MFC中添加Splash Screen

1.  新建一个MFC项目SDI或MDI。

2.  新建或导入一个ID为IDB_SPLASH的位图。

3.  添加现有项SplashWnd.h和SplashWnd.cpp。

#ifndef _SPLASH_HEADER_
#define _SPLASH_HEADER_

#pragma once
//#include "afxwin.h"

// CSplashWnd

class CSplashWnd : public CWnd
{
    //DECLARE_DYNAMIC(CSplashWnd)

public:
    CSplashWnd();
    virtual ~CSplashWnd();
    virtual void PostNcDestroy();

public:
    CBitmap m_bitmap;

protected:
    static BOOL c_bShowSplashWnd;
    static CSplashWnd* c_pSplashWnd;

public:
    static void EnableSplashScreen(BOOL bEnable = TRUE);
    static void ShowSplashScreen(CWnd* pParentWnd = NULL);
    static BOOL PreTranslateAppMessage(MSG* pMsg);

protected:
    BOOL Create(CWnd* pParentWnd = NULL);
    void HideSplashScreen();

    afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
    afx_msg void OnPaint();
    afx_msg void OnTimer(UINT nIDEvent);

protected:
    DECLARE_MESSAGE_MAP()
};

#endif

// SplashWnd.cpp : 实现文件
//

#include "stdafx.h"
#include "resource.h"
#include "SplashWnd.h"


// CSplashWnd

//IMPLEMENT_DYNAMIC(CSplashWnd, CWnd)

BOOL CSplashWnd::c_bShowSplashWnd = FALSE;
CSplashWnd* CSplashWnd::c_pSplashWnd;

CSplashWnd::CSplashWnd()
{

}

CSplashWnd::~CSplashWnd()
{
    // Clear the static window pointer.
    ASSERT(c_pSplashWnd == this);
    c_pSplashWnd = NULL;
}


BEGIN_MESSAGE_MAP(CSplashWnd, CWnd)
    ON_WM_CREATE()
    ON_WM_PAINT()
    ON_WM_TIMER()
END_MESSAGE_MAP()


void CSplashWnd::EnableSplashScreen(BOOL bEnable /*= TRUE*/)
{
    c_bShowSplashWnd = bEnable;
}

void CSplashWnd::ShowSplashScreen(CWnd* pParentWnd /*= NULL*/)
{
    if (!c_bShowSplashWnd || c_pSplashWnd != NULL)
        return;
    // Allocate a new splash screen, and create the window.
    c_pSplashWnd = new CSplashWnd;
    if (!c_pSplashWnd->Create(pParentWnd))
        delete c_pSplashWnd;
    else
        c_pSplashWnd->UpdateWindow();
}

BOOL CSplashWnd::PreTranslateAppMessage(MSG* pMsg)
{
    if (c_pSplashWnd == NULL)
        return FALSE;

    // 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)
    {
        c_pSplashWnd->HideSplashScreen();
        return TRUE;    // message handled here
    }

    return FALSE;    // message not handled
}

BOOL CSplashWnd::Create(CWnd* pParentWnd /*= NULL*/)
{
    if (!m_bitmap.LoadBitmap(IDB_SPLASH))
        return FALSE;

    BITMAP bm;
    m_bitmap.GetBitmap(&bm);

    return CreateEx(0,
        AfxRegisterWndClass(0, AfxGetApp()->LoadStandardCursor(IDC_ARROW)),
        NULL, WS_POPUP | WS_VISIBLE, 0, 0, bm.bmWidth, bm.bmHeight, pParentWnd->GetSafeHwnd(), NULL);
}


void CSplashWnd::HideSplashScreen()
{
    // Destroy the window, and update the mainframe.
    DestroyWindow();
    AfxGetMainWnd()->UpdateWindow();
}

void CSplashWnd::PostNcDestroy()
{
    // Free the C++ class.
    delete this;
}

int CSplashWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CWnd::OnCreate(lpCreateStruct) == -1)
        return -1;

    // Center the window.
    CenterWindow();

    // Set a timer to destroy the splash screen.
    SetTimer(1, 1000, NULL);

    return 0;
}

void CSplashWnd::OnPaint()
{
    CPaintDC dc(this);

    CDC dcImage;
    if (!dcImage.CreateCompatibleDC(&dc))
        return;

    BITMAP bm;
    m_bitmap.GetBitmap(&bm);

    // Paint the image.
    CBitmap* pOldBitmap = dcImage.SelectObject(&m_bitmap);
    dc.BitBlt(0, 0, bm.bmWidth, bm.bmHeight, &dcImage, 0, 0, SRCCOPY);
    dcImage.SelectObject(pOldBitmap);
}

void CSplashWnd::OnTimer(UINT nIDEvent)
{
    // Destroy the splash screen window.
    HideSplashScreen();
}

4.  在App主程序实现代码中把上面的头文件包含进去，并在InitInstance函数中添加下面一段代码。 

{
　　CCommandLineInfo cmdInfo;
　　ParseCommandLine(cmdInfo);
　　CSplashWnd::EnableSplashScreen(cmdInfo.m_bShowSplash);
}

5.  最后，在主框架窗口实现代码中包含Splash头文件，在OnCreate函数return前调用CSplashWnd类的ShowSplashScreen函数即可。 

//显示Splash窗口
CSplashWnd::ShowSplashScreen(this);