initial multi-group support, still some work to do (e.g. the skin change does not work)

src/audiomixerboard.cpp

@@ -60,6 +60,17 @@ CChannelFader::CChannelFader ( QWidget* pNW )
     QVBoxLayout* pPanGrid       = new QVBoxLayout ( );
     QHBoxLayout* pPanInfoGrid   = new QHBoxLayout ( );
 
+    // define the popup menu for the group checkbox
+    pGroupPopupMenu = new QMenu ( "", pcbGroup );
+    pGroupPopupMenu->addAction ( tr ( "No grouping" ), this, SLOT ( OnGroupMenuGrpNone() ) );
+    pGroupPopupMenu->addAction ( tr ( "Assign to group" ) + " 1", this, SLOT ( OnGroupMenuGrp1() ) );
+    pGroupPopupMenu->addAction ( tr ( "Assign to group" ) + " 2", this, SLOT ( OnGroupMenuGrp2() ) );
+    pGroupPopupMenu->addAction ( tr ( "Assign to group" ) + " 3", this, SLOT ( OnGroupMenuGrp3() ) );
+    pGroupPopupMenu->addAction ( tr ( "Assign to group" ) + " 4", this, SLOT ( OnGroupMenuGrp4() ) );
+#if ( MAX_NUM_FADER_GROUPS != 4 )
+# error "MAX_NUM_FADER_GROUPS must be set to 4, see implementation in CChannelFader()"
+#endif
+
     // setup channel level
     plbrChannelLevel->setContentsMargins ( 0, 3, 2, 3 );
 
@@ -183,6 +194,9 @@ CChannelFader::CChannelFader ( QWidget* pNW )
 
     QObject::connect ( pcbSolo, &QCheckBox::stateChanged,
         this, &CChannelFader::soloStateChanged );
+
+    QObject::connect ( pcbGroup, &QCheckBox::stateChanged,
+        this, &CChannelFader::OnGroupStateChanged );
 }
 
 void CChannelFader::SetGUIDesign ( const EGUIDesign eNewDesign )
@@ -319,7 +333,6 @@ void CChannelFader::Reset()
     // reset mute/solo/group check boxes and level meter
     pcbMute->setChecked ( false );
     pcbSolo->setChecked ( false );
-    pcbGroup->setChecked ( false );
     plbrChannelLevel->SetValue ( 0 );
     plbrChannelLevel->ClipReset();
 
@@ -341,6 +354,9 @@ void CChannelFader::Reset()
 
     bOtherChannelIsSolo = false;
     bIsMyOwnFader       = false;
+
+    iGroupID = INVALID_INDEX;
+    UpdateGroupCheckState();
 }
 
 void CChannelFader::SetFaderLevel ( const double dLevel,
@@ -441,6 +457,49 @@ void CChannelFader::OnMuteStateChanged ( int value )
     SetMute ( static_cast<Qt::CheckState> ( value ) == Qt::Checked );
 }
 
+void CChannelFader::SetGroupID ( const int iNGroupID )
+{
+    iGroupID = iNGroupID;
+
+// TODO different skins, different text; also prolem with skin update
+    if ( iNGroupID != INVALID_INDEX )
+    {
+        pcbGroup->setText ( tr ( "Grp" ) + QString::number ( iNGroupID + 1  ) );
+    }
+    else
+    {
+        pcbGroup->setText ( tr ( "Grp" ) );
+    }
+
+    UpdateGroupCheckState();
+}
+
+void CChannelFader::UpdateGroupCheckState()
+{
+    // update the group checkbox according the current group ID setting
+    pcbGroup->blockSignals ( true ); // make sure no signals as fired
+    if ( iGroupID == INVALID_INDEX )
+    {
+        pcbGroup->setCheckState ( Qt::Unchecked );
+    }
+    else
+    {
+        pcbGroup->setCheckState ( Qt::Checked );
+    }
+    pcbGroup->blockSignals ( false );
+}
+
+void CChannelFader::OnGroupStateChanged ( int )
+{
+    // we want a popup menu shown if the user presses the group checkbox but
+    // we want to make sure that the checkbox state represents the current group
+    // setting and not the current click state since the user might not click
+    // on the menu but at one other place and then the popup menu disappears but
+    // the checkobx state would be on an invalid state
+    UpdateGroupCheckState();
+    pGroupPopupMenu->popup ( QCursor::pos() );
+}
+
 void CChannelFader::SetMute ( const bool bState )
 {
     if ( bState )

