diff options
| author | Peter Hutterer <peter.hutterer@who-t.net> | 2016-01-06 14:47:18 +1000 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2016-01-22 16:16:55 +1000 |
| commit | 108a191a3ec868c00e5ee72be383b437894b2fc5 (patch) | |
| tree | 561e4575c75b0dc3619cad36199d448ff88bd392 /src/libinput.c | |
| parent | 91a568d1a1339829f4e3969bde3a4935fef9542b (diff) | |
tablet: add support for relative x/y motion deltas
Instead of an explicit tablet mode that device must be changed into, let the
caller decide which coordinates are preferred. The tablet mode may be
application-specific and usually depends on the tool as well.
This patch adds an interface to get a motion delta for the x/y axes in
pixel-like coordinates. libinput provides some magic to convert the tablet
data into something that resembles pixels from a mouse motion.
For unaccelerated relative motion, the caller should use the mm values from
the tablet and calculate deltas manually.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Jason Gerecke <jason.gerecke@wacom.com>
Diffstat (limited to 'src/libinput.c')
| -rw-r--r-- | src/libinput.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/libinput.c b/src/libinput.c index 2f80f039..a0dc6d68 100644 --- a/src/libinput.c +++ b/src/libinput.c @@ -1090,6 +1090,32 @@ libinput_event_tablet_tool_get_y(struct libinput_event_tablet_tool *event) } LIBINPUT_EXPORT double +libinput_event_tablet_tool_get_dx(struct libinput_event_tablet_tool *event) +{ + require_event_type(libinput_event_get_context(&event->base), + event->base.type, + 0, + LIBINPUT_EVENT_TABLET_TOOL_AXIS, + LIBINPUT_EVENT_TABLET_TOOL_TIP, + LIBINPUT_EVENT_TABLET_TOOL_PROXIMITY); + + return event->axes.delta.x; +} + +LIBINPUT_EXPORT double +libinput_event_tablet_tool_get_dy(struct libinput_event_tablet_tool *event) +{ + require_event_type(libinput_event_get_context(&event->base), + event->base.type, + 0, + LIBINPUT_EVENT_TABLET_TOOL_AXIS, + LIBINPUT_EVENT_TABLET_TOOL_TIP, + LIBINPUT_EVENT_TABLET_TOOL_PROXIMITY); + + return event->axes.delta.y; +} + +LIBINPUT_EXPORT double libinput_event_tablet_tool_get_pressure(struct libinput_event_tablet_tool *event) { require_event_type(libinput_event_get_context(&event->base), |