topic Open and close a qwidget dialog in a utility Plugin in 3ds Max Programming Forum

Open and close a qwidget dialog in a utility Plugin

rodbrew2 — Mon, 26 Sep 2022 23:44:43 GMT

What is the proper way to open and close a qwidget dialog window in a utility plugin? I currently have the dialog open but when I close it it goes away but if I move off the Utilities tab and back again it will pop up again. So somehow it is not closing correctly. I haven't found a good modal window using qwidget in the sdk so I'm kind of winging it.

Thanks for any help.

Re: Open and close a qwidget dialog in a utility Plugin

rodbrew2 — Tue, 27 Sep 2022 23:18:11 GMT

Looking a little farther into this it's not so much closing the qwidget window as it is destroying the utility itself when the X on the qwidget window is pressed. I'm not sure how to tie those two together. I hope this makes sense.

Re: Open and close a qwidget dialog in a utility Plugin

Bendo_ — Wed, 28 Sep 2022 15:19:22 GMT

Doesn't deleting your qwindow is enough ?

Supposing your window is named "MyWindow"

class MyWindow(QWindow): def __init__(self, ...): # your stuff here def closeEvent(self, *args): del self

Re: Open and close a qwidget dialog in a utility Plugin

rodbrew2 — Thu, 29 Sep 2022 18:16:26 GMT

Hey Bendo I'm thinking it's not the qwidget window that's the problem it's actually shutting down the Utility plugin itself that seems to be missing. For instance if I add a button for the plugin on the Utility panel and press it the UI comes up and the button remains pressed. If I close the UI the button remains pressed. If I cycle it again the UI comes up as normal. If I don't unpress and navigate away from the utility panel and then back the button is still blue and the UI pops up again. I guess this is kind of expected as it does it with a normal rollout. A good example of the behavior I'm looking for is the Polygon Counter utility but with the qwidget.

Re: Open and close a qwidget dialog in a utility Plugin

rodbrew2 — Thu, 29 Sep 2022 20:59:19 GMT

Ok I think I got something figured out. Not sure if it's the best way but it seems to work. I added a closeEvent to my main UI in which I call the closeUtility function for my instance of the Utility plugin. I also have a flag that keeps track of whether the UI dialog is open of not. Like I said I'm not sure if this is the ideal way but it seems to work.

void Utility::BeginEditParams(Interface* ip, IUtil* u) { this->iu = u; this->ip = ip; if (dialogOpen == FALSE) { dialog = new UtilityUI_Main; dialog->setWindowModality(Qt::WindowModal); dialog->show(); dialogOpen = TRUE; } u->CloseUtility(); } void UtilityUI_Main::closeEvent(QCloseEvent* event) { if (myUtility.iu) myUtility.iu->CloseUtility(); dialogOpen = false; }