Re: Assert raisied when closing multi-level modal dialog recursively

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On Fri, 17 Apr 2026 00:47:54 -0700 (PDT) Assen Mladenov wrote:

AM> I need to close (stacked) modal dialogs programmatically and I try doing 
AM> that in a recursive fashion, starting from the one on top.

 Why can't you just call EndModal() if you have the pointers to all dialogs
already?

AM> Here is the piece of code that is executed on the main event loop (the 
AM> app's):
AM> 
AM> static void closeAllDialogsRec(wxWindow* parent, wxApp *app) {
AM>     auto pclNode = parent->GetChildren().GetFirst();
AM>     while (pclNode) {
AM>         auto dlg = wxDynamicCast(pclNode->GetData(), wxDialog);
AM>         if (dlg && dlg->IsModal()) {
AM>             closeAllDialogsRec(dlg, app);
AM>             app->CallAfter([dlg, app]() mutable {
AM>                 wxCommandEvent evt(wxEVT_CLOSE_WINDOW);
AM>                 wxQueueEvent(dlg, evt.Clone());
AM>                 });
AM>             break;
AM>         }
AM>         pclNode = pclNode->GetNext();
AM>     }
AM> }
AM> 
AM> The issue is that the top one's event loop is active and it can be closed, 
AM> but the for the others below, their event loops are still inactive and it 
AM> fails for them. So on theory, we have to wait until the next dialog becomes 
AM> "active" and then close it only then. How though ?

 You probably need to close one dialog at a time, i.e. return to the main
event loop after closing the first dialog and then redoing it again as long
as there are more dialogs, but this risks being messy.

 Regards,
VZ

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