kev/Drawer/Module/GeoSigmaDraw/ItemCurve.cpp

#include "StdAfx.h"
#include "DCHelp.h"
#include "SigmaDoc.h"
#include ".\itemcurve.h"

#define PEN_WIDTH	2

CItemCurve::CItemCurve(CSigmaDoc * ppDoc)
	: CItem(ppDoc)
	, m_AddLineState(CURVE_STATE_LINE)
	, m_bContinuePen(FALSE)
	, m_bStretchStart(TRUE)
{
	m_AddLineState = ppDoc->GetEditLineStatus() % 4;

	this->SetType(ITEM_CURVE);
	m_pen.CreatePen(PS_SOLID, PEN_WIDTH, PEN_COLOR);
	m_oldLineState = 0;
	m_bAuxiliaryCurveRedraw = FALSE;
}

CItemCurve::~CItemCurve(void)
{
}

/**
 * @brief <EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ͼ״̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ״̬.
 *
 */
void CItemCurve::Reset(void)
{
	EraseScreenLines();
	PointList.RemoveAll();
	m_bContinuePen = FALSE;
	m_bStretchStart = TRUE;
}

void NItem::CItemCurve::OnCancel(void)
{
	Reset();
}

bool NItem::CItemCurve::GetAngleAndDistance(double &angle, double &distance) const
{
	if (std::isnan(m_angle) || std::isnan(m_distance))
	{
		return false;
	}

	angle = m_angle;
	distance = m_distance;

	return true;
}

BOOL CItemCurve::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
	if (this->IsEditState())
		return FALSE;
	//GetDoc()->GetCursor().SetCursor(CursorDrawCurve);
	//return GetDoc()->GetCursor().SetCursor();
	return TRUE;
}

POSITION CItemCurve::InsertPointWithPointDistance(double x, double y)
{
	if (PointList.GetCount() <= 1)
	{
		AddPointFromCoordinate(x, y);
		return PointList.GetHeadPosition();
	}
	CCurveEx* pc = new CCurveEx;
	pc->SetPoints(PointList, 2);
	double x0, y0, z0, l0;
	if (pc->PointDistance(x, y, l0) > 1e30)
	{
		delete pc;
		return NULL;
	}
	pc->GetCoordinate(l0, x0, y0, z0);
	int i = AfxGetPublicFunction()->BinarySearch(l0, pc->num, pc->l);
	dfPoint dp;
	dp.x0 = x0;
	dp.y0 = y0;
	POSITION pos = NULL;
	if (i < 0)
	{
		pos = AddPoint(dp, TRUE);
		REDO_ITEM item;
		item.point = dp;
		item.bHead = TRUE;
		item.pos = pos;
		UndoList.AddHead(item);
	}
	else if (i > pc->num - 1)
	{
		AddPointFromCoordinate(x0, y0);
		pos = PointList.GetTailPosition();
	}
	pos = PointList.FindIndex(i);
	if (pos != NULL)
	{
		pos = PointList.InsertAfter(pos, dp);
		REDO_ITEM item;
		item.point = dp;
		item.bHead = FALSE;
		item.pos = pos;
		UndoList.AddHead(item);
	}

	delete pc;
	return pos;
}

void CItemCurve::AddPointFromCoordinate(double x, double y)
{
	dfPoint dp;
	dp.x0 = x;
	dp.y0 = y;
	AddPoint(dp);
}

void CItemCurve::AddPoint(dfPoint point)
{
	POSITION pos = AddPoint(point, FALSE);
	REDO_ITEM item;
	item.point = point;
	item.bHead = FALSE;
	item.pos = pos;
	UndoList.AddHead(item);
}

void NItem::CItemCurve::AutoClose(void)
{
	if (PointList.IsEmpty()) return;
	dfPoint dp = PointList.GetHead();
	AddPoint(dp);
	m_dpLastMousePos = dp;
}

