I have an NSComboBox whose contents (internal list) gets loaded dynamically
during the comboBoxWillPopUp notification. It is created with
setNumberOfVisibleItems:9 and setHasVerticalScroller:YES. The first time the
button is clicked, there is a removeAllItems and then the items are loaded in
(over 100 of them) but the drop-down list that appears is only a single item
tall and the scrollbar area is present, but plain gray with no scrollbar. All
the items are present --- you can click inside the dropdown and then drag up or
down to scroll through the list --- but you wouldn't know this from the
single-item-high dropdown and disabled scrollbar. If one of the items is
selected, that is the one shown in the single-line-high dropdown area. I can
read back numberOfVisibleItems and hasVerticalScroller and they are correct,
but what appears does not reflect these values.
The SECOND time you click the button, the dropdown comes up the proper height
and the scrollbar is present and active.
I've tried a bunch of things inside the notification routine to try to convince
it to do the right thing during the first dropdown -- calling
noteNumberOfItemsChanged, re-calling setNumberOfVisibleItems and
setHasVerticalScroller but with no effect.
How can I convince NSComboBox to do the right thing? Thanks
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