// TransparentStatic2.cpp : implementation file
//

#include "stdafx.h"
#include "TransparentStatic.h"


// CTransparentStatic

IMPLEMENT_DYNAMIC(CTransparentStatic, CStatic)
CTransparentStatic::CTransparentStatic()
{
}

CTransparentStatic::~CTransparentStatic()
{
}


BEGIN_MESSAGE_MAP(CTransparentStatic, CStatic)
   ON_MESSAGE(WM_SETTEXT,OnSetText)
   ON_WM_CTLCOLOR_REFLECT()
   ON_WM_ERASEBKGND()
END_MESSAGE_MAP()
// CTransparentStatic message handlers

LRESULT CTransparentStatic::OnSetText(WPARAM wParam,LPARAM lParam)
{
   LRESULT Result = Default();
   Invalidate();
   UpdateWindow();
   return Result;
}

HBRUSH CTransparentStatic::CtlColor(CDC* pDC, UINT /*nCtlColor*/)
{
   pDC->SetTextColor(m_crText);
   pDC->SelectObject(&m_font);
   pDC->SetBkMode(TRANSPARENT);  
   return (HBRUSH)GetStockObject(NULL_BRUSH);
}

BOOL CTransparentStatic::OnEraseBkgnd(CDC* pDC)
{
   if (m_Bmp.GetSafeHandle() == NULL)
   {
      CRect Rect;
      GetWindowRect(&Rect);
      CWnd *pParent = GetParent();
      ASSERT(pParent);
      pParent->ScreenToClient(&Rect);  //convert our corrdinates to our parents
      
      //copy what's on the parents at this point
      CDC *pDC = pParent->GetDC();
      CDC MemDC;
      MemDC.CreateCompatibleDC(pDC);
      m_Bmp.CreateCompatibleBitmap(pDC,Rect.Width(),Rect.Height());
      CBitmap *pOldBmp = MemDC.SelectObject(&m_Bmp);
	  MemDC.SetTextColor(m_crText);
	  MemDC.SelectObject(&m_font);
      MemDC.BitBlt(0,0,Rect.Width(),Rect.Height(),pDC,Rect.left,Rect.top,SRCCOPY);
      MemDC.SelectObject(pOldBmp);
      pParent->ReleaseDC(pDC);
   }
   else //copy what we copied off the parent the first time back onto the parent
   {
      CRect Rect;
      GetClientRect(Rect);
      CDC MemDC;
      MemDC.CreateCompatibleDC(pDC);
      CBitmap *pOldBmp = MemDC.SelectObject(&m_Bmp);
	  MemDC.SetTextColor(m_crText);
	  MemDC.SelectObject(&m_font);
      pDC->BitBlt(0,0,Rect.Width(),Rect.Height(),&MemDC,0,0,SRCCOPY);
      MemDC.SelectObject(pOldBmp);
   }

   return TRUE;
}

/*************************************************************
*add at  : 2014-08-11  by唐太闲
*describe: 设置CStatic的文本               
*************************************************************/
CTransparentStatic& CTransparentStatic::SetText(const CString& strText)
{
	if(IsWindow(this->GetSafeHwnd())) 
	{
		SetWindowText(strText);
	}
	return *this;
}

/*************************************************************
*add at  : 2014-08-11  by唐太闲
*describe: 设置字体和大小CreatePointFont的第一个参数要求很大，
		   乘了个7,7是随便定的               
*************************************************************/
CTransparentStatic& CTransparentStatic::SetMyFont(int nSize,const CString& strFont)
{
	/*VERIFY(m_font.CreateFont(nSize,//tc:这个数字是字体大小
		0,0,0,FW_NORMAL,FALSE,FALSE,0,ANSI_CHARSET,OUT_DEFAULT_PRECIS,
		CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH|FF_SWISS,strFont));
	SetFont(&m_font);*/
	m_font.CreatePointFont(nSize*7,strFont);
	Update();						//tc:设置完成后需要立即刷新

	return *this;
}

/*************************************************************
*add at  : 2014-08-11  by唐太闲
*describe: 设置文本颜色，m_crText在函数CtlColor中会用来进行设置               
*************************************************************/
CTransparentStatic& CTransparentStatic::SetTextColor(COLORREF crText)
{
	m_crText = crText;
	Update();//tc:设置完成后需要立即刷新
	return *this;
}

/*************************************************************
*add at  : 2014-08-11  by唐太闲
*describe: 通过父窗口强制刷新区域               
*************************************************************/
void CTransparentStatic::Update()
{
	CRect (rc);
	GetWindowRect(rc);
	RedrawWindow();

	GetParent()->ScreenToClient(rc);
	GetParent()->InvalidateRect(rc,TRUE);
	GetParent()->UpdateWindow();
}