CSpatialIndex& NItem::CItemCurve::GetSpatialIndex()
{
	if (m_pSpatialIndex == nullptr)
	{
		m_pSpatialIndex = std::make_unique<CSpatialIndex>(*GetDoc()->GetDraw());
	}

	return *m_pSpatialIndex;
}

void CItemCurve::GetAnglePoint(dfPoint &ddp, double angle)
{
	if (PointList.GetCount() < 2) return;
	dfPoint pt, pp;
	POSITION p = PointList.GetTailPosition();
	pt = PointList.GetPrev(p);
	pp = PointList.GetPrev(p);
	CPoint2D cp; cp.x0 = pp.x0; cp.y0 = pp.y0;
	cp.Rotate(pt.x0, pt.y0, angle);
	if (fabs(angle - 90) < 1e-10 && fabs(pt.x0 - cp.x0) < 1e-10)
	{
		ddp.x0 = pt.x0;
		return;
	}
	double k, b;
	AfxGetPublicFunction()->GetKB(pt.x0, pt.y0, cp.x0, cp.y0, k, b);	//y=kx+b;
	double a = AfxGetPublicFunction()->GetAngle(pt.x0, pt.y0, pp.x0, pp.y0);
	if (fabs(a) < 45.0 || fabs(a) < 135.0)
		ddp.y0 = k * ddp.x0 + b;
	else
		ddp.x0 = (ddp.y0 - b) / k;
}

void NItem::CItemCurve::storeAngleAndDistance(dfPoint& point1, dfPoint& point2)
{
	m_angle = AfxGetPublicFunction()->GetAngle(point1.x0, point1.y0, point2.x0, point2.y0);
	if (m_angle < 0)
	{
		m_angle += 360;
	}

	double a = point2.x0 - point1.x0;
	double b = point2.y0 - point1.y0;
	m_distance = sqrt(a * a + b * b);
}

void NItem::CItemCurve::clearAngleAndDistance()
{
	m_angle = std::numeric_limits<double>::quiet_NaN();
	m_distance = std::numeric_limits<double>::quiet_NaN();
}

dfPoint CItemCurve::GetRealPoint(CPointList& pl, UINT nFlags, CPoint point)
{
	dfPoint dp = GetReal(point);
	if (pl.GetCount() > 0)
	{
		CurPoint = pl.GetTail();
		//if(nFlags & MK_SHIFT)//if the SHIFT key is down
		if (::IsKeyDown(VK_SHIFT)) // <20><><EFBFBD><EFBFBD> shift ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>45<34><35><EFBFBD><EFBFBD>ת
		{
			dp = GetShiftDownPoint(CurPoint.x0, CurPoint.y0, dp.x0, dp.y0);
			return dp;
		}
	}
	if (m_AddLineState == CURVE_STATE_ANGLE)
		GetAnglePoint(dp, 90.0);

	if (GetDoc()->IsSnapEnabled())
	{
		std::optional<CPoint2D> snapPoint = GetSpatialIndex().GetSnapPoint(dp, m_snapRange);
		if (snapPoint)
		{
			dfPoint point;
			point.x0 = snapPoint.value().x0;
			point.y0 = snapPoint.value().y0;
			return point;
		}
	}

	return dp;
}

void CItemCurve::OnLButtonDblClk(UINT nFlags, CPoint point)
{
	dfPoint dp = GetRealPoint(PointList, nFlags, point);
	if (fabs(dp.x0 - m_dpLastMousePos.x0) > ZERO || fabs(dp.y0 - m_dpLastMousePos.y0) > ZERO)
	{
		AddPoint(dp);
		m_dpLastMousePos = dp;
	}
	NextCurve();
}

