Animated Background Banner

The following code is used to display an Animated Banner using the the CmdiMainClient class. You will need to get a set of sequenced bitmaps to show the animation. In my example you can Right-Click to Start/Stop the animation and Left-Click to display a child window, keeping the background animation alive.

For your convenience, the code can be copied and pasted from your browser or downloaded (.zip format).


#include "stdafx.h"
#include "banner.h"
#include "mainfrm.h"

#include "resource.h"

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMdiMainClient

CMdiMainClient::CMdiMainClient()
	:	m_sizeClient(0, 0)
		
{
	VERIFY (m_bmpBackGround.LoadBitmap(IDB_BCKGRD)); 
	ASSERT (m_bmpBackGround.GetSafeHandle());

	VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP0));
	ASSERT (m_bmpBackGround2.GetSafeHandle());

	BmpLoaded = 1;
	StopRotation = FALSE;
}

CMdiMainClient::~CMdiMainClient()
{
	if(m_bmpBackGround.GetSafeHandle())
		m_bmpBackGround.DeleteObject();

	if(m_bmpBackGround2.GetSafeHandle())
		m_bmpBackGround2.DeleteObject();
}


BEGIN_MESSAGE_MAP(CMdiMainClient, CWnd)
	//{{AFX_MSG_MAP(CMdiMainClient)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	ON_WM_TIMER()
	ON_WM_ERASEBKGND()
	ON_WM_RBUTTONDOWN()
	ON_WM_LBUTTONDOWN()
	ON_WM_SIZE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CMdiMainClient message handlers
BOOL CMdiMainClient::OnEraseBkgnd(CDC* pDC)
{
	// Erase only the area needed
	CRect rect;
	GetClientRect(&rect) ;
   
	SetTimer(0,300,NULL);
                                       
	// Place the bitmap
	BITMAP bm ;
	CDC dcMem ;

	BITMAP bm2 ;
	CDC dcMem2;

     
	VERIFY(m_bmpBackGround.GetObject(sizeof(bm), (LPVOID)&bm));
	dcMem.CreateCompatibleDC(NULL);
	CBitmap* pbmpOld = (CBitmap*)dcMem.SelectObject(&m_bmpBackGround); 
	ASSERT(pbmpOld) ;
	// Display red background
	pDC->StretchBlt(0, 0, rect.right, rect.bottom, &dcMem, 0,
				0, bm.bmWidth, bm.bmHeight,SRCCOPY);

	VERIFY(m_bmpBackGround2.GetObject(sizeof(bm2), (LPVOID)&bm2));
	dcMem2.CreateCompatibleDC(NULL);
	dcMem2.SelectObject(&m_bmpBackGround2);
	// Display picture background
	pDC->StretchBlt(200,100,400, 200, &dcMem2, 0,0, bm2.bmWidth, bm2.bmHeight,
					SRCCOPY);

	// Display Instructions
	pDC->SetBkColor(RGB(255,0,0));
	pDC->SetTextColor(RGB(192,192,192));
	pDC->TextOut(480, 500, "Mouse Right Click to Stop/Start Special Effects");
	pDC->TextOut(480, 515, "Mouse Left-Click to Show Child Window");

	// CleanUp
	dcMem.SelectObject(pbmpOld) ;

	return TRUE;
}      

////////////////////////////////////////////////////////////////////
//
void CMdiMainClient::OnSize(UINT nType, int cx, int cy)
{
    Default() ;                
    // if the app is just starting up, save the window
    // dimensions and get out

    if ((m_sizeClient.cx == 0) && (m_sizeClient.cy==0))
        {
        m_sizeClient.cx = cx;
        m_sizeClient.cy = cy;

        return ;
        }

    // if the size hasn't changed, break and pass to default

    if ((m_sizeClient.cx == cx) && ( m_sizeClient.cy == cy))
    { 
        return ;
    }

    // window size has changed so save new dimensions and force
    // entire background to redraw, including icon backgrounds

    m_sizeClient.cx = cx;
    m_sizeClient.cy = cy;
             
