Move screen stuff into screen.cpp.

source/screen.cpp

@@ -0,0 +1,46 @@
+/*
+ *   This file is part of Universal-Core
+ *   Copyright (C) 2021 Universal-Team
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
+ *       * Requiring preservation of specified reasonable legal notices or
+ *         author attributions in that material or in the Appropriate Legal
+ *         Notices displayed by works containing it.
+ *       * Prohibiting misrepresentation of the origin of that material,
+ *         or requiring that modified versions of such material be marked in
+ *         reasonable ways as different from the original version.
+ */
+
+#include "screen.hpp"
+
+std::stack<std::unique_ptr<Screen>> Screen::screens;
+
+void Screen::doDraw() {
+	if(!Screen::screens.empty())
+		Screen::screens.top()->Draw();
+}
+
+void Screen::doLogic(u32 hDown, u32 hHeld, touchPosition touch) {
+	if(!Screen::screens.empty())
+		Screen::screens.top()->Logic(hDown, hHeld, touch);
+}
+
+void Screen::set(std::unique_ptr<Screen> screen) { Screen::screens.push(std::move(screen)); }
+
+void Screen::back() {
+	if(Screen::screens.size() > 0)
+		Screen::screens.pop();
+}