CommonHostInterface: Add a method to get top-level window handle

src/duckstation-qt/main.cpp

@@ -32,6 +32,8 @@ int main(int argc, char* argv[])
   if (!host_interface->ParseCommandLineParameters(argc, argv, &boot_params))
     return EXIT_FAILURE;
 
+  std::unique_ptr<MainWindow> window = std::make_unique<MainWindow>(host_interface.get());
+
   if (!host_interface->Initialize())
   {
     host_interface->Shutdown();
@@ -40,8 +42,7 @@ int main(int argc, char* argv[])
     return EXIT_FAILURE;
   }
 
-  std::unique_ptr<MainWindow> window = std::make_unique<MainWindow>(host_interface.get());
-  window->show();
+  window->initializeAndShow();
 
   // if we're in batch mode, don't bother refreshing the game list as it won't be used
   if (!host_interface->inBatchMode())

src/duckstation-qt/mainwindow.cpp

@@ -47,6 +47,20 @@ MainWindow::MainWindow(QtHostInterface* host_interface)
 {
   m_host_interface->setMainWindow(this);
 
+  // force creation of native window
+  winId();
+}
+
+MainWindow::~MainWindow()
+{
+  Assert(!m_display_widget);
+  m_host_interface->setMainWindow(nullptr);
+
+  Assert(!m_debugger_window);
+}
+
+void MainWindow::initializeAndShow()
+{
   m_ui.setupUi(this);
   setupAdditionalUi();
   connectSignals();
@@ -56,14 +70,8 @@ MainWindow::MainWindow(QtHostInterface* host_interface)
 
   restoreStateFromConfig();
   switchToGameListView();
-}
 
-MainWindow::~MainWindow()
-{
-  Assert(!m_display_widget);
-  m_host_interface->setMainWindow(nullptr);
-
-  Assert(!m_debugger_window);
+  show();
 }
 
 void MainWindow::reportError(const QString& message)

src/duckstation-qt/mainwindow.h

@@ -31,6 +31,9 @@ public:
   explicit MainWindow(QtHostInterface* host_interface);
   ~MainWindow();
 
+  /// Initializes the window. Call once at startup.
+  void initializeAndShow();
+
   /// Performs update check if enabled in settings.
   void startupUpdateCheck();
 

src/duckstation-qt/qthostinterface.cpp

@@ -619,6 +619,11 @@ bool QtHostInterface::RequestRenderWindowSize(s32 new_window_width, s32 new_wind
   return true;
 }
 
+void* QtHostInterface::GetTopLevelWindowHandle() const
+{
+  return reinterpret_cast<void*>(m_main_window->winId());
+}
+
 void QtHostInterface::PollAndUpdate()
 {
   CommonHostInterface::PollAndUpdate();

src/duckstation-qt/qthostinterface.h

@@ -72,6 +72,7 @@ public:
   std::string TranslateStdString(const char* context, const char* str) const override;
 
   bool RequestRenderWindowSize(s32 new_window_width, s32 new_window_height) override;
+  void* GetTopLevelWindowHandle() const override;
 
   ALWAYS_INLINE const GameList* getGameList() const { return m_game_list.get(); }
   ALWAYS_INLINE GameList* getGameList() { return m_game_list.get(); }