channel.py

   1 # This file is part of jack_mixer
   2 #
   3 # Copyright (C) 2006 Nedko Arnaudov <nedko@arnaudov.name>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; version 2 of the License
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18 import logging
  19
  20 import gi
  21 from gi.repository import Gtk
  22 from gi.repository import Gdk
  23 from gi.repository import GObject
  24
  25 import abspeak
  26 import meter
  27 import slider
  28 from serialization import SerializedObject
  29
  30 try:
  31     import phat
  32 except:
  33     phat = None
  34
  35
  36 log = logging.getLogger(__name__)
  37 button_padding = 1
  38 css = b"""
  39 .top_label {min-width: 100px;}
  40 button {padding: 0px}
  41 """
  42 css_provider = Gtk.CssProvider()
  43 css_provider.load_from_data(css)
  44 context = Gtk.StyleContext()
  45 screen = Gdk.Screen.get_default()
  46 context.add_provider_for_screen(screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
  47
  48
  49 def set_background_color(widget, name, color_string):
  50     css = """
  51     .%s {
  52         background-color: %s
  53     }
  54 """ % (name, color_string)
  55
  56     css_provider = Gtk.CssProvider()
  57     css_provider.load_from_data(css.encode('utf-8'))
  58     context = Gtk.StyleContext()
  59     screen = Gdk.Screen.get_default()
  60     context.add_provider_for_screen(screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
  61
  62     widget_context = widget.get_style_context()
  63     widget_context.add_class(name)
  64
  65
  66 def random_color():
  67     from random import uniform, seed
  68     seed()
  69     return Gdk.RGBA(uniform(0, 1), uniform(0, 1), uniform(0, 1), 1)
  70
  71
  72 class Channel(Gtk.VBox, SerializedObject):
  73     '''Widget with slider and meter used as base class for more specific
  74        channel widgets'''
  75     monitor_button = None
  76     num_instances = 0
  77     def __init__(self, app, name, stereo, value = None):
  78         Gtk.VBox.__init__(self)
  79         self.app = app
  80         self.mixer = app.mixer
  81         self.gui_factory = app.gui_factory
  82         self._channel_name = name
  83         self.stereo = stereo
  84         self.initial_value = value
  85         self.meter_scale = self.gui_factory.get_default_meter_scale()
  86         self.slider_scale = self.gui_factory.get_default_slider_scale()
  87         self.slider_adjustment = slider.AdjustmentdBFS(self.slider_scale, 0.0, 0.02)
  88         self.balance_adjustment = slider.BalanceAdjustment()
  89         self.future_out_mute = None
  90         self.future_volume_midi_cc = None
  91         self.future_balance_midi_cc = None
  92         self.future_mute_midi_cc = None
  93         self.future_solo_midi_cc = None
  94         self.css_name = "css_name_%d" % Channel.num_instances
  95         Channel.num_instances += 1
  96
  97     def get_channel_name(self):
  98         return self._channel_name
  99
 100     label_name = None
 101     channel = None
 102     post_fader_output_channel = None
 103     def set_channel_name(self, name):
 104         self.app.on_channel_rename(self._channel_name, name);
 105         self._channel_name = name
 106         if self.label_name:
 107             self.label_name.set_text(name)
 108         if self.channel:
 109             self.channel.name = name
 110         if self.post_fader_output_channel:
 111             self.post_fader_output_channel.name = "%s Out" % name;
 112     channel_name = property(get_channel_name, set_channel_name)
 113
 114     def realize(self):
 115         log.debug('Realizing channel "%s".', self.channel_name)
 116         if self.future_out_mute != None:
 117             self.channel.out_mute = self.future_out_mute
 118
 119         self.slider_adjustment.connect("volume-changed", self.on_volume_changed)
 120         self.slider_adjustment.connect("volume-changed-from-midi", self.on_volume_changed_from_midi)
 121         self.balance_adjustment.connect("balance-changed", self.on_balance_changed)
 122
 123         self.slider = None
 124         self.create_slider_widget()
 125
 126         if self.stereo:
 127             self.meter = meter.StereoMeterWidget(self.meter_scale)
 128         else:
 129             self.meter = meter.MonoMeterWidget(self.meter_scale)
 130         self.on_vumeter_color_changed(self.gui_factory)
 131
 132         self.meter.set_events(Gdk.EventMask.SCROLL_MASK)
 133
 134         self.gui_factory.connect("default-meter-scale-changed", self.on_default_meter_scale_changed)
 135         self.gui_factory.connect("default-slider-scale-changed", self.on_default_slider_scale_changed)
 136         self.gui_factory.connect('vumeter-color-changed', self.on_vumeter_color_changed)
 137         self.gui_factory.connect('vumeter-color-scheme-changed', self.on_vumeter_color_changed)
 138         self.gui_factory.connect('use-custom-widgets-changed', self.on_custom_widgets_changed)
 139
 140         self.abspeak = abspeak.AbspeakWidget()
 141         self.abspeak.connect("reset", self.on_abspeak_reset)
 142         self.abspeak.connect("volume-adjust", self.on_abspeak_adjust)
 143
 144         self.volume_digits = Gtk.Entry()
 145         self.volume_digits.set_property('xalign', 0.5)
 146         self.volume_digits.connect("key-press-event", self.on_volume_digits_key_pressed)
 147         self.volume_digits.connect("focus-out-event", self.on_volume_digits_focus_out)
 148
 149         if self.initial_value != None:
 150             if self.initial_value == True:
 151                 self.slider_adjustment.set_value(0)
 152             else:
 153                 self.slider_adjustment.set_value_db(0)
 154
 155         self.connect("key-press-event", self.on_key_pressed)
 156         self.connect("scroll-event", self.on_scroll)
 157
 158     def unrealize(self):
 159         log.debug('Unrealizing channel "%s".', self.channel_name)
 160         pass
 161
 162     def balance_preferred_width(self):
 163         return (20, 20)
 164
 165     def _preferred_height(self):
 166         return (0, 100)
 167
 168     def create_balance_widget(self):
 169         if self.gui_factory.use_custom_widgets and phat:
 170             self.balance = phat.HFanSlider()
