In the FileChooser constructor we can specify the filePatternsAllowed parameter.

Using an OS native window, in a save file dialog these file type options are listed in a combo and the user can choose e.g. jpg or png.

If he types a filename and validates the dialog, the returned File object does not contain the extension (except if it was explicitily written there by the user).

How am I supposed to find out that he actually wants to save a jpg or a png?

Any update on this?

Sorry, haven’t looked at this.