windydlg.cpp

一个国人自己实现图像库的程序（有参考价值）

// WindyDlg.cpp : implementation file
//

#include "stdafx.h"
#include "picviewer.h"
#include "WindyDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CWindyDlg dialog


CWindyDlg::CWindyDlg(CWnd* pParent, FCDibEffect * dib)
	: CDialog(CWindyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CWindyDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	m_pOriDib = dib ;
	m_Origin = *dib ;
	FCImage		bk ;
	bk.LoadJpeg (MAKEINTRESOURCE (JPG_BACKGROUND), _T("JPG")) ;
	m_BkBrush = ::CreatePatternBrush (bk.GetHandle ()) ;
}
CWindyDlg::~CWindyDlg ()
{
	::DeleteObject (m_BkBrush) ;
}

void CWindyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CWindyDlg)
	DDX_Control(pDX, IDS_PREVIEW, m_Preview);
	DDX_Control(pDX, IDC_SHOW_WINDY, m_staShow);
	DDX_Control(pDX, IDC_SCROLLBAR_WINDY, m_sbarWindy);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CWindyDlg, CDialog)
	//{{AFX_MSG_MAP(CWindyDlg)
	ON_WM_HSCROLL()
	ON_WM_CTLCOLOR()
	ON_BN_CLICKED(IDC_WINDY_LEFT, OnWindyLeft)
	ON_BN_CLICKED(IDC_WINDY_RIGHT, OnWindyRight)
	ON_BN_CLICKED(IDC_WINDY_SMOOTH, OnWindySmooth)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWindyDlg message handlers

BOOL CWindyDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	// TODO: Add extra initialization here
	m_sbarWindy.SetScrollRange (1, m_pOriDib->Width() - 2, FALSE) ;
	m_sbarWindy.SetScrollPos (1) ;
	m_staShow.SetWindowText (_T("1")) ;

	RECT	rc ;
	m_Preview.GetClientRect (&rc) ;
	m_Origin.Stretch (rc.right, rc.bottom) ;
	DWORD	style = m_Preview.GetStyle () ;
	style |= SS_BITMAP | SS_CENTERIMAGE ;
	::SetWindowLong (m_Preview.GetSafeHwnd(), GWL_STYLE, style) ;
	this->CheckRadioButton (IDC_WINDY_LEFT, IDC_WINDY_RIGHT, IDC_WINDY_LEFT) ;
	this->SendMessage (WM_HSCROLL, MAKEWPARAM (SB_THUMBPOSITION, 1), (LPARAM)this->GetDlgItem (IDC_WINDY_LEFT)->m_hWnd) ;

	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void CWindyDlg::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_staShow.SetWindowText (num) ;

	m_CurrDib = m_Origin ;
	m_CurrDib.Windy (min (m_CurrDib.Width()-2, nPos*m_CurrDib.Width()/m_pOriDib->Width()),
				(IsDlgButtonChecked (IDC_WINDY_LEFT) == BST_CHECKED) ? DIRECT_LEFT : DIRECT_RIGHT
				,(IsDlgButtonChecked (IDC_WINDY_SMOOTH) == BST_CHECKED) ? TRUE : FALSE) ;
	pScrollBar->SetScrollPos (nPos) ;
	m_Preview.SetBitmap (m_CurrDib.GetHandle()) ;
	m_Preview.InvalidateRect (NULL) ;

	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}

HBRUSH CWindyDlg::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;
}

void CWindyDlg::OnWindyLeft() 
{
	// TODO: Add your control notification handler code here
 	m_CurrDib = m_Origin ;
	m_CurrDib.Windy (min (m_CurrDib.Width()-2, m_sbarWindy.GetScrollPos()*m_CurrDib.Width()/m_pOriDib->Width()), DIRECT_LEFT, (IsDlgButtonChecked (IDC_WINDY_SMOOTH) == BST_CHECKED) ? TRUE : FALSE) ;
	m_Preview.SetBitmap (m_CurrDib.GetHandle()) ;
	m_Preview.InvalidateRect (NULL) ;
}

void CWindyDlg::OnWindyRight() 
{
	// TODO: Add your control notification handler code here
	m_CurrDib = m_Origin ;
	m_CurrDib.Windy (min (m_CurrDib.Width()-2, m_sbarWindy.GetScrollPos()*m_CurrDib.Width()/m_pOriDib->Width()), DIRECT_RIGHT, (IsDlgButtonChecked (IDC_WINDY_SMOOTH) == BST_CHECKED) ? TRUE : FALSE) ;
	m_Preview.SetBitmap (m_CurrDib.GetHandle()) ;
	m_Preview.InvalidateRect (NULL) ;
}

void CWindyDlg::OnOK() 
{
	// TODO: Add extra validation here
	m_pOriDib->Windy (m_sbarWindy.GetScrollPos (), (IsDlgButtonChecked (IDC_WINDY_LEFT) == BST_CHECKED) ? DIRECT_LEFT : DIRECT_RIGHT, (IsDlgButtonChecked (IDC_WINDY_SMOOTH) == BST_CHECKED) ? TRUE : FALSE) ;
	CDialog::OnOK();
}

void CWindyDlg::OnWindySmooth() 
{
	// TODO: Add your control notification handler code here
	m_CurrDib = m_Origin ;
	m_CurrDib.Windy (min (m_CurrDib.Width()-2, m_sbarWindy.GetScrollPos()*m_CurrDib.Width()/m_pOriDib->Width()), (IsDlgButtonChecked (IDC_WINDY_LEFT) == BST_CHECKED) ? DIRECT_LEFT : DIRECT_RIGHT, (IsDlgButtonChecked (IDC_WINDY_SMOOTH) == BST_CHECKED) ? TRUE : FALSE) ;
	m_Preview.SetBitmap (m_CurrDib.GetHandle()) ;
	m_Preview.InvalidateRect (NULL) ;
}