 171             self.balance.set_default_value(0)
 172             self.balance.set_adjustment(self.balance_adjustment)
 173         else:
 174             self.balance = Gtk.Scale()
 175             self.balance.get_preferred_width = self.balance_preferred_width
 176             self.balance.get_preferred_height = self._preferred_height
 177             self.balance.set_orientation(Gtk.Orientation.HORIZONTAL)
 178             self.balance.set_adjustment(self.balance_adjustment)
 179             self.balance.set_has_origin(False)
 180             self.balance.set_draw_value(False)
 181             self.balance.button_down = False
 182             self.balance.connect('button-press-event', self.on_balance_button_press_event)
 183             self.balance.connect('button-release-event', self.on_balance_button_release_event)
 184             self.balance.connect("motion-notify-event", self.on_balance_motion_notify_event)
 185             self.balance.connect("scroll-event", self.on_balance_scroll_event)
 186
 187
 188         self.pack_start(self.balance, False, True, 0)
 189         if self.monitor_button:
 190             self.reorder_child(self.monitor_button, -1)
 191         self.balance.show()
 192
 193     def on_balance_button_press_event(self, widget, event):
 194         if event.button == 1 and event.type == Gdk.EventType.BUTTON_PRESS:
 195             self.balance.button_down = True
 196             self.balance.button_down_x = event.x
 197             self.balance.button_down_value = self.balance.get_value()
 198             return True
 199         if event.button == 1 and event.type == Gdk.EventType._2BUTTON_PRESS:
 200             self.balance_adjustment.set_balance(0)
 201             return True
 202         return False
 203
 204     def on_balance_button_release_event(self, widget, event):
 205         self.balance.button_down = False
 206         return False
 207
 208     def on_balance_motion_notify_event(self, widget, event):
 209         slider_length = widget.get_allocation().width - widget.get_style_context().get_property('min-width', Gtk.StateFlags.NORMAL)
 210         if self.balance.button_down:
 211             delta_x = (event.x - self.balance.button_down_x) / slider_length
 212             x = self.balance.button_down_value + 2 * delta_x
 213             if x >= 1:
 214                 x = 1
 215             elif x <= -1:
 216                 x = -1
 217             self.balance_adjustment.set_balance(x)
 218             return True
 219
 220     def on_balance_scroll_event(self, widget, event):
 221         bal = self.balance
 222         delta = bal.get_adjustment().get_step_increment()
 223         value = bal.get_value()
 224         if event.direction == Gdk.ScrollDirection.UP:
 225             x = value - delta
 226         elif event.direction == Gdk.ScrollDirection.DOWN:
 227             x = value + delta
 228         elif event.direction == Gdk.ScrollDirection.SMOOTH:
 229             x = value - event.delta_y * delta
 230
 231         if x >= 1:
 232             x = 1
 233         elif x <= -1:
 234             x = -1
 235         bal.set_value(x)
 236         return True
 237
 238     def create_slider_widget(self):
 239         parent = None
 240         if self.slider:
 241             parent = self.slider.get_parent()
 242             self.slider.destroy()
 243         if self.gui_factory.use_custom_widgets:
 244             self.slider = slider.CustomSliderWidget(self.slider_adjustment)
 245         else:
 246             self.slider = slider.GtkSlider(self.slider_adjustment)
 247         if parent:
 248             parent.pack_start(self.slider, True, True, 0)
 249             parent.reorder_child(self.slider, 0)
 250         self.slider.show()
 251
 252     def on_default_meter_scale_changed(self, gui_factory, scale):
 253         log.debug("Default meter scale change detected.")
 254         self.meter.set_scale(scale)
 255
 256     def on_default_slider_scale_changed(self, gui_factory, scale):
 257         log.debug("Default slider scale change detected.")
 258         self.slider_scale = scale
 259         self.slider_adjustment.set_scale(scale)
 260         if self.channel:
 261             self.channel.midi_scale = self.slider_scale.scale
 262
 263     def on_vumeter_color_changed(self, gui_factory, *args):
 264         color = gui_factory.get_vumeter_color()
 265         color_scheme = gui_factory.get_vumeter_color_scheme()
 266         if color_scheme != 'solid':
 267             self.meter.set_color(None)
 268         else:
 269             self.meter.set_color(Gdk.color_parse(color))
 270
 271     def on_custom_widgets_changed(self, gui_factory, value):
 272         self.balance.destroy()
 273         self.create_balance_widget()
 274         self.create_slider_widget()
 275
 276     def on_abspeak_adjust(self, abspeak, adjust):
 277         log.debug("abspeak adjust %f", adjust)
 278         self.slider_adjustment.set_value_db(self.slider_adjustment.get_value_db() + adjust)
 279         self.channel.abspeak = None
 280         #self.update_volume(False)   # We want to update gui even if actual decibels have not changed (scale wrap for example)
 281
 282     def on_abspeak_reset(self, abspeak):
 283         log.debug("abspeak reset")
 284         self.channel.abspeak = None
 285
 286     def on_volume_digits_key_pressed(self, widget, event):
 287         if (event.keyval == Gdk.KEY_Return or event.keyval == Gdk.KEY_KP_Enter):
 288             db_text = self.volume_digits.get_text()
 289             try:
 290                 db = float(db_text)
 291                 log.debug('Volume digits confirmation "%f dBFS".', db)
 292             except (ValueError) as e:
 293                 log.debug("Volume digits confirmation ignore, reset to current.")
 294                 self.update_volume(False)
 295                 return
 296             self.slider_adjustment.set_value_db(db)
 297             #self.grab_focus()
 298             #self.update_volume(False)   # We want to update gui even if actual decibels have not changed (scale wrap for example)
 299
 300     def on_volume_digits_focus_out(self, widget, event):
 301         log.debug("Volume digits focus out detected.")
