【轉】vs2010中添加splashScreen

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作者資訊：羅樹鵬  http://www.cnblogs.com/luoshupeng

由於筆者在實踐過程中走了一些彎路，所以把這些情況記錄下來，希望為後來者提供一些經驗。

在VC6.0時代，可以通過組件為工程加入SplashScreen，具體方法是通過IDE中的菜單Project->Add to Project->Componentsand Controls，就可以從Visual C++ Components中選擇Splash Screen這個組件插入工程。

但進入到VC. NET時代，這種方法就不行了，需要程式作者自己加入SplashScreen類，自己處理一些系統訊息。下面筆者就把實踐過程記錄下來，並指出需要注意的地方。

一、            建立一個SplashScreen類，並聲明成員和方法

建立基類為CWnd的CSplashWnd類（當然類名可以自由書寫），並聲明如下成員：

CBitmap m_bitmap;                                              //載入SplashScreen圖片用

static CSplashWnd*c_pSplashWnd;        //CSplashWnd類的控制代碼，可以用來判定CSplashWnd是否已經建立或消毀

static BOOLc_bShowSplashWnd;             //標識是否顯示顯示用來，靜態成員需要在類外進行初始化

類成員一般聲明為保護類型(protected)。接下來聲明幾個靜態方法來處理這些成員：

static BOOLc_bShowSplashWnd;             //標識是否顯示顯示用來，靜態成員需要在類外進行初始化

static void ShowSplashScreen(CWnd* pParentWnd = NULL); //用來顯示SplashScreen視窗

 static BOOLPreTranslateAppMessage(MSG* pMsg);                       //用來處理一些訊息  注意這裡不是繼承於CWnd類的PreTranslateMessage方法

這些方法一定要聲明成公開類型的(public)，因為要在外部調用這些方法。接下來再聲明兩個自訂方法：

BOOL Create(CWnd*pParentWnd = NULL);           //建立視窗

void HideSplashScreen(void);                              //隱藏視窗

我把這些方法聲明為保護類型(protected)。接下來再聲明一些處理系統訊息的函數：

virtual void PostNcDestroy();

afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);

afx_msg void OnTimer(UINT_PTR nIDEvent);

afx_msg void OnPaint();

至此，類已經設計完畢。完整的標頭檔如下：

#pragma once

#include "afxwin.h"

 

 

//CSplashWnd

 

class CSplashWnd : public CWnd

{

         DECLARE_DYNAMIC(CSplashWnd)

 

protected:

         CSplashWnd();

public:

         virtual~CSplashWnd();

 

protected:

         CBitmap m_bitmap;                                              //載入SplashScreen圖片用

         staticCSplashWnd* c_pSplashWnd;        //CSplashWnd類的控制代碼，可以用來判定CSplashWnd是否已經建立或消毀

         staticBOOL c_bShowSplashWnd;             //標識是否顯示顯示用來，靜態成員需要在類外進行初始化

public:

         static void EnableSplashScreen(BOOL bEnable = TRUE);        //用來設定c_bShowSplashWnd

         static void ShowSplashScreen(CWnd* pParentWnd = NULL); //用來顯示SplashScreen視窗

         staticBOOL PreTranslateAppMessage(MSG* pMsg);                         //用來處理一些訊息  注意這裡不是繼承於CWnd類的PreTranslateMessage方法

protected:

         virtualvoid PostNcDestroy();

         afx_msg intOnCreate(LPCREATESTRUCT lpCreateStruct);

         afx_msg voidOnTimer(UINT_PTR nIDEvent);

         afx_msg voidOnPaint();

         BOOL Create(CWnd* pParentWnd = NULL);           //建立視窗

         voidHideSplashScreen(void);                              //隱藏視窗

 

         DECLARE_MESSAGE_MAP()

};

二、            CSplashWnd類方法的實現

這裡需要注意的事項是在解構函式中一定要把c_pSplashWnd成員置為NULL類型，否則程式收到訊息後會出現異常。其它沒有什麼了，直接看代碼吧。

//Splash.cpp : implementation file

//

 

#include "stdafx.h"

#include "Splash.h"

 

 

CSplashWnd*CSplashWnd::c_pSplashWnd;

BOOLCSplashWnd::c_bShowSplashWnd;

//CSplashWnd

 

IMPLEMENT_DYNAMIC(CSplashWnd,CWnd)

 

CSplashWnd::CSplashWnd()

{

 

}

 

CSplashWnd::~CSplashWnd()

{

         ASSERT(c_pSplashWnd == this);

         c_pSplashWnd = NULL;

}

 

 

BEGIN_MESSAGE_MAP(CSplashWnd,CWnd)

         ON_WM_CREATE()

         ON_WM_TIMER()

         ON_WM_PAINT()

END_MESSAGE_MAP()

 

 

 

//CSplashWnd message handlers

 

 

 

 

voidCSplashWnd::EnableSplashScreen(BOOL bEnable/* =TRUE*/)

{

         c_bShowSplashWnd = bEnable;

}

 

 

voidCSplashWnd::ShowSplashScreen(CWnd* pParentWnd/* =NULL*/)

{

         //如果不要顯示SplashScreen或SplashWnd對象已經被建立則返回

         if (!c_bShowSplashWnd || c_pSplashWnd!=NULL)

         {

                   return;

         }

 

         c_pSplashWnd = newCSplashWnd;

 

         if ( !c_pSplashWnd->Create(pParentWnd))

