XLibre/xf86-input-evdev
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Support smooth scrolling on REL_WHEEL, REL_HWHEEL and REL_DIAL

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Automatic smooth scrolling setup for these axes, with REL_WHEEL and REL_DIAL
both mapping into vscrolling. REL_WHEEL is the preferred axis.

Mouse wheel emulation is not yet updated for smooth scrolling.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
This commit is contained in:
Peter Hutterer
2011-08-19 11:15:09 +10:00
parent 070f30e089
commit b450efdf95
2 changed files with 20 additions and 1 deletions
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17
src/evdev.c
View File

@@ -267,10 +267,12 @@ SetXkbOption(InputInfoPtr pInfo, char *name, char **option)
}
}
#ifndef HAVE_SMOOTH_SCROLLING
static int wheel_up_button = 4;
static int wheel_down_button = 5;
static int wheel_left_button = 6;
static int wheel_right_button = 7;
#endif
static EventQueuePtr
EvdevNextInQueue(InputInfoPtr pInfo)
@@ -590,6 +592,7 @@ EvdevProcessRelativeMotionEvent(InputInfoPtr pInfo, struct input_event *ev)
value = ev->value;
switch (ev->code) {
#ifndef HAVE_SMOOTH_SCROLLING
case REL_WHEEL:
if (value > 0)
EvdevQueueButtonClicks(pInfo, wheel_up_button, value);
@@ -604,8 +607,8 @@ EvdevProcessRelativeMotionEvent(InputInfoPtr pInfo, struct input_event *ev)
else if (value < 0)
EvdevQueueButtonClicks(pInfo, wheel_left_button, -value);
break;
/* We don't post wheel events as axis motion. */
#endif
default:
/* Ignore EV_REL events if we never set up for them. */
if (!(pEvdev->flags & EVDEV_RELATIVE_EVENTS))
@@ -1100,6 +1103,7 @@ EvdevAddRelValuatorClass(DeviceIntPtr device)
if (num_axes < 1)
goto out;
#ifndef HAVE_SMOOTH_SCROLLING
/* Wheels are special, we post them as button events. So let's ignore them
* in the axes list too */
if (TestBit(REL_WHEEL, pEvdev->rel_bitmask))
@@ -1111,6 +1115,7 @@ EvdevAddRelValuatorClass(DeviceIntPtr device)
if (num_axes <= 0)
goto out;
#endif
if (num_axes > MAX_VALUATORS) {
xf86IDrvMsg(pInfo, X_WARNING, "found %d axes, limiting to %d.\n", num_axes, MAX_VALUATORS);
@@ -1128,9 +1133,11 @@ EvdevAddRelValuatorClass(DeviceIntPtr device)
for (axis = REL_X; i < MAX_VALUATORS && axis <= REL_MAX; axis++)
{
pEvdev->axis_map[axis] = -1;
#ifndef HAVE_SMOOTH_SCROLLING
/* We don't post wheel events, so ignore them here too */
if (axis == REL_WHEEL || axis == REL_HWHEEL || axis == REL_DIAL)
continue;
#endif
if (!TestBit(axis, pEvdev->rel_bitmask))
continue;
pEvdev->axis_map[axis] = i;
@@ -1160,6 +1167,14 @@ EvdevAddRelValuatorClass(DeviceIntPtr device)
xf86InitValuatorAxisStruct(device, axnum, atoms[axnum], -1, -1, 1, 0, 1,
Relative);
xf86InitValuatorDefaults(device, axnum);
#ifdef HAVE_SMOOTH_SCROLLING
if (axis == REL_WHEEL)
SetScrollValuator(device, axnum, SCROLL_TYPE_VERTICAL, -1.0, SCROLL_FLAG_PREFERRED);
else if (axis == REL_DIAL)
SetScrollValuator(device, axnum, SCROLL_TYPE_VERTICAL, -1.0, SCROLL_FLAG_NONE);
else if (axis == REL_HWHEEL)
SetScrollValuator(device, axnum, SCROLL_TYPE_HORIZONTAL, -1.0, SCROLL_FLAG_NONE);
#endif
}
free(atoms);

4
src/evdev.h
View File

@@ -55,6 +55,10 @@
#define LED_CNT (LED_MAX+1)
#endif
#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) >= 14
#define HAVE_SMOOTH_SCROLLING 1
#endif
#define EVDEV_MAXBUTTONS 32
#define EVDEV_MAXQUEUE 32