 302         self.update_volume(False)
 303
 304     def read_meter(self):
 305         if not self.channel:
 306             return
 307         if self.stereo:
 308             meter_left, meter_right = self.channel.meter
 309             self.meter.set_values(meter_left, meter_right)
 310         else:
 311             self.meter.set_value(self.channel.meter[0])
 312
 313         self.abspeak.set_peak(self.channel.abspeak)
 314
 315     def on_scroll(self, widget, event):
 316         if event.direction == Gdk.ScrollDirection.DOWN:
 317             self.slider_adjustment.step_down()
 318         elif event.direction == Gdk.ScrollDirection.UP:
 319             self.slider_adjustment.step_up()
 320         return True
 321
 322     def update_volume(self, update_engine, from_midi = False):
 323         db = self.slider_adjustment.get_value_db()
 324
 325         db_text = "%.2f" % db
 326         self.volume_digits.set_text(db_text)
 327
 328         if update_engine:
 329             if not from_midi:
 330                 self.channel.volume = db
 331             self.app.update_monitor(self)
 332
 333     def on_volume_changed(self, adjustment):
 334         self.update_volume(True)
 335
 336     def on_volume_changed_from_midi(self, adjustment):
 337         self.update_volume(True, from_midi = True)
 338
 339     def on_balance_changed(self, adjustment):
 340         balance = self.balance_adjustment.get_value()
 341         log.debug("%s balance: %f", self.channel_name, balance)
 342         self.channel.balance = balance
 343         self.app.update_monitor(self)
 344
 345     def on_key_pressed(self, widget, event):
 346         if (event.keyval == Gdk.KEY_Up):
 347             log.debug(self.channel_name + " Up")
 348             self.slider_adjustment.step_up()
 349             return True
 350         elif (event.keyval == Gdk.KEY_Down):
 351             log.debug(self.channel_name + " Down")
 352             self.slider_adjustment.step_down()
 353             return True
 354
 355         return False
 356
 357     def serialize(self, object_backend):
 358         object_backend.add_property("volume", "%f" % self.slider_adjustment.get_value_db())
 359         object_backend.add_property("balance", "%f" % self.balance_adjustment.get_value())
 360
 361         if hasattr(self.channel, 'out_mute'):
 362             object_backend.add_property('out_mute', str(self.channel.out_mute))
 363         if self.channel.volume_midi_cc != -1:
 364             object_backend.add_property('volume_midi_cc', str(self.channel.volume_midi_cc))
 365         if self.channel.balance_midi_cc != -1:
 366             object_backend.add_property('balance_midi_cc', str(self.channel.balance_midi_cc))
 367         if self.channel.mute_midi_cc != -1:
 368             object_backend.add_property('mute_midi_cc', str(self.channel.mute_midi_cc))
 369         if self.channel.solo_midi_cc != -1:
 370             object_backend.add_property('solo_midi_cc', str(self.channel.solo_midi_cc))
 371
 372
 373     def unserialize_property(self, name, value):
 374         if name == "volume":
 375             self.slider_adjustment.set_value_db(float(value))
 376             return True
 377         if name == "balance":
 378             self.balance_adjustment.set_value(float(value))
 379             return True
 380         if name == 'out_mute':
 381             self.future_out_mute = (value == 'True')
 382             return True
 383         if name == 'volume_midi_cc':
 384             self.future_volume_midi_cc = int(value)
 385             return True
 386         if name == 'balance_midi_cc':
 387             self.future_balance_midi_cc = int(value)
 388             return True
 389         if name == 'mute_midi_cc':
 390             self.future_mute_midi_cc = int(value)
 391             return True
 392         if name == 'solo_midi_cc':
 393             self.future_solo_midi_cc = int(value)
 394             return True
 395         return False
 396
 397     def on_midi_event_received(self, *args):
 398         self.slider_adjustment.set_value_db(self.channel.volume, from_midi = True)
 399         self.balance_adjustment.set_balance(self.channel.balance, from_midi = True)
 400
 401     def on_monitor_button_toggled(self, button):
 402         if button.get_active():
 403             for channel in self.app.channels + self.app.output_channels:
 404                 if channel.monitor_button.get_active() and channel.monitor_button is not button:
 405                     channel.monitor_button.handler_block_by_func(
 406                                 channel.on_monitor_button_toggled)
 407                     channel.monitor_button.set_active(False)
 408                     channel.monitor_button.handler_unblock_by_func(
 409                                 channel.on_monitor_button_toggled)
 410             self.app.set_monitored_channel(self)
 411
 412     def set_monitored(self):
 413         if self.channel:
 414             self.app.set_monitored_channel(self)
 415         self.monitor_button.set_active(True)
 416
 417     def set_color(self, color):
 418         self.color = color
 419         set_background_color(self.label_name_event_box, self.css_name, self.color.to_string())
 420
 421 class InputChannel(Channel):
 422     post_fader_output_channel = None
 423
 424     def __init__(self, app, name, stereo, value = None):
 425         Channel.__init__(self, app, name, stereo, value)
 426
 427     def realize(self):
 428         self.channel = self.mixer.add_channel(self.channel_name, self.stereo)
 429
 430         if self.channel == None:
 431             raise Exception("Cannot create a channel")
 432         Channel.realize(self)
 433         if self.future_volume_midi_cc != None:
 434             self.channel.volume_midi_cc = self.future_volume_midi_cc
 435         if self.future_balance_midi_cc != None:
 436             self.channel.balance_midi_cc = self.future_balance_midi_cc
 437         if self.future_mute_midi_cc != None:
 438             self.channel.mute_midi_cc = self.future_mute_midi_cc
 439         if self.future_solo_midi_cc != None:
 440             self.channel.solo_midi_cc = self.future_solo_midi_cc
 441         if self.app._init_solo_channels and self.channel_name in self.app._init_solo_channels:
 442             self.channel.solo = True
 443
 444         self.channel.midi_scale = self.slider_scale.scale
 445
 446         self.on_volume_changed(self.slider_adjustment)
 447         self.on_balance_changed(self.balance_adjustment)
 448
 449         # vbox child at upper part
 450         self.vbox = Gtk.VBox()
 451         self.pack_start(self.vbox, False, True, 0)
 452         self.label_name = Gtk.Label()
 453         self.label_name.get_style_context().add_class('top_label')
 454         self.label_name.set_text(self.channel_name)
 455         self.label_name.set_width_chars(0)
 456         self.label_name_event_box = Gtk.EventBox()
 457         self.label_name_event_box.connect("button-press-event", self.on_label_mouse)
 458         self.label_name_event_box.add(self.label_name)
 459         self.vbox.pack_start(self.label_name_event_box, True, True, 0)
 460 #         self.label_stereo = Gtk.Label()
