ptt.py

README.md

@@ -20,4 +20,5 @@ This comes with absolutely no guarantee of support or correct function, although
 * some weird thing which lets you use synonyms to get attributes on python objects
 * something which generates random vaguely human readable names in Elm. Please note that I do NOT endorse the use of Elm and this is provided mostly just to make the languages list at the side weirder.
 * F# kerbal name generator & very basic stack calculator
-* importer part of an unfinished wikipedia database dump viewer
+* importer part of an unfinished wikipedia database dump viewer
+* `ptt.py` - Python-based systemwide push to talk (mutes and unmutes microphone via PulseAudio) with tray icon

ptt.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+from pynput import keyboard
+import subprocess
+import wx
+import wx.adv
+import wx.lib.newevent
+import sys
+import os.path
+import threading
+
+scriptdir = os.path.dirname(os.path.abspath(sys.argv[0]))
+red, green = os.path.join(scriptdir, "red.png"), os.path.join(scriptdir, "green.png")
+
+l_key = keyboard.KeyCode(65312)
+source = "alsa_input.usb-0c76_USB_PnP_Audio_Device-00.mono-fallback"
+
+MuteSetEvent, EVT_MUTE_SET_EVENT = wx.lib.newevent.NewEvent()
+
+class TaskBarIcon(wx.adv.TaskBarIcon):
+	def __init__(self, frame):
+		self.red_icon = wx.Icon(red)
+		self.green_icon = wx.Icon(green)
+		self.frame = frame
+		super(TaskBarIcon, self).__init__()
+		self.Bind(wx.adv.EVT_TASKBAR_LEFT_DOWN, self.on_left_down)
+		self.Bind(EVT_MUTE_SET_EVENT, self.on_mute_set)
+	
+	def on_mute_set(self, event):
+		self.set_icon(self.red_icon if event.muted else self.green_icon)
+
+	def on_left_down(self, event):
+		toggle()
+
+	def set_icon(self, icon):
+		self.SetIcon(icon, "PTT")
+
+class App(wx.App):
+	def OnInit(self):
+		frame=wx.Frame(None)
+		self.SetTopWindow(frame)
+		self.taskbar_icon = TaskBarIcon(frame)
+		return True
+
+app = App(False)
+
+muted = False
+
+def mute():
+	global muted
+	if not muted:
+		muted = True
+		print("muted")
+		subprocess.run(["pacmd", "set-source-mute", source, "1"])
+		# this could call set_icon on the taskbar icon object directly, but that seems to inconsistently cause mysterious crashes in cairo
+		wx.PostEvent(app.taskbar_icon, MuteSetEvent(muted=muted))
+def unmute():
+	global muted
+	if muted:
+		muted = False
+		print("unmuted")
+		subprocess.run(["pacmd", "set-source-mute", source, "0"])
+		wx.PostEvent(app.taskbar_icon, MuteSetEvent(muted=muted))
+
+def toggle():
+	if muted: unmute()
+	else: mute()
+
+def on_press(key):
+	if key == l_key: unmute()
+
+def on_release(key):
+	if key == l_key: mute()
+
+mute()
+threading.Thread(target=app.MainLoop).start()
+with keyboard.Listener(
+	on_press=on_press,
+	on_release=on_release) as listener:
+	try:
+		listener.join()
+	except KeyboardInterrupt:
+		listener.stop()
+		print("shutting down")
+		unmute()
+		app.Destroy()
+		sys.exit(0)