Mfc get modal dialog list

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Hi,

I am working on unit test with MFC. My software is a SDI.

I have 2 threads : the first one is the graphic thread and the second one a unit test procedure which reproduce a user behavior. It is working well when there isn't modal dialog, I use SendMessage (to simulate click on button, or change text, etc.) which is blocking until the message has been treated so I haven't any sync issue.

But when the button opens a Modal CDialog I can't use SendMessage because the unit test thread is going to be blocked as long as the modal dialog is opened. So I use PostMessage and Sleep. And now my problem is to get the pointer of the current opened CDialog.

What I have tried:

Here is the code of the unit test

C++

bool UnitTestBoite()
{
   // Here I am in unit test thread
   CFrameWnd *pMainFrame = (CFrameWnd *)AfxGetMainWnd();
   // Post Message to notify the button ID_INSERER_BOITE is clicked
   pMainFrame->PostMessageW(WM_COMMAND, MAKELONG(ID_INSERER_BOITE, 0), 0);
   // In the handler of ID_INSERER_BOITE
   // there is something like CDialog dlg(pMainFrame, IDD_BASE_BOITE); dlg.DoModal();
   Sleep(1000);
   UINT myModalTemplateId = IDD_BASE_BOITE;
   ...

To get modal dialog pointer I tried :

C++

CWnd* pChild = pMainFrame->GetWindow(GW_CHILD);
while (pChild != nullptr)
{
    // Retrieve template ID
    UINT nResourceId = GetWindowLong(pChild->GetSafeHwnd(), GWL_ID);
    if (nResourceId == myModalTemplateId )
        break;
    pChild = pChild->GetWindow(GW_HWNDNEXT);
}
if (pChild == nullptr)
    return false;

or

C++

HWND hwndForeGround = ::GetForegroundWindow();
// Retrieve template ID
UINT nResourceId = GetWindowLong(hwndForeGround, GWL_ID);
if (nResourceId != myModalTemplateId )
   return false;

or

C++

CWnd *pModal = pMainFrame_->GetForegroundWindow();
  // Retrieve template ID
  UINT nResourceId = GetWindowLong(pModal->GetSafeHwnd(), GWL_ID);
  if (nResourceId != myModalTemplateId )
     return false;

None of these code snippet worked... The last solution I have thought was to make all my CDialog classes inherits from a custom class and register all opened CDialog, but it is a bit invasive... Is there an "elegant" means to do that ?

Thank for reading, Lucas.

Posted 3-Mar-16 21:57pm

lsarie

Updated 5-Mar-16 6:49am

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Serkan Onat · Answer 1 · 2016-03-05T06:49:00

Your first attempt will not work because , you looking for a modal dialog , which has a style of WS_POPUP
A popup window can not contain a style of WS_CHILD

Folowing code will not return dialog template ID (for popup windows), it returns control ID for child windows (including dialog template ID of child dialogs)
That field is used for menu resource ID for popup windows , so if your modal dialog has not got any menu then that function will return 0

GetWindowLong(hwndForeGround, GWL_ID);

GetLastActivePopup function (Windows)[^] can be used to get last popup window but you still can not idetify that dialog by Template ID , even if you will find a CDialog class

you will already use this for testing purpose ,you can compare window title to ensure that you found the dialog you looking for

following code should help

C++

CFrameWnd *pMainFrame = (CFrameWnd *)AfxGetMainWnd();
if(pMainFrame)
{
	CWnd *pWnd = pMainFrame->GetLastActivePopup();
	if(pWnd)
	{
		if(pWnd->IsKindOf(RUNTIME_CLASS(CDialog)))
		{
			CDialog *pDialog = reinterpret_cast<cdialog*>(pWnd);
			if(pDialog)
			{
				CString strTitle;
				pDialog->GetWindowText(strTitle);
				
				if(strTitle.CompareNoCase(_T("My Dialog")) == 0)
				{
					//we found dialog ,dismiss it
					pDialog->EndDialog(0);	
				}
			}
		}
	}
}