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Add an input device function to convert keycodes to evdev codes

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This adds a virtual function to ClutterInputDevice to translate a
keycode from the hardware_keycode member of ClutterKeyEvent to an
evdev keycode. The function can fail so that input backends that don't
have a sensible way to translate to evdev keycodes can return FALSE.
There are implementations for evdev, wayland and X. The X
implementation assumes that the X server is using an evdev driver in
which case the hardware keycodes are the evdev codes plus 8.

Reviewed-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Neil Roberts
2012-01-17 15:40:08 +00:00
parent a3bbcff946
commit 13e3f9e5f1
8 changed files with 93 additions and 0 deletions
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31
clutter/clutter-input-device.c
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@ -1410,3 +1410,34 @@ _clutter_input_device_select_stage_events (ClutterInputDevice *device,
if (device_class->select_stage_events != NULL)
device_class->select_stage_events (device, stage, event_mask);
}
/**
* clutter_input_device_keycode_to_evdev:
* @device: A #ClutterInputDevice
* @hardware_keycode: The hardware keycode from a #ClutterKeyEvent
* @evdev_keycode: The return location for the evdev keycode
*
* Translates a hardware keycode from a #ClutterKeyEvent to the
* equivalent evdev keycode. Note that depending on the input backend
* used by Clutter this function can fail if there is no obvious
* mapping between the key codes. The hardware keycode can be taken
* from the hardware_keycode member of #ClutterKeyEvent.
*
* Return value: %TRUE if the conversion succeeded, %FALSE otherwise.
* Since: 1.10
*/
gboolean
clutter_input_device_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode)
{
ClutterInputDeviceClass *device_class;
device_class = CLUTTER_INPUT_DEVICE_GET_CLASS (device);
if (device_class->keycode_to_evdev == NULL)
return FALSE;
else
return device_class->keycode_to_evdev (device,
hardware_keycode,
evdev_keycode);
}