diff --git a/qad/widgets/session_manager.cpp b/qad/widgets/session_manager.cpp
index 56a761b..ebc99d3 100644
--- a/qad/widgets/session_manager.cpp
+++ b/qad/widgets/session_manager.cpp
@@ -13,6 +13,16 @@ void SessionManager::setFile(const QString & file) {
 }
 
 
+void SessionManager::removeMainWidget(QWidget * e) {
+	for (int i = 0; i < widgets.size(); ++i) {
+		if (widgets[i].first == e->objectName()) {
+			widgets.remove(i);
+			--i;
+		}
+	}
+}
+
+
 void SessionManager::save() {
 	if (file_.isEmpty()) return;
 	QPIConfig sr(file_);
diff --git a/qad/widgets/session_manager.h b/qad/widgets/session_manager.h
index f851dfa..0b702ee 100644
--- a/qad/widgets/session_manager.h
+++ b/qad/widgets/session_manager.h
@@ -36,6 +36,7 @@ public:
 	void addEntry(QAbstractButton * e) {buttons.push_back(QPair<QString, QAbstractButton * >(e->objectName(), e));}
 	void addEntry(QStackedWidget * e) {stacks.push_back(QPair<QString, QStackedWidget * >(e->objectName(), e));}
 	void addMainWidget(QWidget * e) {widgets.push_back(QPair<QString, QWidget * >(e->objectName(), e));}
+	void removeMainWidget(QWidget * e);
 
 	void addEntry(const QString & name, QMainWindow * e) {mwindows.push_back(QPair<QString, QMainWindow * >(name, e));}
 	void addEntry(const QString & name, QCheckBox * e) {checks.push_back(QPair<QString, QCheckBox * >(name, e));}
diff --git a/qglview/qglview.cpp b/qglview/qglview.cpp
index 8e48aa4..543fac5 100644
--- a/qglview/qglview.cpp
+++ b/qglview/qglview.cpp
@@ -171,6 +171,7 @@ void QGLView::drawBackground(QPainter * painter, const QRectF & rect) {
 	painter_ = painter;
 	painter_->beginNativePainting();
 	if (is_first_draw) {
+		//connect(context(), SIGNAL(aboutToBeDestroyed()), this, SLOT(glCleanup()));
 		resizeGL(viewport()->width(), viewport()->height());
 		initializeGL();
 	}
@@ -731,3 +732,13 @@ bool QGLView::setupViewport() {
 	setViewport(_w);
 	return true;
 }
+
+
+void QGLView::glCleanup() {
+	//qDebug() << "cleanup";
+	/*disconnect(context(), SIGNAL(aboutToBeDestroyed()), this, SLOT(glCleanup()));
+	is_first_draw = true;
+	textures_manager = GLTextureManager();
+	currentQGLView = 0;
+	currentGLTextureManager = 0;*/
+}
diff --git a/qglview/qglview.h b/qglview/qglview.h
index 1c2f388..f29f9d9 100644
--- a/qglview/qglview.h
+++ b/qglview/qglview.h
@@ -307,6 +307,7 @@ public slots:
 
 	void reloadShaders() {if (renderer_ != 0) renderer_->reloadShaders(); reloadThisShaders();}
 	void deselect() {sel_obj = 0;}
+	void glCleanup();
 
 signals:
 	void glBeforePaint();