void CItemCurve::OnLButtonDown(CDC *pDC, UINT nFlags, CPoint point, int vk)
{
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>δ<EFBFBD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᴥ<EFBFBD><E1B4A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD>ߣ<EFBFBD>m_bStretchStartΪTRUE
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD>ߣ<EFBFBD><DFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD><EFBFBD>β<EFBFBD><CEB2>
	if (!m_bStretchStart && PointList.GetCount() > 0)
	{
		EraseRubberLine();
		m_bStretchStart = TRUE;
	}
	//<2F><><EFBFBD>ӵ<EFBFBD>
	dfPoint dp = GetRealPoint(PointList, nFlags, point);
	AddPoint(dp);
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߶<EFBFBD>
	DrawAssistantLineLastSegment();
	m_dpLastMousePos = PointList.GetTail();
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD>
	ClearRedoList();
}

int CItemCurve::OnMouseMove(CDC* pDC, UINT nFlags, CPoint point)
{
	SetScreenDC(pDC);
	// <20><><EFBFBD><EFBFBD> shift ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>45<34><35><EFBFBD><EFBFBD>ת,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>
	dfPoint dp = GetRealPoint(PointList, nFlags, point);
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	if (m_bContinuePen && (nFlags & MK_LBUTTON))
	{
		AddPoint(dp);
	}
	else if (!PointList.IsEmpty())
	{
		dfPoint dpTail = PointList.GetTail();
		storeAngleAndDistance(dpTail, dp);
		CPoint  ptTail = GetDC()->GetScreen(dpTail);
		// <20><><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>point <20><>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>shift<66><74>ʱ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>45<34><35><EFBFBD>߼<EFBFBD><DFBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>겻<EFBFBD><EAB2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		CPoint ptCur = GetDC()->GetScreen(dp);
		CPoint  ptPrev = GetDC()->GetScreen(m_dpLastMousePos);
		if (m_bAuxiliaryCurveRedraw)
		{
			DrawRubberLine();
		}
		if (!m_bStretchStart)
		{
			DrawLineScreen(ptPrev.x, ptPrev.y, ptTail.x, ptTail.y);
		}
		DrawLineScreen(ptCur.x, ptCur.y, ptTail.x, ptTail.y);
	}
	else
	{
		clearAngleAndDistance();
	}
	m_dpLastMousePos = dp;
	m_bStretchStart = FALSE;
	m_bAuxiliaryCurveRedraw = FALSE;
	return 1;
}

void  CItemCurve::EraseAuxiliaryLines(CDC * pScreenDC)
{
	CXyDC * pDC = GetDC();
	if (pDC == 0)
		return;
	pDC->Create(pScreenDC);
	if (PointList.GetCount() == 0)
		return;
	int od = pScreenDC->SetROP2(R2_NOTXORPEN);
	CPen * pOld = pScreenDC->SelectObject(&m_pen);
	dfPoint dp;
	POSITION p = PointList.GetHeadPosition();

	dp = PointList.GetNext(p);
	pDC->MoveTo(dp.x0, dp.y0);
	while (p)
	{
		dp = PointList.GetNext(p);
		pDC->LineTo(dp.x0, dp.y0);
	}

	pScreenDC->SelectObject(pOld);
	pScreenDC->SetROP2(od);
	m_bAuxiliaryCurveRedraw = TRUE;
	m_bStretchStart = TRUE;
}

void CItemCurve::DrawAssistant(CDC * pScreenDC, int mouseX, int mouseY)
{
	CXyDC * pDC = GetDC();
	if (pDC == 0)
		return;
	pDC->Create(pScreenDC);
	if (PointList.GetCount() == 0)
		return;

	CPen * pOld = pScreenDC->SelectObject(&m_pen);
	dfPoint dp;
	POSITION p = PointList.GetHeadPosition();

	dp = PointList.GetNext(p);
	pDC->MoveTo(dp.x0, dp.y0);
	while (p)
	{
		dp = PointList.GetNext(p);
		pDC->LineTo(dp.x0, dp.y0);
	}
	pScreenDC->SelectObject(pOld);
	if (m_AddLineState != CURVE_STATE_SPLINE)
	{
		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD><EFBFBD>
		dp = PointList.GetTail();
		pDC->MoveTo(dp.x0, dp.y0);
		pDC->LineTo(m_dpLastMousePos.x0, m_dpLastMousePos.y0);
	}
	m_bAuxiliaryCurveRedraw = TRUE;
	m_bStretchStart = TRUE;
}

