Ref T171, callsign completer class

* completer used in 3 places, makes sense to encapsulate as class
* automatically updating from network context

src/blackgui/components/callsigncompleter.h

@@ -0,0 +1,73 @@
+/* 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_COMPONENTS_CALLSIGNCOMPLETER_H
+#define BLACKGUI_COMPONENTS_CALLSIGNCOMPLETER_H
+
+#include "blackgui/blackguiexport.h"
+#include "blackmisc/digestsignal.h"
+#include "blackmisc/aviation/callsignset.h"
+#include "blackcore/network.h"
+#include <QFrame>
+#include <QScopedPointer>
+#include <QTimer>
+#include <QCompleter>
+
+namespace Ui { class CCallsignCompleter; }
+namespace BlackGui
+{
+    namespace Components
+    {
+        /**
+         * Completer for aircraft callsigns
+         */
+        class BLACKGUI_EXPORT CCallsignCompleter : public QFrame
+        {
+            Q_OBJECT
+
+        public:
+            //! Ctor
+            explicit CCallsignCompleter(QWidget *parent = nullptr);
+
+            //! Dtor
+            virtual ~CCallsignCompleter();
+
+            //! Get the entered callsign
+            BlackMisc::Aviation::CCallsign getCallsign() const;
+
+            //! String as entered
+            QString getRawCallsignString() const;
+
+            //! Is valid callsign?
+            bool hasValidCallsign() const;
+
+        signals:
+            //! Callsign entered
+            void validCallsignEntered();
+
+            //! Editing finished
+            void editingFinished();
+
+        private:
+            void updateCallsignsFromContext();
+            void onEditingFinished();
+            void onChangedAircraftInRange();
+            void onChangedConnectionStatus(BlackCore::INetwork::ConnectionStatus from, BlackCore::INetwork::ConnectionStatus to);
+            bool isValidKnownCallsign(const QString &callsignString) const;
+
+            QScopedPointer <Ui::CCallsignCompleter> ui;
+            QCompleter *m_currentCompleter = nullptr;
+            BlackMisc::Aviation::CCallsignSet m_validCallsigns;
+            BlackMisc::CDigestSignal m_dsAircraftsInRangeChanged { this, &CCallsignCompleter::onChangedAircraftInRange, 5000, 5 };
+        };
+    } // ns
+} // ns
+#endif // guard