MainWindow: Hide the main menu unless Altt is pressed

[pulseview.git] / pv / widgets / hidingmenubar.hpp

diff --git a/pv/widgets/hidingmenubar.hpp b/pv/widgets/hidingmenubar.hpp
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+++ b/pv/widgets/hidingmenubar.hpp
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+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2015 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef PULSEVIEW_PV_WIDGETS_HIDINGMENUBAR_H
+#define PULSEVIEW_PV_WIDGETS_HIDINGMENUBAR_H
+
+#include <QMenuBar>
+
+namespace pv {
+namespace widgets {
+
+/**
+ * A menu bar widget that only remains visible while it retains focus.
+ */
+class HidingMenuBar : public QMenuBar
+{
+       Q_OBJECT
+
+public:
+       /**
+        * Constructor
+        * @param parent The parent widget.
+        */
+       HidingMenuBar(QWidget *parent = nullptr);
+
+private:
+       /**
+        * Handles the event that the widget loses keyboard focus.
+        * @param e the representation of the event details.
+        */
+       void focusOutEvent(QFocusEvent *e);
+
+       /**
+        * Handles the event that a key is depressed.
+        * @param e the representation of the event details.
+        */
+       void keyPressEvent(QKeyEvent *e);
+
+private Q_SLOTS:
+       /**
+        * Handles a menu items being triggered.
+        */
+       void item_triggered();
+};
+
+} // widgets
+} // pv
+
+#endif // PULSEVIEW_PV_WIDGETS_HIDINGMENUBAR_H