www.pudn.com > VC写的MP3播放器源代码.zip > BitmapDialog.cpp

///////////////////////////////////////////////////////////////////////////// 
// BitmapDialog.cpp 
// 
 
#include "stdafx.h" 
#include "BitmapDialog.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapDialog dialog 
 
CBitmapDialog::CBitmapDialog() 
{ 
	CommonConstruct(); 
} 
 
 
CBitmapDialog::CBitmapDialog(UINT uResource, CWnd* pParent /*=NULL*/) 
	: CDialog(uResource, pParent) 
{ 
	CommonConstruct(); 
} 
 
 
CBitmapDialog::CBitmapDialog(LPCTSTR pszResource, CWnd* pParent /*=NULL*/) 
	: CDialog(pszResource, pParent) 
{ 
	CommonConstruct(); 
} 
 
 
void CBitmapDialog::CommonConstruct() 
{ 
	m_nType = BITMAP_TILE; 
	VERIFY(m_HollowBrush.CreateStockObject(HOLLOW_BRUSH)); 
 
	//{{AFX_DATA_INIT(CBitmapDialog) 
		// NOTE: the ClassWizard will add member initialization here 
	//}}AFX_DATA_INIT 
} 
 
 
BOOL CBitmapDialog :: SetBitmap(UINT uResource, int nType /*BITMAP_TILE*/) { 
	m_nType = nType; 
	ASSERT(m_nType == BITMAP_TILE || m_nType == BITMAP_STRETCH || m_nType == BITMAP_CENTER); 
	return m_bmpBackground.LoadResource(uResource); 
} 
 
 
void CBitmapDialog::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CBitmapDialog) 
		// NOTE: the ClassWizard will add DDX and DDV calls here 
	//}}AFX_DATA_MAP 
} 
 
 
BEGIN_MESSAGE_MAP(CBitmapDialog, CDialog) 
	//{{AFX_MSG_MAP(CBitmapDialog) 
	ON_WM_ERASEBKGND() 
	ON_WM_CTLCOLOR() 
	ON_WM_QUERYNEWPALETTE() 
	ON_WM_PALETTECHANGED() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapDialog message handlers 
 
BOOL CBitmapDialog::OnEraseBkgnd(CDC* pDC)  
{ 
	if(m_bmpBackground.GetPixelPtr() != 0) { 
		ASSERT(m_nType == BITMAP_TILE || m_nType == BITMAP_STRETCH || m_nType == BITMAP_CENTER); 
		 
		CRect rc; 
		GetClientRect(rc); 
		int x = 0, y = 0; 
 
		switch(m_nType) { 
			case BITMAP_CENTER: 
				// center the bitmap 
				CDialog::OnEraseBkgnd(pDC); 
				x = (rc.Width() - m_bmpBackground.GetWidth()) / 2; 
				y = (rc.Height() - m_bmpBackground.GetHeight()) / 2; 
				m_bmpBackground.DrawDIB(pDC, x, y); 
				break; 
 
			case BITMAP_STRETCH: 
				// stretch bitmap so it will best fit to the dialog 
				m_bmpBackground.DrawDIB(pDC, 0, 0, rc.Width(), rc.Height()); 
				break; 
 
			default: 
				// tile the bitmap 
				while(y < rc.Height()) { 
					while(x < rc.Width()) { 
						m_bmpBackground.DrawDIB(pDC, x, y); 
						x += m_bmpBackground.GetWidth(); 
					} 
					x = 0; 
					y += m_bmpBackground.GetHeight(); 
				} 
				break; 
		} 
	} else 
		// no bitmap set. behave like a normal dialog 
		return CDialog::OnEraseBkgnd(pDC); 
 
	return TRUE; 
} 
 
HBRUSH CBitmapDialog::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)  
{ 
	if(m_bmpBackground.GetPixelPtr() != 0) { 
		switch(nCtlColor) { 
			case CTLCOLOR_STATIC: 
				// The Slider Control has CTLCOLOR_STATIC, but doesn't let 
				// the background shine through, 
				TCHAR lpszClassName[255]; 
				GetClassName(pWnd->m_hWnd, lpszClassName, 255); 
				if(_tcscmp(lpszClassName, TRACKBAR_CLASS) == 0) 
					return CDialog::OnCtlColor(pDC, pWnd, nCtlColor); 
 
			case CTLCOLOR_BTN: 
				// let static controls shine through 
				pDC->SetBkMode(TRANSPARENT); 
				return HBRUSH(m_HollowBrush); 
 
			default: 
				break; 
		} 
	} 
	 
	// if we reach this line, we haven't set a brush so far 
	return CDialog::OnCtlColor(pDC, pWnd, nCtlColor); 
} 
 
BOOL CBitmapDialog::OnQueryNewPalette()  
{ 
	CPalette * pPal = m_bmpBackground.GetPalette(); 
	if( pPal != 0 && GetSafeHwnd() != 0 ) { 
		CClientDC dc(this); 
		CPalette * pOldPalette = dc.SelectPalette(pPal, FALSE); 
		UINT nChanged = dc.RealizePalette(); 
		dc.SelectPalette(pOldPalette, TRUE); 
 
		if (nChanged == 0) 
			return FALSE; 
 
		Invalidate(); 
		return TRUE; 
	} 
	return CDialog::OnQueryNewPalette(); 
} 
 
void CBitmapDialog::OnPaletteChanged(CWnd* pFocusWnd)  
{ 
	CPalette * pPal = m_bmpBackground.GetPalette(); 
	if( pPal != 0 && GetSafeHwnd() != 0 && pFocusWnd != this && ! IsChild(pFocusWnd) ) { 
		CClientDC dc(this); 
		CPalette * pOldPalette = dc.SelectPalette(pPal, TRUE); 
		UINT nChanged = dc.RealizePalette(); 
		dc.SelectPalette(pOldPalette, TRUE); 
 
		if( nChanged ) 
			Invalidate(); 
	} else 
		CDialog::OnPaletteChanged(pFocusWnd); 
}