[modules/keys] add missing modules

forgot to add in the previous commit

bumblebee_status/modules/core/keys.py

@@ -0,0 +1,56 @@
+# pylint: disable=C0111,R0903
+
+"""Shows when a key is pressed
+
+Parameters:
+    * keys.keys: Comma-separated list of keys to monitor (defaults to "")
+"""
+
+import core.module
+import core.widget
+import core.decorators
+import core.event
+
+import util.format
+
+from pynput.keyboard import Listener
+
+NAMES = {
+    "Key.cmd": "cmd",
+    "Key.ctrl": "ctrl",
+    "Key.shift": "shift",
+    "Key.alt": "alt",
+}
+
+class Module(core.module.Module):
+    @core.decorators.never
+    def __init__(self, config, theme):
+        super().__init__(config, theme, [])
+
+        self._listener = Listener(on_press=self._key_press, on_release=self._key_release)
+
+        self._keys = util.format.aslist(self.parameter("keys", "Key.cmd,Key.ctrl,Key.alt,Key.shift"))
+
+        for k in self._keys:
+            self.add_widget(name=k, full_text=self._display_name(k), hidden=True)
+        self._listener.start()
+
+    def _display_name(self, key):
+        return NAMES.get(key, key)
+
+    def _key_press(self, key):
+        key = str(key)
+        if not key in self._keys: return
+        self.widget(key).hidden = False
+        core.event.trigger("update", [self.id], redraw_only=False)
+
+    def _key_release(self, key):
+        key = str(key)
+        if not key in self._keys: return
+        self.widget(key).hidden = True
+        core.event.trigger("update", [self.id], redraw_only=False)
+    
+    def state(self, widget):
+        return widget.name
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4