Eben specification and the new B3 keyboard (marco)

NEWS

@@ -1,3 +1,6 @@
+* #958, #1433 Refactor brightness and volume key handling to follow
+Eben specification and the new B3 keyboard (marco)
+
 Snapshot fd7336c2f1
 
 * Suppress traceback when creating a new buddy object on buddy-disappeared

shell/hardware/hardwaremanager.py

@@ -48,6 +48,17 @@ class HardwareManager(object):
             if track.flags & gst.interfaces.MIXER_TRACK_MASTER:
                 self._master = track
 
+    def get_volume(self):
+        if not self._mixer or not self._master:
+            logging.error('Cannot get the volume')
+            return self._convert_volume(0)
+
+        max_volume = self._master.max_volume
+        min_volume = self._master.min_volume
+        volume = self._mixer.get_volume(self._master)[0]
+
+        return volume * 100.0 / (max_volume - min_volume) + min_volume
+
     def set_volume(self, volume):
         if not self._mixer or not self._master:
             logging.error('Cannot set the volume')
@@ -59,7 +70,7 @@ class HardwareManager(object):
         max_volume = self._master.max_volume
         min_volume = self._master.min_volume
 
-        volume = (volume / 100.0) * (max_volume - min_volume) + min_volume
+        volume = volume * (max_volume - min_volume) / 100.0 + min_volume
         volume_list = [ volume ] * self._master.num_channels
 
         self._mixer.set_volume(self._master, tuple(volume_list))
@@ -83,10 +94,18 @@ class HardwareManager(object):
 
     def set_display_brightness(self, level):
         if not self._service:
+            logging.error('Cannot set display brightness')
             return
 
         self._service.set_display_brightness(level)
 
+    def get_display_brightness(self):
+        if not self._service:
+            logging.error('Cannot get display brightness')
+            return
+
+        return self._service.get_display_brightness()
+
     def toggle_keyboard_brightness(self):
         if not self._service:
             return

shell/view/keyhandler.py

@@ -26,22 +26,19 @@ from hardware import hardwaremanager
 from model.shellmodel import ShellModel
 from sugar._sugarext import KeyGrabber
 
+_BRIGHTNESS_STEP = 2
+_VOLUME_STEP = 10
+
 _actions_table = {
     'F1'            : 'zoom_mesh',
     'F2'            : 'zoom_friends',
     'F3'            : 'zoom_home',
     'F4'            : 'zoom_activity',
-    'F5'            : 'brightness_1',
-    'F6'            : 'brightness_2',
-    'F7'            : 'brightness_3',
-    'F8'            : 'brightness_4',
-    'F9'            : 'volume_1',
-    'F10'           : 'volume_2',
-    'F11'           : 'volume_3',
-    'F12'           : 'volume_4',
+    'F9'            : 'brightness_down',
+    'F10'           : 'brightness_up',
+    'F11'           : 'volume_down',
+    'F12'           : 'volume_up',
     '<alt>1'        : 'screenshot',
-    '<alt>F8'       : 'color_mode',
-    '<alt>F5'       : 'b_and_w_mode',
     '<alt>equal'    : 'console',
     '<alt>0'        : 'console',
     '<alt>f'        : 'frame',
@@ -72,17 +69,26 @@ class KeyHandler(object):
         for key in _actions_table.keys():
             self._key_grabber.grab(key)            
 
-    def _set_display_brightness(self, level):
+    def _change_volume(self, step):
+        hw_manager = hardwaremanager.get_manager()
+
+        volume = hw_manager.get_volume() + step
+        volume = min(max(0, volume), 100)
+
+        hw_manager.set_volume(volume)
+        hw_manager.set_mute(volume == 0)
+
+    def _change_brightness(self, step):
         hw_manager = hardwaremanager.get_manager()
+
+        level = hw_manager.get_display_brightness() + step
+        level = min(max(0, level), 15)
+
         hw_manager.set_display_brightness(level)
         if level == 0:
-            self._set_display_mode(hardwaremanager.B_AND_W_MODE)
+            hw_manager.set_display_mode(hardwaremanager.B_AND_W_MODE)
         else:
-            self._set_display_mode(hardwaremanager.COLOR_MODE)
-
-    def _set_display_mode(self, mode):
-        hw_manager = hardwaremanager.get_manager()
-        hw_manager.set_display_mode(mode)
+            hw_manager.set_display_mode(hardwaremanager.COLOR_MODE)
 
     def handle_zoom_mesh(self):
         self._shell.set_zoom_level(ShellModel.ZOOM_MESH)
@@ -96,46 +102,21 @@ class KeyHandler(object):
     def handle_zoom_activity(self):
         self._shell.set_zoom_level(ShellModel.ZOOM_ACTIVITY)
 
-    def handle_brightness_1(self):
-        self._set_display_brightness(0)
+    def handle_brightness_up(self):
+        self._change_brightness(_BRIGHTNESS_STEP)
 
-    def handle_brightness_2(self):
-        self._set_display_brightness(5)
+    def handle_brightness_down(self):
+        self._change_brightness(-_BRIGHTNESS_STEP)
 
-    def handle_brightness_3(self):
-        self._set_display_brightness(9)
+    def handle_volume_up(self):
+        self._change_volume(_VOLUME_STEP)
 
-    def handle_brightness_4(self):
-        self._set_display_brightness(15)
-
-    def handle_volume_1(self):
-        hw_manager = hardwaremanager.get_manager()
-        hw_manager.set_mute(True)
-
-    def handle_volume_2(self):
-        hw_manager = hardwaremanager.get_manager()
-        hw_manager.set_mute(False)
-        hw_manager.set_volume(50)
-
-    def handle_volume_3(self):
-        hw_manager = hardwaremanager.get_manager()
-        hw_manager.set_mute(False)
-        hw_manager.set_volume(80)
-
-    def handle_volume_4(self):
-        hw_manager = hardwaremanager.get_manager()
-        hw_manager.set_mute(False)
-        hw_manager.set_volume(100)
-
-    def handle_color_mode(self):
-        self._set_display_mode(hardwaremanager.COLOR_MODE)
+    def handle_volume_down(self):
+        self._change_volume(-_VOLUME_STEP)
 
     def handle_screenshot(self):
         self._shell.take_screenshot()
 
-    def handle_b_and_w_mode(self):
-        self._set_display_mode(hardwaremanager.B_AND_W_MODE)
-
     def handle_console(self):
         gobject.idle_add(self._toggle_console_visibility_cb)