Ability to delete mixer channels in the FX Mixer

Users can now delete mixer channels from the FX mixer, and it
doesn't mess up the instrument send channels.

include/FxLine.h

@@ -21,11 +21,11 @@ public:
 	virtual void mouseDoubleClickEvent( QMouseEvent * );
 
 	inline int channelIndex() { return m_channelIndex; }
+	inline void setChannelIndex(int index) { m_channelIndex = index; }
 
 	knob * m_sendKnob;
 	SendButtonIndicator * m_sendBtn;
 
-
 private:
 	FxMixerView * m_mv;
 

include/FxMixer.h

@@ -109,6 +109,13 @@ public:
 	// returns the index of the channel that was just added
 	int createChannel();
 
+	// delete a channel from the FX mixer.
+	void deleteChannel(int index);
+
+	// re-arrange channels
+	void moveChannelLeft(int index);
+	void moveChannelRight(int index);
+
 	// reset a channel's name, fx, sends, etc
 	void clearChannel(fx_ch_t channelIndex);
 

include/FxMixerView.h

@@ -52,15 +52,16 @@ public:
 		FxChannelView(QWidget * _parent, FxMixerView * _mv, int _chIndex );
 
 		FxLine * m_fxLine;
-		//EffectRackView * m_rackView;
 		pixmapButton * m_muteBtn;
 		fader * m_fader;
-	} ;
+	};
 
 
 	FxMixerView();
 	virtual ~FxMixerView();
 
+	virtual void keyPressEvent(QKeyEvent * e);
+
 	virtual void saveSettings( QDomDocument & _doc, QDomElement & _this );
 	virtual void loadSettings( const QDomElement & _this );
 
@@ -81,7 +82,10 @@ public:
 
 
 	// display the send button and knob correctly
-	void updateFxLine(int i);
+	void updateFxLine(int index);
+
+	// notify the view that an fx channel was deleted
+	void deleteChannel(int index);
 
 private slots:
 	void updateFaders();