Ability to save mixer sends to disk with the mmp

LMMS can load projects with the old mixer and new projects with
the new mixer. By "new mixer", I simply mean not hardcoded to 64
channels.

include/AutomatableModel.h

@@ -280,18 +280,6 @@ signals:
 	inline type maxValue() const								\
 	{															\
 		return AutomatableModel::maxValue<type>();				\
-	}															\
-																\
-	inline void setMinValue(type val)							\
-	{															\
-		m_minValue = val;										\
-		if( m_value < m_minValue ) m_value = m_minValue;		\
-	}															\
-																\
-	inline void setMaxValue(type val)							\
-	{															\
-		m_maxValue = val;										\
-		if( m_value > m_maxValue ) m_value = m_maxValue;		\
 	}
 
 // some typed AutomatableModel-definitions

include/FxLine.h

@@ -5,6 +5,7 @@
 #include <QLabel>
 
 #include "knob.h"
+#include "lcd_spinbox.h"
 #include "SendButtonIndicator.h"
 
 class FxMixerView;
@@ -15,19 +16,21 @@ class FxLine : public QWidget
 	Q_OBJECT
 public:
 	FxLine( QWidget * _parent, FxMixerView * _mv, int _channelIndex);
+	~FxLine();
 
 	virtual void paintEvent( QPaintEvent * );
 	virtual void mousePressEvent( QMouseEvent * );
 	virtual void mouseDoubleClickEvent( QMouseEvent * );
 
 	inline int channelIndex() { return m_channelIndex; }
-	inline void setChannelIndex(int index) { m_channelIndex = index; }
+	void setChannelIndex(int index);
 
 	knob * m_sendKnob;
 	SendButtonIndicator * m_sendBtn;
 
 private:
 	FxMixerView * m_mv;
+	lcdSpinBox * m_lcd;
 
 
 	int m_channelIndex;

include/FxMixer.h

@@ -73,9 +73,6 @@ public:
 	void prepareMasterMix();
 	void masterMix( sampleFrame * _buf );
 
-
-	void clear();
-
 	virtual void saveSettings( QDomDocument & _doc, QDomElement & _parent );
 	virtual void loadSettings( const QDomElement & _this );
 
@@ -112,6 +109,9 @@ public:
 	// delete a channel from the FX mixer.
 	void deleteChannel(int index);
 
+	// delete all the mixer channels except master and remove all effects
+	void clear();
+
 	// re-arrange channels
 	void moveChannelLeft(int index);
 	void moveChannelRight(int index);
@@ -128,6 +128,9 @@ private:
 	// the fx channels in the mixer. index 0 is always master.
 	QVector<FxChannel *> m_fxChannels;
 
+
+	void allocateChannelsTo(int num);
+
 	friend class mixerWorkerThread;
 	friend class FxMixerView;
 

include/FxMixerView.h

@@ -91,6 +91,10 @@ public:
 	void moveChannelLeft(int index);
 	void moveChannelRight(int index);
 
+	// make sure the display syncs up with the fx mixer.
+	// useful for loading projects
+	void refreshDisplay();
+
 private slots:
 	void updateFaders();
 	void addNewChannel();