Qt/MainWindow: Lazy initialize child windows

Source/Core/DolphinQt/Config/Graphics/GraphicsWindow.cpp

@@ -27,17 +27,6 @@
 GraphicsWindow::GraphicsWindow(X11Utils::XRRConfiguration* xrr_config, MainWindow* parent)
     : QDialog(parent), m_xrr_config(xrr_config)
 {
-  // GraphicsWindow initialization is heavy due to dependencies on the graphics subsystem.
-  // To prevent blocking startup, we create the layout and children at first show time.
-}
-
-void GraphicsWindow::Initialize()
-{
-  if (m_lazy_initialized)
-    return;
-
-  m_lazy_initialized = true;
-
   CreateMainLayout();
 
   setWindowTitle(tr("Graphics"));

Source/Core/DolphinQt/Config/Graphics/GraphicsWindow.h

@@ -29,8 +29,6 @@ class GraphicsWindow final : public QDialog
 public:
   explicit GraphicsWindow(X11Utils::XRRConfiguration* xrr_config, MainWindow* parent);
 
-  void Initialize();
-
   void RegisterWidget(GraphicsWidget* widget);
   bool eventFilter(QObject* object, QEvent* event) override;
 signals:
@@ -41,8 +39,6 @@ private:
   void OnBackendChanged(const QString& backend);
   void OnDescriptionAdded(QWidget* widget, const char* description);
 
-  bool m_lazy_initialized = false;
-
   QTabWidget* m_tab_widget;
   QLabel* m_description;
   QDialogButtonBox* m_button_box;

Source/Core/DolphinQt/MainWindow.cpp

@@ -260,8 +260,6 @@ void MainWindow::CreateComponents()
   m_game_list = new GameList(this);
   m_render_widget = new RenderWidget;
   m_stack = new QStackedWidget(this);
-  m_controllers_window = new ControllersWindow(this);
-  m_settings_window = new SettingsWindow(this);
 
   for (int i = 0; i < 4; i++)
   {
@@ -281,11 +279,7 @@ void MainWindow::CreateComponents()
   m_jit_widget = new JITWidget(this);
   m_log_widget = new LogWidget(this);
   m_log_config_widget = new LogConfigWidget(this);
-  m_fifo_window = new FIFOPlayerWindow(this);
   m_memory_widget = new MemoryWidget(this);
-
-  connect(m_fifo_window, &FIFOPlayerWindow::LoadFIFORequested, this,
-          [this](const QString& path) { StartGame(path); });
   m_register_widget = new RegisterWidget(this);
   m_watch_widget = new WatchWidget(this);
   m_breakpoint_widget = new BreakpointWidget(this);
@@ -311,20 +305,6 @@ void MainWindow::CreateComponents()
     if (Core::GetState() == Core::State::Paused)
       m_code_widget->SetAddress(address, CodeViewWidget::SetAddressUpdate::WithUpdate);
   });
-
-#if defined(HAVE_XRANDR) && HAVE_XRANDR
-  m_xrr_config = std::make_unique<X11Utils::XRRConfiguration>(
-      static_cast<Display*>(QGuiApplication::platformNativeInterface()->nativeResourceForWindow(
-          "display", windowHandle())),
-      winId());
-  m_graphics_window = new GraphicsWindow(m_xrr_config.get(), this);
-#else
-  m_graphics_window = new GraphicsWindow(nullptr, this);
-#endif
-
-  InstallHotkeyFilter(m_controllers_window);
-  InstallHotkeyFilter(m_settings_window);
-  InstallHotkeyFilter(m_graphics_window);
 }
 
 void MainWindow::ConnectMenuBar()
@@ -913,6 +893,12 @@ void MainWindow::HideRenderWidget(bool reinit)
 
