SAMPLE: Adding Control Bars to Dialog Boxes in MFCID: Q141751
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In a Microsoft Foundation Classes (MFC) application, you can attach
control bars such as status bars and toolbars to a frame window. However,
for many applications a simple dialog box-based user interface is
sufficient. MFC does not provide built-in support for adding control bars
to dialog boxes.
DLGCBR32 is a sample application that demonstrates how to add a status
bar and toolbar to a dialog box. In addition, it demonstrates a number of
techniques related to using a modeless dialog box as the main window of an
MFC application.
The following file is available for download from the Microsoft Software
Library:
~ Dlgcbr32.exeFor more information about downloading files from the Microsoft Software Library, please see the following article in the Microsoft Knowledge Base:
Q119591 How to Obtain Microsoft Support Files from Online Services
To add a control bar to a dialog box, you must create the control bar as
usual, and then make room for the control bar within the client area of
the dialog box. For the control bar to function properly, the dialog box
must duplicate some of the functionality of frame windows. If you want
ON_UPDATE_COMMAND_UI handlers to work for the control bars, you also need
to derive new control bar classes, and handle the WM_IDLEUPDATECMDUI
message. If your dialog box is not the main window of your application,
you will also need to modify its parent frame window to pass the
WM_IDLEUPDATECMDUI message on to the dialog box's control bars.
To make room for a control bar within the client area of the dialog box,
follow these steps in your dialog box's OnInitDialog() function:
CRect rcClientStart;
CRect rcClientNow;
GetClientRect(rcClientStart);
RepositionBars(AFX_IDW_CONTROLBAR_FIRST,
AFX_IDW_CONTROLBAR_LAST,
0, reposQuery, rcClientNow);
CPoint ptOffset(rcClientNow.left - rcClientStart.left,
rcClientNow.top - rcClientStart.top);
CRect rcChild;
CWnd* pwndChild = GetWindow(GW_CHILD);
while (pwndChild)
{
pwndChild->GetWindowRect(rcChild);
ScreenToClient(rcChild);
rcChild.OffsetRect(ptOffset);
pwndChild->MoveWindow(rcChild, FALSE);
pwndChild = pwndChild->GetNextWindow();
}
CRect rcWindow;
GetWindowRect(rcWindow);
rcWindow.right += rcClientStart.Width() - rcClientNow.Width();
rcWindow.bottom += rcClientStart.Height() - rcClientNow.Height();
MoveWindow(rcWindow, FALSE);
LRESULT CDlgToolBar::OnIdleUpdateCmdUI(WPARAM wParam,
LPARAM lParam)
{
if (IsWindowVisible())
{
CFrameWnd* pParent = (CFrameWnd*)GetParent();
if (pParent)
OnUpdateCmdUI(pParent, (BOOL)wParam);
}
return 0L;
}
To pass WM_IDLEUPDATECMDUI messages on to dialog boxes other than the main
window, save dialog pointers in your frame window class and create a
WM_IDLEUPDATECMDUI handler in that class. The handler should send the
WM_IDLEUPDATECMDUI message on to the dialog child windows by using
CWnd::SendMessageToDescendants(). Then perform default processing for the
message within the frame window.
Keywords : kbcode kbfile kbsample kbMFC KbUIDesign kbVC kbVC400 kbVC410 kbVC420 kbVC500 kbVC600 kbDialog
Version : 4.0 4.1 4.2 5.0 6.0
Platform : NT WINDOWS
Issue type :
Last Reviewed: July 20, 1999