VS2008中添加程序启动画面 splash screen

 

在VC6.0中，可以通过添加Splash组件，然后在工程调用组件中提供的函数，就可以实现。但是在VS2008中却没有这样的组件（我自己找了好久，没找到，网上查阅也没有相关资料）。在查阅了相关资料后总结如下 ：

1、需要自己添加一个专门的类C SplashWnd。

代码如下：

//SplashWnd.h 
#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 
// 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 )
{
c_bShowSplashWnd = bEnable;
}

void CSplashWnd::ShowSplashScreen(CWnd* pParentWnd )
{
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 )
{
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();
} 


 

2、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);

【注意】CCommandLineInfo cmdInfo;ParseCommandLine(cmdInfo);这两句代码已经在InitInstance函数中存在，只需将最后一句代码加上即可。

3、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)

4、按照上面的顺序不能完成此功能，原因如下：

08中MFC中的InitInstance函数， 默认的代码大致是：

// 创建主 MDI 框架窗口

CMainFrame* pMainFrame = new CMainFrame;

if (!pMainFrame || !pMainFrame->LoadFrame(IDR_MAINFRAME))

{

delete pMainFrame;

return FALSE;

}

m_pMainWnd = pMainFrame;

// 分析标准外壳命令、DDE、打开文件操作的命令行

CCommandLineInfo cmdInfo;

ParseCommandLine(cmdInfo);

即默认是先建立框架，再解析命令行。也就是限执行MainFrame里面的 OnCreate函数里面中的3，再执行2。在里面跟踪一下，就会发现，这样就无法满足执行条件而无法完成功能。

5、这里面的图片是需要先将文件中的图片导入资源中，【提醒】只能导入BMP图像，如果不是，可以先用Photoshop处理下。【特别提醒】导入的BMP的大小要有限制，Photoshop里面也有调节图像大小功能，

一般像素宽度和高度大于700多（经验值，具体可以自己实验下），调用系统函数加载图像时，就会失败。

m_bitmap.LoadBitmap(IDB_SPLASH)

转载于：http://my.oschina.net/tjguo/blog/12742