- allow specifying a custom class for message box display.

src/gi.cpp

@@ -371,6 +371,7 @@ void FMapInfoParser::ParseGameInfo()
 		GAMEINFOKEY_STRING_STAMPED(statusbarclass, "statusbarclass", statusbarclassfile)
 		GAMEINFOKEY_MUSIC(intermissionMusic, intermissionOrder, "intermissionMusic")
 		GAMEINFOKEY_STRING(CursorPic, "CursorPic")
+		GAMEINFOKEY_STRING(MessageBoxClass, "MessageBoxClass")
 		GAMEINFOKEY_BOOL(noloopfinalemusic, "noloopfinalemusic")
 		GAMEINFOKEY_BOOL(drawreadthis, "drawreadthis")
 		GAMEINFOKEY_BOOL(swapmenu, "swapmenu")

src/gi.h

@@ -152,6 +152,7 @@ struct gameinfo_t
 	int statusbarfile = -1;
 	FName statusbarclass;
 	int statusbarclassfile = -1;
+	FName MessageBoxClass;
 	FName backpacktype;
 	FString intermissionMusic;
 	int intermissionOrder;

src/menu/messagebox.cpp

@@ -66,14 +66,18 @@ DEFINE_ACTION_FUNCTION(DMessageBoxMenu, CallHandler)
 
 DMenu *CreateMessageBoxMenu(DMenu *parent, const char *message, int messagemode, bool playsound, FName action = NAME_None, hfunc handler = nullptr)
 {
-	auto c = PClass::FindClass("MessageBoxMenu");
+	auto c = PClass::FindClass(gameinfo.MessageBoxClass);
+	if (!c->IsDescendantOf(NAME_MessageBoxMenu)) c = PClass::FindClass(NAME_MessageBoxMenu);
 	auto p = c->CreateNew();
 	FString namestr = message;
-	VMValue params[] = { p, parent, &namestr, messagemode, playsound, action.GetIndex(), reinterpret_cast<void*>(handler) };
 
-	auto f = dyn_cast<PFunction>(c->FindSymbol("Init", false));
-	VMCall(f->Variants[0].Implementation, params, countof(params), nullptr, 0);
+	IFVIRTUALPTRNAME(p, NAME_MessageBoxMenu, Init)
+	{
+		VMValue params[] = { p, parent, &namestr, messagemode, playsound, action.GetIndex(), reinterpret_cast<void*>(handler) };
+		VMCall(func, params, countof(params), nullptr, 0);
 		return (DMenu*)p;
+	}
+	return nullptr;
 }
 
 //=============================================================================

src/namedef.h

@@ -912,3 +912,4 @@ xx(StaticArray)
 xx(DynArray)
 xx(Struct)
 xx(ReflectType)
+xx(MessageBoxMenu)

wadsrc/static/mapinfo/chex.txt

@@ -68,6 +68,7 @@ gameinfo
 	statscreen_coop = "CoopStatusScreen"
 	statscreen_dm = "DeathmatchStatusScreen"
 	statscreen_single = "DoomStatusScreen"
+	messageboxclass = "MessageBoxMenu"
 }
 
 DoomEdNums

wadsrc/static/mapinfo/doomcommon.txt

@@ -69,6 +69,7 @@ gameinfo
 	statscreen_coop = "CoopStatusScreen"
 	statscreen_dm = "DeathmatchStatusScreen"
 	statscreen_single = "DoomStatusScreen"
+	messageboxclass = "MessageBoxMenu"
 }
 
 spawnnums

wadsrc/static/mapinfo/heretic.txt

@@ -67,6 +67,7 @@ gameinfo
 	statscreen_coop = "CoopStatusScreen"
 	statscreen_dm = "DeathmatchStatusScreen"
 	statscreen_single = "RavenStatusScreen"
+	messageboxclass = "MessageBoxMenu"
 }
 
 DoomEdNums

wadsrc/static/mapinfo/hexen.txt

@@ -65,6 +65,7 @@ gameinfo
 	statscreen_coop = "CoopStatusScreen"
 	statscreen_dm = "DeathmatchStatusScreen"
 	statscreen_single = "RavenStatusScreen"
+	messageboxclass = "MessageBoxMenu"
 }
 
 DoomEdNums

wadsrc/static/mapinfo/mindefaults.txt

@@ -53,6 +53,7 @@ gameinfo
 	statscreen_mapnamefont = "BigFont"
 	statscreen_finishedpatch = "WIF"
 	statscreen_enteringpatch = "WIENTER"
+	messageboxclass = "MessageBoxMenu"
 }
 
 DoomEdNums

wadsrc/static/mapinfo/strife.txt

@@ -67,6 +67,7 @@ gameinfo
 	statscreen_dm = "DeathmatchStatusScreen"
 	statscreen_single = "RavenStatusScreen"
 	statusbarclass = "StrifeStatusBar"
+	messageboxclass = "MessageBoxMenu"
 }
 
 DoomEdNums

wadsrc/static/zscript/menu/messagebox.txt

@@ -50,7 +50,7 @@ class MessageBoxMenu : Menu
 	//
 	//=============================================================================
 
-	void Init(Menu parent, String message, int messagemode, bool playsound = false, Name cmd = 'None', voidptr native_handler = null)
+	virtual void Init(Menu parent, String message, int messagemode, bool playsound = false, Name cmd = 'None', voidptr native_handler = null)
 	{
 		Super.Init(parent);
 		mAction = cmd;