[modules/xrandr] Add refresh widget when autoupdate==False

If polling displays via xrandr is disabled, show an additional widget
that allows the user to manually refresh the widget list.

see #359

bumblebee/modules/xrandr.py

@@ -58,12 +58,21 @@ class Module(bumblebee.engine.Module):
         for widget in new_widgets:
             widgets.append(widget)
 
+        if self._autoupdate == False:
+            widget = bumblebee.output.Widget(full_text="")
+            widget.set("state", "refresh")
+            self._engine.input.register_callback(widget, button=1, cmd=self._refresh)
+            widgets.append(widget)
+
     def update(self, widgets):
         self.update_widgets(widgets)
 
     def state(self, widget):
         return widget.get("state", "off")
 
+    def _refresh(self, event):
+        self._needs_update = True
+
     def _toggle(self, event):
         self._needs_update = True
         path = os.path.dirname(os.path.abspath(__file__))

themes/icons/ascii.json

@@ -77,7 +77,7 @@
 		"activated": {"prefix": "caf-on" }, "deactivated": { "prefix": "caf-off " }
 	},
 	"xrandr": {
-		"on": { "prefix": " off "}, "off": { "prefix": " on "}
+		"on": { "prefix": " off "}, "off": { "prefix": " on "}, "refresh": { "prefix": " refresh "}
 	},
 	"redshift": {
 		"day": { "prefix": "day" }, "night": { "prefix": "night" }, "transition": { "prefix": "trans" }

themes/icons/awesome-fonts.json

@@ -122,7 +122,8 @@
 	},
 	"xrandr": {
 		"on": { "prefix": " "},
-		"off": { "prefix": " " }
+		"off": { "prefix": " " },
+		"refresh": { "prefix": "" }
 	},
 	"redshift": {
 		"day": { "prefix": "" },