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Visual C++

BMPButton.cpp：源码内容
							// BMPButton.cpp : implementation file
//
#include "stdafx.h"
#include "BMPButton.h"
#include "tools.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CBMPButton
CBMPButton::CBMPButton()
{
	m_pBuffer = NULL;
	m_iBufferLen = 0;
	m_hBitmap = NULL;
	m_color = RGB(233, 247, 229);
	m_iLeftTopOffset = 0;
	m_iRightBottomOffset = 0;
}
CBMPButton::~CBMPButton()
{
	if(m_pBuffer)
	{
		delete[] m_pBuffer;
	}
}
BEGIN_MESSAGE_MAP(CBMPButton, CButton)
	//{{AFX_MSG_MAP(CBMPButton)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
	ON_WM_ERASEBKGND() 
	ON_WM_PAINT()
	ON_WM_MOUSEMOVE()
	ON_MESSAGE(WM_MOUSELEAVE,OnMouseOut)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CBMPButton message handlers
BOOL CBMPButton::OnEraseBkgnd( CDC* pDC)
{
	RECT rcClient;
	this->GetClientRect(&rcClient);
	HBRUSH hOldBrush;
	HBRUSH hBrush = ::CreateSolidBrush(m_color);
	hOldBrush = (HBRUSH)pDC->SelectObject(hBrush);
	pDC->Rectangle(&rcClient);
	pDC->SelectObject(hOldBrush);
	
	::DeleteObject(hBrush);
	return TRUE;
}
//-------------------------------------------------------------------------------
void CBMPButton::OnPaint()
{
	CButton::OnPaint();
}
//-------------------------------------------------------------------------------
void CBMPButton::DrawItem(LPDRAWITEMSTRUCT lpDIS) 
{
	CDC	*pDC =CDC::FromHandle(lpDIS->hDC);
	CRect	rtControl(lpDIS->rcItem);
	
	CPen	pen,*old_pen;
	CBrush	brush,*old_brush;
	CString  strText;
	
	HFONT hOldFont = (HFONT)pDC->SelectObject ((HFONT)::GetStockObject (DEFAULT_GUI_FONT));
	
	UINT	state =lpDIS->itemState;
	
	if(state & ODS_FOCUS)
	{
		rtControl.DeflateRect(1,1);	//拥有焦点矩形变小
	}
	
	COLORREF	crBorder =::GetSysColor(COLOR_HIGHLIGHT);
		
	pen.CreatePen(PS_SOLID, 1, crBorder);
		
	if( state & ODS_SELECTED)
	{
			//按钮按下时
		brush.CreateSolidBrush(HLS_TRANSFORM(crBorder,+50,-50));
			
		pDC->SetTextColor(RGB(240,240,240));
	}
	else
	{
		//鼠标在区域内	
		brush.CreateSolidBrush(HLS_TRANSFORM(crBorder,+90,-66));
		pDC->SetTextColor(::GetSysColor(COLOR_BTNTEXT));
		
	}
	
	if(state &ODS_DISABLED)
		pDC->SetTextColor(::GetSysColor(COLOR_GRAYTEXT));//灰色字：禁用状态
	else if(state & ODS_SELECTED)
		pDC->SetTextColor(RGB(240,240,240));	//白色字：PUSH状态
	else if(MouseOver())	
		pDC->SetTextColor(0);	//黑色字：热感应状态
	else
		pDC->SetTextColor(::GetSysColor(COLOR_BTNTEXT));	//黑色字：普通状态	
	
	old_brush=pDC->SelectObject(&brush);
	old_pen  =pDC->SelectObject(&pen);
	
	pDC->Rectangle(rtControl);
	pDC->SetBkMode(TRANSPARENT);
	GetWindowText(strText);
	pDC->DrawText(strText,rtControl,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
	
	
	if(state & ODS_FOCUS)
	{
		rtControl.DeflateRect(3,3);
		pDC->DrawFocusRect(rtControl);
	}
	
	pDC->SelectObject(old_pen);
	pDC->SelectObject(old_brush);
	pDC->SelectObject(hOldFont);
	
