Saving history of line edit for command line ("dot commands")

src/blackgui/lineedithistory.h

@@ -0,0 +1,44 @@
+/* Copyright (C) 2017
+ * 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_LINEEDITHISTORY_H
+#define BLACKGUI_LINEEDITHISTORY_H
+
+#include <QLineEdit>
+#include <QStringList>
+
+namespace BlackGui
+{
+    /*!
+     * Line edit with history
+     */
+    class CLineEditHistory : public QLineEdit
+    {
+    public:
+        //! Constructors
+        using QLineEdit::QLineEdit;
+
+        //! Get the last entered line
+        QString getLastEnteredLine() const;
+
+        //! Get the last entered line but simplified and trimmed
+        QString getLastEnteredLineFormatted() const;
+
+    protected:
+        //! \copydoc QLineEdit::keyPressEvent
+        virtual void keyPressEvent(QKeyEvent *event) override;
+
+    private:
+        QStringList m_history;
+        int m_position = 0;
+    };
+} // ns
+#endif // guard