Merge pull request #346 from malverick/brightness

Linux Brightness API

README.rst

@@ -45,7 +45,7 @@ Flash                              X       X
 Wifi                                           X       X    X
 Temperature                        X
 Spatial Orientation                X
-Brightness                         X
+Brightness                         X       X                X
 ================================== ======= === ======= ==== =====
 
 Support

examples/brightness/main.py

@@ -16,7 +16,7 @@
         min: 0
         max: 100
         value: root.get_current_brightness()
-        on_touch_up: root.set_brightness(slider.value)
+        on_value: root.set_brightness(slider.value)
     Label:
         text: 'Current brightness = ' + str(slider.value)
 ''')

plyer/platforms/linux/brightness.py

@@ -0,0 +1,29 @@
+'''
+Linux Brightness
+----------------
+
+'''
+
+from plyer.facades import Brightness
+import subprocess
+import os
+
+
+class LinuxBrightness(Brightness):
+
+    def __init__(self):
+        if os.system("which xbacklight"):
+            raise Exception(
+                "It seems that 'xbacklight' is not installed. \
+Install it using 'sudo apt-get install xbacklight'.")
+
+    def _current_level(self):
+        cr_level = subprocess.check_output(["xbacklight", "-get"])
+        return str(cr_level)
+
+    def _set_level(self, level):
+        subprocess.call(["xbacklight", "-set", str(level)])
+
+
+def instance():
+    return LinuxBrightness()