 461 #         if self.stereo:
 462 #             self.label_stereo.set_text("stereo")
 463 #         else:
 464 #             self.label_stereo.set_text("mono")
 465 #         self.label_stereo.set_size_request(0, -1)
 466 #         self.vbox.pack_start(self.label_stereo, True)
 467
 468         frame = Gtk.Frame()
 469         frame.set_shadow_type(Gtk.ShadowType.IN)
 470         frame.add(self.abspeak);
 471         self.pack_start(frame, False, True, 0)
 472
 473         # hbox child at lower part
 474         self.hbox = Gtk.HBox()
 475         self.hbox.pack_start(self.slider, True, True, 0)
 476         frame = Gtk.Frame()
 477         frame.set_shadow_type(Gtk.ShadowType.IN)
 478         frame.add(self.meter);
 479         self.hbox.pack_start(frame, True, True, 0)
 480         frame = Gtk.Frame()
 481         frame.set_shadow_type(Gtk.ShadowType.IN)
 482         frame.add(self.hbox);
 483         self.pack_start(frame, True, True, 0)
 484
 485         self.volume_digits.set_width_chars(6)
 486         self.pack_start(self.volume_digits, False, False, 0)
 487
 488         self.create_balance_widget()
 489
 490         self.hbox_mutesolo = Gtk.Box(False, 0)
 491
 492         self.mute = Gtk.ToggleButton()
 493         self.mute.set_label("M")
 494         self.mute.set_name("mute")
 495         self.mute.set_active(self.channel.out_mute)
 496         self.mute.connect("toggled", self.on_mute_toggled)
 497         self.hbox_mutesolo.pack_start(self.mute, True, True, 0)
 498
 499         self.solo = Gtk.ToggleButton()
 500         self.solo.set_label("S")
 501         self.solo.set_name("solo")
 502         self.solo.set_active(self.channel.solo)
 503         self.solo.connect("toggled", self.on_solo_toggled)
 504         self.hbox_mutesolo.pack_start(self.solo, True, True, 0)
 505
 506         self.pack_start(self.hbox_mutesolo, False, False, 0)
 507
 508         self.monitor_button = Gtk.ToggleButton('MON')
 509         self.monitor_button.connect('toggled', self.on_monitor_button_toggled)
 510         self.pack_start(self.monitor_button, False, False, 0)
 511
 512     def add_control_group(self, channel):
 513         control_group = ControlGroup(channel, self)
 514         control_group.show_all()
 515         self.vbox.pack_start(control_group, True, True, 0)
 516         return control_group
 517
 518     def remove_control_group(self, channel):
 519         ctlgroup = self.get_control_group(channel)
 520         self.vbox.remove(ctlgroup)
 521
 522     def update_control_group(self, channel):
 523         for control_group in self.vbox.get_children():
 524             if isinstance(control_group, ControlGroup):
 525                 if control_group.output_channel is channel:
 526                     control_group.update()
 527
 528     def get_control_group(self, channel):
 529         for control_group in self.vbox.get_children():
 530             if isinstance(control_group, ControlGroup):
 531                 if control_group.output_channel is channel:
 532                     return control_group
 533         return None
 534
 535     def unrealize(self):
 536         Channel.unrealize(self)
 537         if self.post_fader_output_channel:
 538             self.post_fader_output_channel.remove()
 539             self.post_fader_output_channel = None
 540         self.channel.remove()
 541         self.channel = None
 542
 543     channel_properties_dialog = None
 544
 545     def on_channel_properties(self):
 546         if not self.channel_properties_dialog:
 547             self.channel_properties_dialog = ChannelPropertiesDialog(self, self.app)
 548         self.channel_properties_dialog.show()
 549         self.channel_properties_dialog.present()
 550
 551     def on_label_mouse(self, widget, event):
 552         if event.type == Gdk.EventType._2BUTTON_PRESS:
 553             if event.button == 1:
 554                 self.on_channel_properties()
 555
 556     def on_mute_toggled(self, button):
 557         self.channel.out_mute = self.mute.get_active()
 558
 559     def on_solo_toggled(self, button):
 560         self.channel.solo = self.solo.get_active()
 561
 562     def midi_events_check(self):
 563         if hasattr(self, 'channel') and self.channel.midi_in_got_events:
 564             self.mute.set_active(self.channel.out_mute)
 565             self.solo.set_active(self.channel.solo)
 566             Channel.on_midi_event_received(self)
 567
 568     def on_solo_button_pressed(self, button, event, *args):
 569         if event.button == 3:
 570             # right click on the solo button, act on all output channels
 571             if button.get_active(): # was soloed
 572                 button.set_active(False)
 573                 if hasattr(button, 'touched_channels'):
 574                     touched_channels = button.touched_channels
 575                     for chan in touched_channels:
 576                         ctlgroup = self.get_control_group(chan)
 577                         ctlgroup.solo.set_active(False)
 578                     del button.touched_channels
 579             else: # was not soloed
 580                 button.set_active(True)
 581                 touched_channels = []
 582                 for chan in self.app.output_channels:
 583                     ctlgroup = self.get_control_group(chan)
 584                     if not ctlgroup.solo.get_active():
 585                         ctlgroup.solo.set_active(True)
 586                         touched_channels.append(chan)
 587                 button.touched_channels = touched_channels
 588             return True
 589         return False
 590
 591     @classmethod
 592     def serialization_name(cls):
 593         return 'input_channel'
 594
 595     def serialize(self, object_backend):
 596         object_backend.add_property("name", self.channel_name)
 597         if self.stereo:
 598             object_backend.add_property("type", "stereo")
 599         else:
 600             object_backend.add_property("type", "mono")
 601         Channel.serialize(self, object_backend)
 602
 603     def unserialize_property(self, name, value):
 604         if name == "name":
 605             self.channel_name = str(value)
 606             return True
 607         if name == "type":
 608             if value == "stereo":
 609                 self.stereo = True
 610                 return True
 611             if value == "mono":
 612                 self.stereo = False
 613                 return True
 614         return Channel.unserialize_property(self, name, value)
 615
 616 class OutputChannel(Channel):
 617     _display_solo_buttons = False
 618
 619     _init_muted_channels = None
 620     _init_solo_channels = None
 621     _init_prefader_channels = None
 622
 623     def __init__(self, app, name, stereo, value = None):
 624         Channel.__init__(self, app, name, stereo, value)
 625
 626     def get_display_solo_buttons(self):
 627         return self._display_solo_buttons
 628
 629     def set_display_solo_buttons(self, value):
 630         self._display_solo_buttons = value
 631         # notifying control groups
 632         for inputchannel in self.app.channels:
