optimized redraw of menu items (458b60ef) · Commits · Chris / yahtc

menu.c

+19 −10

Original line number	Diff line number	Diff line
		@@ -11,12 +11,13 @@ char menu_prompt(const menu_item items, const unsigned int num_menu_items) {
		printf("\n"); // make downward room for the menu
		}
		char *selected_action = "";
		int hovered_item_changed = 1;
		unsigned int hovered_selection_index = 0;
		// menu logic! TODO make this cross platform (play nice with Windows...)
		do {
		// return cursor to menu top position
		if (hovered_item_changed) {
		for (int i = 0; i < num_menu_items; i++) {
		// todo to optimize, only do the erasure part if the hover selection changes
		printf("\033[A"); // move cursor up one line
		printf("\033[2K"); // clear entire line
		}
		@@ -28,6 +29,7 @@ char menu_prompt(const menu_item items, const unsigned int num_menu_items) {
		}
		printf("%s\n", items[i].title);
		}
		}

		enum MENU_DIRECTION direction = get_direction();

		@@ -35,17 +37,24 @@ char menu_prompt(const menu_item items, const unsigned int num_menu_items) {
		case DOWN:
		if (hovered_selection_index < num_menu_items - 1) {
		hovered_selection_index++;
		hovered_item_changed = 1;
		} else {
		hovered_item_changed = 0;
		}
		break;
		case UP:
		if (hovered_selection_index > 0) {
		hovered_selection_index--;
		hovered_item_changed = 1;
		} else {
		hovered_item_changed = 0;
		}
		break;
		case SELECT:
		selected_action = items[hovered_selection_index].command; // choose the hovered + selected item
		break;
		default:
		hovered_item_changed = 0;
		break;
		}
		} while (strcasecmp(selected_action, "") == 0);