/**
 * @brief <EFBFBD><EFBFBD>Ļˢ<EFBFBD><EFBFBD>ȫͼ<EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ػ渨<EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
 *
 * @param pDC
 */
void CItemCurve::OnDraw(CXyDC* pXyDC, CDC* pDC)
{
	m_bStretchStart = TRUE;
}

BOOL CItemCurve::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
	dfPoint dp1;
	switch (nChar)
	{
	case VK_RETURN://VK_RETURN
		NextCurve();
		break;
	case VK_ESCAPE:
		//Reset();
		break;
	case VK_BACK://VK_BACK <20>ӵ<EFBFBD><D3B5>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD>ǰɾ<C7B0><C9BE>
	{
		if (m_AddLineState != CURVE_STATE_LINE)break;
		RemoveAssistantLineTailPoint();
	}
	break;
	case VK_DELETE:	//<2F>ӵ<EFBFBD><D3B5>б<EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ɾ<EFBFBD><C9BE>
		if (m_AddLineState != CURVE_STATE_LINE)break;
		RemoveAssistantLineFirstPoint();


		/*pos = PointList.GetHeadPosition();
		if (pos == NULL)break;
		dp1 = PointList.GetAt(pos);*/
		//RemoveAt(pos);
		//{
		//	REDO_ITEM item;
		//	item.point = dp1;
		//	item.bHead = TRUE;
		//	item.pos = NULL;
		//	UndoList.AddHead(item);
		//}

		break;
	}
	return FALSE;
}

BOOL CItemCurve::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags)
{
	if (nChar == VK_ESCAPE)
	{
		//Reset();
		return TRUE;
	}
	return FALSE;
}

void CItemCurve::OnLButtonUp(CDC *pDC, UINT nFlags, CPoint point, int vk)
{
}

int CItemCurve::GetSubMenu()
{
	return 4;
}

void CItemCurve::Draw(CXyDC* pDC, CPointList& pl, COLORREF color)
{
	if (pl.GetCount() <= 0) return;
	CPen* pOld = pDC->GetDC()->SelectObject(&m_pen);
	dfPoint dp;
	POSITION p = pl.GetHeadPosition();
	dp = pl.GetNext(p);
	pDC->MoveTo(dp.x0, dp.y0);
	pDC->LineTo(dp.x0, dp.y0);
	while (p)
	{
		dp = pl.GetNext(p);
		pDC->LineTo(dp.x0, dp.y0);
	}
	pDC->GetDC()->SelectObject(pOld);
}

void CItemCurve::RemoveAssistantLineTailPoint()
{
	POSITION startPos = NULL;
	POSITION endPos = NULL;
	POSITION pos = NULL;
	dfPoint	 startDp;
	dfPoint	 endDp;
	dfPoint	 dp;
	CPoint startPt;
	CPoint endPt;

	int count = PointList.GetCount();
	if (count > 1)
	{
		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD><EFBFBD>
		if (!m_bStretchStart) {
			DrawRubberLine();
		}
		startPos = PointList.FindIndex(count - 2);
		endPos = PointList.FindIndex(count - 1);
		startDp = PointList.GetAt(startPos);
		endDp = PointList.GetAt(endPos);
		startPt = GetDC()->GetScreen(startDp);
		endPt = GetDC()->GetScreen(endDp);
		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>ʱ<EFBFBD>߶<EFBFBD>
		CPen *pOld = m_pScreenDC->SelectObject(&m_pen);
		DrawLineScreen(startPt.x, startPt.y, endPt.x, endPt.y);
		m_pScreenDC->SelectObject(pOld);
		////UNDO
		//{
		//	REDO_ITEM item;
		//	item.point = endDp;
		//	item.bHead = FALSE;
		//	item.pos = NULL;
		//	UndoList.AddHead(item);
		//}
		PointList.RemoveTail();
		//<2F>ػ<EFBFBD><D8BB><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD><EFBFBD>
		DrawRubberLine();
		m_bStretchStart = FALSE;
	}
	else if (count == 1)
	{
		pos = PointList.FindIndex(0);
		dp = PointList.GetAt(pos);

