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diff --git a/qtmips_gui/hexlineedit.h b/qtmips_gui/hexlineedit.h
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+++ b/qtmips_gui/hexlineedit.h
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+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#ifndef HEXLINEEDIT_H
+#define HEXLINEEDIT_H
+
+#include <QLineEdit>
+#include <QObject>
+
+class HexLineEdit : public QLineEdit
+{
+    Q_OBJECT
+
+    using Super = QLineEdit;
+
+public:
+    HexLineEdit(QWidget *parent = nullptr, int digits = 8, int base = 0,
+                QString prefix = "0x");
+
+public slots:
+    void set_value(std::int32_t value);
+
+signals:
+    void value_edit_finished(std::int32_t value);
+
+private slots:
+    void on_edit_finished();
+
+private:
+    int base;
+    int digits;
+    QString prefix;
+    std::uint32_t last_set;
+};
+
+#endif // HEXLINEEDIT_H