         {

                   deletec_pSplashWnd;

         }

         else

         {

                   c_pSplashWnd->UpdateWindow();

         }

}

 

 

BOOLCSplashWnd::PreTranslateAppMessage(MSG* pMsg)

{

         if(c_pSplashWnd == NULL)

                   returnFALSE;

 

         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();

                   returnTRUE;

         }

 

         returnFALSE;

}

 

 

void CSplashWnd::PostNcDestroy()

{

         delete this;

}

 

 

intCSplashWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)

{

         if(CWnd::OnCreate(lpCreateStruct) == -1)

                   return-1;

 

         // TODO:  Add your specialized creation code here

         CenterWindow();

 

         SetTimer(1,3000,NULL);

 

         return0;

}

 

 

voidCSplashWnd::OnTimer(UINT_PTR nIDEvent)

{

         // TODO: Addyour message handler code here and/or call default

         if(nIDEvent == 1)

         {

                   HideSplashScreen();

         }

 

         /*CWnd::OnTimer(nIDEvent);*/

}

 

 

voidCSplashWnd::OnPaint()

{

         CPaintDC dc(this);// device context for painting

         // TODO: Addyour message handler code here

         // Do notcall CWnd::OnPaint() for painting messages

         CDC dcImg;

         if ( !dcImg.CreateCompatibleDC(&dc))

         {

                   return;

         }

 

         BITMAP bm;

         m_bitmap.GetBitmap(&bm);

         // paint theimage

         CBitmap* pOldBit =dcImg.SelectObject(&m_bitmap);

         dc.BitBlt(0,0,bm.bmWidth,bm.bmHeight,&dcImg,0,0,SRCCOPY);

         dcImg.SelectObject(pOldBit);

}

 

 

BOOLCSplashWnd::Create(CWnd* pParentWnd)

{

         if ( !m_bitmap.LoadBitmap(IDB_SPLASH))

         {

                   returnFALSE;

         }

 

         BITMAP bm;

         m_bitmap.GetBitmap(&bm);

 

         returnCreateEx(0,

                   AfxRegisterWndClass(0,AfxGetApp()->LoadStandardCursor(IDC_ARROW)),

                   NULL,

                   WS_POPUP|WS_VISIBLE,

                   0,

                   0,

                   bm.bmWidth,

                   bm.bmHeight,

                   pParentWnd->GetSafeHwnd(),

                   NULL);

}

 

 

void CSplashWnd::HideSplashScreen(void)

{

         DestroyWindow();

         AfxGetMainWnd()->UpdateWindow();

}

三、            在SDI或者MDI中使用CSplashWnd類

(1)  在CWinApp::InitInstance()中調用CSplashWnd::EnableSplashScreen()設定c_bShowSplashWnd；
在PreTranslateMessage()中調用CSplashWnd::PreTranslateAppMessage()，將鍵盤和滑鼠訊息傳遞給CSplashWnd對象

(2)  (2)在CMainFrame對象的OnCreate()中調用CSplashWnd::ShowSplashScreen()建立一個靜態SplashScreen視窗對象c_pSplashWnd，並設定其父視窗為CMainFrame.

代碼如下：

BOOLCDrawApp::InitInstance()

{

         //用來處理是否顯示SplashScreen

         {

                   CCommandLineInfo cmdinfo;

                   ProcessShellCommand(cmdinfo);

 

                   CSplashWnd::EnableSplashScreen(cmdinfo.m_bShowSplash);

         }

………..

}

BOOLCDrawApp::PreTranslateMessage(MSG* pMsg)

{

         if(CSplashWnd::PreTranslateAppMessage(pMsg))

                   returnTRUE;

 

         returnCWinAppEx::PreTranslateMessage(pMsg);

}

 

intCMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)

{

         if(CMDIFrameWndEx::OnCreate(lpCreateStruct) == -1)

                   return-1;

         ………..

         CSplashWnd::ShowSplashScreen(this);

         return0;

}

在此過程中不會出現什麼錯誤，但編譯時間會提示：IDB_SPLASH沒有定義。這需要在資源中加入個位元影像資源，並將”resource.h” 標頭檔包含到CSlashWnd.cpp檔案中。

四、            在對話方塊中使用CSplashWnd類

在對話方塊中使用和在SDI或MDI中使用基本相似，首先在CWinApp的繼承類中處理InitInstance()和PreTranslateMessage(MSG* pMsg)兩個訊息函數，然後在對話方塊類的WM_CREATE響應函數中顯示SplashScreen。

BOOLCDLGApp::InitInstance()

{

         //用來處理是否顯示SplashScreen

         {

                   CCommandLineInfo cmdinfo;

                   ProcessShellCommand(cmdinfo);

 

                   CSplashWnd::EnableSplashScreen(cmdinfo.m_bShowSplash);

         }

……….

}

BOOLCDLGApp::PreTranslateMessage(MSG* pMsg)

{

         if (CSplashWnd::PreTranslateAppMessage(pMsg) )

         {

                   returnTRUE;

         }

 

         returnCWinApp::PreTranslateMessage(pMsg);

}

 

intCDLGDlg::OnCreate(LPCREATESTRUCT lpCreateStruct)

{

         if(CDialogEx::OnCreate(lpCreateStruct) == -1)

                   return-1;

 

         // TODO:  Add your specialized creation code here

         CSplashWnd::ShowSplashScreen(this);

 

         return0;

}

【轉】vs2010中添加splashScreen