		////UNDO
		//{
		//	REDO_ITEM item;
		//	item.point = dp;
		//	item.bHead = FALSE;
		//	item.pos = NULL;
		//	UndoList.AddHead(item);
		//}
		Reset();
	}
}

/**
 * @brief <EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD>뵽xy<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
 *
 */
void CItemCurve::DrawAssistantCurve()
{
	int count = PointList.GetCount();
	if (count < 2) return;

	CPen* pOld = m_pScreenDC->SelectObject(&m_pen);
	dfPoint dp;
	POSITION p = PointList.GetHeadPosition();
	dp = PointList.GetNext(p);
	CPoint pt1 = GetDC()->GetScreen(dp.x0, dp.y0);
	CPoint pt2;
	while (p)
	{
		dp = PointList.GetNext(p);
		pt2 = GetDC()->GetScreen(dp.x0, dp.y0);
		DrawLineScreen(pt1.x, pt1.y, pt2.x, pt2.y);
		pt1 = pt2;
	}
	m_pScreenDC->SelectObject(pOld);
}

/**
 * @brief <EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>.
 *
 */
void CItemCurve::DrawAssistantLineLastSegment()
{
	int count = PointList.GetCount();
	//<2F><><EFBFBD><EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㣬ֻ<E3A3AC><D6BB><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4><EFBFBD><EFBFBD>
	if (count < 2) return;
	//ʹ<><CAB9><EFBFBD>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ<EFBFBD>ʻ<EFBFBD>
	CPen* pOld = m_pScreenDC->SelectObject(&m_pen);
	dfPoint dp1;
	dfPoint dp2;
	CPoint pt1;
	CPoint pt2;
	POSITION p1;
	POSITION p2;

	p1 = PointList.FindIndex(count - 1);
	dp1 = PointList.GetNext(p1);
	pt1 = GetDC()->GetScreen(dp1.x0, dp1.y0);

	p2 = PointList.FindIndex(count - 2);
	dp2 = PointList.GetNext(p2);
	pt2 = GetDC()->GetScreen(dp2.x0, dp2.y0);
	DrawLineScreen(pt1.x, pt1.y, pt2.x, pt2.y);
	m_pScreenDC->SelectObject(pOld);
}

/**
 * @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ߵĵ<EFBFBD>һ<EFBFBD><EFBFBD>.
 *
 */
void CItemCurve::RemoveAssistantLineFirstPoint()
{
	int count = PointList.GetCount();
	//ֻ<><D6BB>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>ɾ<EFBFBD><C9BE><EFBFBD>൱<EFBFBD><E0B5B1><EFBFBD><EFBFBD>
	if (count <= 1)
	{
		Reset();
		return;
	}
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	CPen* pOld = m_pScreenDC->SelectObject(&m_pen);
	dfPoint dp1;
	dfPoint dp2;
	CPoint pt1;
	CPoint pt2;
	POSITION p1;
	POSITION p2;

	p1 = PointList.FindIndex(0);
	dp1 = PointList.GetNext(p1);
	pt1 = GetDC()->GetScreen(dp1.x0, dp1.y0);

	p2 = PointList.FindIndex(1);
	dp2 = PointList.GetNext(p2);
	pt2 = GetDC()->GetScreen(dp2.x0, dp2.y0);
	DrawLineScreen(pt1.x, pt1.y, pt2.x, pt2.y);
	m_pScreenDC->SelectObject(pOld);
	PointList.RemoveHead();
}


