Qt: Support changing theme without reopening window

src/duckstation-qt/gamelistmodel.cpp

@@ -146,6 +146,12 @@ void GameListModel::updateCacheSize(int width, int height)
   m_cover_pixmap_cache.SetMaxCapacity(static_cast<int>(std::max(num_columns * num_rows, MIN_COVER_CACHE_SIZE)));
 }
 
+void GameListModel::reloadCommonImages()
+{
+  loadCommonImages();
+  refresh();
+}
+
 void GameListModel::loadOrGenerateCover(const GameList::Entry* ge)
 {
   QFuture<QPixmap> future =

src/duckstation-qt/gamelistmodel.h

@@ -63,6 +63,7 @@ public:
   int getCoverArtSpacing() const;
   void refreshCovers();
   void updateCacheSize(int width, int height);
+  void reloadCommonImages();
 
 private:
   void loadCommonImages();

src/duckstation-qt/gamelistwidget.cpp

@@ -455,6 +455,11 @@ void GameListWidget::resizeTableViewColumnsToFit()
                                                    });
 }
 
+void GameListWidget::reloadCommonImages()
+{
+  m_model->reloadCommonImages();
+}
+
 static TinyString getColumnVisibilitySettingsKeyName(int column)
 {
   return TinyString::FromFormat("Show%s", GameListModel::getColumnName(static_cast<GameListModel::Column>(column)));

src/duckstation-qt/gamelistwidget.h

@@ -38,6 +38,7 @@ public:
 
   void initialize();
   void resizeTableViewColumnsToFit();
+  void reloadCommonImages();
 
   void refresh(bool invalidate_cache);
   void cancelRefresh();

src/duckstation-qt/mainwindow.cpp

@@ -1957,9 +1957,8 @@ void MainWindow::setTheme(const QString& theme)
 {
   Host::SetBaseStringSettingValue("UI", "Theme", theme.toUtf8().constData());
   updateApplicationTheme();
-
-  // Sadly we need to recreate here, because otherwise the icon theme doesn't update.
-  recreate();
+  updateMenuSelectedTheme();
+  m_game_list_widget->reloadCommonImages();
 }
 
 void MainWindow::setStyleFromSettings()