How to Implement the animated background flag

 

 

The following code uses the CmdiMainClient class to display the animation background flag. The principle is very simple. We only need a series of continuous bitmaps to display them continuously. In this example, you can right-click the animation to start/stop the animation. If you click the left button, a subwindow is displayed to keep the animation going. For your convenience, you can copy the Code directly from the browser and insert it into your code. The following code is used:

 

 

# 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_bmp background.loadbitmap (IDB_BCKGRD ));

ASSERT (m_bmp background.getsafehandle ());

 

VERIFY (m_bmp background2.loadbitmap (IDB_BITMAP0 ));

ASSERT (m_bmp background2.getsafehandle ());

 

BMP loaded = 1;

StopRotation = FALSE;

}

 

CMdiMainClient ::~ CMdiMainClient ()

{

If (m_bmp background.getsafehandle ())

M_bmp background.deleteobject ();

 

If (m_bmp background2.getsafehandle ())

M_bmp background2.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;

 

& Nb