 633             inputchannel.update_control_group(self)
 634
 635     display_solo_buttons = property(get_display_solo_buttons, set_display_solo_buttons)
 636
 637     def realize(self):
 638         self.channel = self.mixer.add_output_channel(self.channel_name, self.stereo)
 639         if self.channel == None:
 640             raise Exception("Cannot create a channel")
 641         Channel.realize(self)
 642         if self.future_volume_midi_cc != None:
 643             self.channel.volume_midi_cc = self.future_volume_midi_cc
 644         if self.future_balance_midi_cc != None:
 645             self.channel.balance_midi_cc = self.future_balance_midi_cc
 646         if self.future_mute_midi_cc != None:
 647             self.channel.mute_midi_cc = self.future_mute_midi_cc
 648         self.channel.midi_scale = self.slider_scale.scale
 649
 650         self.on_volume_changed(self.slider_adjustment)
 651         self.on_balance_changed(self.balance_adjustment)
 652
 653         # vbox child at upper part
 654         self.vbox = Gtk.VBox()
 655         self.pack_start(self.vbox, False, True, 0)
 656         self.label_name = Gtk.Label()
 657         self.label_name.get_style_context().add_class('top_label')
 658         self.label_name.set_text(self.channel_name)
 659         self.label_name.set_width_chars(0)
 660         self.label_name_event_box = Gtk.EventBox()
 661         self.label_name_event_box.connect('button-press-event', self.on_label_mouse)
 662         self.label_name_event_box.add(self.label_name)
 663         if not hasattr(self, 'color'):
 664             self.color = random_color()
 665         set_background_color(self.label_name_event_box, self.css_name,
 666                self.color.to_string())
 667         self.vbox.pack_start(self.label_name_event_box, True, True, 0)
 668         frame = Gtk.Frame()
 669         frame.set_shadow_type(Gtk.ShadowType.IN)
 670         frame.add(self.abspeak);
 671         self.vbox.pack_start(frame, False, True, 0)
 672
 673         # hbox child at lower part
 674         self.hbox = Gtk.HBox()
 675         self.hbox.pack_start(self.slider, True, True, 0)
 676         frame = Gtk.Frame()
 677         frame.set_shadow_type(Gtk.ShadowType.IN)
 678         frame.add(self.meter);
 679         self.hbox.pack_start(frame, True, True, 0)
 680         frame = Gtk.Frame()
 681         frame.set_shadow_type(Gtk.ShadowType.IN)
 682         frame.add(self.hbox);
 683         self.pack_start(frame, True, True, 0)
 684
 685         self.volume_digits.set_width_chars(6)
 686         self.pack_start(self.volume_digits, False, True, 0)
 687
 688         self.create_balance_widget()
 689
 690         self.mute = Gtk.ToggleButton()
 691         self.mute.set_label("M")
 692         self.mute.set_name("mute")
 693         self.mute.set_active(self.channel.out_mute)
 694         self.mute.connect("toggled", self.on_mute_toggled)
 695
 696         hbox = Gtk.HBox()
 697         hbox.pack_start(self.mute, True, True, 0)
 698         self.pack_start(hbox, False, False, 0)
 699
 700         self.monitor_button = Gtk.ToggleButton('MON')
 701         self.monitor_button.connect('toggled', self.on_monitor_button_toggled)
 702         self.pack_start(self.monitor_button, False, False, 0)
 703
 704         # add control groups to the input channels, and initialize them
 705         # appropriately
 706         for input_channel in self.app.channels:
 707             ctlgroup = input_channel.add_control_group(self)
 708             if self._init_muted_channels and input_channel.channel.name in self._init_muted_channels:
 709                 ctlgroup.mute.set_active(True)
 710             if self._init_solo_channels and input_channel.channel.name in self._init_solo_channels:
 711                 ctlgroup.solo.set_active(True)
 712             if self._init_prefader_channels and input_channel.channel.name in self._init_prefader_channels:
 713                 ctlgroup.prefader.set_active(True)
 714         self._init_muted_channels = None
 715         self._init_solo_channels = None
 716         self._init_prefader_channels = None
 717
 718     channel_properties_dialog = None
 719     def on_channel_properties(self):
 720         if not self.channel_properties_dialog:
 721             self.channel_properties_dialog = OutputChannelPropertiesDialog(self, self.app)
 722         self.channel_properties_dialog.show()
 723         self.channel_properties_dialog.present()
 724
 725     def on_label_mouse(self, widget, event):
 726         if event.type == Gdk.EventType._2BUTTON_PRESS:
 727             if event.button == 1:
 728                 self.on_channel_properties()
 729
 730     def on_mute_toggled(self, button):
 731         self.channel.out_mute = self.mute.get_active()
 732
 733     def midi_events_check(self):
 734         if self.channel != None and self.channel.midi_in_got_events:
 735             self.mute.set_active(self.channel.out_mute)
 736             Channel.on_midi_event_received(self)
 737
 738     def unrealize(self):
 739         # remove control groups from input channels
 740         for input_channel in self.app.channels:
 741             input_channel.remove_control_group(self)
 742         # then remove itself
 743         Channel.unrealize(self)
 744         self.channel.remove()
 745         self.channel = None
 746
 747     @classmethod
 748     def serialization_name(cls):
 749         return 'output_channel'
 750
 751     def serialize(self, object_backend):
 752         object_backend.add_property("name", self.channel_name)
 753         if self.stereo:
 754             object_backend.add_property("type", "stereo")
 755         else:
 756             object_backend.add_property("type", "mono")
 757         if self.display_solo_buttons:
 758             object_backend.add_property("solo_buttons", "true")
 759         muted_channels = []
 760         solo_channels = []
 761         prefader_in_channels = []
 762         for input_channel in self.app.channels:
 763             if self.channel.is_muted(input_channel.channel):
 764                 muted_channels.append(input_channel)
 765             if self.channel.is_solo(input_channel.channel):
 766                 solo_channels.append(input_channel)
 767             if self.channel.is_in_prefader(input_channel.channel):
 768                 prefader_in_channels.append(input_channel)
 769         if muted_channels:
 770             object_backend.add_property('muted_channels', '|'.join([x.channel.name for x in muted_channels]))
 771         if solo_channels:
 772             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 773         if prefader_in_channels:
 774             object_backend.add_property('prefader_channels', '|'.join([x.channel.name for x in prefader_in_channels]))
 775         object_backend.add_property("color", self.color.to_string())
 776         Channel.serialize(self, object_backend)
 777
 778     def unserialize_property(self, name, value):
 779         if name == "name":
 780             self.channel_name = str(value)
 781             return True
 782         if name == "type":
 783             if value == "stereo":
 784                 self.stereo = True
 785                 return True
