#include "StdAfx.h"
#include ".\pointobj.h"

#include "visdrawview.h"
#include "visdrawdoc.h"


IMPLEMENT_SERIAL(CPointObj, CFigureObj, 0)
CPointObj::CPointObj(void)
{
}

CPointObj::~CPointObj(void)
{
}

CPointObj::CPointObj(const CRect& position)
		: CFigureObj(position)
{
	ASSERT_VALID(this);	

	m_pointx = 0.0;
	m_pointy = 0.0;
	
}

void CPointObj::Draw(CVisDrawView* pView, CDC* pDC)
{
	ASSERT_VALID(this);

	CBrush brush;
	if (!brush.CreateBrushIndirect(&m_logbrush))
		return;
	CPen pen;
	if (!pen.CreatePenIndirect(&m_logpen))
		return;

	CBrush* pOldBrush;
	CPen* pOldPen;

	if (m_bBrush)
		pOldBrush = pDC->SelectObject(&brush);
	else
		pOldBrush = (CBrush*)pDC->SelectStockObject(NULL_BRUSH);

	if (m_bPen)
		pOldPen = pDC->SelectObject(&pen);
	else
		pOldPen = (CPen*)pDC->SelectStockObject(NULL_PEN);

	//把點的世界坐標轉化為邏輯坐標
	CPoint nPoint;
	pView->WorldToClient(nPoint,m_pointx,m_pointy);

	pDC->SetPixel(nPoint.x,nPoint.y,m_logpen.lopnColor);

	pDC->SelectObject(pOldBrush);
	pDC->SelectObject(pOldPen);
}

void CPointObj::Serialize(CArchive& ar)
{
	ASSERT_VALID(this);
	//調用基類串行化
	CFigureObj::Serialize(ar);

	if (ar.IsStoring())
	{
		ar << m_pointx << m_pointy;		
	}
	else
	{
		ar >> m_pointx >> m_pointy;
	}
}

void CPointObj::SetPoint(double pointx, double pointy)
{
	m_pointx = pointx;
	m_pointy = pointy;
}
	
void CPointObj::GetPoint(double& pointx, double& pointy)
{
	pointx = m_pointx;
	pointy = m_pointy;
}

//計算外接矩形，以邏輯坐標表示
CRect CPointObj::CalcBounds(CVisDrawView* pView)
{
	CPoint nPoint;

	pView->WorldToClient(nPoint,m_pointx,m_pointy);

	m_position = CRect(nPoint, CSize(1, 1));

	return m_position;
}

//圖元拾取判斷函數
BOOL CPointObj::IsSelected(CVisDrawView* pView, const CPoint& point)
{
	//參數point是鼠標的邏輯坐標
	int distance, nSelectDistance;
	
	CPoint local;
	local = point;
	//鼠標點的設備坐標
	pView->DocToClient(local);

	//識別精度值
	nSelectDistance = pView->GetDocument()->GetSetectDistance()/2;
	
	CPoint pt;
	//把點的坐標轉化為邏輯坐標
	pView->WorldToClient(pt, m_pointx, m_pointy);

	//把點的坐標由邏輯坐標轉化為設備坐標
	pView->DocToClient(pt);

	//計算鼠標點point與點pt之間的像素距離

	distance = (int)PointToPoint(pt,local);

	//根據拾取條件判斷圖元是否被拾取
	return (distance < nSelectDistance);
	
}

//返回手柄個數
int CPointObj::GetHandleCount()
{
	ASSERT_VALID(this);

	return 1;
}

// 返回手柄中心邏輯坐標
CPoint CPointObj::GetHandle(CVisDrawView* pView, int nHandle)
{
	ASSERT_VALID(this);
	
	return CFigureObj::GetHandle(pView, nHandle);
}

// delta為邏輯坐標
void CPointObj::MoveTo(CPoint delta, CVisDrawView* pView)
{
	ASSERT_VALID(this);	
	//把delta轉化為世界坐標
	double pointx,pointy;
	pointx = pView->ClientToWorld(delta.x);
	pointy = -pView->ClientToWorld(delta.y);


	//修改點坐標
	m_pointx += pointx;
	m_pointy += pointy;   

	//重新計算邊界矩形
	CalcBounds(pView);

	//修改文檔標志	
	m_pDocument->SetModifiedFlag();
}