appapi.cpp

程序编写环境为Visual Studio.NET 2002

#include "stdafx.h"
#include "AppApi.h"
#include "MoStrings.h"
#include "MoRecordset.h"
#include "MoFields.h"
#include "MoField.h"
#include "MoValueMapRenderer.h"
#include "MoSymbol.h"
#include "gissegline.h"
//-----------------------------------------------------------------------------------------
// 得到某个文件名的路径
CString GetFilePath(const CString& strFileName)
{
	ASSERT(strFileName.GetLength());
	int pos = strFileName.ReverseFind('\\');
	if (pos >= 0)
		return strFileName.Left(pos);
	return "";
}
//-----------------------------------------------------------------------------------------
// 得到应用程序的路径名
CString GetModulePath()
{
	char lpFilename[200];
	DWORD nSize = 200;
	// 得到应用程序的文件名
	GetModuleFileName(NULL, lpFilename, nSize);
	return GetFilePath(CString(lpFilename));
}
//-----------------------------------------------------------------------------------------
// 显示DAO异常的信息
void DisplayDaoException(CDaoException* e)
{
	CString strMsg;
	if (e->m_pErrorInfo != NULL)
	{
		strMsg.Format(
			_T("%s   (%d)\n\n")
			_T("Would you like to see help?"),
			(LPCTSTR)e->m_pErrorInfo->m_strDescription,
			e->m_pErrorInfo->m_lErrorCode);

		// 显示错误信息
		if (AfxMessageBox(strMsg, MB_YESNO) == IDYES)
		{
			WinHelp(GetDesktopWindow(),
					e->m_pErrorInfo->m_strHelpFile,
					HELP_CONTEXT,
					e->m_pErrorInfo->m_lHelpContext);
		}
	}
	else
	{
		strMsg.Format(
			_T("ERROR:CDaoException\n\n")
			_T("SCODE_CODE      =%d\n")
			_T("SCODE_FACILITY  =%d\n")
			_T("SCODE_SEVERITY  =%d\n")
			_T("ResultFromScode =%d\n"),
			SCODE_CODE      (e->m_scode),
			SCODE_FACILITY  (e->m_scode),
			SCODE_SEVERITY  (e->m_scode),
			ResultFromScode (e->m_scode));
		// 显示错误信息
		AfxMessageBox(strMsg);
	}
}
//-----------------------------------------------------------------------------------------
// 设置多边形图层的颜色
void SetPolygonLayerColor(CMoMapLayer ly, CString szField1, 
						  CString szField2, bool bBorder)
{
	CMoStrings strings;
	strings.CreateDispatch(TEXT("MapObjects2.Strings"));
	CMoStrings strColors;
	strColors.CreateDispatch(TEXT("MapObjects2.Strings"));
	CMoRecordset rst = ly.GetRecords();
	
	rst.MoveFirst(); 
	while (!rst.GetEof())
	{
		CString strValue = rst.GetFields().Item(COleVariant
			                (TEXT(szField1))).GetValueAsString();
		strings.Add(strValue); 
		strValue = rst.GetFields().Item(COleVariant
			                (TEXT(szField2))).GetValueAsString();
		strColors.Add(strValue);  
		
		rst.MoveNext(); 
	}
    
	CMoValueMapRenderer rd;
	rd.CreateDispatch(TEXT("MapObjects2.ValueMapRenderer"));
	ly.SetRenderer(rd);
	rd.SetField(szField1);
	rd.SetValueCount(strings.GetCount());
    
	for (short i = 0; i < strings.GetCount(); i ++)
	{
		rd.SetValue((short)i, strings.Item(COleVariant(i)));   				
		CMoSymbol sym = rd.GetSymbol((short)i);
		
		UINT nColor = atoi(strColors.Item(COleVariant(i)));
		// 设置符号的颜色
		sym.SetColor(nColor);
		// 设置符号的外框
		sym.SetOutline(bBorder);
	}
}
//-----------------------------------------------------------------------------------------
BOOL IsWithin(CMoRectangle rect, CMoPoint pt)
{
	BOOL bWithin = FALSE;
	bWithin = rect.IsPointIn(pt);
	return bWithin;
}
//-----------------------------------------------------------------------------------------
void CutLine(MLine LineSrc,MPoint pt1,MPoint pt2, MLine* LineRes)
{
	// 计算到线段的距离
	double dMinDistance1 = 10000.0;
	double dMinDistance2 = 10000.0;
	double dTheDis = 0.0;
	MPoint ptRealFrom, ptRealTo;
	MPoint ptTemp;
	int nPointOrderInMLine1 = 0, nPointOrderInMLine2 = 0;
	CGisSegLine SegMLine;
	for(int i=0; i<LineSrc.nPointNumber-1; i++)
	{
		SegMLine.m_ptStartPoint.x = LineSrc.pPoint[i].x;
		SegMLine.m_ptStartPoint.y = LineSrc.pPoint[i].y;
		SegMLine.m_ptStartPoint.x = LineSrc.pPoint[i+1].x;
		SegMLine.m_ptStartPoint.y = LineSrc.pPoint[i+1].y;
				
		SegMLine.GetDistance(&pt1, &ptTemp, &dTheDis);
		if(dTheDis < dMinDistance1)
		{
			dMinDistance1 = dTheDis;
			nPointOrderInMLine1 = i;
			ptRealFrom = ptTemp;
		}

		SegMLine.GetDistance(&pt2, &ptTemp, &dTheDis);
		if(dTheDis < dMinDistance2)
		{
			dMinDistance2 = dTheDis;
			nPointOrderInMLine2 = i;
			ptRealTo = ptTemp;
		}
	}
	if(nPointOrderInMLine2 - nPointOrderInMLine1 >0 )
	{
		LineRes->nPointNumber = nPointOrderInMLine2 - nPointOrderInMLine1 +2;
		LineRes->pPoint = new MPoint[LineRes->nPointNumber];
		int i;
		LineRes->pPoint[0] = pt1;
		for(i=1; i<LineRes->nPointNumber-1; i++)
		{
			LineRes->pPoint[i] = LineSrc.pPoint[nPointOrderInMLine1+i];
		}
		LineRes->pPoint[i] = pt2;
	}
	else
	{
		LineRes->nPointNumber = nPointOrderInMLine1 - nPointOrderInMLine2 +2;
		LineRes->pPoint = new MPoint[LineRes->nPointNumber];
		int i;
		LineRes->pPoint[0] = pt2;
		for(i=1; i<LineRes->nPointNumber-1; i++)
		{
			LineRes->pPoint[i] = LineSrc.pPoint[nPointOrderInMLine2+i];
		}
		LineRes->pPoint[i] = pt1;
	}
}
//-----------------------------------------------------------------------------------------