 786             if value == "mono":
 787                 self.stereo = False
 788                 return True
 789         if name == "solo_buttons":
 790             if value == "true":
 791                 self.display_solo_buttons = True
 792                 return True
 793         if name == 'muted_channels':
 794             self._init_muted_channels = value.split('|')
 795             return True
 796         if name == 'solo_channels':
 797             self._init_solo_channels = value.split('|')
 798             return True
 799         if name == 'prefader_channels':
 800             self._init_prefader_channels = value.split('|')
 801             return True
 802         if name == 'color':
 803             c = Gdk.RGBA()
 804             c.parse(value)
 805             self.color = c
 806             return True
 807         return Channel.unserialize_property(self, name, value)
 808
 809 class ChannelPropertiesDialog(Gtk.Dialog):
 810     channel = None
 811
 812     def __init__(self, parent, app):
 813         self.channel = parent
 814         self.app = app
 815         self.mixer = self.channel.mixer
 816         Gtk.Dialog.__init__(self, 'Channel "%s" Properties' % self.channel.channel_name, app.window)
 817         self.set_default_size(365, -1)
 818
 819         self.add_button(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL)
 820         self.ok_button = self.add_button(Gtk.STOCK_APPLY, Gtk.ResponseType.APPLY)
 821         self.set_default_response(Gtk.ResponseType.APPLY);
 822
 823         self.create_ui()
 824         self.fill_ui()
 825
 826         self.connect('response', self.on_response_cb)
 827         self.connect('delete-event', self.on_response_cb)
 828
 829     def create_frame(self, label, child):
 830         frame = Gtk.Frame()
 831         frame.set_label('')
 832         frame.set_border_width(3)
 833         #frame.set_shadow_type(Gtk.ShadowType.NONE)
 834         frame.get_label_widget().set_markup('<b>%s</b>' % label)
 835
 836         alignment = Gtk.Alignment.new(0, 0, 1, 1)
 837         alignment.set_padding(0, 0, 12, 0)
 838         frame.add(alignment)
 839         alignment.add(child)
 840
 841         return frame
 842
 843     def create_ui(self):
 844         vbox = Gtk.VBox()
 845         self.vbox.add(vbox)
 846
 847         self.properties_table = table = Gtk.Table(4, 3, False)
 848         vbox.pack_start(self.create_frame('Properties', table), True, True, 0)
 849         table.set_row_spacings(5)
 850         table.set_col_spacings(5)
 851
 852         table.attach(Gtk.Label(label='Name'), 0, 1, 0, 1)
 853         self.entry_name = Gtk.Entry()
 854         self.entry_name.set_activates_default(True)
 855         self.entry_name.connect('changed', self.on_entry_name_changed)
 856         table.attach(self.entry_name, 1, 2, 0, 1)
 857
 858         table.attach(Gtk.Label(label='Mode'), 0, 1, 1, 2)
 859         self.mode_hbox = Gtk.HBox()
 860         table.attach(self.mode_hbox, 1, 2, 1, 2)
 861         self.mono = Gtk.RadioButton(label='Mono')
 862         self.stereo = Gtk.RadioButton(label='Stereo', group=self.mono)
 863         self.mode_hbox.pack_start(self.mono, True, True, 0)
 864         self.mode_hbox.pack_start(self.stereo, True, True, 0)
 865
 866         table = Gtk.Table(2, 3, False)
 867         vbox.pack_start(self.create_frame('MIDI Control Changes', table), True, True, 0)
 868         table.set_row_spacings(5)
 869         table.set_col_spacings(5)
 870
 871         cc_tooltip = "{} MIDI Control Change number (0-127, set to -1 to assign next free CC #)"
 872         table.attach(Gtk.Label(label='Volume'), 0, 1, 0, 1)
 873         self.entry_volume_cc = Gtk.SpinButton.new_with_range(-1, 127, 1)
 874         self.entry_volume_cc.set_tooltip_text(cc_tooltip.format("Volume"))
 875         table.attach(self.entry_volume_cc, 1, 2, 0, 1)
 876         self.button_sense_midi_volume = Gtk.Button('Learn')
 877         self.button_sense_midi_volume.connect('clicked',
 878                         self.on_sense_midi_volume_clicked)
 879         table.attach(self.button_sense_midi_volume, 2, 3, 0, 1)
 880
 881         table.attach(Gtk.Label(label='Balance'), 0, 1, 1, 2)
 882         self.entry_balance_cc = Gtk.SpinButton.new_with_range(-1, 127, 1)
 883         self.entry_balance_cc.set_tooltip_text(cc_tooltip.format("Balance"))
 884         table.attach(self.entry_balance_cc, 1, 2, 1, 2)
 885         self.button_sense_midi_balance = Gtk.Button('Learn')
 886         self.button_sense_midi_balance.connect('clicked',
 887                         self.on_sense_midi_balance_clicked)
 888         table.attach(self.button_sense_midi_balance, 2, 3, 1, 2)
 889
 890         table.attach(Gtk.Label(label='Mute'), 0, 1, 2, 3)
 891         self.entry_mute_cc = Gtk.SpinButton.new_with_range(-1, 127, 1)
 892         self.entry_mute_cc.set_tooltip_text(cc_tooltip.format("Mute"))
 893         table.attach(self.entry_mute_cc, 1, 2, 2, 3)
 894         self.button_sense_midi_mute = Gtk.Button('Learn')
 895         self.button_sense_midi_mute.connect('clicked',
 896                         self.on_sense_midi_mute_clicked)
 897         table.attach(self.button_sense_midi_mute, 2, 3, 2, 3)
 898
 899         if (isinstance(self, NewChannelDialog) or (self.channel and
 900             isinstance(self.channel, InputChannel))):
 901             table.attach(Gtk.Label(label='Solo'), 0, 1, 3, 4)
 902             self.entry_solo_cc = Gtk.SpinButton.new_with_range(-1, 127, 1)
 903             self.entry_solo_cc.set_tooltip_text(cc_tooltip.format("Solo"))
 904             table.attach(self.entry_solo_cc, 1, 2, 3, 4)
 905             self.button_sense_midi_solo = Gtk.Button('Learn')
 906             self.button_sense_midi_solo.connect('clicked',
 907                             self.on_sense_midi_solo_clicked)
 908             table.attach(self.button_sense_midi_solo, 2, 3, 3, 4)
 909
 910         self.vbox.show_all()
 911
 912     def fill_ui(self):
 913         self.entry_name.set_text(self.channel.channel_name)
 914         if self.channel.channel.is_stereo:
 915             self.stereo.set_active(True)
 916         else:
 917             self.mono.set_active(True)
 918         self.mode_hbox.set_sensitive(False)
 919         self.entry_volume_cc.set_value(self.channel.channel.volume_midi_cc)
 920         self.entry_balance_cc.set_value(self.channel.channel.balance_midi_cc)
 921         self.entry_mute_cc.set_value(self.channel.channel.mute_midi_cc)
 922         if (self.channel and isinstance(self.channel, InputChannel)):
 923             self.entry_solo_cc.set_value(self.channel.channel.solo_midi_cc)
 924
 925     def sense_popup_dialog(self, entry):
 926         window = Gtk.Window.new(Gtk.WindowType.TOPLEVEL)
 927         window.set_destroy_with_parent(True)
 928         window.set_transient_for(self)
 929         window.set_decorated(False)
 930         window.set_modal(True)
 931         window.set_position(Gtk.WindowPosition.CENTER_ON_PARENT)
 932         window.set_border_width(10)
 933
 934         vbox = Gtk.VBox(10)
 935         window.add(vbox)
 936         window.timeout = 5
