serialsampledoc.cpp

GIS地理信息系统开发。大名鼎鼎的MAPX＋C++软件开发

// SerialSampleDoc.cpp : implementation of the CSerialSampleDoc class
//
/* This sample application and corresponding sample code is provided 
 * for example purposes only.  It has not undergone rigorous testing 
 * and as such should not be shipped as part of a final application 
 * without extensive testing on the part of the organization releasing 
 * the end-user product.
 */

#include "stdafx.h"
#include "SerialSample.h"

#include "SerialSampleDoc.h"
#include "IHelper.h"

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

CDaoDatabase CSerialSampleDoc::s_db;

/////////////////////////////////////////////////////////////////////////////
// CSerialSampleDoc

IMPLEMENT_DYNCREATE(CSerialSampleDoc, CDocument)

BEGIN_MESSAGE_MAP(CSerialSampleDoc, CDocument)
	//{{AFX_MSG_MAP(CSerialSampleDoc)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSerialSampleDoc construction/destruction

CSerialSampleDoc::CSerialSampleDoc()
{
	// TODO: add one-time construction code here
}

CSerialSampleDoc::~CSerialSampleDoc()
{
	if(s_db.IsOpen())
		s_db.Close();
}

/////////////////////////////////////////////////////////////////////////////
// CSerialSampleDoc serialization

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

/////////////////////////////////////////////////////////////////////////////
// CSerialSampleDoc diagnostics

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

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

/////////////////////////////////////////////////////////////////////////////
// CSerialSampleDoc commands

/*
 * Public Accessor for the Map control (for CSerialSampleView). Returns NULL
 * if it isn't valid yet.
 */
CMapX* CSerialSampleDoc::GetMap() {
	if(m_ctrlMapX.m_hWnd == NULL)
		return NULL;
	else
		return &m_ctrlMapX;
}

CSerialSampleView* CSerialSampleDoc::GetMainView() {
	POSITION pos = GetFirstViewPosition();
	CView* view = GetNextView(pos);
	if(view != NULL && view->IsKindOf(RUNTIME_CLASS(CSerialSampleView)))
		return static_cast<CSerialSampleView*>(view);
	else
		return NULL;
}

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

	CSerialSampleView* view = GetMainView();
	if(view == NULL)
		return FALSE;
	
	RECT windRect;
	
	view->GetClientRect(&windRect);
	if(!m_ctrlMapX.Create(NULL, WS_VISIBLE, windRect, view, IDC_MAP))
		return FALSE;
	
	return TRUE;
}

BOOL CSerialSampleDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
	if (!CDocument::OnOpenDocument(lpszPathName))
		return FALSE;

	CSerialSampleView* view = GetMainView();
	if(view == NULL)
		return FALSE;
	

	CFileException except;
	CFile* file = GetFile(lpszPathName, CFile::modeReadWrite | CFile::modeNoTruncate, &except);

	if(file == NULL)
		return FALSE;
	
	RECT windRect;
	view->GetClientRect(&windRect);
	
	if(!m_ctrlMapX.Create(NULL, WS_VISIBLE, windRect, view, IDC_MAP, file, TRUE)) {
		file->Close();
		return FALSE;
	}

	file->Close();
	
	IStorage* stg, *dsstg;
	try {
		stg = OpenStorage(lpszPathName);
		dsstg = OpenSubstorage(stg,"DATASETS");

		CStringList datasets;
		EnumElementNames(&datasets, dsstg);
		CDaoDatabase* curDB = GetDB();

		for(POSITION i = datasets.GetHeadPosition(); i != NULL; ) {
			COleVariant rsVt;
			const CString stgName = datasets.GetNext(i);
			CString dsName;
			dsName = ReadStream(dsstg, stgName);
			CDaoRecordset rs(curDB);
			rs.Open(dbOpenTable, dsName);

			rsVt.vt = VT_DISPATCH;
			rsVt.pdispVal = rs.m_pDAORecordset;
			rsVt.pdispVal->AddRef();

			m_ctrlMapX.GetDatasets().Restore(dsName,rsVt);
			rs.Close();
		}
	} catch(COleDispatchException* e) {
		e->ReportError();
		e->Delete();
	} catch(COleException* e) {
		e->ReportError();
		e->Delete();
	} catch(CFileException* e) {
		e->Delete();
	}

	// Executed even when an error is thrown
	CloseStorage(dsstg);
	CloseStorage(stg);

	return TRUE;
}

BOOL CSerialSampleDoc::OnSaveDocument(LPCTSTR lpszPathName) 
{
	IPersistStorage* persStg = NULL;
	IUnknown* control;
	IStorage *stg, *dsstg;
	HRESULT result;
	try {
		stg = CreateStorage(lpszPathName);
	} catch(CFileException* e) {
		e->Delete();
		return FALSE;
	}

	dsstg = CreateSubstorage(stg, "DATASETS");