	Display();
	
	
}
//-------------------------------------------------------------------------------
void CBMPButton::PreSubclassWindow( )
{
	ModifyStyle(0,BS_OWNERDRAW);	
	CButton::PreSubclassWindow();
}
//-------------------------------------------------------------------------------
BOOL    CBMPButton::OpenBmpFile(void)
{
	static char BASED_CODE szFilter[] = "BMP Files (*.bmp)|*.bmp|All Files (*.*)|*.*||";
	CFileDialog dlg(TRUE,"BMP",NULL,  OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,szFilter);
	if(dlg.DoModal() == IDOK)
	{
		CString strFilePath = dlg.GetPathName();
		return(setBmpFile(strFilePath));		
	}	
	return FALSE;
}
//-------------------------------------------------------------------------------
void    CBMPButton::getData(char* pBuffer, int& iDataLen)
{
	if(pBuffer)
	{
		memcpy(pBuffer, m_pBuffer, m_iBufferLen);
	}
	iDataLen = m_iBufferLen;
}
//-------------------------------------------------------------------------------
CString	CBMPButton::getImagePath(void)
{
	return m_strImagePath;	
}
//-------------------------------------------------------------------------------
void	CBMPButton::setOffset(int iLeftTop, int iRightBottom)
{
	m_iLeftTopOffset = iLeftTop;
	m_iRightBottomOffset = iRightBottom;
}
//-------------------------------------------------------------------------------
void	CBMPButton::setColor(COLORREF color)
{
	m_color = color;
}
//-------------------------------------------------------------------------------
BOOL	CBMPButton::setBmpFile(CString& strFileName)
{
	
	CFile file;
	if( !file.Open( strFileName, CFile::modeRead) )
		return FALSE;
	int iFileLen = file.GetLength();
	char* pData = new char[iFileLen];
	
	if(file.ReadHuge(pData,iFileLen) != iFileLen)
		return FALSE;
	
	m_strImagePath = strFileName;
	BOOL bResult =  setBmpData(pData, iFileLen);
	delete[] pData;
	return bResult;
}
//-----------------------------------------------------------------------------
BOOL	CBMPButton::setBmpData(char* pData, int iDataLen)
{
	m_bFirst = true;
	if(iDataLen <= 0)
	{
		return FALSE;
	}
	
	if(m_iBufferLen < iDataLen)
	{
		delete[] m_pBuffer;
		m_pBuffer = new char[iDataLen];
		m_iBufferLen = iDataLen;
	}
	if(!m_pBuffer)
	{
		return FALSE;
	}
	memcpy(m_pBuffer, pData, iDataLen);
	if(BufferToHBITMAP() == NULL)
	{
		return FALSE;
	}
	Display();
	return TRUE;	
}
//-----------------------------------------------------------------------------
void    CBMPButton::Display(void)
{
	if(NULL == m_hBitmap)
	{
		return;
	}
	CDC* pDC = this->GetDC();
	HBITMAP OldBitmap;
	CDC MemDC;
	MemDC.CreateCompatibleDC(pDC);
	OldBitmap=(HBITMAP)MemDC.SelectObject(m_hBitmap);
	RECT rcBmpButton;
	GetWindowRect(&rcBmpButton);		
	CWnd* pParentWnd = this->GetParent();
	if(m_bFirst)
	{
		RECT rcParentWnd;
		pParentWnd->GetWindowRect(&rcParentWnd);
		
