+ ev = badge_event_wait();
+ switch(badge_event_type(ev)) {
+ case BADGE_EVENT_USER_INPUT:
+ {
+ uint8_t old_state = badge_event_old_input_state(ev);
+ uint8_t new_state = badge_event_new_input_state(ev);
+ uint8_t new_buttons = new_state & (old_state ^ new_state);
+
+ if(new_buttons & (BADGE_EVENT_KEY_BTN_A | BADGE_EVENT_KEY_BTN_B)) {
+ return selected;
+ } else if((new_buttons & BADGE_EVENT_KEY_UP )) {
+ scroll_direction = -1;
+ } else if((new_buttons & BADGE_EVENT_KEY_DOWN)) {
+ scroll_direction = 1;
+ } else {
+ scroll_direction = 0;
+ }
+
+ scroll_ticks = 0;
+ break;
+ }
+ case BADGE_EVENT_GAME_TICK:
+ {
+ --scroll_ticks;
+ break;
+ }
+ }
+ }
+}
+
+void badge_scroll_text(char const *const *lines, size_t n) {
+ size_t first_visible = 0;
+ int scroll_direction = 0;
+ unsigned scroll_ticks = 0;
+
+ for(;;) {
+ if(scroll_ticks == 0) {
+ if (scroll_direction == 1 && first_visible + MENU_ENTRIES_VISIBLE < n) {
+ ++first_visible;
+ } else if(scroll_direction == -1 && first_visible != 0) {
+ --first_visible;
+ }
+
+ badge_menu_show(lines, n, &first_visible, first_visible + (first_visible + 1 == n ? 0 : 1), ' ');