initialization and cleanup

rktwebview_qt/rktwebview.cpp

@@ -24,11 +24,55 @@ uint64_t current_ms() {
 
 Rktwebview_qt *handler = nullptr;
 
+void rkt_webview_cleanup()
+{
+    if (handler != nullptr) {
+
+        rkt_webview_process_events(100);
+
+        //QTimer app_quit;
+        //QObject::connect(&app_quit, &QTimer::timeout, handler->app(), &QApplication::quit, Qt::ConnectionType::QueuedConnection);
+
+        //app_quit.setSingleShot(true);
+        //app_quit.start(250);
+
+        //handler->app()->exec();
+
+        //fprintf(stderr, "cleanup: handler = %p\n", handler);
+
+        // TODO
+        // Do not delete the QApplication, although it will result in QThreadStorage warnings.
+        // If the app is deleted, QtWebEngineProfileBuilder->createProfile will memory corrupt.
+        //handler->deleteApp();
+
+        //delete handler;
+        //handler = nullptr;
+
+        //fprintf(stderr, "cleanup: handler = %p\n", handler);
+    }
+}
+
 void rkt_webview_init()
 {
     if (handler == nullptr) {
-        handler = new Rktwebview_qt(&handler);
-        handler->doEvents();
+        //fprintf(stderr, "init: handler = %p\n", handler);
+        handler = new Rktwebview_qt();
+        //fprintf(stderr, "init: handler = %p\n", handler);
+    }
+
+    if (handler->app() == nullptr) {
+        handler->initApp();
+
+        //QTimer app_exit;
+        //QObject::connect(&app_exit, &QTimer::timeout, handler->app(), []() {
+        //    handler->app()->exit(0);
+        //}, Qt::ConnectionType::QueuedConnection);
+
+        //app_exit.setSingleShot(true);
+        //app_exit.start(250);
+
+        //QApplication *a = handler->app();
+        //a->exec();
     }
 }