Add Alt+O hotkey to change the operator quickly without going to the Settings dialog

Thanks to Jim, W2JC, for suggesting this enhancement.

Configuration.cpp

@@ -718,6 +718,7 @@ bool Configuration::x2ToneSpacing() const {return m_->x2ToneSpacing_;}
 bool Configuration::x4ToneSpacing() const {return m_->x4ToneSpacing_;}
 bool Configuration::split_mode () const {return m_->split_mode ();}
 QString Configuration::opCall() const {return m_->opCall_;}
+void Configuration::opCall (QString const& call) {m_->opCall_ = call;}
 QString Configuration::udp_server_name () const {return m_->udp_server_name_;}
 auto Configuration::udp_server_port () const -> port_type {return m_->udp_server_port_;}
 bool Configuration::accept_udp_requests () const {return m_->accept_udp_requests_;}

Configuration.hpp

@@ -148,6 +148,7 @@ public:
   bool EMEonly() const;
   bool post_decodes () const;
   QString opCall() const;
+  void opCall (QString const&);
   QString udp_server_name () const;
   port_type udp_server_port () const;
   QString n1mm_server_name () const;

shortcuts.txt

@@ -35,6 +35,7 @@
   <tr><td><b>Alt+M    </b></td><td>Monitor</td></tr>
   <tr><td><b>Alt+N    </b></td><td>Enable Tx</td></tr>
   <tr><td><b>Ctrl+O   </b></td><td>Open a .wav file</td></tr>
+  <tr><td><b>Alt+O    </b></td><td>Change operator</td></tr>
   <tr><td><b>Alt+Q    </b></td><td>Log QSO</td></tr>
   <tr><td><b>Alt+S    </b></td><td>Stop monitoring</td></tr>
   <tr><td><b>Alt+T    </b></td><td>Tune</td></tr>

widgets/mainwindow.cpp

@@ -37,6 +37,7 @@
 #include <QSplashScreen>
 #include <QUdpSocket>
 #include <QAbstractItemView>
+#include <QInputDialog>
 
 #include "revision_utils.hpp"
 #include "qt_helpers.hpp"
@@ -2062,6 +2063,15 @@ void MainWindow::keyPressEvent (QKeyEvent * e)
           on_actionOpen_triggered();
           return;
       }
+      else if(e->modifiers() & Qt::AltModifier) {
+        bool ok;
+        auto call = QInputDialog::getText (this, tr ("Change Operator"), tr ("New operator:"),
+                                           QLineEdit::Normal, m_config.opCall (), &ok);
+        if (ok) {
+          m_config.opCall (call);
+        }
+        return;
+      }
       break;
     case Qt::Key_V:
       if(e->modifiers() & Qt::AltModifier) {