mifdoc.cpp

地理信息系统常用数据交换文件Mif格式的读取,适合于地理信息系统、遥感、城市规划等专业开发人员使用

// MIFDoc.cpp : implementation of the CMIFDoc class
//

#include "stdafx.h"
#include "MIF.h"
#include "fstream.h"

#include "MIFDoc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMIFDoc

IMPLEMENT_DYNCREATE(CMIFDoc, CDocument)

BEGIN_MESSAGE_MAP(CMIFDoc, CDocument)
	//{{AFX_MSG_MAP(CMIFDoc)
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMIFDoc construction/destruction

CMIFDoc::CMIFDoc()
{
	// TODO: add one-time construction code here
   	num_pt_type = 0;
	num_ln_type = 0;
	num_pg_type = 0;
	pt_type = NULL;
	ln_type = NULL;
	pg_type = NULL;
	redraw = false;

}

CMIFDoc::~CMIFDoc()
{
	//释放各类目标空间
	free_pt_type();
	free_ln_type();
	free_pg_type();

	//delete对象数组
     
   for(int i = 0;i < num_pg_type;i++)
	{

		PolygonType * type = &pg_type[i];

		for(int j = 0;j < type->pg[j].num_pt; j++)
		{
		delete	[](char*)type->pg[j].pt ;

		type->pg[j].pt = NULL;  
		}
 
   }

    for(int k = 0;k < num_ln_type;k++)
	{
		LineType * type = &ln_type[k];

	for(int l = 0;l < type->ln[k].num_pt; l++)
		{
		delete	[](char*)type->ln[l].pt ;

		type->ln[l].pt = NULL;  
		}
   }




}

BOOL CMIFDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CMIFDoc serialization

void CMIFDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		// TODO: add storing code here
	}
	else
	{
		// TODO: add loading code here
	}
}

/////////////////////////////////////////////////////////////////////////////
// CMIFDoc diagnostics

#ifdef _DEBUG
void CMIFDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CMIFDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMIFDoc commands

void CMIFDoc::OnFileOpen() 
{
	// TODO: Add your command handler code here

	//获得文件名,存入filename字符串中
	OPENFILENAME ofn;
	char filename[2048] = "";
	
	//初始化OPENFILENAME结构
	ZeroMemory(&ofn, sizeof(OPENFILENAME));
	ofn.lStructSize = sizeof(OPENFILENAME);
	ofn.hwndOwner = NULL;
	ofn.lpstrFile = filename;
	ofn.nMaxFile = sizeof(filename);
	ofn.lpstrFilter = "MapInfo MIF索引文件(*.mif)\0*.mid\0All(*.*)\0*.*\0";
	ofn.nFilterIndex = 1;
	ofn.lpstrFileTitle = NULL;
	ofn.nMaxFileTitle = 0;
	ofn.lpstrInitialDir = NULL;
	ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

	//打开资源管理器选择文件
	if (!GetOpenFileName(&ofn))
	{
		return;
	}

  //从filename中提取路径名
  char path[1024] = "",title[1024] = "";
  char file[1024] = "",tfile[1024] = "";
  int i = strlen(filename)-1;
  while (i >= 0 && filename[i] != '\\') i--;
  strncpy(path, filename, i);
  path[i]=0;

  //从filename中提取扩展名
  CString FileName((LPCSTR)filename);
  CString ext=FileName.Right(4);

  //比较文件后缀名 .mid
  if(!ext.CompareNoCase(".mid"))
  {
		//打开文件并读取
		ifstream in(filename);
		if (!in)	return;
		
		while (!in.eof())
		{
			in >> title;		   
			if (strncmp(title,"点文件",6)==0 )
			{
				in >> file;
				sprintf(tfile, "%s\\%s", path, file);
				//将path,file一起读入tfile，得到新的文件名tfile
				load_pt_mapinfo(tfile);
			}
			else if (strncmp(title, "线文件", 6) == 0)
			{
				in >> file;
				sprintf(tfile, "%s\\%s", path, file);
				load_ln_mapinfo(tfile);
			}
			else if (strncmp(title, "多边形文件", 10) == 0)
			{
				in >> file;
				sprintf(tfile, "%s\\%s", path, file);
				load_pg_mapinfo(tfile);
			}			
		}
		in.close();	
		}	
   this->UpdateAllViews(NULL);
}

void CMIFDoc::load_pt_mapinfo(char * filename)
{
	//颜色表处理
  	unsigned int color;
	float red,green,blue,alpha,size;
	red=1.0;
	green=0.5;
	blue=0.5;
	alpha=1.0;
	size=5;
	color = PACK_COLOR((int)(red*255), (int)(green*255), (int)(blue*255), (int)(alpha*255));

