Settings GUI: Add support for DECIMAL1 settings.

src/settings_gui.cpp

@@ -2258,8 +2258,13 @@ struct GameSettingsWindow : Window {
 				if (sd->desc.flags & SGF_CURRENCY) value *= _currency->rate;
 
 				this->valuewindow_entry = pe;
-				SetDParam(0, value);
-				ShowQueryString(STR_JUST_INT, STR_CONFIG_SETTING_QUERY_CAPTION, 10, this, CS_NUMERAL, QSF_ENABLE_DEFAULT);
+				if (sd->desc.flags & SGF_DECIMAL1) {
+					SetDParam(0, value);
+					ShowQueryString(STR_JUST_DECIMAL1, STR_CONFIG_SETTING_QUERY_CAPTION, 10, this, CS_NUMERAL_DECIMAL, QSF_ENABLE_DEFAULT);
+				} else {
+					SetDParam(0, value);
+					ShowQueryString(STR_JUST_INT, STR_CONFIG_SETTING_QUERY_CAPTION, 10, this, CS_NUMERAL, QSF_ENABLE_DEFAULT);
+				}
 			}
 			this->SetDisplayedHelpText(pe);
 		}
@@ -2284,7 +2289,11 @@ struct GameSettingsWindow : Window {
 
 		int32 value;
 		if (!StrEmpty(str)) {
-			value = atoi(str);
+			if (sd->desc.flags & SGF_DECIMAL1) {
+				value = atof(str) * 10;
+			} else {
+				value = atoi(str);
+			}
 
 			/* Save the correct currency-translated value */
 			if (sd->desc.flags & SGF_CURRENCY) value /= _currency->rate;

src/settings_internal.h

@@ -48,6 +48,7 @@ enum SettingGuiFlagLong {
 	SGF_NEWGAME_ONLY = 1 << 6, ///< this setting cannot be changed in a game
 	SGF_SCENEDIT_TOO = 1 << 7, ///< this setting can be changed in the scenario editor (only makes sense when SGF_NEWGAME_ONLY is set)
 	SGF_PER_COMPANY  = 1 << 8, ///< this setting can be different for each company (saved in company struct)
+	SGF_DECIMAL1     = 1 << 9, ///< display a decimal representation of the setting value divided by 10
 };
 DECLARE_ENUM_AS_BIT_SET(SettingGuiFlagLong)
 typedef SimpleTinyEnumT<SettingGuiFlagLong, uint16> SettingGuiFlag;