From 310258f2834693e2794c1e6fbe88ba9cca2af77a Mon Sep 17 00:00:00 2001
From: frosch <frosch@openttd.org>
Date: Sat, 14 Feb 2015 21:55:30 +0000
Subject: (svn r27151) -Add: Allow changing max heightlevel in scenario editor.

---
 src/settings.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'src/settings.cpp')

diff --git a/src/settings.cpp b/src/settings.cpp
index e2baed5ba..9dc08ecc1 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1277,6 +1277,27 @@ static bool ChangeDynamicEngines(int32 p1)
 	return true;
 }
 
+static bool ChangeMaxHeightLevel(int32 p1)
+{
+	if (_game_mode == GM_NORMAL) return false;
+	if (_game_mode != GM_EDITOR) return true;
+
+	/* Check if at least one mountain on the map is higher than the new value.
+	 * If yes, disallow the change. */
+	for (TileIndex t = 0; t < MapSize(); t++) {
+		if ((int32)TileHeight(t) > p1) {
+			ShowErrorMessage(STR_CONFIG_SETTING_TOO_HIGH_MOUNTAIN, INVALID_STRING_ID, WL_ERROR);
+			/* Return old, unchanged value */
+			return false;
+		}
+	}
+
+	/* The smallmap uses an index from heightlevels to colours. Trigger rebuilding it. */
+	InvalidateWindowClassesData(WC_SMALLMAP, 2);
+
+	return true;
+}
+
 static bool StationCatchmentChanged(int32 p1)
 {
 	Station::RecomputeIndustriesNearForAll();
-- 
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