// BmpButton.cpp : implementation file
//

#include "stdafx.h"
#include "EBook.h"
#include "BmpButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CBmpButton

CBmpButton::CBmpButton()
{
	m_InitDC = FALSE;
	m_NormalDC.CreateCompatibleDC(NULL);
	m_DisableDC.CreateCompatibleDC(NULL);
	m_DownDC.CreateCompatibleDC(NULL);
	m_ButType = BT_NORMAL;
}

CBmpButton::~CBmpButton()
{
	m_DisableDC.DeleteDC();
	m_DownDC.DeleteDC();
	m_NormalDC.DeleteDC();
}


BEGIN_MESSAGE_MAP(CBmpButton, CButton)
	//{{AFX_MSG_MAP(CBmpButton)
	ON_WM_PAINT()
	ON_WM_ERASEBKGND()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBmpButton message handlers

void CBmpButton::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	// 在此设置按钮样式为自绘按钮
	ModifyStyle(0, GetStyle()|BS_OWNERDRAW);

	CButton::PreSubclassWindow();
}

void CBmpButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your code to draw the specified item
	CRect rect;
	GetClientRect(&rect);
	UINT status = lpDrawItemStruct->itemState;
	CClientDC dc(this);

	m_Status = BTS_NORMAL;
	dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_NormalDC,0,0,SRCCOPY);

	if (status & ODS_DISABLED)
	{
		dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_DisableDC,0,0,SRCCOPY);
		m_Status = BTS_DISABLE;
	}
	else if (status & ODS_SELECTED)
	{
		m_Status = BTS_DOWN;
		dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_DownDC,0,0,SRCCOPY);
	}	
}

void CBmpButton::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	if (m_InitDC)
	{
		CRect rect;
		GetClientRect(&rect);

		if (IsWindowEnabled())
		{
			dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_NormalDC,0,0,SRCCOPY);
		}
		else
		{
			dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_DisableDC,0,0,SRCCOPY);
		}
	}
	
	// Do not call CButton::OnPaint() for painting messages
}

BOOL CBmpButton::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	return FALSE;
	//return CButton::OnEraseBkgnd(pDC);
}

void CBmpButton::LoadBitmaps(UINT nIDBitmapResource, UINT nIDBitmapResourceSel, UINT nIDBitmapResourceDisabled)
{
	CBitmap bmp;
	bmp.LoadBitmap(nIDBitmapResource);
	m_NormalDC.SelectObject(&bmp);
	
	bmp.DeleteObject();
	
	if (nIDBitmapResourceSel != 0)
	{
		bmp.LoadBitmap(nIDBitmapResourceSel);
		m_DownDC.SelectObject(&bmp);		
		bmp.DeleteObject();
		m_ButType |= BT_DOWN;
	}
	
	if (nIDBitmapResourceDisabled != 0)
	{
		bmp.LoadBitmap(nIDBitmapResourceDisabled);
		m_DisableDC.SelectObject(&bmp);		
		bmp.DeleteObject();
		m_ButType |= BT_DISABLE;
	}
	
	m_InitDC = TRUE;
}

void CBmpButton::SetButType(int nType)
{
	m_ButType |= nType;
}