diff options
| author | Dima Kogan <dkogan@cds.caltech.edu> | 2009-12-05 02:05:19 -0800 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2009-12-08 11:02:05 +1000 |
| commit | d6beb16be26df65cd65eaeb146fde0d355521535 (patch) | |
| tree | 7484a5879e841f7261c84cc36361ec403a7a01c9 /src/emuWheel.c | |
| parent | 2f5a0fb6988809a91c4e6821aaed46ba27c9855c (diff) | |
allow wheel emulation to work with absolute-position devices
Signed-off-by: Dima Kogan <dkogan@cds.caltech.edu>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Diffstat (limited to 'src/emuWheel.c')
| -rw-r--r-- | src/emuWheel.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/emuWheel.c b/src/emuWheel.c index e7b2f98..3f0dfd4 100644 --- a/src/emuWheel.c +++ b/src/emuWheel.c @@ -100,6 +100,7 @@ EvdevWheelEmuFilterMotion(InputInfoPtr pInfo, struct input_event *pEv) EvdevPtr pEvdev = (EvdevPtr)pInfo->private; WheelAxisPtr pAxis = NULL, pOtherAxis = NULL; int value = pEv->value; + int oldValue; /* Has wheel emulation been configured to be enabled? */ if (!pEvdev->emulateWheel.enabled) @@ -118,12 +119,21 @@ EvdevWheelEmuFilterMotion(InputInfoPtr pInfo, struct input_event *pEv) } /* We don't want to intercept real mouse wheel events */ + if(pEv->type == EV_ABS) { + oldValue = pEvdev->vals[pEvdev->axis_map[pEv->code]]; + pEvdev->vals[pEvdev->axis_map[pEv->code]] = value; + value -= oldValue; /* make value into a differential measurement */ + } + switch(pEv->code) { + + /* ABS_X has the same value as REL_X, so this case catches both */ case REL_X: pAxis = &(pEvdev->emulateWheel.X); pOtherAxis = &(pEvdev->emulateWheel.Y); break; + /* ABS_Y has the same value as REL_Y, so this case catches both */ case REL_Y: pAxis = &(pEvdev->emulateWheel.Y); pOtherAxis = &(pEvdev->emulateWheel.X); @@ -133,11 +143,11 @@ EvdevWheelEmuFilterMotion(InputInfoPtr pInfo, struct input_event *pEv) break; } - /* If we found REL_X or REL_Y, emulate a mouse wheel. - Reset the inertia of the other axis when a scroll event was sent - to avoid the buildup of erroneous scroll events if the user - doesn't move in a perfectly straight line. - */ + /* If we found REL_X, REL_Y, ABS_X or ABS_Y then emulate a mouse + wheel. Reset the inertia of the other axis when a scroll event + was sent to avoid the buildup of erroneous scroll events if the + user doesn't move in a perfectly straight line. + */ if (pAxis) { if (EvdevWheelEmuInertia(pInfo, pAxis, value)) |