// XTMemDC.cpp : implementation of the CXTMemDC class.
//
// This file is a part of the XTREME CONTROLS MFC class library.
// (c)1998-2012 Codejock Software, All Rights Reserved.
//
// THIS SOURCE FILE IS THE PROPERTY OF CODEJOCK SOFTWARE AND IS NOT TO BE
// RE-DISTRIBUTED BY ANY MEANS WHATSOEVER WITHOUT THE EXPRESSED WRITTEN
// CONSENT OF CODEJOCK SOFTWARE.
//
// THIS SOURCE CODE CAN ONLY BE USED UNDER THE TERMS AND CONDITIONS OUTLINED
// IN THE XTREME TOOLKIT PRO LICENSE AGREEMENT. CODEJOCK SOFTWARE GRANTS TO
// YOU (ONE SOFTWARE DEVELOPER) THE LIMITED RIGHT TO USE THIS SOFTWARE ON A
// SINGLE COMPUTER.
//
// CONTACT INFORMATION:
// support@codejock.com
// http://www.codejock.com
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"

#include "Common/XTPColorManager.h"
#include "Common/XTPDrawHelpers.h"
#include "XTMemDC.h"

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

IMPLEMENT_DYNAMIC(CXTMemDC, CDC)

//===========================================================================
// CXTMemDC class
//===========================================================================

CXTMemDC::CXTMemDC(CDC* pDC, const CRect& rect, CXTPPaintManagerColorGradient crBack/*=GetXtremeColor(COLOR_3DFACE)*/, BOOL bHorz/*=FALSE*/)
{
	ASSERT(pDC != NULL);
	m_pDC = pDC;
	if (!m_pDC)
		return;

	// If rect is NULL, use the device context's clip box.
	if (rect.IsRectEmpty())
		m_pDC->GetClipBox(&m_rc);
	else
		m_rc.CopyRect(&rect);

	// Create the memory DC, set Map Mode
	if (CreateCompatibleDC(m_pDC))
	{
		SetMapMode(m_pDC->GetMapMode());

		// Create a bitmap big enough to hold the window's image
		m_bitmap.CreateCompatibleBitmap(m_pDC, m_rc.Width(), m_rc.Height());

		// Select the bitmap into the memory DC
		m_hOldBitmap = (HBITMAP)SelectObject(&m_bitmap)->GetSafeHandle();

		if (crBack != COLORREF_NULL)
		{
			// fill background
			XTPDrawHelpers()->GradientFill(this, CRect(0, 0, m_rc.Width(), m_rc.Height()), crBack, bHorz);
		}

		m_bValid = TRUE;
	}

	// Something bad happened, could be GDI leak, didn't create device context.
	else
	{
		m_bValid = FALSE;
		m_hOldBitmap = NULL;
	}
}

CXTMemDC::~CXTMemDC()
{
	if (IsValid())
	{
		// Blt it
		m_pDC->BitBlt(m_rc.left, m_rc.top, m_rc.Width(), m_rc.Height(),
			this, 0, 0, SRCCOPY);
	}

	// Select the original bitmap back in
	if (m_hOldBitmap != NULL)
	{
		SelectObject(m_hOldBitmap);
		m_bitmap.DeleteObject();
	}

	DeleteDC();
}

CBitmap& CXTMemDC::GetBitmap()
{
	return m_bitmap;
}

void CXTMemDC::Discard()
{
	m_bValid = FALSE;
}

BOOL CXTMemDC::IsValid() const
{
	return m_bValid;
}

void CXTMemDC::FromDC()
{
	BitBlt(0, 0, m_rc.Width(), m_rc.Height(), m_pDC,
		m_rc.left, m_rc.top, SRCCOPY);
}