[modules/pulsectl] add default device selection

re-enable functionality to add a popup that allows the user to select
the default source/sink.

fixes #965

bumblebee-status

@@ -68,10 +68,13 @@ def handle_commands(config, update_lock):
 
 def handle_events(config, update_lock):
     while True:
-        line = sys.stdin.readline().strip(",").strip()
-        if line == "[": continue
-        logging.info("input event: {}".format(line))
-        process_event(line, config, update_lock)
+        try:
+            line = sys.stdin.readline().strip(",").strip()
+            if line == "[": continue
+            logging.info("input event: {}".format(line))
+            process_event(line, config, update_lock)
+        except Exception as e:
+            logging.error(e)
 
 
 def main():

bumblebee_status/modules/core/pulsectl.py

@@ -35,6 +35,8 @@ Requires the following Python module:
 """
 
 import pulsectl
+import logging
+import functools
 
 import core.module
 import core.widget
@@ -45,6 +47,11 @@ import util.cli
 import util.graph
 import util.format
 
+try:
+    import util.popup
+except ImportError as e:
+    logging.warning("Couldn't import util.popup: %s. Popups won't work!", e)
+
 class Module(core.module.Module):
     def __init__(self, config, theme, type):
         super().__init__(config, theme, core.widget.Widget(self.display))
@@ -161,6 +168,21 @@ class Module(core.module.Module):
             pulse.event_callback_set(self.process)
             pulse.event_listen()
 
+    def select_default_device_popup(self, widget):
+        with pulsectl.Pulse(self.id) as pulse:
+            devs = pulse.sink_list() if self.__type == "sink" else pulse.source_list()
+        menu = util.popup.menu()
+        for dev in devs:
+            menu.add_menuitem(
+                dev.description,
+                callback=functools.partial(self.__on_default_changed, dev),
+            )
+        menu.show(widget)
+
+    def __on_default_changed(self, dev):
+        with pulsectl.Pulse(self.id) as pulse:
+            pulse.default_set(dev)
+
     def state(self, _):
         if self.__muted:
             return ["warning", "muted"]