GDI+制作基于CWnd的Splash类源码

/////////////////////////////////////////////////////////////////////////////// //Written by Liu Zhengxi //May 5,2003 //Compiles with Visual C++ 6.0 for Windows 98 and probably Windows 2000 // too. ///////////////////////////////////////////////////////////////////////////// // // Splash.cpp : implementation file // #include <atlbase.h> #include <afxwin.h> #include <afxpriv2.h> #include "stdafx.h" // e. g. stdafx.h #include "Splash.h" // e.g. splash.h #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char BASED_CODE THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CSplashWnd class //////////////////////////////////////////////////////////////////////////// //constructor //Load image from the given file // CSplashWnd::CSplashWnd(LPCTSTR lpszFileName) { fileIsValid = pic.Load(lpszFileName); if(fileIsValid) { CSize cz = pic.GetImageSize(NULL); width = cz.cx; height = cz.cy; } } //////////////////////////////////////////////////////////////////////////////// //nothing to do //deconstructor // CSplashWnd::~CSplashWnd() { } //////////////////////////////////////////////////////////////////////////////// //message map // BEGIN_MESSAGE_MAP(CSplashWnd, CWnd) //{{AFX_MSG_MAP(CSplashWnd) ON_WM_CREATE() ON_WM_PAINT() ON_WM_TIMER() //}}AFX_MSG_MAP END_MESSAGE_MAP() //////////////////////////////////////////////////////////////////////////////// //ShowSplash //to display the given image on screen // BOOL CSplashWnd::ShowSplash() { if(fileIsValid) { if (!Create(AfxGetMainWnd())) return false; else { UpdateWindow(); return true; } } else { return false; } } //////////////////////////////////////////////////////////////////////////////// //PreTranslateAppMessage // BOOL CSplashWnd::PreTranslateAppMessage(MSG* pMsg) { // If we get a keyboard or mouse message, hide the splash screen. if (pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN || pMsg->message == WM_LBUTTONDOWN || pMsg->message == WM_RBUTTONDOWN || pMsg->message == WM_MBUTTONDOWN || pMsg->message == WM_NCLBUTTONDOWN || pMsg->message == WM_NCRBUTTONDOWN || pMsg->message == WM_NCMBUTTONDOWN) { CloseSplash(); return TRUE; // message handled here } return FALSE; // message not handled } //////////////////////////////////////////////////////////////////////////////// //Create //make a popup splash window // BOOL CSplashWnd::Create(CWnd* pParentWnd /*= NULL*/) { return CreateEx(0, AfxRegisterWndClass(0, AfxGetApp()->LoadStandardCursor(IDC_ARROW)), NULL, WS_POPUP | WS_VISIBLE, 0, 0, width, height, pParentWnd->GetSafeHwnd(), NULL); } //////////////////////////////////////////////////////////////////////////////// //CloseSplash //Quit the splash window // void CSplashWnd::CloseSplash() { // Destroy the window, and update the mainframe. DestroyWindow(); } //////////////////////////////////////////////////////////////////////////////// //do nothing // void CSplashWnd::PostNcDestroy() { } //////////////////////////////////////////////////////////////////////////////// //OnCreate //put the splash window on center // int CSplashWnd::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CWnd::OnCreate(lpCreateStruct) == -1) return -1; // Center the window. CenterWindow(); return 0; } //////////////////////////////////////////////////////////////////////////////// //OnPaint //Display the given image // void CSplashWnd::OnPaint() { if(fileIsValid) { CPaintDC dc(this); CRect rc(0,0,0,0);; pic.Render(&dc, rc); } } //////////////////////////////////////////////////////////////////////////////// //ShowText //sometimes if we show what we are doing (I display the information on the center of //the picture ), the customer will be more patient // // void CSplashWnd::ShowText(LPCTSTR lpStr) { if(fileIsValid) { Invalidate(); CPaintDC dc(this); dc.SetBkMode(TRANSPARENT); SIZE sz; sz = (SIZE)dc.GetTextExtent(lpStr,strlen(lpStr)); dc.TextOut((width-sz.cx)/2,height/2,lpStr); } } //////////////////////////////////////////////////////////////// // MSDN Magazine - October 2001 // If this code works, it was written by Paul DiLascia. // If not, I don't know who wrote it. // Compiles with Visual C++ 6.0 for Windows 98 and probably Windows 2000 // too. // Set tabsize = 3 in your editor. // //////////////////////////////////////////////////////////////// // CPicture implementation // CPicture::CPicture() { } CPicture::~CPicture() { } ////////////////// // Load from resource. Looks for "IMAGE" type. // BOOL CPicture::Load(UINT nIDRes) { // find resource in resource file HINSTANCE hInst = AfxGetResourceHandle(); HRSRC hRsrc = ::FindResource(hInst, MAKEINTRESOURCE(nIDRes), "IMAGE"); // type if (!hRsrc) return FALSE; // load resource into memory DWORD len = SizeofResource(hInst, hRsrc); BYTE* lpRsrc = (BYTE*)LoadResource(hInst, hRsrc); if (!lpRsrc) return FALSE; // create memory file and load it CMemFile file(lpRsrc, len); BOOL bRet = Load(file); FreeResource(hRsrc); return bRet; } ////////////////// // Load from path name. // BOOL CPicture::Load(LPCTSTR pszPathName) { CFile file; if (!file.Open(pszPathName, CFile::modeRead|CFile::shareDenyWrite)) return FALSE; BOOL bRet = Load(file); file.Close(); return bRet; } ////////////////// // Load from CFile // BOOL CPicture::Load(CFile& file) { CArchive ar(&file, CArchive::load | CArchive::bNoFlushOnDelete); return Load(ar); } ////////////////// // Load from archive-create stream and load from stream. // BOOL CPicture::Load(CArchive& ar) { CArchiveStream arcstream(&ar); return Load((IStream*)&arcstream); } ////////////////// // Load from stream (IStream). This is the one that really does it: call // OleLoadPicture to do the work. // BOOL CPicture::Load(IStream* pstm) { Free(); HRESULT hr = OleLoadPicture(pstm, 0, FALSE, IID_IPicture, (void**)&m_spIPicture); ASSERT(SUCCEEDED(hr) && m_spIPicture); return TRUE; } ////////////////// // Get image size in pixels. Converts from HIMETRIC to device coords. // CSize CPicture::GetImageSize(CDC* pDC) const { if (!m_spIPicture) return CSize(0,0); LONG hmWidth, hmHeight; // HIMETRIC units m_spIPicture->get_Width(&hmWidth); m_spIPicture->get_Height(&hmHeight); CSize sz(hmWidth,hmHeight); if (pDC==NULL) { CWindowDC dc(NULL); dc.HIMETRICtoDP(&sz); // convert to pixels } else { pDC->HIMETRICtoDP(&sz); } return sz; } ////////////////// // Render to device context. Covert to HIMETRIC for IPicture. // BOOL CPicture::Render(CDC* pDC, CRect rc, LPCRECT prcMFBounds) const { ASSERT(pDC); if (rc.IsRectNull()) { CSize sz = GetImageSize(pDC); rc.right = sz.cx; rc.bottom = sz.cy; } long hmWidth,hmHeight; // HIMETRIC units GetHIMETRICSize(hmWidth, hmHeight); m_spIPicture->Render(*pDC, rc.left, rc.top, rc.Width(), rc.Height(), 0, hmHeight, hmWidth, -hmHeight, prcMFBounds); return TRUE; }