abspeak.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 gtk
  19 import fpconst
  20 import pango
  21 import gobject
  22
  23 class AbspeakWidget(gtk.EventBox):
  24     def __init__(self):
  25         gtk.EventBox.__init__(self)
  26         self.label = gtk.Label()
  27         attrs = pango.AttrList()
  28         font_attr =  pango.AttrFamily("monospace")
  29         attrs.insert(font_attr)
  30         self.label.set_attributes(attrs)
  31         self.add(self.label)
  32         self.connect("button-press-event", self.on_mouse)
  33         self.peak = fpconst.NegInf
  34
  35     def on_mouse(self, widget, event):
  36         if event.type == gtk.gdk.BUTTON_PRESS:
  37             if event.button == 1:
  38                 self.emit("reset")
  39             elif event.button == 2:
  40                 adjust = -self.peak
  41                 if abs(adjust) < 30:    # we better don't adjust more than +- 30 dB
  42                     self.emit("volume-adjust", adjust)
  43
  44     def set_peak(self, peak):
  45         self.peak = peak
  46         if fpconst.isNaN(peak):
  47             self.modify_bg(gtk.STATE_NORMAL, gtk.gdk.Color(int(65535 * 0.7), 0, 0))
  48             self.label.set_text("NaN")
  49         else:
  50             text = "%+.1f" % peak
  51
  52             if peak > 0:
  53                 self.modify_bg(gtk.STATE_NORMAL, gtk.gdk.Color(int(65535 * 0.8), int(65535 * 0.3), 0))
  54             else:
  55                 self.modify_bg(gtk.STATE_NORMAL, self.label.style.bg[gtk.STATE_NORMAL])
  56
  57             self.label.set_text(text)
  58
  59 gobject.signal_new("reset", AbspeakWidget,
  60                    gobject.SIGNAL_RUN_FIRST | gobject.SIGNAL_ACTION, gobject.TYPE_NONE, [])
  61 gobject.signal_new("volume-adjust", AbspeakWidget,
  62                    gobject.SIGNAL_RUN_FIRST | gobject.SIGNAL_ACTION, gobject.TYPE_NONE, [gobject.TYPE_FLOAT])