further preparation for #356

src/audiomixerboard.cpp

@@ -768,20 +768,31 @@ void CAudioMixerBoard::HideAll()
     iMyChannelID    = INVALID_INDEX;
 
     // use original order of channel (by server ID)
-    ChangeFaderOrder ( false );
+    ChangeFaderOrder ( false, ST_BY_NAME );
 
     // emit status of connected clients
     emit NumClientsChanged ( 0 ); // -> no clients connected
 }
 
-void CAudioMixerBoard::ChangeFaderOrder ( const bool bDoSort )
+void CAudioMixerBoard::ChangeFaderOrder ( const bool        bDoSort,
+                                          const EChSortType eChSortType )
 {
     // create a pair list of lower strings and fader ID for each channel
     QList<QPair<QString, int> > PairList;
 
     for ( int i = 0; i < MAX_NUM_CHANNELS; i++ )
     {
-        PairList << QPair<QString, int> ( vecpChanFader[i]->GetReceivedName().toLower(), i );
+        if ( eChSortType == ST_BY_NAME )
+        {
+            PairList << QPair<QString, int> ( vecpChanFader[i]->GetReceivedName().toLower(), i );
+        }
+        else // ST_BY_INSTRUMENT
+        {
+            // note that the sorting will not be the same as we would use QPair<int, int>
+            // but this is not a problem since the order of the instrument IDs are arbitrary
+            // anyway
+            PairList << QPair<QString, int> ( QString::number ( vecpChanFader[i]->GetReceivedInstrument() ), i );
+        }
     }
 
     // if requested, sort the channels

src/audiomixerboard.h

@@ -147,7 +147,6 @@ public:
     CAudioMixerBoard ( QWidget* parent = nullptr, Qt::WindowFlags f = nullptr );
 
     void HideAll();
-    void ChangeFaderOrder ( const bool bDoSort );
     void ApplyNewConClientList ( CVector<CChannelInfo>& vecChanInfo );
     void SetServerName ( const QString& strNewServerName );
     void SetGUIDesign ( const EGUIDesign eNewDesign );
@@ -160,6 +159,9 @@ public:
     void SetFaderLevel ( const int iChannelIdx,
                          const int iValue );
 
+    void ChangeFaderOrder ( const bool        bDoSort,
+                            const EChSortType eChSortType );
+
     void SetChannelLevels ( const CVector<uint16_t>& vecChannelLevel );
 
     // settings

src/clientdlg.h

@@ -152,7 +152,7 @@ public slots:
     void OnOpenGeneralSettings() { ShowGeneralSettings(); }
     void OnOpenChatDialog() { ShowChatWindow(); }
     void OnOpenAnalyzerConsole() { ShowAnalyzerConsole(); }
-    void OnSortChannelsByName() { MainMixerBoard->ChangeFaderOrder ( true ); }
+    void OnSortChannelsByName() { MainMixerBoard->ChangeFaderOrder ( true, ST_BY_NAME ); }
 
     void OnSettingsStateChanged ( int value );
     void OnChatStateChanged ( int value );

src/util.h

@@ -563,6 +563,14 @@ enum ELicenceType
 };
 
 
+// Channel sort type -----------------------------------------------------------
+enum EChSortType
+{
+    ST_BY_NAME = 0,
+    ST_BY_INSTRUMENT = 1
+};
+
+
 // Central server address type -------------------------------------------------
 enum ECSAddType
 {