    RedrawWindow(NULL, NULL,
        RDW_INVALIDATE|RDW_ERASE|RDW_ERASENOW|RDW_ALLCHILDREN);    
            
    return ;                
}

void CMdiMainClient::OnTimer(UINT nIDEvent) 
{
	DisplayNextLogoFrame();
	CWnd::OnTimer(nIDEvent);
}


void CMdiMainClient::DisplayNextLogoFrame() 
{
		CRect rect;
		GetClientRect(&rect) ;
    
		BITMAP bm2 ;
		CDC dcMem2;

		CDC *pDC = GetDC();

		if (!StopRotation)
		{
			// Select next logo frame to be displayed
			switch (BmpLoaded)
			{
		case 1:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP1));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 2:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP2));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 3:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP3));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 4:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP4));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 5:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP5));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 6:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP6));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 7:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP7));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 8:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP8));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			case 9:	if(m_bmpBackGround2.GetSafeHandle())
					m_bmpBackGround2.DeleteObject();
			VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP9));
			ASSERT (m_bmpBackGround2.GetSafeHandle());
			break;
			}
			// Change Bitmap index
			if (BmpLoaded == 9)
				BmpLoaded = 0;
			else
				BmpLoaded++;
		}
          
	VERIFY(m_bmpBackGround2.GetObject(sizeof(bm2), (LPVOID)&bm2));
	dcMem2.CreateCompatibleDC(NULL);
	dcMem2.SelectObject(&m_bmpBackGround2);
	pDC->StretchBlt(200,100,400, 200, &dcMem2, 0,0, bm2.bmWidth, bm2.bmHeight,
		SRCCOPY);

	ReleaseDC(pDC);
}

void CMdiMainClient::OnRButtonDown(UINT nFlags, CPoint point) 
{
	if (StopRotation)
		StopRotation = FALSE;
	else
		StopRotation = TRUE;

	CWnd::OnRButtonDown(nFlags, point);
}

void CMdiMainClient::OnLButtonDown(UINT nFlags, CPoint point) 
{
	m_Hide_Logo = TRUE;
	KillTimer(0);

	// Display Application
	((CBannerApp*)AfxGetApp())->pDocTemplate->OpenDocumentFile(NULL);

	CWnd::OnLButtonDown(nFlags, point);
}

// MdiMainClient.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CMdiMainClient window

extern BOOL m_Hide_Logo;

class CMdiMainClient : public CWnd
{
// Construction
public:
	CMdiMainClient();

// Attributes
protected:
	CBitmap m_bmpBackGround2;
	CBitmap m_bmpBackGround;

	int BmpLoaded;
public:
	BOOL StopRotation;
	CSize m_sizeClient;

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CMdiMainClient)
	//}}AFX_VIRTUAL

// Implementation
public:
	void Display_Blank_Bitmap();
	void DisplayNextLogoFrame();
	virtual ~CMdiMainClient();
	// Generated message map functions
protected:
	//{{AFX_MSG(CMdiMainClient)
		// NOTE - the ClassWizard will add and remove member functions here.
		afx_msg BOOL OnEraseBkgnd(CDC* pDC);
		afx_msg void OnSize(UINT nType, int cx, int cy);
		afx_msg void OnTimer(UINT nIDEvent);
		afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
		afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

Download demo project - 86 KB

Download source - 3 KB



Comments

  • How can i do the same in a OpenGL device context?

    Posted by Legacy on 09/18/2001 12:00am

    Originally posted by: Lorien

    I have done all you tell for paint an image as bg before OpenGL paints window (without erasing it) but the result is a flicker betwen the bg i paint and the OpenGL render scene...

    If you know how can i handle the OpenGL device context (or render one) to use the BitBlt or similar functions, please, let me know by mail (in catalan, english or spanish) at: lorien@postmaster.co.uk

    Thanks.

    Lorien! :p

    Reply
  • Why do people still insist on not using hungarian?

    Posted by Legacy on 02/08/2000 12:00am

    Originally posted by: Nev Delap

    Why do people still insist on not using hungarian to name their variables???

    • Hungarian! Yuck!

      Posted by Nev Delap on 04/21/2012 09:11pm

      Maybe if I went back to C I'd rediscover a need for Hungarian. But now in 2012 I can't believe I ever thought that!

      Reply
    Reply
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