	CString stgName;
	for(int i = 1; i <= m_ctrlMapX.GetDatasets().GetCount(); i++) {
		stgName.Format("%d", i);
		CreateStream(dsstg, stgName, m_ctrlMapX.GetDatasets().Item(i).GetName());
	}

	SaveStorage(dsstg);

	control = m_ctrlMapX.GetControlUnknown();
	if(control == NULL)
		return FALSE;

	control->QueryInterface(IID_IPersistStorage,(void**)&persStg);
	if(persStg == NULL) {
		CloseStorage(stg);
		return FALSE;
	}
	
	result = OleSave(persStg, stg, FALSE);

	persStg->Release();
	CloseStorage(stg);

	if(result != S_OK)
		return FALSE;
	else
		return TRUE;
}

CDaoDatabase* CSerialSampleDoc::GetDB() {
	if(!s_db.IsOpen()) {
		try {
			const CString dbPath = GetDBPath();
			s_db.Open(dbPath);
		} catch(CString s) { // couldn't find path to demographic database
			return NULL;
		}
	}
	if(s_db.IsOpen())
		return &s_db;
	else
		return NULL;
}

void CSerialSampleDoc::AddDataset(const CString tableName) {
	CDaoRecordset rs(GetDB());
	COptionalVariant optVt;
	COleVariant titleVt(tableName);
	COleVariant rsVt;
	COleVariant bindLayerVt;
	COleVariant geofieldVt;

	rs.Open(dbOpenTable, tableName);
	rsVt.vt = VT_DISPATCH;
	rsVt.pdispVal = rs.m_pDAORecordset;
	rsVt.pdispVal->AddRef();

	if(tableName == "USA") {
		bindLayerVt = "USA";
		geofieldVt = "GEOABBR";
	} else if(tableName == "US_cust") {
		bindLayerVt = "USA";
		geofieldVt = "STATE";
	} else if(tableName.Find("County") == 0) {
		bindLayerVt = "US County Boundaries";
		geofieldVt = "Cnty_fips";
	} else {
		bindLayerVt.vt = VT_ERROR;
		bindLayerVt.scode = DISP_E_PARAMNOTFOUND;
		geofieldVt.vt = VT_ERROR;
		geofieldVt.scode = DISP_E_PARAMNOTFOUND;
	}

	try {
		theApp.DoWaitCursor(1);
		if(GetMap() != NULL)
			GetMap()->GetDatasets().Add(miDataSetDAO, rsVt, titleVt, geofieldVt, optVt, bindLayerVt, optVt, optVt);
		theApp.DoWaitCursor(0);
	} catch(COleDispatchException* e) {
		e->ReportError();
		e->Delete();
	} catch(COleException* e) {
		e->ReportError();
		e->Delete();
	}
}

/*
 * Try to locate the MapStats.mdb demographic database. If it succeeds, it will return 
 * the path to the database. If it fails, it will return the empty string.
 */
const CString CSerialSampleDoc::GetDBPath() /*throw(CString)*/{
	// find the MapX path from the registry, then, search for <MapX path>\Data\MapStats.mdb
	DWORD retCode;
	HKEY key;

	CString strKey("SOFTWARE\\MapInfo\\MapX\\");
	CString strVer = m_ctrlMapX.GetVersion();
	int v1, v2, v3;
	sscanf(strVer.GetBuffer(0), "%d.%d.%d", &v1, &v2, &v3);
	strVer.Format("%d.0", v1);
	strKey = strKey + strVer;
	retCode = RegOpenKeyEx(HKEY_LOCAL_MACHINE, strKey, 0, KEY_READ, &key);
	if(retCode != ERROR_SUCCESS) {
		retCode = RegOpenKeyEx(HKEY_CURRENT_USER, strKey, 0, KEY_READ, &key);
		if(retCode != ERROR_SUCCESS) {
			CString strMsg("Could not find MapX registry key \"");
			strMsg = strMsg + strKey + "\" in either HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER";
			throw strMsg;
		}
	}

	ULONG valueLength = MAX_PATH;
	CString path;
	DWORD type;
	retCode = RegQueryValueEx(key, "ProgramDir", NULL, &type, (LPBYTE)path.GetBuffer(valueLength), &valueLength);
	path.ReleaseBuffer();

	RegCloseKey(key);

	if(retCode != ERROR_SUCCESS)
		throw CString("Found MapX in registry, but could not open subkey \"ProgramDir\"");

	if(type != REG_SZ)
		throw CString("Found MapX ProgramDir key in registry, but it is of non-string type");

	path += "\\Data\\MapStats.mdb";

	if(!FileExists(path)) {
		CString msg;
		msg.Format("Could not find demographic database \"%s\"", path);
		throw msg;
	}
	return path;
}

bool CSerialSampleDoc::FileExists(const CString path) {
	CFileStatus fileStat;

	return CFile::GetStatus(path, fileStat) != 0;
}