BmpFieldDlg.cpp
上传用户:lqt88888
上传日期:2009-12-14
资源大小:905k
文件大小:6k
- // BmpFieldDlg.cpp : implementation file
- //
- #include "stdafx.h"
- #include "BmpField.h"
- #include "BmpFieldDlg.h"
- #include "ImageData.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()
- /////////////////////////////////////////////////////////////////////////////
- // CBmpFieldDlg dialog
- CBmpFieldDlg::CBmpFieldDlg(CWnd* pParent /*=NULL*/)
- : CDialog(CBmpFieldDlg::IDD, pParent)
- {
- //{{AFX_DATA_INIT(CBmpFieldDlg)
- // 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 CBmpFieldDlg::DoDataExchange(CDataExchange* pDX)
- {
- CDialog::DoDataExchange(pDX);
- //{{AFX_DATA_MAP(CBmpFieldDlg)
- // NOTE: the ClassWizard will add DDX and DDV calls here
- //}}AFX_DATA_MAP
- }
- BEGIN_MESSAGE_MAP(CBmpFieldDlg, CDialog)
- //{{AFX_MSG_MAP(CBmpFieldDlg)
- ON_WM_SYSCOMMAND()
- ON_WM_PAINT()
- ON_WM_QUERYDRAGICON()
- ON_BN_CLICKED(IDC_LOADIMAG, OnLoadimag)
- //}}AFX_MSG_MAP
- END_MESSAGE_MAP()
- /////////////////////////////////////////////////////////////////////////////
- // CBmpFieldDlg message handlers
- BOOL CBmpFieldDlg::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 CBmpFieldDlg::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.
- //显示位图
- void CBmpFieldDlg::OnPaint()
- {
- //获得DC
- CPaintDC dc(this);
- if (!(OleBmp.m_hObject == NULL))
- {
- //创建内存设备场景
- CDC dcMem;
- dcMem.CreateCompatibleDC( &dc );
- CBitmap* pbmpOld ;
-
- BITMAP BmpSize ;
- OleBmp.GetBitmap(&BmpSize); //get Image Size
-
- pbmpOld = dcMem.SelectObject(&OleBmp);
- //显示位图
- 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 CBmpFieldDlg::OnQueryDragIcon()
- {
- return (HCURSOR) m_hIcon;
- }
- //读位图数据,并创建位图
- BOOL CBmpFieldDlg::ReadFromBLOB(CByteArray & DBArray)
- {
- CByteArray Array;
- Array.Copy( DBArray);
-
- //获得位图文件头信息长度
- int HeaderLen = 78 + sizeof(BITMAPFILEHEADER);
- Array.RemoveAt( 0, HeaderLen ); // I cut all Headers
-
- //获得位图信息
- BITMAPINFOHEADER &bmiHeader = *(LPBITMAPINFOHEADER)
- Array.GetData() ;
- BITMAPINFO &bmInfo = *(LPBITMAPINFO)Array.GetData() ;
-
- //获得位图颜色数
- int nColors = bmiHeader.biClrUsed ?
- bmiHeader.biClrUsed : 1 << bmiHeader.biBitCount;
- //获得位图数据
- 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);
- //创建位图
- HBITMAP hBmp = CreateDIBitmap( dc.m_hDC,
- &bmiHeader,
- CBM_INIT,
- lpDIBBits,
- &bmInfo,
- DIB_RGB_COLORS);
-
- OleBmp.Attach( hBmp );
- //清除临时数组
- Array.RemoveAll();
- return TRUE;
- }
- //获得位图数据
- void CBmpFieldDlg::OnLoadimag()
- {
- //打开数据库
- CImageData db;
- db.Open();
- ReadFromBLOB(db.m_Images);
- //显示位图
- Invalidate();
- //关闭数据库
- db.Close();
- }