  //从filename中提取路径名
  char datapath[256] = "";//文件路径名
  char datafile[256] = "";//文件名

  char line[128] = "";//文件中一行字符串
  char str[32] = "";  //行中一个字符串
  char name[16] = ""; //文件名
  
  int k = strlen(filename)-1;
  while (k >= 0 && filename[k] != '\\') k--;
  strncpy(datapath, filename, k);
  datapath[k]=0;

  //数据文件索引文件
	ifstream in2(filename);
	if (!in2) return ;

	//首先释放以前的点信息，然后读取新的点地理信息
     free_pt_type();
   
	//读取点文件数目，存入num_pt_type
	in2.getline(line, sizeof(line));
	sscanf(line, "%d", &num_pt_type);

	if (num_pt_type == 0)
	{
		 AfxMessageBox("mif point file open error");
			return ;
		}
          
	//建立num_pt_type个点对象
    //下面是2种建立对象指针数组的方法:
    //pt_type = new PointType[num_pt_type];
    ///下面建立pt_type的点对象数组的方法比较好，建议以后都采用这种方式！！！
	pt_type = (PointType*) new char[sizeof(PointType) * num_pt_type];
    for(int i = 0;i<num_pt_type;i++)
	{
		PointType * type = &pt_type[i];
       

		//读取真正的数据文件名，存在datafile
       in2.getline(datafile,sizeof(datafile));

   
	   //读取颜色表信息
	   in2.getline(line, sizeof(line));
	   sscanf(line,  "%f %f %f %f %f", &red, &green, &blue, &alpha, &size);
      
	   //获取真正的全路径文件名，覆盖datafile,此时的datafile是文件全路径名
		strcpy(line, datafile);  
		strcpy(datafile, datapath);   
		strcat(datafile, "\\");
		strcat(datafile, line);
   			
		//用读取的文件名作为该类点文件名
          int k = strlen(line)-1;
         while (k >= 0 && line[k] != '.') k--;
         strncpy(name, line, k);
         name[k]=0;
         strcpy(type->name,name);
		
		//开始读真正的数据文件，对数据文件进行操作
		//换用iostream来读文件！！！
       ifstream in3(datafile);
    	if (!in3) 
		{
		 AfxMessageBox("mif point file open error");
			return ;
		}
        
//////////////////////////////////以下只读取了"version 300"一行，其余行都可以按照下面的方法读取
		//读取文件版本
		int ver=0;
		in3.getline(line,sizeof(line));
		sscanf(line,"%s %d",str,&ver);
				
		//获得文件中点数目
		int pointnum=0;

		//当文件未结束且文件未出现错误执行	
		while(!in3.eof())
		{
			in3.getline(line,sizeof(line));
			sscanf(line,"%s",str);
			if((strcmp(str,"Text")==0)||(strcmp(str,"text")==0)||(strcmp(str,"Point")==0)||(strcmp(str,"point")==0))
			{
				pointnum++;				
			}

		}

        type->num_pt = pointnum;
		//关闭in3
		in3.close();

		
		//新文件指针指到文件起点   
        ifstream in4(datafile);
		in4.getline(line,sizeof(line));
        		
        //type->pt=new Point[pointnum];
		type->pt = (Point*) new char[sizeof(Point) * pointnum];

		//用j来表示依次读取文件内各数据点的操作 
		int j = 0;		

		while(!in4.eof())
		{
			in4.getline(line,sizeof(line));
			sscanf(line,"%s",str);
			
       while(j < (pointnum))
		{
           
			in4.getline(line,sizeof(line));
			sscanf(line,"%s ",str);

			
			//如果是带地名的点
             if((strcmp(str,"Text")==0)||(strcmp(str,"text")==0))
			{	
				//读取点名称
		    	in4.getline(line,sizeof(line));
  				sscanf(line,"%s",str);
                //将点名称读入点类型指针数组的名字域
			    strcpy(type->pt[j].name, str);
 
				//读取各点的经纬度
               in4.getline(line,sizeof(line));
			 	sscanf(line,"%f %f",&type->pt[j].lat,&type->pt[j].lon);
				type->pt[j].hgt=0.0;
				
				j++;
		     }
            else if((strcmp(str,"Point")==0)||(strcmp(str,"point")==0))
			{			
		        //将该点名赋值为TIC点
				strcpy(type->pt[j].name, "TIC点");

				//直接读取点的经纬度
			 	sscanf(line,"%s %f %f",str,&type->pt[j].lat,&type->pt[j].lon);
				type->pt[j].hgt = 0.0;
				
				j++;
			}
	 

		}
			
	    //关闭真正的数据文件
        in4.close(); 
	  }



     }

    //关闭mif索引文件
    in2.close();
    AfxMessageBox("读取mif点文件成功!!!");
	redraw = true;

	return ;   

}

void CMIFDoc::load_ln_mapinfo(char * filename)
{
	//颜色表处理
  	unsigned int color;
	float red,green,blue,alpha,size;
	red=1.0;
	green=0.5;
	blue=0.5;
	alpha=1.0;