/**
 * @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD>൱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD>
 *
 */
void CItemCurve::DrawRubberLine()
{
	if (!m_pScreenDC)
	{
		return;
	}
	if (PointList.GetCount() <= 0)
		return;

	dfPoint p1 = PointList.GetTail();
	CPoint  ptT = GetDC()->GetScreen(p1);
	CPoint  ptPrev = GetDC()->GetScreen(m_dpLastMousePos);
	DrawLineScreen(ptPrev.x, ptPrev.y, ptT.x, ptT.y);
}

/**
 * @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD>൱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
 *
 */
void CItemCurve::EraseRubberLine()
{
	if (!m_pScreenDC)
	{
		return;
	}
	if (PointList.GetCount() <= 0)
		return;

	dfPoint p1 = PointList.GetTail();
	CPoint  ptT = GetDC()->GetScreen(p1);
	CPoint  ptPrev = GetDC()->GetScreen(m_dpLastMousePos);
	DrawLineScreen(ptPrev.x, ptPrev.y, ptT.x, ptT.y);
}

/**
 * @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD>ϻ<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD>h<EFBFBD>ߺͱ<EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
 *
 */
void CItemCurve::EraseScreenLines()
{
	int count = PointList.GetCount();
	if (!m_bStretchStart)
	{
		EraseRubberLine();
	}
	if (count > 1)
	{
		DrawAssistantCurve();
	}
}

POSITION CItemCurve::NextCurve(void)
{
	if (PointList.GetCount() == 0) return NULL;
	if (PointList.GetCount() <= 1)
	{
		Reset();
		return NULL;
	}
	CCurveEx* pCurve = new CCurveEx();
	pCurve->SetPoints(PointList, 2);
	POSITION pos = AddElement(pCurve, DOUBLEFOX_CURVE);
	Reset();
	return pos;
}

void CItemCurve::RedrawScreenLines()
{
	int count = PointList.GetCount();
	if (!m_bStretchStart)
	{
		DrawRubberLine();
	}
	if (count > 1)
	{
		DrawAssistantCurve();
	}

}

void CItemCurve::Undo(void)
{
	if (UndoList.GetCount() == 0) return;
	REDO_ITEM item, it;
	item = UndoList.RemoveHead();
	int i = 0;
	it = item;
	while (1)
	{
		if (item.pos)//<2F><><EFBFBD>ӵĵ㣬<C4B5><E3A3AC>Ҫɾ<D2AA><C9BE>
		{
			RemoveAt(it.pos);
			it.pos = NULL;
		}
		else//ɾ<><C9BE><EFBFBD>ĵ㣬<C4B5><E3A3AC>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>
		{
			it.pos = AddPoint(it.point, it.bHead);
		}
		RedoList.AddHead(it);
		i++;
		if (i >= item.num)break;
		it = UndoList.RemoveHead();
	}
}

void NItem::CItemCurve::ClearRedoList(void)
{
	RedoList.RemoveAll();
}

void CItemCurve::Redo(void)
{
	if (RedoList.GetCount() == 0) return;
	REDO_ITEM item, it;
	item = RedoList.RemoveHead();
	int i = 0;
	while (1)
	{
		it = item;
		if (it.pos)
		{
			RemoveAt(it.pos);
			it.pos = NULL;
		}
		else
		{
			it.pos = AddPoint(it.point, it.bHead);
		}
		UndoList.AddHead(it);
		i++;
		if (i >= item.num) break;
		it = RedoList.RemoveHead();
	}
}

