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Enable windows to register to get notified when the mouse wheel is scrolled

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This commit is contained in:
David Eklov 2016-07-11 23:15:23 -05:00
parent 250ddc66c6
commit c0b7610c26
2 changed files with 29 additions and 1 deletions
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9
include/client/window.h
View file

@ -27,11 +27,20 @@ struct cursor {
struct wl_poitner *pointer; struct wl_poitner *pointer;
}; };
enum scroll_direction {
SCROLL_UP,
SCROLL_DOWN,
SCROLL_LEFT,
SCROLL_RIGHT,
};
struct pointer_input { struct pointer_input {
int last_x; int last_x;
int last_y; int last_y;
void (*notify_button)(struct window *window, int x, int y, uint32_t button); void (*notify_button)(struct window *window, int x, int y, uint32_t button);
void (*notify_scroll)(struct window *window, enum scroll_direction direction);
}; };
struct window { struct window {

21
wayland/window.c
View file

@ -47,7 +47,26 @@ static void pointer_handle_button(void *data, struct wl_pointer *pointer, uint32
} }
static void pointer_handle_axis(void *data, struct wl_pointer *pointer, static void pointer_handle_axis(void *data, struct wl_pointer *pointer,
uint32_t time, uint32_t axis, wl_fixed_t value) { uint32_t time, uint32_t axis, wl_fixed_t value) {
struct window *window = data;
enum scroll_direction direction;
switch (axis) {
case 0:
direction = wl_fixed_to_double(value) < 0 ? SCROLL_UP : SCROLL_DOWN;
break;
case 1:
direction = wl_fixed_to_double(value) < 0 ? SCROLL_LEFT : SCROLL_RIGHT;
break;
default:
if (!sway_assert(false, "Unexpected axis value")) {
return;
}
}
if (window->pointer_input.notify_scroll) {
window->pointer_input.notify_scroll(window, direction);
}
} }
static const struct wl_pointer_listener pointer_listener = { static const struct wl_pointer_listener pointer_listener = {