src/audiomixerboard.h

@@ -36,6 +36,7 @@
 #include <QSizePolicy>
 #include <QHostAddress>
 #include <QListWidget>
+#include <QMenu>
 #include "global.h"
 #include "util.h"
 #include "levelmeter.h"
@@ -57,7 +58,7 @@ public:
     bool    IsVisible() { return !pFrame->isHidden(); }
     bool    IsSolo() { return pcbSolo->isChecked(); }
     bool    IsMute() { return pcbMute->isChecked(); }
-    int     GetGroupID() { return pcbGroup->isChecked() ? 0 : INVALID_INDEX; }
+    int     GetGroupID() { return iGroupID; }
     void    SetGUIDesign ( const EGUIDesign eNewDesign );
     void    SetDisplayChannelLevel ( const bool eNDCL );
     bool    GetDisplayChannelLevel();
@@ -67,7 +68,7 @@ public:
     void SetPanValue ( const int iPan );
     void SetFaderIsSolo ( const bool bIsSolo );
     void SetFaderIsMute ( const bool bIsMute );
-    void SetGroupID ( const int iGroupID ) { pcbGroup->setChecked ( iGroupID != INVALID_INDEX ); }
+    void SetGroupID ( const int iNGroupID );
     void SetRemoteFaderIsMute ( const bool bIsMute );
     void SetFaderLevel ( const double dLevel,
                          const bool   bIsGroupUpdate = false );
@@ -81,6 +82,7 @@ public:
     void   UpdateSoloState ( const bool bNewOtherSoloState );
 
 protected:
+    void   UpdateGroupCheckState();
     double CalcFaderGain ( const double dValue );
     void   SetMute ( const bool bState );
     void   SetupFaderTag ( const ESkillLevel eSkillLevel );
@@ -103,6 +105,7 @@ protected:
     QCheckBox*   pcbMute;
     QCheckBox*   pcbSolo;
     QCheckBox*   pcbGroup;
+    QMenu*       pGroupPopupMenu;
 
     QGroupBox*   pLabelInstBox;
     QLabel*      plblLabel;
@@ -114,11 +117,19 @@ protected:
     bool         bOtherChannelIsSolo;
     bool         bIsMyOwnFader;
     double       dPreviousFaderLevel;
+    int          iGroupID;
 
 public slots:
     void OnLevelValueChanged ( int value ) { SendFaderLevelToServer ( value, false ); }
     void OnPanValueChanged ( int value ) { SendPanValueToServer ( value ); }
     void OnMuteStateChanged ( int value );
+    void OnGroupStateChanged ( int );
+
+    void OnGroupMenuGrpNone() { SetGroupID ( INVALID_INDEX ); }
+    void OnGroupMenuGrp1()    { SetGroupID ( 0 ); }
+    void OnGroupMenuGrp2()    { SetGroupID ( 1 ); }
+    void OnGroupMenuGrp3()    { SetGroupID ( 2 ); }
+    void OnGroupMenuGrp4()    { SetGroupID ( 3 ); }
 
 signals:
     void gainValueChanged ( double value,

src/global.h

@@ -152,8 +152,8 @@ LED bar:      lbr
 #define AUD_MIX_FADER_MAX                100
 #define AUD_MIX_PAN_MAX                  100
 
-// maximum number of fader groups
+// maximum number of fader groups (must be consistent to audiomixerboard implementation)
-#define MAX_NUM_FADER_GROUPS             10
+#define MAX_NUM_FADER_GROUPS             4
 
 // maximum number of recognized sound cards installed in the system
 #define MAX_NUMBER_SOUND_CARDS           129 // e.g. 16 inputs, 8 outputs + default entry (MacOS)