CIconDialog - Selecting Icons

// IconDialogDemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "IconDialogDemo.h"
#include "IconDialogDemoDlg.h"

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

#include "IconDialog.h"

/////////////////////////////////////////////////////////////////////////////
// CIconDialogDemoDlg dialog

CIconDialogDemoDlg::CIconDialogDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CIconDialogDemoDlg::IDD, pParent)
	, m_dwMaxIconIndex( 0 )
	, m_strIconFile( _T("") )
	, m_dwIconIndex( 0 )	
{
	//{{AFX_DATA_INIT(CIconDialogDemoDlg)
	//}}AFX_DATA_INIT

	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CIconDialogDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CIconDialogDemoDlg)
	DDX_Control(pDX, IDC_LINK, m_wndLink);
	DDX_Control(pDX, IDC_PIC_ICON, m_wndPicIcon);	
	DDX_Control(pDX, IDC_SPN_ICONINDEX, m_wndSpinIconIndex);
	DDX_Text(pDX, IDC_TXT_ICONFILE, m_strIconFile);
	DDV_MaxChars(pDX, m_strIconFile, _MAX_PATH);	
	DDX_Text(pDX, IDC_TXT_ICONINDEX, m_dwIconIndex);	
	DDV_MinMaxDWord(pDX, m_dwIconIndex, 0, m_dwMaxIconIndex);
	// }}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CIconDialogDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CIconDialogDemoDlg)	
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_CMD_BROWSE, OnCmdBrowse)
	ON_EN_CHANGE(IDC_TXT_ICONINDEX, OnChangeTxtIconindex)	
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CIconDialogDemoDlg message handlers

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

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon( m_hIcon, TRUE );		// Set big icon
	SetIcon( m_hIcon, FALSE );		// Set small icon
	
	// TODO: Add extra initialization here

	CWnd* pWnd = (CWnd*)GetDlgItem( IDC_TXT_ICONINDEX );
	if( pWnd != NULL )
	{
		m_wndSpinIconIndex.SetBuddy( pWnd );
		m_wndSpinIconIndex.SetRange32( 0, 0 ); 
	}
	m_wndPicIcon.SetIcon( AfxGetApp()->LoadIcon( IDR_MAINFRAME ) );
	
	m_wndLink.SetURL( _T("mailto:armenh@web.am") ); 
	return TRUE;  // return TRUE  unless you set the focus to a control
}

//	If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CIconDialogDemoDlg::OnPaint() 
{
	if ( IsIconic() )
	{
		CPaintDC dc( this ); // device context for painting

		SendMessage( WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0 );

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics( SM_CXICON );
		int cyIcon = GetSystemMetrics( SM_CYICON );
		CRect rect;
		GetClientRect( &rect );
		int x = ( rect.Width() - cxIcon + 1 ) / 2;
		int y = ( rect.Height() - cyIcon + 1 ) / 2;

		// Draw the icon
		dc.DrawIcon( x, y, m_hIcon );
	}
	else
		CDialog::OnPaint();
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CIconDialogDemoDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CIconDialogDemoDlg::OnCmdBrowse() 
{
	UpdateData();

	CIconDialog dlg( m_strIconFile, m_dwIconIndex, this );
	if( dlg.DoModal() == IDOK )
	{
		m_strIconFile = dlg.GetIconFile();
		m_dwIconIndex = dlg.GetIconIndex();
			
		m_dwMaxIconIndex = dlg.GetIconCount() - 1; // DDV_MinMaxDWord - limits icon index
		m_wndSpinIconIndex.SetRange32( 0, m_dwMaxIconIndex ); 
		m_wndSpinIconIndex.Invalidate();

		UpdateData( FALSE );
		OnChangeTxtIconindex(); 
	}
}

void CIconDialogDemoDlg::OnChangeTxtIconindex() 
{
	UpdateData();
	
	if(!m_strIconFile.IsEmpty())
	{
		HICON hIcon = ::ExtractIcon(AfxGetInstanceHandle(), m_strIconFile, m_dwIconIndex);
		if(hIcon != NULL)
			m_wndPicIcon.SetIcon(hIcon);
	}
}