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input: implement support for mouse wheel left/right

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We now emit button 6/7 events (when the client application grabs the
mouse). This buttons map to mouse wheel horizontal scroll events. Or, left/right
tilting, if you like.

Wayland report these as ‘axis’ events (just like regular scroll wheel events),
and thus we need to translate those scroll events to button events.

libinput does not define any mouse buttons for wheel tilts, so we add our own
defitions. These are added last in the BTN_* range, just before the BTN_JOYSTICK
events.
This commit is contained in:
Daniel Eklöf 2021-08-05 18:34:09 +02:00
parent 7a372a8c23
commit c2cc964116
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GPG key ID: 5BBD4992C116573F
5 changed files with 55 additions and 29 deletions
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21
terminal.c
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@ -28,6 +28,7 @@
#include "extract.h"
#include "grid.h"
#include "ime.h"
#include "input.h"
#include "notify.h"
#include "quirks.h"
#include "reaper.h"
@ -2743,14 +2744,16 @@ static int
linux_mouse_button_to_x(int button)
{
switch (button) {
case BTN_LEFT: return 1;
case BTN_MIDDLE: return 2;
case BTN_RIGHT: return 3;
case BTN_BACK: return 4;
case BTN_FORWARD: return 5;
case BTN_SIDE: return 8;
case BTN_EXTRA: return 9;
case BTN_TASK: return -1; /* TODO: ??? */
case BTN_LEFT: return 1;
case BTN_MIDDLE: return 2;
case BTN_RIGHT: return 3;
case BTN_BACK: return 4;
case BTN_FORWARD: return 5;
case BTN_WHEEL_LEFT: return 6; /* Foot custom define */
case BTN_WHEEL_RIGHT: return 7; /* Foot custom define */
case BTN_SIDE: return 8;
case BTN_EXTRA: return 9;
case BTN_TASK: return -1; /* TODO: ??? */
default:
LOG_WARN("unrecognized mouse button: %d (0x%x)", button, button);
@ -2881,7 +2884,7 @@ term_mouse_up(struct terminal *term, int button, int row, int col,
return;
if (xbutton == 4 || xbutton == 5) {
/* No release events for scroll buttons */
/* No release events for vertical scroll wheel buttons */
return;
}