www.pudn.com > storing_paintbrush_in_accessdb34243.zip > BLOBSDlg.cpp

// BLOBSDlg.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "BLOBS.h" 
#include "BLOBSDlg.h" 
#include "RSOle.h" 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CAboutDlg dialog used for App About 
 
class CAboutDlg : public CDialog 
{ 
public: 
	CAboutDlg(); 
 
// Dialog Data 
	//{{AFX_DATA(CAboutDlg) 
	enum { IDD = IDD_ABOUTBOX }; 
	//}}AFX_DATA 
 
	// ClassWizard generated virtual function overrides 
	//{{AFX_VIRTUAL(CAboutDlg) 
	protected: 
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support 
	//}}AFX_VIRTUAL 
 
// Implementation 
protected: 
	//{{AFX_MSG(CAboutDlg) 
	//}}AFX_MSG 
	DECLARE_MESSAGE_MAP() 
}; 
 
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) 
{ 
	//{{AFX_DATA_INIT(CAboutDlg) 
	//}}AFX_DATA_INIT 
} 
 
void CAboutDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CAboutDlg) 
	//}}AFX_DATA_MAP 
} 
 
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 
	//{{AFX_MSG_MAP(CAboutDlg) 
		// No message handlers 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CBLOBSDlg dialog 
 
CBLOBSDlg::CBLOBSDlg(CWnd* pParent /*=NULL*/) 
	: CDialog(CBLOBSDlg::IDD, pParent) 
{ 
	//{{AFX_DATA_INIT(CBLOBSDlg) 
		// NOTE: the ClassWizard will add member initialization here 
	//}}AFX_DATA_INIT 
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32 
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 
} 
 
void CBLOBSDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CBLOBSDlg) 
		// NOTE: the ClassWizard will add DDX and DDV calls here 
	//}}AFX_DATA_MAP 
} 
 
BEGIN_MESSAGE_MAP(CBLOBSDlg, CDialog) 
	//{{AFX_MSG_MAP(CBLOBSDlg) 
	ON_WM_SYSCOMMAND() 
	ON_WM_PAINT() 
	ON_WM_QUERYDRAGICON() 
	ON_BN_CLICKED(IDC_LOADIMAGE, OnLoadImage) 
	ON_BN_CLICKED(IDC_ABOUT, OnAbout) 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CBLOBSDlg message handlers 
 
BOOL CBLOBSDlg::OnInitDialog() 
{ 
	CDialog::OnInitDialog(); 
 
	// Add "About..." menu item to system menu. 
 
	// IDM_ABOUTBOX must be in the system command range. 
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); 
	ASSERT(IDM_ABOUTBOX < 0xF000); 
 
	CMenu* pSysMenu = GetSystemMenu(FALSE); 
	if (pSysMenu != NULL) 
	{ 
		CString strAboutMenu; 
		strAboutMenu.LoadString(IDS_ABOUTBOX); 
		if (!strAboutMenu.IsEmpty()) 
		{ 
			pSysMenu->AppendMenu(MF_SEPARATOR); 
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); 
		} 
	} 
 
	// Set the icon for this dialog.  The framework does this automatically 
	//  when the application's main window is not a dialog 
	SetIcon(m_hIcon, TRUE);			// Set big icon 
	SetIcon(m_hIcon, FALSE);		// Set small icon 
	 
	// TODO: Add extra initialization here 
	 
	return TRUE;  // return TRUE  unless you set the focus to a control 
} 
 
void CBLOBSDlg::OnSysCommand(UINT nID, LPARAM lParam) 
{ 
	if ((nID & 0xFFF0) == IDM_ABOUTBOX) 
	{ 
		CAboutDlg dlgAbout; 
		dlgAbout.DoModal(); 
	} 
	else 
	{ 
		CDialog::OnSysCommand(nID, lParam); 
	} 
} 
 
// If you add a minimize button to your dialog, you will need the code below 
//  to draw the icon.  For MFC applications using the document/view model, 
//  this is automatically done for you by the framework. 
 
void CBLOBSDlg::OnPaint()  
{ 
	CPaintDC dc(this); 
	if (!(OleBmp.m_hObject == NULL)) 
	{ 
 
		CDC dcMem;  
		dcMem.CreateCompatibleDC( &dc ); //create a Memory Image 
		CBitmap*  pbmpOld ; 
		 
		BITMAP  BmpSize ;  
		OleBmp.GetBitmap(&BmpSize); //get Image Size 
		 
		pbmpOld = dcMem.SelectObject(&OleBmp); 
 
		//Draw Stretch Image  
		dc.StretchBlt( 5, 5, 150, 200, &dcMem, 0, 0, BmpSize.bmWidth, BmpSize.bmHeight, SRCCOPY); 
		dcMem.SelectObject( pbmpOld ); 
	} 
} 
 
// The system calls this to obtain the cursor to display while the user drags 
//  the minimized window. 
HCURSOR CBLOBSDlg::OnQueryDragIcon() 
{ 
	return (HCURSOR) m_hIcon; 
} 
 
BOOL CBLOBSDlg::ReadFromBLOB(CByteArray & DBArray) 
{ 
	CByteArray Array; 
	Array.Copy( DBArray);  
	// the header of BLOB is OLE stuff like "Paint Brush Application" .... ecc.. 
	// the len is 78 byte ( I do not know for other headers )  
	int HeaderLen =   78 + sizeof(BITMAPFILEHEADER);  
	Array.RemoveAt( 0, HeaderLen ); // I cut all Headers  
     
	// some BMP information   
	BITMAPINFOHEADER &bmiHeader = *(LPBITMAPINFOHEADER)Array.GetData() ; 
    BITMAPINFO &bmInfo = *(LPBITMAPINFO)Array.GetData() ; 
	 
	 
     // If bmiHeader.biClrUsed is zero we have to infer the number 
     // of colors from the number of bits used to specify it. 
     int nColors = bmiHeader.biClrUsed ? bmiHeader.biClrUsed : 1 << bmiHeader.biBitCount; 
 
     LPVOID lpDIBBits; 
     if( bmInfo.bmiHeader.biBitCount > 8 ) 
        lpDIBBits = (LPVOID)((LPDWORD)(bmInfo.bmiColors + bmInfo.bmiHeader.biClrUsed) +  
                        ((bmInfo.bmiHeader.biCompression == BI_BITFIELDS) ? 3 : 0)); 
     else 
        lpDIBBits = (LPVOID)(bmInfo.bmiColors + nColors); 
 
 
     CClientDC dc(NULL); 
     
	 HBITMAP hBmp = CreateDIBitmap( dc.m_hDC,   // handle to device context  
			                    &bmiHeader,     // pointer to bitmap size and format data  
                                CBM_INIT,       // initialization flag  
                                lpDIBBits,      // pointer to initialization data  
                                &bmInfo,        // pointer to bitmap color-format data  
                                DIB_RGB_COLORS);                // color-data usage  
      
	OleBmp.Attach( hBmp ); 
 
	Array.RemoveAll(); //Relese Memory 
 
	return TRUE; 
 
} 
 
void CBLOBSDlg::OnLoadImage()  
{ 
	 
	RSOle db; 
	db.Open(); 
	//db.MoveNext(); // if you want try to load the  next image 
	ReadFromBLOB(db.m_Images); 
	Invalidate();   
	 
} 
 
void CBLOBSDlg::OnAbout()  
{ 
CAboutDlg About; 
About.DoModal();	 
}