adjbrightdlg.cpp

一个国人自己实现图像库的程序（有参考价值）

// AdjBrightDlg.cpp : implementation file
//

#include "stdafx.h"
#include "picviewer.h"
#include "AdjBrightDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAdjBrightDlg dialog


CAdjBrightDlg::CAdjBrightDlg(CWnd* pParent /*=NULL*/, FCDibEffect * dib)
	: CDialog(CAdjBrightDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CAdjBrightDlg)
	//}}AFX_DATA_INIT
	m_pOrigin = dib ;
	m_Origin = *dib ;

	FCImage		bk ;
	bk.LoadJpeg (MAKEINTRESOURCE (JPG_BACKGROUND), _T("JPG")) ;
	m_BkBrush = ::CreatePatternBrush (bk.GetHandle ()) ;
}
CAdjBrightDlg::~CAdjBrightDlg ()
{
	::DeleteObject (m_BkBrush) ;
}

void CAdjBrightDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAdjBrightDlg)
	DDX_Control(pDX, IDS_PREVIEW, m_Preview);
	DDX_Control(pDX, IDS_BRIGHT, m_sBright);
	DDX_Control(pDX, IDC_ADJ_CONTRAST, m_sbContrast);
	DDX_Control(pDX, IDC_ADJ_BRIGHT, m_sbBright);
	DDX_Control(pDX, IDS_CONTRAST, m_sContrast);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CAdjBrightDlg, CDialog)
	//{{AFX_MSG_MAP(CAdjBrightDlg)
	ON_BN_CLICKED(IDOK, OnOk)
	ON_WM_HSCROLL()
	ON_WM_CTLCOLOR()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAdjBrightDlg message handlers

BOOL CAdjBrightDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();

	// TODO: Add extra initialization here
	m_sbBright.SetScrollRange (0, 200, FALSE) ;
	m_sbBright.SetScrollPos (100) ;
	m_sbContrast.SetScrollRange (0, 200, FALSE) ;
	m_sbContrast.SetScrollPos (100) ;
	m_sBright.SetWindowText ("100") ;
	m_sContrast.SetWindowText ("100") ;
	m_iPosBri = m_iPosCon = 100 ;

	RECT	rc ;
	m_Preview.GetClientRect (&rc) ;
	m_Origin.SetUndoEnable (false) ;
	m_Origin.ConvertTo32Bit () ;
	m_Origin.Stretch (rc.right, rc.bottom) ;
	DWORD	style = m_Preview.GetStyle () ;
	style |= SS_BITMAP | SS_CENTERIMAGE ;
	::SetWindowLong (m_Preview.GetSafeHwnd(), GWL_STYLE, style) ;
	m_dib32 = m_Origin ;
	m_Preview.SetBitmap (m_dib32.GetHandle()) ;
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void CAdjBrightDlg::OnOk() 
{
	m_pOrigin->SetUndoEnable (true) ;
	m_pOrigin->AdjustBrightness (m_iPosBri, FALSE) ;
	m_pOrigin->SetUndoEnable (false) ;
	m_pOrigin->AdjustContrast (m_iPosCon) ;
	m_pOrigin->SetUndoEnable (true) ;
	CDialog::OnOK();
}

void CAdjBrightDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	//	Get Current Position
	if ((nSBCode != SB_THUMBPOSITION) && (nSBCode != SB_THUMBTRACK))
		nPos = pScrollBar->GetScrollPos () ;
	switch (nSBCode)
	{
		case SB_LINELEFT :
			nPos-- ; break ;

		case SB_LINERIGHT :
			nPos++ ; break ;

		case SB_PAGELEFT :
			nPos -= 5 ; break ;
		case SB_PAGERIGHT :
			nPos += 5 ; break ;
	}
	CString		num ;
	num.Format ("%i", nPos) ;
	m_dib32 = m_Origin ;
	switch (pScrollBar->GetDlgCtrlID ())
	{
		case IDC_ADJ_BRIGHT :
			m_iPosBri = nPos ;
			m_sBright.SetWindowText (num) ;
			break ;
		case IDC_ADJ_CONTRAST :
			m_iPosCon = nPos ;
			m_sContrast.SetWindowText (num) ;
			break ;
	}
	m_dib32.AdjustBrightness (m_iPosBri, FALSE) ;
	m_dib32.AdjustContrast (m_iPosCon) ;
	pScrollBar->SetScrollPos (nPos) ;
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
	m_Preview.SetBitmap (m_dib32.GetHandle()) ;
	m_Preview.InvalidateRect (NULL) ;
}

HBRUSH CAdjBrightDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
	HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
	
	// TODO: Change any attributes of the DC here
	if ((nCtlColor == CTLCOLOR_DLG) || (nCtlColor == CTLCOLOR_STATIC))
	{
		pDC->SetBkMode (TRANSPARENT) ;
		hbr = m_BkBrush ;
	}
	// TODO: Return a different brush if the default is not desired
	return hbr;
}