//---------------------------------------------------------------------------

#ifndef ComposePanelUnitH
#define ComposePanelUnitH
//---------------------------------------------------------------------------
#include "ShowBarsPanelUnit.h"
//#include "BackupUnit.h"

namespace ComposePanelUnit
{

//---------------------------------------------------------------------------
class TPanel : public TShowBarsPanel
{
__published:
	void __fastcall StageHeaderMouseDown(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y);

private:
	TComponentList * m_lstStageHeader;
//	TComposeBackup m_bkCompose;
//	TMelodyBackup m_bkMelody;

	TImage *m_imgDrag;
	int m_xImgDrag,
		m_yImgDrag,
		m_iDragOverPos,
		m_iDragingStage;
	bool m_bDraging,
		m_bAddStage;

	int m_nChordWidth,
		m_nChordHeight,
		m_iFocusStage;

	TImage * NewStageHeader( int iStage );
	void UpdateStageHeader( int iStage );
	void AddStageHeader( int iInsStage, int iShowBar, int iComposeStage );
	void RemoveStageHeader( int iDelStage );
	void UpdateDragOverPos( int iNewPos );
	int FirstBar( int iStage );
	void InvalidateStage( int iStage, int iArea=BAR_DATA );
	void UpdateHeaders( int iStart=0 );

protected:
	virtual void __fastcall CreateWnd();
	virtual void __fastcall Paint(void);
	virtual void __fastcall SetBarTitle( int iBar, String& strText );
	virtual void __fastcall DrawBarBkgnd( int iBar, int left, int top );
	virtual void __fastcall DrawBarContext( int iBar, int left, int top );
	virtual void __fastcall DrawBarOperation( int iBar, int left, int top );
	virtual void __fastcall BarPosChanged();
//	DYNAMIC void __fastcall KeyDown(System::Word &Key, System::Classes::TShiftState Shift);

public:
	__fastcall virtual TPanel(System::Classes::TComponent* AOwner);
	__fastcall ~TPanel();

	void InitialVars();
	int ComposeBarCount(){ return m_nBarNum; };
//	BOOL CheckModify( int iCheckType=CHECK_ALL );
//	void BackupModify();
//	void RestoreModify();

	int FindStage( int iBar, int *piFirstBar=NULL );
	void SetFocusStage( int iStage );
	void SetBarFill( int iBar, int iFill );
	void SetStageVar( int iStage, int iVar );
	void SetStageStyle( int iStage, int idStyle );

	void SetDragImage( TImage* img ){ m_imgDrag = img; };
	void SetDragState( bool bDraging );
	void SetDragStage( bool bAdd, int iStage );
	void SetDragImgPos( int X, int Y );
	BOOL SetDragingPoint( int X, int Y );
	int SetDropPoint( int X, int Y );
	void InsertStage( int iStage, int iInsertPos );
	void AddStage( int iStage );
	void DeleteStage( int iStage );
	void MoveStage( int iSource, int iDest );
};

}

using namespace ComposePanelUnit;
#endif