volume-high', 'audio-volume-low', 'audio-volume-medium', 'audio-volume-muted' ): try: img = cairocffi.ImageSurface.create_from_png( os.path.join(self.theme_path, '%s.png' % img_name) ) except cairocffi.Error: self.theme_path = None self.width_type = bar.CALCULATED self.qtile.log.exception('Volume switching to text mode') return input_width = img.get_width() input_height = img.get_height() sp = input_height / float(self.bar.height - 1) width = input_width / sp if width > self.width: self.width = int(width) + self.actual_padding * 2 imgpat = cairocffi.SurfacePattern(img) scaler = cairocffi.Matrix() scaler.scale(sp, sp) scaler.translate(self.actual_padding * -1, 0) imgpat.set_matrix(scaler) imgpat.set_filter(cairocffi.FILTER_BEST) self.surfaces[img_name] = imgpat def get_volume(self): mixerprocess = subprocess.Popen( [ 'amixer', '-c', str(self.cardid), 'sget', self.channel ], stdout=subprocess.PIPE ) mixer_out = mixerprocess.communicate()[0].decode() if mixerprocess.returncode: return -1 if '[off]' in mixer_out: return -1 volgroups = re_vol.search(mixer_out) if volgroups: return int(volgroups.groups()[0]) else: # this shouldn't happend return -1 def draw(self): if self.theme_path: self.drawer.draw(self.offset, self.width) else: base._TextBox.draw(self)