BOOL CItemCurve::IsCanUndo(void)
{
	return (BOOL)UndoList.GetCount();
}

BOOL CItemCurve::IsCanRedo(void)
{
	return (BOOL)RedoList.GetCount();
}

int CItemCurve::RemoveAt(POSITION pos)
{
	if (pos == NULL) return 0;
	if (PointList.GetCount() == 0) return 0;
	int result = 0;
	POSITION pHead = PointList.GetHeadPosition();
	POSITION pTail = PointList.GetTailPosition();
	dfPoint dp1, dp2;
	POSITION p = pos;
	if (pos == pTail)//ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>
	{
		dp1 = PointList.GetPrev(p);
		dp2 = dp1;
		//DrawLine(dp1.x0,dp1.y0,PrevPoint.x0,PrevPoint.y0);

		if (p)dp2 = PointList.GetPrev(p);
		if (PointList.GetCount() > 1)
		{
			//CPen* pOld=GetDC()->GetDC()->SelectObject(&m_pen);
			//DrawLine(dp1.x0,dp1.y0,dp2.x0,dp2.y0);
			//GetDC()->GetDC()->SelectObject(pOld);
		}

		//if(PointList.GetCount()>1)
			//DrawLine(dp2.x0,dp2.y0,PrevPoint.x0,PrevPoint.y0);
		result = 3;
	}
	else if (pos == pHead)//ɾ<><C9BE><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>
	{
		dp1 = PointList.GetNext(p);
		dp2 = dp1;
		if (p) dp2 = PointList.GetNext(p);

		//if(PointList.GetCount()==1)
		//	DrawLine(dp1.x0,dp1.y0,PrevPoint.x0,PrevPoint.y0);
		//else
		//{
		//	CPen* pOld=GetDC()->GetDC()->SelectObject(&m_pen);
		//	DrawLine(dp1.x0,dp1.y0,dp2.x0,dp2.y0);
		//	GetDC()->GetDC()->SelectObject(pOld);
		//}
		result = 1;
	}
	else//ɾ<><C9BE><EFBFBD>м<EFBFBD><D0BC><EFBFBD>
	{
		dfPoint dp = PointList.GetAt(p);
		dp1 = PointList.GetNext(p); if (p) dp1 = PointList.GetAt(p);
		p = pos;
		dp2 = PointList.GetPrev(p); if (p) dp2 = PointList.GetPrev(p);

		//CPen* pOld=GetDC()->GetDC()->SelectObject(&m_pen);
		//DrawLine(dp.x0,dp.y0,dp2.x0,dp2.y0);
		//DrawLine(dp.x0,dp.y0,dp1.x0,dp1.y0);
		//DrawLine(dp2.x0,dp2.y0,dp1.x0,dp1.y0);
		//GetDC()->GetDC()->SelectObject(pOld);
		result = 2;
	}
	PointList.RemoveAt(pos);
	return result;
}

POSITION CItemCurve::AddPoint(dfPoint point, BOOL bHead)
{
	POSITION pos = NULL;
	if (bHead)
	{
		pos = PointList.AddHead(point);
	}
	else
	{
		pos = PointList.AddTail(point);
	}
	return pos;
}

void CItemCurve::SetCurveState(int state, CDC * pDC)
{
	m_oldLineState = m_AddLineState;
	m_AddLineState = state;
	m_bStretchStart = TRUE;
	m_pDoc->SetEditLineStatus(m_AddLineState);
}

void CItemCurve::RestoreCurveState(void)
{
	m_AddLineState = m_oldLineState;
	m_pDoc->SetEditLineStatus(m_AddLineState);
}

BOOL NItem::CItemCurve::IsLineState(void)
{
	if (m_AddLineState == CURVE_STATE_LINE)
		return TRUE;
	return FALSE;
}

COne* CItemCurve::CreateOne()
{
	CCurveEx* pCurve = new CCurveEx;
	if (PointList.GetCount() <= 1)
	{
		PointList.RemoveAll();
		return NULL;
	}
	pCurve->SetPoints(PointList, 2);
	return m_pDoc->GetDraw()->CreateOne(pCurve, DOUBLEFOX_CURVE);
	return NULL;
}

int CItemCurve::PopupNameDialog(CXy* pxy, POSITION pos)
{
	return 1;
	/*
	if(!::GetPreferences().WorkaroundEdit.m_bPopupNameDlg) return 0;
	if(pos==NULL || pxy==NULL) return 0;

