geopolyline.cpp

VC++开发广州市交通运输干线

// GeoPolyline.cpp: implementation of the CGeoPolyline class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "DigitalMap.h"
#include "GeoPolyline.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CGeoPolyline::CGeoPolyline()
{

}

CGeoPolyline::CGeoPolyline(CGeoPointXY *ptXY,int pointNums,int attriCode)
{
	for(int i=0;i<pointNums;i++)
	{
		m_vecPolyPoint.push_back(ptXY[i]);
	}
	m_attriCode = attriCode;
}

CGeoPolyline::~CGeoPolyline()
{

}

void CGeoPolyline::SetPolylineXY(CGeoPointXY *ptXY,int pointNums)
{
	//用已有的数据设置值
	for(int i=0;i<pointNums;i++)
	{
		m_vecPolyPoint.push_back(ptXY[i]);
	}
}


//这个函数错误的，会出现指针越界
void CGeoPolyline::GetPolylineXY(CGeoPointXY *ptXY,int &pointNums)
{
	//取出
	for(int i=0;i<m_vecPolyPoint.size();i++)
	{
		ptXY[i] = m_vecPolyPoint.at(i);
	}
	pointNums = m_vecPolyPoint.size();
}

void CGeoPolyline::Draw(CDC *pDC,BOOL bDisplay)
{
	if(bDisplay==0)//就是擦除图像
	return;//	pDC->SetROP2(R2_NOTXORPEN);
	POINT beginPoint;
	beginPoint.x = m_vecPolyPoint.at(0).X;
	beginPoint.y = m_vecPolyPoint.at(0).Y;
	pDC->MoveTo(beginPoint);
	for(int i=1;i<m_vecPolyPoint.size();i++)
	{
		POINT nextPoint;
		nextPoint.x = m_vecPolyPoint.at(i).X;
		nextPoint.y = m_vecPolyPoint.at(i).Y;
		pDC->LineTo(nextPoint);
	}

}