Adds support for MIDI CC events inside LMMS (#5581)

include/AutomatableModelView.h

@@ -50,6 +50,7 @@ public:
 	}
 
 	void setModel( Model* model, bool isOldModelValid = true ) override;
+	void unsetModel() override;
 
 	template<typename T>
 	inline T value() const

include/InstrumentTrack.h

@@ -30,6 +30,8 @@
 #include "GroupBox.h"
 #include "InstrumentFunctions.h"
 #include "InstrumentSoundShaping.h"
+#include "Midi.h"
+#include "MidiCCRackView.h"
 #include "MidiEventProcessor.h"
 #include "MidiPort.h"
 #include "NotePlayHandle.h"
@@ -228,7 +230,6 @@ signals:
 	void newNote();
 	void endNote();
 
-
 protected:
 	QString nodeName() const override
 	{
@@ -247,6 +248,8 @@ protected slots:
 
 
 private:
+	void processCCEvent(int controller);
+
 	MidiPort m_midiPort;
 
 	NotePlayHandle* m_notes[NumKeys];
@@ -286,11 +289,14 @@ private:
 
 	Piano m_piano;
 
+	std::unique_ptr<BoolModel> m_midiCCEnable;
+	std::unique_ptr<FloatModel> m_midiCCModel[MidiControllerCount];
 
 	friend class InstrumentTrackView;
 	friend class InstrumentTrackWindow;
 	friend class NotePlayHandle;
 	friend class InstrumentMiscView;
+	friend class MidiCCRackView;
 
 } ;
 
@@ -334,6 +340,7 @@ protected:
 
 private slots:
 	void toggleInstrumentWindow( bool _on );
+	void toggleMidiCCRack();
 	void activityIndicatorPressed();
 	void activityIndicatorReleased();
 
@@ -361,6 +368,8 @@ private:
 	QAction * m_midiInputAction;
 	QAction * m_midiOutputAction;
 
+	std::unique_ptr<MidiCCRackView> m_midiCCRackView;
+
 	QPoint m_lastPos;
 
 	FadeButton * getActivityIndicator() override

include/MidiCCRackView.h

@@ -0,0 +1,40 @@
+#ifndef MIDI_CC_RACK_VIEW_H
+#define MIDI_CC_RACK_VIEW_H
+
+#include <QWidget>
+
+#include "GroupBox.h"
+#include "Knob.h"
+#include "Midi.h"
+#include "SerializingObject.h"
+
+class InstrumentTrack;
+
+class MidiCCRackView : public QWidget, public SerializingObject
+{
+	Q_OBJECT
+public:
+	MidiCCRackView(InstrumentTrack * track);
+	~MidiCCRackView() override;
+
+	void saveSettings(QDomDocument & doc, QDomElement & parent) override;
+	void loadSettings(const QDomElement &) override;
+
+	inline QString nodeName() const override
+	{
+		return "MidiCCRackView";
+	}
+
+private slots:
+	void renameWindow();
+
+private:
+	InstrumentTrack *m_track;
+
+	GroupBox *m_midiCCGroupBox; // MIDI CC GroupBox (used to enable disable MIDI CC)
+
+	Knob *m_controllerKnob[MidiControllerCount]; // Holds the knob widgets for each controller
+
+};
+
+#endif

include/MidiEvent.h

@@ -33,27 +33,30 @@
 class MidiEvent
 {
 public:
-	MidiEvent( MidiEventTypes type = MidiActiveSensing,
+	MidiEvent(MidiEventTypes type = MidiActiveSensing,
 				int8_t channel = 0,
 				int16_t param1 = 0,
 				int16_t param2 = 0,
-				const void* sourcePort = NULL ) :
+				const void* sourcePort = nullptr,
+				bool ignoreOnExport = true) :
 		m_type( type ),
 		m_metaEvent( MidiMetaInvalid ),
 		m_channel( channel ),
 		m_sysExData( NULL ),
-		m_sourcePort( sourcePort )
+		m_sourcePort(sourcePort),
+		m_ignoreOnExport(ignoreOnExport)
 	{
 		m_data.m_param[0] = param1;
 		m_data.m_param[1] = param2;
 	}
 
-	MidiEvent( MidiEventTypes type, const char* sysExData, int dataLen ) :
+	MidiEvent(MidiEventTypes type, const char* sysExData, int dataLen, bool ignoreOnExport = true) :
 		m_type( type ),
 		m_metaEvent( MidiMetaInvalid ),
 		m_channel( 0 ),
 		m_sysExData( sysExData ),
-		m_sourcePort( NULL )
+		m_sourcePort(nullptr),
+		m_ignoreOnExport(ignoreOnExport)
 	{
 		m_data.m_sysExDataLen = dataLen;
 	}
@@ -64,7 +67,8 @@ public:
 		m_channel( other.m_channel ),
 		m_data( other.m_data ),
 		m_sysExData( other.m_sysExData ),
-		m_sourcePort( other.m_sourcePort )
+		m_sourcePort(other.m_sourcePort),
+		m_ignoreOnExport(other.m_ignoreOnExport)
 	{
 	}
 
@@ -190,6 +194,16 @@ public:
 		setParam( 0, pitchBend );
 	}
 
+	bool ignoreOnExport() const
+	{
+		return m_ignoreOnExport;
+	}
+
+	void setIgnoreOnExport(bool value)
+	{
+		m_ignoreOnExport = value;
+	}
+
 
 private:
 	MidiEventTypes m_type;		// MIDI event type
@@ -205,6 +219,9 @@ private:
 	const char* m_sysExData;
 	const void* m_sourcePort;
 
+	// This helps us ignore MIDI events that shouldn't be processed
+	// during a project export, like physical controller events.
+	bool m_ignoreOnExport;
 } ;
 
 #endif

include/ModelView.h

@@ -36,6 +36,7 @@ public:
 	virtual ~ModelView();
 
 	virtual void setModel( Model* model, bool isOldModelValid = true );
+	virtual void unsetModel();
 
 	Model* model()
 	{