Add initial work on Qt frontend

src/duckstation-qt/mainwindow.h

@@ -0,0 +1,57 @@
+#pragma once
+#include <QtCore/QThread>
+#include <QtWidgets/QLabel>
+#include <QtWidgets/QMainWindow>
+#include <memory>
+
+#include "settingsdialog.h"
+#include "ui_mainwindow.h"
+
+class GameList;
+class GameListWidget;
+class QtHostInterface;
+
+class MainWindow : public QMainWindow
+{
+  Q_OBJECT
+
+public:
+  explicit MainWindow(QtHostInterface* host_interface);
+  ~MainWindow();
+
+public Q_SLOTS:
+  void onEmulationStarting();
+  void onEmulationStarted();
+  void onEmulationStopped();
+  void onEmulationPaused(bool paused);
+
+  void onStartDiscActionTriggered();
+  void onChangeDiscActionTriggered();
+  void onStartBiosActionTriggered();
+  void onOpenDirectoryActionTriggered();
+  void onExitActionTriggered();
+  void onFullscreenActionToggled(bool fullscreen);
+  void onGitHubRepositoryActionTriggered();
+  void onIssueTrackerActionTriggered();
+  void onAboutActionTriggered();
+
+private:
+  void createGameList();
+  void setupAdditionalUi();
+  void connectSignals();
+  void updateEmulationActions(bool starting, bool running);
+  void switchToGameListView();
+  void switchToEmulationView();
+  void doSettings(SettingsDialog::Category category = SettingsDialog::Category::Count);
+
+  Ui::MainWindow m_ui;
+
+  QtHostInterface* m_host_interface = nullptr;
+
+  std::unique_ptr<GameList> m_game_list;
+  GameListWidget* m_game_list_widget = nullptr;
+
+  SettingsDialog* m_settings_dialog = nullptr;
+
+  bool m_emulation_running = false;
+};