Qt: Set game icon as window icon in Game Properties

src/duckstation-qt/mainwindow.cpp

@@ -671,7 +671,7 @@ void MainWindow::onSystemGameChanged(const QString& path, const QString& game_se
   s_current_game_path = path;
   s_current_game_title = game_title;
   s_current_game_serial = game_serial;
-  s_current_game_icon = m_game_list_widget->getModel()->getIconForGame(path);
+  s_current_game_icon = getIconForGame(path);
 
   updateWindowTitle();
 }
@@ -3027,6 +3027,11 @@ void MainWindow::cancelGameListRefresh()
   m_game_list_widget->cancelRefresh();
 }
 
+QIcon MainWindow::getIconForGame(const QString& path)
+{
+  return m_game_list_widget->getModel()->getIconForGame(path);
+}
+
 void MainWindow::runOnUIThread(const std::function<void()>& func)
 {
   func();

src/duckstation-qt/mainwindow.h

@@ -123,6 +123,7 @@ public:
   void refreshGameList(bool invalidate_cache);
   void refreshGameListModel();
   void cancelGameListRefresh();
+  QIcon getIconForGame(const QString& path);
 
   void runOnUIThread(const std::function<void()>& func);
   void requestShutdown(bool allow_confirm, bool allow_save_to_state, bool save_state, bool check_safety,

src/duckstation-qt/settingswindow.cpp

@@ -57,6 +57,10 @@ SettingsWindow::SettingsWindow(const GameList::Entry* entry, std::unique_ptr<INI
     m_hash(entry->hash)
 {
   m_ui.setupUi(this);
+
+  if (const QIcon icon = g_main_window->getIconForGame(QString::fromStdString(entry->path)); !icon.isNull())
+    setWindowIcon(icon);
+
   setGameTitle(entry->GetDisplayTitle(GameList::ShouldShowLocalizedTitles()));
   setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);