 void MainWindow::ShowControllersWindow()
 {
+  if (!m_controllers_window)
+  {
+    m_controllers_window = new ControllersWindow(this);
+    InstallHotkeyFilter(m_controllers_window);
+  }
+
   m_controllers_window->show();
   m_controllers_window->raise();
   m_controllers_window->activateWindow();
@@ -920,6 +906,12 @@ void MainWindow::ShowControllersWindow()
 
 void MainWindow::ShowSettingsWindow()
 {
+  if (!m_settings_window)
+  {
+    m_settings_window = new SettingsWindow(this);
+    InstallHotkeyFilter(m_settings_window);
+  }
+
   m_settings_window->show();
   m_settings_window->raise();
   m_settings_window->activateWindow();
@@ -927,14 +919,14 @@ void MainWindow::ShowSettingsWindow()
 
 void MainWindow::ShowAudioWindow()
 {
-  m_settings_window->SelectAudioPane();
   ShowSettingsWindow();
+  m_settings_window->SelectAudioPane();
 }
 
 void MainWindow::ShowGeneralWindow()
 {
-  m_settings_window->SelectGeneralPane();
   ShowSettingsWindow();
+  m_settings_window->SelectGeneralPane();
 }
 
 void MainWindow::ShowAboutDialog()
@@ -956,7 +948,19 @@ void MainWindow::ShowHotkeyDialog()
 
 void MainWindow::ShowGraphicsWindow()
 {
-  m_graphics_window->Initialize();
+  if (!m_graphics_window)
+  {
+#if defined(HAVE_XRANDR) && HAVE_XRANDR
+    m_xrr_config = std::make_unique<X11Utils::XRRConfiguration>(
+        static_cast<Display*>(QGuiApplication::platformNativeInterface()->nativeResourceForWindow(
+            "display", windowHandle())),
+        winId());
+    m_graphics_window = new GraphicsWindow(m_xrr_config.get(), this);
+#else
+    m_graphics_window = new GraphicsWindow(nullptr, this);
+#endif
+  }
+
   m_graphics_window->show();
   m_graphics_window->raise();
   m_graphics_window->activateWindow();
@@ -971,6 +975,13 @@ void MainWindow::ShowNetPlaySetupDialog()
 
 void MainWindow::ShowFIFOPlayer()
 {
+  if (!m_fifo_window)
+  {
+    m_fifo_window = new FIFOPlayerWindow(this);
+    connect(m_fifo_window, &FIFOPlayerWindow::LoadFIFORequested, this,
+            [this](const QString& path) { StartGame(path); });
+  }
+
   m_fifo_window->show();
   m_fifo_window->raise();
   m_fifo_window->activateWindow();

Source/Core/DolphinQt/MainWindow.h

@@ -180,13 +180,15 @@ private:
   int m_state_slot = 1;
   std::unique_ptr<BootParameters> m_pending_boot;
 
+  ControllersWindow* m_controllers_window = nullptr;
+  SettingsWindow* m_settings_window = nullptr;
+  GraphicsWindow* m_graphics_window = nullptr;
+  FIFOPlayerWindow* m_fifo_window = nullptr;
+
   HotkeyScheduler* m_hotkey_scheduler;
-  ControllersWindow* m_controllers_window;
-  SettingsWindow* m_settings_window;
   NetPlayDialog* m_netplay_dialog;
   DiscordHandler* m_netplay_discord;
   NetPlaySetupDialog* m_netplay_setup_dialog;
-  GraphicsWindow* m_graphics_window;
   static constexpr int num_gc_controllers = 4;
   std::array<GCTASInputWindow*, num_gc_controllers> m_gc_tas_input_windows{};
   static constexpr int num_wii_controllers = 4;
@@ -198,7 +200,6 @@ private:
   LogWidget* m_log_widget;
   LogConfigWidget* m_log_config_widget;
   MemoryWidget* m_memory_widget;
-  FIFOPlayerWindow* m_fifo_window;
   RegisterWidget* m_register_widget;
   WatchWidget* m_watch_widget;
   CheatsManager* m_cheats_manager;