#include "stdafx.h"
#include "ActionCurveEdit.h"
#include "SigmaDoc.h"
#include "Visitor.h"

namespace NAction
{
	CActionCurveEdit::CActionCurveEdit()
		: CActionItem(nullptr, 0)
	{
	}

	CActionCurveEdit::CActionCurveEdit(CSigmaDoc * pDoc, UINT actionType, POSITION pos)
	:CActionItem(pDoc, actionType),
	 m_posOfCurve(pos),
	 m_indexOfNodeForUndo(-1),
	 m_nodeXForUndo(0),
	 m_nodeYForUndo(0),
	 m_indexOfNodeForRedo(-1),
	 m_nodeXForRedo(0),
	 m_nodeYForRedo(0)
{
}

void CActionCurveEdit::Undo()
{
	CCurveEx * pCurve = GetCurve();
	if (pCurve == 0)
		return;

	if (m_indexOfNodeForUndo < 0 || m_indexOfNodeForUndo >= pCurve->num)
		return;

	pCurve->x[m_indexOfNodeForUndo] = m_nodeXForUndo;
	pCurve->y[m_indexOfNodeForUndo] = m_nodeYForUndo;
}

void CActionCurveEdit::Redo()
{
	CCurveEx * pCurve = GetCurve();
	if (pCurve == 0)
		return;

	if (m_indexOfNodeForRedo < 0 || m_indexOfNodeForRedo >= pCurve->num)
		return;

	pCurve->x[m_indexOfNodeForRedo] = m_nodeXForRedo;
	pCurve->y[m_indexOfNodeForRedo] = m_nodeYForRedo;
}

void CActionCurveEdit::BackupUndoNode(int indexOfNode, double nodeX, double nodeY)
{
	m_indexOfNodeForUndo = indexOfNode;
	m_nodeXForUndo = nodeX;
	m_nodeYForUndo = nodeY;
}

void CActionCurveEdit::BackupRedoNode(int indexOfNode, double nodeX, double nodeY)
{
	m_indexOfNodeForRedo = indexOfNode;
	m_nodeXForRedo = nodeX;
	m_nodeYForRedo = nodeY;
}

void CActionCurveEdit::accept(CActionVisitor& visitor)
{
	visitor.visit(*this);
}

CCurveEx * CActionCurveEdit::GetCurve()
{
	COne * pOne = GetDoc()->GetDraw()->GetAt(m_posOfCurve);
	if (pOne == 0)
		return 0;

	if (pOne->GetType() != DOUBLEFOX_CURVE)
		return 0;

	CCurveEx * pCurve = (CCurveEx*)GetDoc()->GetDraw()->GetAtValue(m_posOfCurve);
	return pCurve;
}
} //end namespace