www.pudn.com > MyMp3sec.rar > ProgCtrlVol.cpp

// ProgCtrlVol.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "MyMp3sec.h" 
#include "ProgCtrlVol.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// ProgCtrlVol 
 
ProgCtrlVol::ProgCtrlVol() 
{ 
	//m_nPos=-1500; 
	//m_nStep=300; 
	//m_nLower=-3000; 
	m_nPos=50; 
	m_nStep=10; 
	m_nLower=0; 
	m_nUpper=100; 
	pDCBack=new CDC; 
	pDCFore=new CDC; 
	bmpBack.LoadBitmap(IDB_VOLUMEBACK); 
	bmpFore.LoadBitmap(IDB_VOLUMEFORE); 
} 
 
ProgCtrlVol::~ProgCtrlVol() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(ProgCtrlVol, CStatic) 
	//{{AFX_MSG_MAP(ProgCtrlVol) 
	ON_WM_PAINT() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// ProgCtrlVol message handlers 
 
void ProgCtrlVol::OnPaint()  
{ 
	CPaintDC dc(this); // device context for painting 
	 
	// TODO: Add your message handler code here 
	m_length=(float)m_nPos/(m_nUpper-m_nLower); 
	GetClientRect(&m_rect); 
	pDCBack->CreateCompatibleDC(&dc); 
	pDCFore->CreateCompatibleDC(&dc); 
	bmpBack.GetBitmap(&bmback); 
	bmpFore.GetBitmap(&bmfore); 
	pDCBack->SelectObject(bmpBack); 
	dc.StretchBlt(0,0,m_rect.Width(),m_rect.Height(),pDCBack,0,0,bmback.bmWidth,bmback.bmHeight,SRCCOPY); 
	(CBitmap*)pDCFore->SelectObject(bmpFore); 
	dc.StretchBlt(0,0,m_rect.Width()*m_length,m_rect.Height(),pDCFore,0,0,bmfore.bmWidth*m_length,bmfore.bmHeight,SRCCOPY); 
	pDCBack->DeleteDC(); 
	pDCFore->DeleteDC(); 
	// Do not call CStatic::OnPaint() for painting messages 
} 
 
int ProgCtrlVol::StepIt() 
{ 
	CRect tempRect=m_rect; 
	m_nPos+=m_nStep; 
	if(m_nPos>m_nUpper) 
	{ 
		m_nPos=m_nUpper; 
	} 
	InvalidateRect(&tempRect); 
	return 1; 
} 
 
int ProgCtrlVol::StepItt() 
{ 
	CRect tempRect=m_rect; 
	m_nPos-=m_nStep; 
	if(m_nPos