topic Re: how to stop it from closing in Modai Dialog (Enter key or ESC key ) in Archicad C++ API

how to stop it from closing in Modai Dialog (Enter key or ESC key )

nishida_jp — Fri, 13 Dec 2024 00:52:40 GMT

I am programming a c++ add-on using ArchiCAD27API + Visual Studio 2019 + Windows 10.

When I press the Enter key or ESC key in the Modai Dialog, the dialog closes.

Please tell me how to stop it from closing

Re: how to stop it from closing in Modai Dialog (Enter key or ESC key )

Oleg — Mon, 16 Dec 2024 12:58:24 GMT

Use the PanelCloseRequested of the PanelObserver.

See the AddRenameViewPointItemDialog.cpp of Navigator_Test example.

Re: how to stop it from closing in Modai Dialog (Enter key or ESC key )

nishida_jp — Tue, 24 Dec 2024 23:49:33 GMT

Thank you for your reply.
My program uses DGModalDialog() and I can't perform the processing you suggested.
If you know of any other ways, please let me know.

Re: how to stop it from closing in Modai Dialog (Enter key or ESC key )

Oleg — Wed, 25 Dec 2024 04:56:59 GMT

There is DG_MSG_CLOSEREQUEST message.
But unfortunately, it is not documetnted. I use C++ dialogs, and i dont know any details, sorry.

Re: how to stop it from closing in Modai Dialog (Enter key or ESC key )

nishida_jp — Wed, 08 Jan 2025 23:11:00 GMT

Thank you.

I try DG_MSG_CLOSEREQUEST.

Re: how to stop it from closing in Modai Dialog (Enter key or ESC key )

Miklos Vegh — Wed, 29 Jan 2025 11:48:07 GMT

You use a C-style dialog if I am correct.
In C-style dialogs the DG_MSG_CLOSEREQUEST is not used.

When you click the Ok or Cancel button or pess Esc/Enter, a DG_MSG_CLICK message is sent. If you return a 0 value in response of this message then the dialog will not be closed.
In general the dialog handler returns the button identifier for Ok/Cancel which enables the dialog to close, but you can return 0 to prevent closing the dialog:

case DG_MSG_CLICK: switch (itemId) { case DG_OK: case DG_CANCEL: if (doNotCloseDialog) { return 0; } return itemId; case AnyOtherButton: ... return 0;

An other approach could be to use the DGRegisterHotKey function to steal the Esc/Enter keyboard events and not allow them to be processed by the dialog. In this case the dialog will accept the click events on the Ok/Cancel button but refuse to respond to the Enter/Esc keys.