kconfig: nconf: Use TAB to cycle thru dialog buttons

Add the ability to cycle through dialog buttons with the TAB key.

Signed-off-by: Thorsten Blum <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

Author: toblux

scripts/kconfig/nconf.gui.c

@@ -277,6 +277,15 @@ int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
 		case KEY_RIGHT:
 			menu_driver(menu, REQ_RIGHT_ITEM);
 			break;
+		case 9: /* TAB */
+			if (btn_num > 1) {
+				/* cycle through buttons */
+				if (item_index(current_item(menu)) == btn_num - 1)
+					menu_driver(menu, REQ_FIRST_ITEM);
+				else
+					menu_driver(menu, REQ_NEXT_ITEM);
+			}
+			break;
 		case 10: /* ENTER */
 		case 27: /* ESCAPE */
 		case ' ':