refs #452 overlay messages (allows to display overlay messages in a widget)

* the overlay widget itself
* a QFrame derived class allowing to display such widgets as overlay

src/blackgui/overlaymessages.h

@@ -0,0 +1,84 @@
+/* Copyright (C) 2015
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_OVERLAYMESSAGES_H
+#define BLACKGUI_OVERLAYMESSAGES_H
+
+#include "blackmisc/statusmessagelist.h"
+#include <QFrame>
+#include <QScopedPointer>
+#include <QTimer>
+
+namespace Ui { class COverlayMessages; }
+
+namespace BlackGui
+{
+    /*!
+     * Display status messages (nested in another widget)
+     */
+    class COverlayMessages : public QFrame
+    {
+        Q_OBJECT
+
+    public:
+        //! Constructor
+        explicit COverlayMessages(int w, int h, QWidget *parent);
+
+        //! Constructor
+        explicit COverlayMessages(const QString &headerText, int w, int h, QWidget *parent);
+
+        //! Destructor
+        ~COverlayMessages();
+
+        //! Show multiple messages
+        void showMessages(const BlackMisc::CStatusMessageList &messages, int timeOutMs = -1);
+
+        //! Show single message
+        void showMessage(const BlackMisc::CStatusMessage &message, int timeOutMs = -1);
+
+        //! Messages mode
+        void setModeToMessages();
+
+        //! Single Message mode
+        void setModeToMessage();
+
+        //! Set header text
+        void setHeaderText(const QString &header);
+
+    public slots:
+        //! Close button clicked
+        void close();
+
+    protected:
+        //! Show message
+        void display(int timeOutMs = -1);
+
+        //! \copydoc QFrame::keyPressEvent
+        virtual void keyPressEvent(QKeyEvent *event) override;
+
+        //! \copydoc QFrame::paintEvent
+        virtual void paintEvent(QPaintEvent *event) override;
+
+    private:
+        QScopedPointer<Ui::COverlayMessages> ui;
+        QString m_header;
+        QTimer m_autoCloseTimer { this };
+
+        //! Init widget
+        void init(int w, int h);
+
+        //! Set header text
+        void setHeader(const QString &header);
+    };
+
+} // ns
+
+#endif // guard