Import combined Enhanced viewport: zoom out, overlays & tooltips (r53_27127) patch

https://www.tt-forums.net/viewtopic.php?f=33&t=53394

src/widgets/plans_widget.h

@@ -0,0 +1,27 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file plans_widget.h Types related to the plans widgets. */
+
+#ifndef WIDGETS_PLANS_WIDGET_H
+#define WIDGETS_PLANS_WIDGET_H
+
+/** Widgets of the #PlansWindow class. */
+enum PlansWidgets {
+	WID_PLN_CAPTION,        ///< Caption of the window.
+	WID_PLN_LIST,
+	WID_PLN_SCROLLBAR,
+	WID_PLN_NEW,
+	WID_PLN_ADD_LINES,
+	WID_PLN_VISIBILITY,
+	WID_PLN_HIDE_ALL,
+	WID_PLN_DELETE,
+};
+
+#endif /* WIDGETS_PLANS_WIDGET_H */