Qt: Update icons on dark/light mode switch

pcsx2-qt/MainWindow.cpp

@@ -1504,6 +1504,11 @@ void MainWindow::onToolsEditCheatsPatchesTriggered(bool cheats)
 void MainWindow::updateTheme()
 {
 	QtHost::UpdateApplicationTheme();
+	reloadThemeSpecificImages();
+}
+
+void MainWindow::reloadThemeSpecificImages()
+{
 	m_game_list_widget->reloadThemeSpecificImages();
 }
 
@@ -1789,6 +1794,17 @@ void MainWindow::closeEvent(QCloseEvent* event)
 	m_is_closing = true;
 }
 
+void MainWindow::changeEvent(QEvent* event)
+{
+	QMainWindow::changeEvent(event);
+
+	if (event->type() == QEvent::StyleChange)
+	{
+		QtHost::SetIconThemeFromStyle();
+		reloadThemeSpecificImages();
+	}
+}
+
 static QString getFilenameFromMimeData(const QMimeData* md)
 {
 	QString filename;

pcsx2-qt/MainWindow.h

@@ -167,6 +167,7 @@ private Q_SLOTS:
 	void onToolsCoverDownloaderTriggered();
 	void onToolsEditCheatsPatchesTriggered(bool cheats);
 	void updateTheme();
+	void reloadThemeSpecificImages();
 	void updateLanguage();
 	void onScreenshotActionTriggered();
 	void onSaveGSDumpActionTriggered();
@@ -199,6 +200,7 @@ private Q_SLOTS:
 protected:
 	void showEvent(QShowEvent* event) override;
 	void closeEvent(QCloseEvent* event) override;
+	void changeEvent(QEvent* event) override;
 	void dragEnterEvent(QDragEnterEvent* event) override;
 	void dropEvent(QDropEvent* event) override;
 

pcsx2-qt/QtHost.h

@@ -238,6 +238,9 @@ namespace QtHost
 	/// Sets application theme according to settings.
 	void UpdateApplicationTheme();
 
+	/// Sets the icon theme, based on the current style (light/dark).
+	void SetIconThemeFromStyle();
+
 	/// Sets batch mode (exit after game shutdown).
 	bool InBatchMode();
 

pcsx2-qt/Themes.cpp

@@ -29,7 +29,6 @@
 namespace QtHost
 {
 	static void SetStyleFromSettings();
-	static void SetIconThemeFromStyle();
 } // namespace QtHost
 
 static QString s_unthemed_style_name;