[modules/xrandr] Add module to show attached displays

This modules shows attached displays and their states (on or off).
Future versions of this module will order the icons by the relative
order of the screens (left-to-right) and will allow switching monitors
on and off.

see #19

bumblebee/modules/xrandr.py

@@ -0,0 +1,43 @@
+import bumblebee.module
+import re
+import subprocess
+
+def description():
+    return "Shows all connected screens"
+
+def parameters():
+    return [
+    ]
+
+class Module(bumblebee.module.Module):
+    def __init__(self, output, config, alias):
+        super(Module, self).__init__(output, config, alias)
+        self._state = "off"
+
+    def widgets(self):
+        process = subprocess.Popen([ "xrandr", "-q" ], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        output, error = process.communicate()
+
+        widgets = []
+
+        # TODO: sort by position
+        for line in output.split("\n"):
+            if not " connected" in line:
+                continue
+            screen = line.split(" ", 2)[0]
+            m = re.search(r'\d+x\d+\+\d+\+\d+', line)
+            self._state = "on" if m else "off"
+            widgets.append(bumblebee.output.Widget(self, screen))
+
+        return widgets
+
+    def state(self, widget):
+        return self._state
+
+    def warning(self, widget):
+        return False
+
+    def critical(self, widget):
+        return False
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

themes/default.json

@@ -126,6 +126,9 @@
 		}
 	},
 	"caffeine": {
-		"states": { "activated": {"prefix": "   " }, "deactivated": { "prefix": "   " } }
+		"states": { "activated": {"prefix": " caf on " }, "deactivated": { "prefix": " caf off " } }
+	},
+	"xrandr": {
+		"states": { "on": { "prefix": " off "}, "off": { "prefix": " on "} }
 	}
 }

themes/gruvbox-powerline.json

@@ -159,5 +159,8 @@
 	},
 	"caffeine": {
 		"states": { "activated": {"prefix": "   " }, "deactivated": { "prefix": "   " } }
+	},
+	"xrandr": {
+		"states": { "on": { "prefix": "   "}, "off": { "prefix": "   "} }
 	}
 }

themes/powerline.json

@@ -158,5 +158,8 @@
 	},
 	"caffeine": {
 		"states": { "activated": {"prefix": "   " }, "deactivated": { "prefix": "   " } }
+	},
+	"xrandr": {
+		"states": { "on": { "prefix": "   "}, "off": { "prefix": "   "} }
 	}
 }

themes/solarized-powerline.json

@@ -159,5 +159,8 @@
 	},
 	"caffeine": {
 		"states": { "activated": {"prefix": "   " }, "deactivated": { "prefix": "   " } }
+	},
+	"xrandr": {
+		"states": { "on": { "prefix": "   "}, "off": { "prefix": "   "} }
 	}
 }

themes/solarized.json

@@ -152,5 +152,8 @@
 	},
 	"caffeine": {
 		"states": { "activated": {"prefix": " caf on " }, "deactivated": { "prefix": " caf off " } }
+	},
+	"xrandr": {
+		"states": { "on": { "prefix": " off "}, "off": { "prefix": " on "} }
 	}
 }