Fixed a bug in restore functionality that caused application crash, added initial support for perspectives

demo/MainWindow.h

@@ -0,0 +1,63 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
+//============================================================================
+/// \file   MainWindow.h
+/// \author Uwe Kindler
+/// \date   13.02.2018
+/// \brief  Declaration of CMainWindow class
+//============================================================================
+
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include <QMainWindow>
+
+
+
+struct MainWindowPrivate;
+
+
+/**
+ * Simple main window for demo
+ */
+class CMainWindow : public QMainWindow
+{
+	Q_OBJECT
+private:
+	MainWindowPrivate* d;///< private data - pimpl
+	friend class MainWindowPrivate;
+
+protected:
+	virtual void closeEvent(QCloseEvent* event) override;
+
+public:
+	explicit CMainWindow(QWidget *parent = 0);
+	virtual ~CMainWindow();
+
+private slots:
+	void on_actionSaveState_triggered(bool);
+	void on_actionRestoreState_triggered(bool);
+	void savePerspective();
+};
+
+#endif // MAINWINDOW_H