> Am 20.12.2019 um 16:11 schrieb Fred Kiefer <fredkie...@gmx.de>:
>
> ...
>
> There you just describe that now the popup looks the same whether in pull
> down or in popup state. But what is the reason for this change? As I wrote I
> am happy with getting rid of all this special code, but last time I tried to
> do this it was rejected.
I don't recall whether I was involved in that rejection or not, but if I wasn't
I'd think that it was the correct move.
Regarding the different behavior with regard to the title cell, it apparently
dates back to the heyday of OpenStep (and presumably the original NeXTstep as
well). The idea seems to be that the title that is visible in the pop up button
cell when the menu is not visible should be backed up by an element of the
associated menu. In pop up mode this would be the selected item, while in pull
down mode it is invariably the first element of the menu (since the title of
the pull down is not supposed to change depending on the user's last
selection). I think that's nothing that GNUstep can or should change.
That only leaves you with the option whether to display the title item when the
pull down is visible or to not display it. If you wanted to display the title,
the only reasonable choice for that would be such that the title item appears
above the button itself (because otherwise you would redundantly display the
same information twice). But then that doesn't work that well if you display an
icon in the button cell rather than text (useful, for instance, when you want
to make NSToolbar buttons with an attached pull down menu) and the popup
button's width and/or height do not match the width or height of the menu
(items). Also beware that the menu does not necessarily need to appear at the
bottom of the pop up button. You can set the preferredEdge property of the
button cell to make it appear on one of the sides of the button (or even appear
attached to the top edge, although I don't see a reason for doing that). But of
course these are all aesthetic judgements so feel free to disagree.
Wolfgang
