How to convert modeless dialog to modal dialog at runtime?

Question

Hi,

In MFC MDI application , on clicking a menu I am launching a modal dialog and when clicking a button from this modal dialog I am launching modeless dialog and when clicking on a button from this modeless dialog I am launching a modal dialog., at this point before launching modal dialog I want to change modeless parent dialog to modal dialog? How to achieve it?

How to convert modeless dialog to modal dialog at runtime?

Answer 1

For example, try the following -

MDI application launches first modal dialog -

void CMainFrame::OnViewModal()
{
    // TODO: Add your command handler code here
    CModal dlg(this);

    dlg.DoModal();
}

Button clicked on first modal dialog to launch modeless dialog. The modal dialog is the owner window of the modeless dialog. Dismissing the modal dialog will automatically close the modeless dialog.

void CModal::OnBnClickedLaunch()
{
    // TODO: Add your control notification handler code here
    CModeless *pModeless = new CModeless;
    pModeless->Create(IDD_MODELESS, this);
    pModeless->ShowWindow(SW_SHOW);
}

The user clicks a button on the modeless dialog to launch the second modal dialog. Before launching the second modal dialog, the modeless dialog disables its owner window and then enables it after DoModal() returns.

void CModeless::OnBnClickedLaunchModal2()
{
    // TODO: Add your control notification handler code here
    CModal2 dlg2(this);
    CWnd *pOwner = GetOwner();
    ASSERT(pOwner->IsKindOf(RUNTIME_CLASS(CModal))); // Make sure owner window is a CModal object
    pOwner->EnableWindow(FALSE); // Disable first modal dialog so it can't be dismissed
    dlg2.DoModal();  // Do second modal dialog
    pOwner->EnableWindow(TRUE); // Enable first modal dialog
}

Answer 2

Hi,

I suggest you could try to use CFrameWnd :: BeginModalState and CFrameWnd :: EndModalState .

I suggest you could try to the following code:

// disable all main window descendants  
AfxGetMainWnd()->BeginModalState();  
  
//re-enable this window  
EnableWindow(TRUE);  

Best Regards,

Jeanine

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