		RECT rcNewPos;
		rcNewPos.top = rcBmpButton.top - rcParentWnd.top;
		rcNewPos.left = rcBmpButton.left - rcParentWnd.left;
		
		rcNewPos.right = rcNewPos.left + m_iWidth+ m_iLeftTopOffset + m_iRightBottomOffset;
		rcNewPos.bottom = rcNewPos.top + m_iHeight + m_iLeftTopOffset + m_iRightBottomOffset;
		
		this->MoveWindow(&rcNewPos);
		m_bFirst = false;
	}
	
	pDC->BitBlt(m_iLeftTopOffset,m_iLeftTopOffset,m_iWidth,m_iHeight,&MemDC,0,0,SRCCOPY);
	MemDC.SelectObject(OldBitmap);
}
//-----------------------------------------------------------------------------
HBITMAP		CBMPButton::BufferToHBITMAP()
{
	if(m_hBitmap)
	{
		::DeleteObject(m_hBitmap);
		m_hBitmap = NULL;
	}
	
	LPSTR	hDIB;
	LPSTR	lpBuffer = m_pBuffer;
	
	LPVOID				lpDIBBits;
	BITMAPFILEHEADER	bmfHeader;
	DWORD				bmfHeaderLen;
	
	bmfHeaderLen = sizeof(bmfHeader);
	strncpy((LPSTR)&bmfHeader,(LPSTR)lpBuffer,bmfHeaderLen);
	if (bmfHeader.bfType != ((WORD) ('M' << 8) | 'B')) return NULL;
	hDIB = lpBuffer + bmfHeaderLen;
	
	BITMAPINFOHEADER &bmiHeader = *(LPBITMAPINFOHEADER)hDIB ;
	BITMAPINFO &bmInfo = *(LPBITMAPINFO)hDIB ;
	
	m_iWidth = bmInfo.bmiHeader.biWidth;
	m_iHeight = bmInfo.bmiHeader.biHeight;
	
	int nColors = bmiHeader.biClrUsed ? bmiHeader.biClrUsed : 1 << bmiHeader.biBitCount; 
	
	if( bmInfo.bmiHeader.biBitCount > 8 )
		lpDIBBits = (LPVOID)((LPDWORD)(bmInfo.bmiColors + bmInfo.bmiHeader.biClrUsed) + 
		((bmInfo.bmiHeader.biCompression == BI_BITFIELDS) ? 3 : 0));
	else
		lpDIBBits = (LPVOID)(bmInfo.bmiColors + nColors);
	CDC* pDC = this->GetDC();
	m_hBitmap = CreateDIBitmap(pDC->m_hDC,&bmiHeader,CBM_INIT,lpDIBBits,&bmInfo,DIB_RGB_COLORS);
	return m_hBitmap;
}
//-----------------------------------------------------------------------------------------
//返回鼠标是否在按钮区域内
BOOL CBMPButton::MouseOver()
{
	return m_bOver;
}
//-----------------------------------------------------------------------------------------
void CBMPButton::OnMouseOut ()
{
	//鼠标已离开按钮区域
    m_bOver =FALSE;
	
	//重绘按钮
	InvalidateRect(NULL,FALSE);
	
}
//-----------------------------------------------------------------------------------------
void CBMPButton::OnMouseMove(UINT nFlags, CPoint point)
{
	/*if(m_bOver ==FALSE)
	{
		//鼠标在按钮之上
		m_bOver =TRUE;
		
		//按钮重绘
		InvalidateRect(NULL,FALSE);
		
		//跟踪鼠标
		//当鼠标离开按钮区域会收到WM_MOUSELEAVE,该消息直接调用OnMouseOut()
		TRACKMOUSEEVENT	tme;
		tme.cbSize =sizeof(TRACKMOUSEEVENT);
		tme.dwFlags =TME_LEAVE;
		tme.dwHoverTime=0;
		tme.hwndTrack =m_hWnd;
		::TrackMouseEvent(&tme);
	}*/
	CButton::OnMouseMove(nFlags, point);
}
//-----------------------------------------------------------------------------------------
void    CBMPButton::ClearBmp(void)
{
	if(m_hBitmap)
	{
		::DeleteObject(m_hBitmap);
		m_hBitmap = NULL;
	}
}

						