refs #335, made transponder code a own spinbox class for better formatting

src/blackgui/transpondercodespinbox.cpp

@@ -0,0 +1,24 @@
+/* Copyright (C) 2013
+ * 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.
+ */
+
+#include "transpondercodespinbox.h"
+
+namespace BlackGui
+{
+    CTransponderCodeSpinBox::CTransponderCodeSpinBox(QWidget *parent) :
+        QSpinBox(parent)
+    { }
+
+    QString CTransponderCodeSpinBox::textFromValue(int value) const
+    {
+        /* 4 - number of digits, 10 - base of number, '0' - pad character*/
+        return QString("%1").arg(value, 4 , 10, QChar('0'));
+    }
+
+} // namespace

src/blackgui/transpondercodespinbox.h

@@ -0,0 +1,32 @@
+/* Copyright (C) 2013
+ * 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_TRANSPONDERCODESPINBOX_H
+#define BLACKGUI_TRANSPONDERCODESPINBOX_H
+
+#include <QSpinBox>
+
+namespace BlackGui
+{
+
+    //! Specialized spin box for Transponder codes
+    class CTransponderCodeSpinBox : public QSpinBox
+    {
+        Q_OBJECT
+    public:
+        explicit CTransponderCodeSpinBox(QWidget *parent = nullptr);
+
+        //! \copydoc QDoubleSpinBox::textFromValue
+        virtual QString textFromValue(int value) const override;
+    };
+} // namespace
+
+#endif // guard