add scroll button option

This commit introduces a scroll_button option, which is intended to be
used with scroll_method. Now user can edit his sway config and add an
scroll_button option to device section.

1 files changed, 6 insertions, 0 deletions

diff --git a/sway/input/input-manager.c b/sway/input/input-manager.c
index daaf1fb6..b18989d0 100644
--- a/sway/input/input-manager.c
+++ b/sway/input/input-manager.c
@@ -158,6 +158,12 @@ static void input_manager_libinput_config_pointer(
                 libinput_device_config_accel_set_speed(libinput_device,
                         ic->pointer_accel);
         }
+        if (ic->scroll_button != INT_MIN) {
+                wlr_log(WLR_DEBUG, "libinput_config_pointer(%s) scroll_set_button(%d)",
+                        ic->identifier, ic->scroll_button);
+                libinput_device_config_scroll_set_button(libinput_device,
+                        ic->scroll_button);
+        }
         if (ic->scroll_method != INT_MIN) {
                 wlr_log(WLR_DEBUG, "libinput_config_pointer(%s) scroll_set_method(%d)",
                         ic->identifier, ic->scroll_method);