www.pudn.com > mfc×ÊÔ´´óÈ«1.rar > btn_circular_button.shtml

 
 
    
    
    
 
 
 
 
 
 
 
Circular Push Button 
 
 
 
 
 
This code was contributed by Kunix. 
Only the implementation file for the circular button is listed below. This code uses 
the flicker free drawing code from Keith Rule's article. (That file is also included) 
 
Download Source. 50KB. 
 
 
// MyBtn.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "MyBtn.h" 
 
#include "MemDC.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CMyBtn 
 
CMyBtn::CMyBtn() 
{ 
} 
 
CMyBtn::~CMyBtn() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CMyBtn, CButton) 
	//{{AFX_MSG_MAP(CMyBtn) 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CMyBtn message handlers 
 
void CMyBtn::SetRound(void) 
{ 
	HRGN rgn; 
	CRect wrect; 
	GetClientRect(&wrect); 
    SetWindowRgn( NULL, FALSE ); 
	rgn = CreateEllipticRgn( wrect.left, wrect.top, 
								wrect.right, wrect.bottom ); 
 
	SetWindowRgn(rgn, TRUE);	 
} 
 
void CMyBtn::GradientFill (CDC* pDC, CRect* pRect) 
{ 
    CBrush* pBrush[64]; 
 
    for (int i=0; i<64; i++)  
	{ 
		pBrush[i] = new CBrush (RGB (0, 0, 255 - (i * 4))); 
    } 
 
    int nWidth = pRect->Width (); 
    int nHeight = pRect->Height (); 
    CRect rect; 
 
    for (i=0; iFillRect (&rect, pBrush[(i * 63) / nHeight]); 
    } 
 
    for (i=0; i<64; i++) 
        delete pBrush[i]; 
} 
 
void CMyBtn::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)  
{ 
	// TODO: Add your code to draw the specified item 
	CRect Rect = lpDrawItemStruct->rcItem; 
	CDC *pDC = CDC::FromHandle(lpDrawItemStruct->hDC); 
	CRgn rgn; 
	CRect rect; 
 
	rect = Rect; 
 
	UINT state = lpDrawItemStruct->itemState; 
 
	CMemDC	*pMemDC = new CMemDC( pDC, Rect); 
	CBrush hbr; 
	hbr.CreateSolidBrush(GetSysColor(COLOR_BTNFACE)); 
	//pDC->FillRect( &Rect, &hbr); 
	pMemDC->FillRect( &Rect, &hbr); 
	hbr.DeleteObject(); 
	 
	if( !(state & ODS_DISABLED) ) 
	{ 
		if (state & ODS_SELECTED) 
		{ 
			CPen pen( PS_SOLID, 2, GetSysColor( COLOR_3DHILIGHT ) ); 
			CPen *pPen; 
			CPoint start, end; 
 
			start.x = rect.left; 
			start.y = rect.bottom;		 
			end.x = rect.right; 
			end.y = rect.top; 
 
			rect.left += 2; 
			rect.top += 2; 
			rect.right -= 2; 
			rect.bottom -= 2; 
 
			pPen = pMemDC->SelectObject( &pen ); 
			pMemDC->Arc( &rect, start, end ); 
			pMemDC->SelectObject( pPen ); 
			pen.DeleteObject(); 
		} 
	} 
 
	rgn.CreateEllipticRgn( rect.left, rect.top,  
							rect.right, rect.bottom ); 
	 
	pMemDC->SelectClipRgn( &rgn );	 
	GradientFill( pMemDC, &Rect ); 
 
	SetRound(); 
 
	CString title; 
	GetWindowText( title ); 
	if( title.GetLength() != 0 ) 
	{ 
		DrawWhiteText( pMemDC, &Rect, title ); 
		title.ReleaseBuffer(); 
	} 
 
	delete pMemDC; 
} 
 
void CMyBtn::DrawWhiteText(CDC* pDC, CRect* pRect, CString& text ) 
{ 
    CFont font; 
    int nHeight = -16; 
 
    font.CreateFont (nHeight, 0, 0, 0, FW_BOLD, 
        TRUE, 0, 0, DEFAULT_CHARSET, OUT_CHARACTER_PRECIS, 
        CLIP_CHARACTER_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | 
        FF_DONTCARE, "Times New Roman"); 
 
    pDC->SetBkMode(TRANSPARENT); 
    pDC->SetTextColor(RGB (255, 255, 255)); 
 
    CFont* pOldFont = pDC->SelectObject (&font); 
    pDC->DrawText (text, -1, pRect, DT_SINGLELINE | DT_CENTER | 
					    DT_VCENTER); 
 
    pDC->SelectObject (pOldFont); 
} 
 
 
 
 
 
 
 
 
 
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© 1998 Zafir Anjum  
 
 
 
Contact me: zafir@home.com