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lib: use GDK_SCROLL_SMOOTH to enumlate wheel scroll

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It's really annoying when a touchpad doesn't work at all in a MKS session.
So instead of doing nothing, at least try to send a wheel event so that
some amount of scroll may occur.

Eventually, we need a real touchpad D-Bus interface to deliver events.
This commit is contained in:
Christian Hergert 2023-02-17 11:49:33 -08:00
parent d0909732f4
commit 87a800510b
1 changed files with 25 additions and 1 deletions
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26
lib/mks-display-picture.c
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@ -355,9 +355,33 @@ mks_display_picture_legacy_event_cb (MksDisplayPicture *self,
button = MKS_MOUSE_BUTTON_WHEEL_DOWN;
break;
case GDK_SCROLL_SMOOTH:
{
double delta_x;
double delta_y;
/*
* Currently there is no touchpad D-Bus interface to communicate
* with Qemu. That is something we would very much want to have
* in the future so that we can do this properly.
*
* For now, we just "emulate" scroll events by looking at direction
* and sending that across as wheel events. It's enough to be useful
* but far from what we would really want in the long run.
*/
gdk_scroll_event_get_deltas (event, &delta_x, &delta_y);
if (delta_y < 0)
button = MKS_MOUSE_BUTTON_WHEEL_DOWN;
else if (delta_y > 0)
button = MKS_MOUSE_BUTTON_WHEEL_UP;
break;
}
case GDK_SCROLL_LEFT:
case GDK_SCROLL_RIGHT:
case GDK_SCROLL_SMOOTH:
default:
break;
}