In TButtonGroup.ButtonOptions what does adding gboGroupStyle do?

Question

The help indicates that adding gboGroupStyle to the ButtonOptions on a TButtonGroup:

"Specifies that the buttons should inherit the group style that is set on the container."

But this explanation still leaves me lost - any ideas?

Answer 1

The gboGroupStyle option in the TButtonGroup.ButtonOptions property has nothing to do with GroupIndex as it's known e.g. from TSpeedButton.

Setting of the gboGroupStyle option to True allows you to:

• set the TButtonGroup.ItemIndex property, so you can predefine which button will be focused as default, nothing cool
• click the buttons with ENTER or SPACE keys, what will fire the TGrpButtonItem.OnClick event of the button item (if assigned), perform its action, or fire the TButtonGroup.OnButtonClicked event

I agree the name of this is quite misleading, but that's what I found in the source code from Delphi-XE2.