 937         vbox.pack_start(Gtk.Label(label='Please move the MIDI control you want to use for this function.'), True, True, 0)
 938         timeout_label = Gtk.Label(label='This window will close in 5 seconds')
 939         vbox.pack_start(timeout_label, True, True, 0)
 940         def close_sense_timeout(window, entry):
 941             window.timeout -= 1
 942             timeout_label.set_text('This window will close in %d seconds.' % window.timeout)
 943             if window.timeout == 0:
 944                 window.destroy()
 945                 entry.set_value(self.mixer.last_midi_channel)
 946                 return False
 947             return True
 948         window.show_all()
 949         GObject.timeout_add_seconds(1, close_sense_timeout, window, entry)
 950
 951     def on_sense_midi_volume_clicked(self, *args):
 952         self.mixer.last_midi_channel = int(self.entry_volume_cc.get_value())
 953         self.sense_popup_dialog(self.entry_volume_cc)
 954
 955     def on_sense_midi_balance_clicked(self, *args):
 956         self.mixer.last_midi_channel = int(self.entry_balance_cc.get_value())
 957         self.sense_popup_dialog(self.entry_balance_cc)
 958
 959     def on_sense_midi_mute_clicked(self, *args):
 960         self.mixer.last_midi_channel = int(self.entry_mute_cc.get_value())
 961         self.sense_popup_dialog(self.entry_mute_cc)
 962
 963     def on_sense_midi_solo_clicked(self, *args):
 964         self.mixer.last_midi_channel = int(self.entry_solo_cc.get_value())
 965         self.sense_popup_dialog(self.entry_solo_cc)
 966
 967     def on_response_cb(self, dlg, response_id, *args):
 968         self.channel.channel_properties_dialog = None
 969         name = self.entry_name.get_text()
 970         if response_id == Gtk.ResponseType.APPLY:
 971             if name != self.channel.channel_name:
 972                 self.channel.channel_name = name
 973             for control in ('volume', 'balance', 'mute', 'solo'):
 974                 widget = getattr(self, 'entry_{}_cc'.format(control), None)
 975                 if widget is not None:
 976                     value = int(widget.get_value())
 977                     if value != -1:
 978                         setattr(self.channel.channel, '{}_midi_cc'.format(control), value)
 979         self.destroy()
 980
 981     def on_entry_name_changed(self, entry):
 982         sensitive = False
 983         if len(entry.get_text()):
 984             if self.channel and self.channel.channel.name == entry.get_text():
 985                 sensitive = True
 986             elif entry.get_text() not in [x.channel.name for x in self.app.channels] + \
 987                         [x.channel.name for x in self.app.output_channels] + ['MAIN']:
 988                 sensitive = True
 989         self.ok_button.set_sensitive(sensitive)
 990
 991
 992 class NewChannelDialog(ChannelPropertiesDialog):
 993     def create_ui(self):
 994         ChannelPropertiesDialog.create_ui(self)
 995         self.add_initial_value_radio()
 996         self.vbox.show_all()
 997
 998     def add_initial_value_radio(self):
 999         self.properties_table.attach(Gtk.Label(label='Value'), 0, 1, 2, 3)
1000         self.value_hbox = Gtk.HBox()
1001         self.properties_table.attach(self.value_hbox, 1, 2, 2, 3)
1002         self.minus_inf = Gtk.RadioButton(label='-Inf')
1003         self.zero_dB = Gtk.RadioButton(label='0dB', group=self.minus_inf)
1004         self.value_hbox.pack_start(self.minus_inf, True, True, 0)
1005         self.value_hbox.pack_start(self.zero_dB, True, True, 0)
1006
1007
1008 class NewInputChannelDialog(NewChannelDialog):
1009     def __init__(self, app):
1010         Gtk.Dialog.__init__(self, 'New Input Channel', app.window)
1011         self.set_default_size(365, -1)
1012         self.mixer = app.mixer
1013         self.app = app
1014         self.create_ui()
1015         self.fill_ui()
1016
1017         self.stereo.set_active(True) # default to stereo
1018
1019         self.add_button(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL)
1020         self.ok_button = self.add_button(Gtk.STOCK_ADD, Gtk.ResponseType.OK)
1021         self.ok_button.set_sensitive(False)
1022         self.set_default_response(Gtk.ResponseType.OK);
1023
1024     def fill_ui(self):
1025         self.entry_volume_cc.set_value(-1)
1026         self.entry_balance_cc.set_value(-1)
1027         self.entry_mute_cc.set_value(-1)
1028         self.entry_solo_cc.set_value(-1)
1029
1030     def get_result(self):
1031         log.debug('minus_inf active?: %s', self.zero_dB.get_active())
1032         return {'name': self.entry_name.get_text(),
1033                 'stereo': self.stereo.get_active(),
1034                 'volume_cc': int(self.entry_volume_cc.get_value()),
1035                 'balance_cc': int(self.entry_balance_cc.get_value()),
1036                 'mute_cc': int(self.entry_mute_cc.get_value()),
1037                 'solo_cc': int(self.entry_solo_cc.get_value()),
1038                 'value': self.minus_inf.get_active()
1039                }
1040
1041
1042 class OutputChannelPropertiesDialog(ChannelPropertiesDialog):
1043     def create_ui(self):
1044         ChannelPropertiesDialog.create_ui(self)
1045
1046         table = self.properties_table
1047         table.attach(Gtk.Label(label='Color'), 0, 1, 4, 5)
1048         self.color_chooser_button = Gtk.ColorButton()
1049         self.color_chooser_button.set_use_alpha(True)
1050         self.color_chooser_button.set_rgba(Gdk.RGBA(0, 0, 0, 0))
1051         table.attach(self.color_chooser_button, 1, 2, 4, 5)
1052
1053         vbox = Gtk.VBox()
1054         self.vbox.pack_start(self.create_frame('Input Channels', vbox), True, True, 0)
1055
1056         self.display_solo_buttons = Gtk.CheckButton('Display solo buttons')
1057         vbox.pack_start(self.display_solo_buttons, True, True, 0)
1058
1059         self.vbox.show_all()
1060
1061     def fill_ui(self):
1062         ChannelPropertiesDialog.fill_ui(self)
1063         self.display_solo_buttons.set_active(self.channel.display_solo_buttons)
1064         self.color_chooser_button.set_rgba(self.channel.color)
1065
1066     def on_response_cb(self, dlg, response_id, *args):
1067         ChannelPropertiesDialog.on_response_cb(self, dlg, response_id, *args)
1068         if response_id == Gtk.ResponseType.APPLY:
1069             self.channel.display_solo_buttons = self.display_solo_buttons.get_active()
1070             self.channel.set_color(self.color_chooser_button.get_rgba())
1071             for inputchannel in self.app.channels:
1072                 inputchannel.update_control_group(self.channel)
1073
1074
1075 class NewOutputChannelDialog(NewChannelDialog, OutputChannelPropertiesDialog):
1076     def __init__(self, app):
1077         Gtk.Dialog.__init__(self, 'New Output Channel', app.window)
1078         self.mixer = app.mixer
1079         self.app = app
1080         OutputChannelPropertiesDialog.create_ui(self)
1081         self.add_initial_value_radio()
1082         self.vbox.show_all()
1083         self.fill_ui()
1084         self.set_default_size(365, -1)
1085
1086         # TODO: disable mode for output channels as mono output channels may
1087         # not be correctly handled yet.
