Codechange: Replace SF_GUI_NEGATIVE_IS_SPECIAL with a settings value callback.

src/settings.cpp

@@ -480,9 +480,6 @@ void IntSettingDesc::SetValueDParams(uint first_param, int32_t value) const
 	} else {
 		if ((this->flags & SF_GUI_DROPDOWN) != 0) {
 			SetDParam(first_param++, this->str_val - this->min + value);
-		} else if ((this->flags & SF_GUI_NEGATIVE_IS_SPECIAL) != 0) {
-			SetDParam(first_param++, this->str_val + ((value >= 0) ? 1 : 0));
-			value = abs(value);
 		} else {
 			SetDParam(first_param++, this->str_val + ((value == 0 && (this->flags & SF_GUI_0_IS_SPECIAL) != 0) ? 1 : 0));
 		}

src/settings_internal.h

@@ -16,7 +16,6 @@
 enum SettingFlag : uint16_t {
 	SF_NONE = 0,
 	SF_GUI_0_IS_SPECIAL        = 1 <<  0, ///< A value of zero is possible and has a custom string (the one after "strval").
-	SF_GUI_NEGATIVE_IS_SPECIAL = 1 <<  1, ///< A negative value has another string (the one after "strval").
 	SF_GUI_DROPDOWN            = 1 <<  2, ///< The value represents a limited number of string-options (internally integer) presented as dropdown.
 	SF_GUI_CURRENCY            = 1 <<  3, ///< The number represents money, so when reading value multiply by exchange rate.
 	SF_NETWORK_ONLY            = 1 <<  4, ///< This setting only applies to network games.

src/settings_table.cpp

@@ -108,6 +108,13 @@ static void SettingsValueVelocityUnit(const IntSettingDesc &, uint first_param,
 	SetDParam(first_param, val);
 }
 
+/** A negative value has another string (the one after "strval"). */
+static void SettingsValueAbsolute(const IntSettingDesc &sd, uint first_param, int32_t value)
+{
+	SetDParam(first_param, sd.str_val + ((value >= 0) ? 1 : 0));
+	SetDParam(first_param + 1, abs(value));
+}
+
 /** Reposition the main toolbar as the setting changed. */
 static void v_PositionMainToolbar(int32_t)
 {

src/table/settings/company_settings.ini

@@ -11,6 +11,7 @@
 static void UpdateAllServiceInterval(int32_t new_value);
 static bool CanUpdateServiceInterval(VehicleType type, int32_t &new_value);
 static void UpdateServiceInterval(VehicleType type, int32_t new_value);
+static void SettingsValueAbsolute(const IntSettingDesc &sd, uint first_param, int32_t value);
 
 static const SettingVariant _company_settings_table[] = {
 [post-amble]
@@ -52,13 +53,14 @@ cat      = SC_BASIC
 [SDT_VAR]
 var      = engine_renew_months
 type     = SLE_INT16
-flags    = SF_PER_COMPANY | SF_GUI_NEGATIVE_IS_SPECIAL
+flags    = SF_PER_COMPANY
 def      = 6
 min      = -12
 max      = 12
 str      = STR_CONFIG_SETTING_AUTORENEW_MONTHS
 strhelp  = STR_CONFIG_SETTING_AUTORENEW_MONTHS_HELPTEXT
 strval   = STR_CONFIG_SETTING_AUTORENEW_MONTHS_VALUE_BEFORE
+val_cb   = SettingsValueAbsolute
 
 [SDT_VAR]
 var      = engine_renew_money