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Delay MessageBox with auto-close option

, , 13 Aug 2002 Ms-PL
This message box delays its dismissal by disabling the OK button for a delay interval. It also has an optional auto-close feature. There are two versions, one uses a WH_CBT hook and some basic window tricks like sub-classing to achieve its goal. The other one is more MFC-ied.
// DelayMsgBoxDemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DelayMsgBoxDemo.h"
#include "DelayMsgBoxDemoDlg.h"
#include "DelayMessageBox.h"
#include "DelayMessageBox2.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CDelayMsgBoxDemoDlg dialog



CDelayMsgBoxDemoDlg::CDelayMsgBoxDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDelayMsgBoxDemoDlg::IDD, pParent)
	, m_text(_T(""))
	, m_delay(0)
	, m_close(FALSE)
	, m_showicon(FALSE)	
	, m_icon(0)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDelayMsgBoxDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_EDIT1, m_text);
	DDX_Text(pDX, IDC_EDIT2, m_delay);
	DDV_MinMaxUInt(pDX, m_delay, 0, 120);
	DDX_Check(pDX, IDC_CHECK1, m_close);
	DDX_Check(pDX, IDC_CHECK2, m_showicon);
	DDX_Radio(pDX, IDC_RADIO1, m_icon);
}

BEGIN_MESSAGE_MAP(CDelayMsgBoxDemoDlg, CDialog)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_BUTTON1, OnBnShow)
	ON_BN_CLICKED(IDOK, OnBnClickedOk)
END_MESSAGE_MAP()


// CDelayMsgBoxDemoDlg message handlers

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

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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 function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CDelayMsgBoxDemoDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CDelayMsgBoxDemoDlg::OnBnShow()
{
	if(!UpdateData(true))
		return;
	CDelayMessageBox::MBIcon mbicon = CDelayMessageBox::MBIcon::MBICONNONE;
	

	if(m_showicon)
	{
		switch(m_icon)
		{
		case 0:
			mbicon = CDelayMessageBox::MBIcon::MBICONINFORMATION;
			break;
		case 1:
			mbicon = CDelayMessageBox::MBIcon::MBICONEXCLAMATION;
			break;
		case 2:
			mbicon = CDelayMessageBox::MBIcon::MBICONSTOP;
			break;
		case 3:
			mbicon = CDelayMessageBox::MBIcon::MBICONQUESTION;
			break;
		}
	}

	/*
		You may use either of the classes. 
		In behaviour they are identical.
		It's in the implementation that they differ.
	*/

	//CDelayMessageBox mbox(this);	
	CDelayMessageBox2 mbox(this);
	
	mbox.MessageBox(m_text,
		m_delay,
		m_close,(CDelayMessageBox2::MBIcon)mbicon);
	

}

void CDelayMsgBoxDemoDlg::OnBnClickedOk()
{
}

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This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

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About the Authors

Shog9
Software Developer
United States United States
Poke...

Nish Nishant
United States United States
Nish Nishant is a Software Architect/Consultant based out of Columbus, Ohio. He has over 16 years of software industry experience in various roles including Lead Software Architect, Principal Software Engineer, and Product Manager. Nish is a recipient of the annual Microsoft Visual C++ MVP Award since 2002 (14 consecutive awards as of 2015).

Nish is an industry acknowledged expert in the Microsoft technology stack. He authored
C++/CLI in Action for Manning Publications in 2005, and had previously co-authored
Extending MFC Applications with the .NET Framework for Addison Wesley in 2003. In addition, he has over 140 published technology articles on CodeProject.com and another 250+ blog articles on his
WordPress blog. Nish is vastly experienced in team management, mentoring teams, and directing all stages of software development.

Contact Nish : You can reach Nish on his google email id voidnish.

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