1088         self.mode_hbox.set_sensitive(False)
1089         self.stereo.set_active(True) # default to stereo
1090
1091         self.add_button(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL)
1092         self.ok_button = self.add_button(Gtk.STOCK_ADD, Gtk.ResponseType.OK)
1093         self.ok_button.set_sensitive(False)
1094         self.set_default_response(Gtk.ResponseType.OK);
1095
1096     def fill_ui(self):
1097         self.entry_volume_cc.set_value(-1)
1098         self.entry_balance_cc.set_value(-1)
1099         self.entry_mute_cc.set_value(-1)
1100
1101     def get_result(self):
1102         return {'name': self.entry_name.get_text(),
1103                 'stereo': self.stereo.get_active(),
1104                 'volume_cc': int(self.entry_volume_cc.get_value()),
1105                 'balance_cc': int(self.entry_balance_cc.get_value()),
1106                 'mute_cc': int(self.entry_mute_cc.get_value()),
1107                 'display_solo_buttons': self.display_solo_buttons.get_active(),
1108                 'color': self.color_chooser_button.get_rgba(),
1109                 'value': self.minus_inf.get_active()
1110                 }
1111
1112
1113 class ControlGroup(Gtk.Alignment):
1114     def __init__(self, output_channel, input_channel):
1115         GObject.GObject.__init__(self)
1116         self.set(0.5, 0.5, 1, 1)
1117         self.output_channel = output_channel
1118         self.input_channel = input_channel
1119         self.app = input_channel.app
1120
1121         self.hbox = Gtk.HBox()
1122         self.vbox = Gtk.VBox()
1123         self.add(self.vbox)
1124         self.buttons_box = Gtk.Box(False, button_padding)
1125
1126         set_background_color(self.vbox, output_channel.css_name,
1127                 output_channel.color.to_string())
1128
1129         self.vbox.pack_start(self.hbox, True, True, button_padding)
1130         css = b"""
1131 .control_group {
1132     min-width: 0px;
1133     padding: 0px;
1134 }
1135
1136 .control_group #label,
1137 .control_group #mute,
1138 .control_group #pre_fader,
1139 .control_group #solo {
1140     font-size: smaller;
1141     padding: 0px .1em;
1142 }
1143 """
1144
1145         css_provider = Gtk.CssProvider()
1146         css_provider.load_from_data(css)
1147         context = Gtk.StyleContext()
1148         screen = Gdk.Screen.get_default()
1149         context.add_provider_for_screen(screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
1150         hbox_context = self.hbox.get_style_context()
1151         hbox_context.add_class('control_group')
1152
1153         self.label = Gtk.Label(output_channel.channel.name)
1154         self.label.set_name("label")
1155         self.hbox.pack_start(self.label, False, False, button_padding)
1156         self.hbox.pack_end(self.buttons_box, False, False, button_padding)
1157         mute = Gtk.ToggleButton()
1158         mute.set_label("M")
1159         mute.set_name("mute")
1160         mute.set_tooltip_text("Mute output channel send")
1161         mute.connect("toggled", self.on_mute_toggled)
1162         self.mute = mute
1163         solo = Gtk.ToggleButton()
1164         solo.set_name("solo")
1165         solo.set_label("S")
1166         solo.set_tooltip_text("Solo output send")
1167         solo.connect("toggled", self.on_solo_toggled)
1168         self.solo = solo
1169         pre = Gtk.ToggleButton("P")
1170         pre.set_name("pre_fader")
1171         pre.set_tooltip_text("Pre (on) / Post (off) fader send")
1172         pre.connect("toggled", self.on_prefader_toggled)
1173         self.prefader = pre
1174         self.buttons_box.pack_start(pre, True, True, button_padding)
1175         self.buttons_box.pack_start(mute, True, True, button_padding)
1176         if self.output_channel.display_solo_buttons:
1177             self.buttons_box.pack_start(solo, True, True, button_padding)
1178
1179     def update(self):
1180         if self.output_channel.display_solo_buttons:
1181             if not self.solo in self.buttons_box.get_children():
1182                 self.buttons_box.pack_start(self.solo, True, True, button_padding)
1183                 self.solo.show()
1184         else:
1185             if self.solo in self.buttons_box.get_children():
1186                 self.buttons_box.remove(self.solo)
1187
1188         self.label.set_text(self.output_channel.channel.name)
1189         set_background_color(self.vbox, self.output_channel.css_name, self.output_channel.color.to_string())
1190
1191     def on_mute_toggled(self, button):
1192         self.output_channel.channel.set_muted(self.input_channel.channel, button.get_active())
1193         self.app.update_monitor(self)
1194
1195     def on_solo_toggled(self, button):
1196         self.output_channel.channel.set_solo(self.input_channel.channel, button.get_active())
1197         self.app.update_monitor(self)
1198
1199     def on_prefader_toggled(self, button):
1200         self.output_channel.channel.set_in_prefader(self.input_channel.channel, button.get_active())