Function wlc_sys::wlc_set_pointer_button_cb

pub unsafe extern "C" fn wlc_set_pointer_button_cb(
    cb: Option<unsafe extern "C" fn(_: wlc_handle, _: u32, _: *const wlc_modifiers, _: u32, _: wlc_button_state, _: *const wlc_point) -> bool>
)

Button event was triggered, view handle will be zero if there was no focus. Return true to prevent sending the event to clients.