// BmpButton.cpp : 实现文件
//

#include "stdafx.h"
#include "MusicPlayer.h"
#include "BmpButton.h"


// CBmpButton

IMPLEMENT_DYNAMIC(CBmpButton, CButton)

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)
	ON_WM_PAINT()
	ON_WM_ERASEBKGND()
END_MESSAGE_MAP()



// CBmpButton 消息处理程序

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::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
	// TODO:  添加您的代码以绘制指定项

	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: 在此处添加消息处理程序代码
	// 不为绘图消息调用 CButton::OnPaint()

	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);
		}
	}

}

BOOL CBmpButton::OnEraseBkgnd(CDC* pDC)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	
	return FALSE;
//	return CButton::OnEraseBkgnd(pDC);
}

void CBmpButton::PreSubclassWindow()
{
	// TODO: 在此添加专用代码和/或调用基类
	
	// 在此设置按钮样式为自绘按钮
	ModifyStyle(0, GetStyle()|BS_OWNERDRAW);

	CButton::PreSubclassWindow();
}

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