Merge pull request #7206 from delroth/qt-boottime

dqt2: lazy-initialize GraphicsWindow

Source/Core/DolphinQt2/Config/Graphics/GraphicsWindow.cpp

@@ -27,6 +27,17 @@
 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;
+
   g_Config.Refresh();
   g_video_backend->InitBackendInfo();
 

Source/Core/DolphinQt2/Config/Graphics/GraphicsWindow.h

@@ -29,6 +29,8 @@ 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:
@@ -39,6 +41,8 @@ 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/DolphinQt2/MainWindow.cpp

@@ -935,6 +935,7 @@ void MainWindow::ShowHotkeyDialog()
 
 void MainWindow::ShowGraphicsWindow()
 {
+  m_graphics_window->Initialize();
   m_graphics_window->show();
   m_graphics_window->raise();
   m_graphics_window->activateWindow();