GetAsyncKeyState: Implement more keys

Author: glebm

SourceX/miniwin/misc_msg.cpp

@@ -701,18 +701,42 @@ WINBOOL TranslateMessage(const MSG *lpMsg)
 SHORT GetAsyncKeyState(int vKey)
 {
 #ifndef USE_SDL1
-	const Uint8 *state = SDL_GetKeyboardState(NULL);
-	if (vKey == DVL_VK_SHIFT) {
-		if (state[SDL_SCANCODE_LSHIFT] || state[SDL_SCANCODE_RSHIFT]) {
-			return 0x8000;
-		}
+	const Uint8 *state = SDL_GetKeyboardState(nullptr);
+	switch (vKey) {
+	case DVL_VK_SHIFT:
+		return state[SDL_SCANCODE_LSHIFT] || state[SDL_SCANCODE_RSHIFT] ? 0x8000 : 0;
+	case DVL_VK_MENU:
+		return state[SDL_SCANCODE_MENU] ? 0x8000 : 0;
+	case DVL_VK_LEFT:
+		return state[SDL_SCANCODE_LEFT] ? 0x8000 : 0;
+	case DVL_VK_UP:
+		return state[SDL_SCANCODE_UP] ? 0x8000 : 0;
+	case DVL_VK_RIGHT:
+		return state[SDL_SCANCODE_RIGHT] ? 0x8000 : 0;
+	case DVL_VK_DOWN:
+		return state[SDL_SCANCODE_DOWN] ? 0x8000 : 0;
+	default:
+		return 0;
 	}
-	if (vKey == DVL_VK_MENU && state[SDL_SCANCODE_M]) {
-		return 0x8000;
+#else
+	const Uint8 *state = SDL_GetKeyState(nullptr);
+	switch (vKey) {
+	case DVL_VK_SHIFT:
+		return state[SDLK_LSHIFT] || state[SDLK_RSHIFT] ? 0x8000 : 0;
+	case DVL_VK_MENU:
+		return state[SDLK_MENU] ? 0x8000 : 0;
+	case DVL_VK_LEFT:
+		return state[SDLK_LEFT] ? 0x8000 : 0;
+	case DVL_VK_UP:
+		return state[SDLK_UP] ? 0x8000 : 0;
+	case DVL_VK_RIGHT:
+		return state[SDLK_RIGHT] ? 0x8000 : 0;
+	case DVL_VK_DOWN:
+		return state[SDLK_DOWN] ? 0x8000 : 0;
+	default:
+		return 0;
 	}
 #endif
-
-	return 0;
 }
 
 LRESULT DispatchMessageA(const MSG *lpMsg)