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Control Message Bar

, 23 Oct 2008 CPOL
Code to add a message bar to virtually any existing Windows control.
// CtrlMessageBarDemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CtrlMessageBarDemo.h"
#include "CtrlMessageBarDemoDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// CCtrlMessageBarDemoDlg dialog

CCtrlMessageBarDemoDlg::CCtrlMessageBarDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCtrlMessageBarDemoDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCtrlMessageBarDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_TREE1, m_tree);
	DDX_Control(pDX, IDC_LISTBOX, m_listbox);
	DDX_Control(pDX, IDC_LIST1, m_list);
	DDX_Control(pDX, IDC_EDIT1, m_edit);
	DDX_Control(pDX, IDC_BUTTON1, m_btn);
}

BEGIN_MESSAGE_MAP(CCtrlMessageBarDemoDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_RESET, OnReset)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


// CCtrlMessageBarDemoDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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
	m_iml.Create(IDB_ICONS_SML, 16, 0, RGB(255, 0, 255));
	m_imlLarge.Create(IDB_ICONS, 32, 0, RGB(255, 0, 255));
	m_imlMessage.Create(IDB_MSG_ICONS, 16, 0, RGB(255, 0, 255));
	m_list.SetImageList(&m_imlLarge, LVSIL_NORMAL);
	m_list.SetImageList(&m_iml, LVSIL_SMALL);
	m_tree.SetImageList(&m_iml, TVSIL_NORMAL);
	
	m_list.InsertColumn(0, _T("Hello"), LVCFMT_LEFT, 200);
	HTREEITEM hItemRoot = m_tree.InsertItem(_T("Root item"), 0, 0);
	for (int n = 0; n < 20; n++)
	{
	  CString sItem;
	  sItem.Format(_T("Item %d"), n+1);
	  m_list.InsertItem(n, sItem, 0);
	  m_tree.InsertItem(sItem, 1, 1, hItemRoot);
	  m_listbox.AddString(sItem);
	}
	m_tree.Expand(hItemRoot, TVE_EXPAND);

	AddInitialMessageBars();
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCtrlMessageBarDemoDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CDialog dlg(IDD_ABOUTBOX);
		dlg.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// 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 CCtrlMessageBarDemoDlg::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 CCtrlMessageBarDemoDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CCtrlMessageBarDemoDlg::AddInitialMessageBars()
{
  bar.Detach();
  VERIFY(bar.Attach(this));
  bar.SetResize();
  bar.SetImageList(&m_imlMessage);
  bar.SetText(_T("This is a dialog message"), 3);

  barEdit.Detach();
  VERIFY(barEdit.Attach(m_edit));
  barEdit.SetImageList(&m_imlMessage);
  barEdit.Show(FALSE);
  m_edit.SetWindowText(_T("Click in here to \r\nadd a message bar"));
  barEdit.SetShowMenuCallback(CCMBEdit::CMB_ShowMenuCallback);

  barList.Detach();
  VERIFY(barList.Attach(m_list));
  barList.SetImageList(&m_imlMessage);
  barList.SetText(_T("This is a message bar in a list, which lights up on mouse-over"), 3);
  barList.SetHighlightOnMouseOver(TRUE);

  barTree.Detach();
  VERIFY(barTree.Attach(m_tree));
  barTree.SetImageList(&m_imlMessage);
  barTree.SetText(_T("This is a wrapped message bar in a tree control, which is a non-default colour"), 1);
  barTree.SetWrapText(TRUE);
  barTree.SetColours(RGB(255, 192, 192), RGB(0, 0, 255));

  barListBox.Detach();
  VERIFY(barListBox.Attach(m_listbox));
  barListBox.SetImageList(&m_imlMessage);
  barListBox.SetText(_T("This is a message bar in a list, which is not wrapped, and is too long, so shows in a tool-tip"), 2);

  barBtn.Detach();
  VERIFY(barBtn.Attach(m_btn));
  barBtn.SetResize();
  barBtn.SetText(_T("Button message bar"));
}

void CCtrlMessageBarDemoDlg::OnReset() 
{
  AddInitialMessageBars();
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Paul Vickery
Software Developer (Senior)
United Kingdom United Kingdom
Originally from an electronics background, I moved into software in 1996, partly as a result of being made redundant, and partly because I was very much enjoying the small amount of coding (in-at-the-deep-end-C) that I had been doing!

I swiftly moved from C to C++, and learned MFC, and then went on to real-time C on Unix. After this I moved to the company for which I currently work, which specialises in Configuration Management software, and currently program mainly in C/C++, for Windows. I have been gradually moving their legacy C code over to use C++ (with STL, MFC, ATL, and WTL). I have pulled in other technologies (Java, C#, VB, COM, SOAP) where appropriate, especially when integrating with third-party products.

In addition to that, I have overseen the technical side of the company website (ASP, VBScript, JavaScript, HTML, CSS), and have also worked closely with colleagues working on other products (Web-based, C#, ASP.NET, SQL, etc).

For developing, I mainly use Visual Studio 2010, along with an in-house-designed editor based on Andrei Stcherbatchenko's syntax parsing classes, and various (mostly freeware) tools. For website design, I use Dreaweaver CS3.

When not developing software, I enjoy listening to and playing music, playing electric and acoustic guitars and mandolin.

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