	CDlgName dlg;
	if(::GetPreferences().WorkaroundEdit.m_bContourAuto)
	{
		AfxGetPublicFunction()->FloatToString(dlg.m_strName, ::GetPreferences().WorkaroundEdit.m_dContourStart);
		::GetPreferences().WorkaroundEdit.m_dContourStart += ::GetPreferences().WorkaroundEdit.m_dContourStep;
	}

	if(dlg.DoModal()!=IDOK) return 0;

	COne* pOne=pxy->GetAt(pos);
	pOne->SetName(dlg.m_strName);

	if(::GetPreferences().WorkaroundEdit.m_bContourAuto)
	{
		::GetPreferences().WorkaroundEdit.m_dContourStart = atof(dlg.m_strName);
		::GetPreferences().WorkaroundEdit.m_dContourStart += ::GetPreferences().WorkaroundEdit.m_dContourStep;
	}
	return 1;
	*/
}

//void CItemCurve::OnMouseMoveStatus(CDC* pDC, UINT nFlags, CPoint point)// , BYTE*& destBuffer, int& destLen)
//{
//	SetScreenDC(pDC);
//	dfPoint dp=GetRealPoint(PointList,nFlags, point);
//
//	//<2F><><EFBFBD><EFBFBD>״̬<D7B4><CCAC><EFBFBD><EFBFBD>Ϣ
//	//if(PointList.GetCount()>0)
//	//	SetStatusBarLengthInfo(CurPoint.x0, CurPoint.y0, dp.x0, dp.y0);// , destBuffer, destLen);
//
//	if(m_bContinuePen && nFlags & MK_LBUTTON)
//	{
//		AddPoint(dp);
//	}
//	else if(!PointList.IsEmpty())
//	{
//		dfPoint p1 = PointList.GetTail();
//		CPoint  ptT = GetDC()->GetScreen(p1);
//		//<2F><><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>point <20><>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>shift<66><74>ʱ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>45<34><35><EFBFBD>߼<EFBFBD><DFBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>겻<EFBFBD><EAB2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//		CPoint  ptCur = GetDC()->GetScreen(dp);
//		if (!m_bStretchStart)
//		{
//			CPoint  ptPrev = GetDC()->GetScreen(PrevPoint);
//			DrawLineScreen(ptPrev.x, ptPrev.y, ptT.x, ptT.y);
//		}
//		DrawLineScreen(ptCur.x, ptCur.y, ptT.x, ptT.y);
//		m_bStretchStart = false;
//	}
//	PrevPoint=dp;
//	//TRACE("PrevPoint:%f, %f\n", PrevPoint.x0, PrevPoint.y0);
//}


//void CItemCurve::OnMouseMove(UINT nFlags, CPoint point)
//{
//	CPointList PointList;
//	dfPoint CurPoint;
//	
//	//CItemBase* itemBase = new CItemBase();
//	dfPoint dp = GetRealPoint(PointList, nFlags, point);
//
//	//<2F><><EFBFBD><EFBFBD>״̬<D7B4><CCAC><EFBFBD><EFBFBD>Ϣ
//	if (PointList.GetCount() > 0)
//		SetStatusBarLengthInfo(CurPoint.x0, CurPoint.y0, dp.x0, dp.y0);
//
//	if (m_bContinuePen && nFlags & MK_LBUTTON)
//	{
//		AddPoint(dp);
//	}
//	else if (!PointList.IsEmpty())
//	{
//		dfPoint p1 = PointList.GetTail();
//		DrawLineReal(PrevPoint.x0, PrevPoint.y0, p1.x0, p1.y0);
//		DrawLineReal(dp.x0, dp.y0, p1.x0, p1.y0);
//	}
//	PrevPoint = dp;
//}


//=====================