I have an NSTextField in an NSCollectionView. If I type in a change
to the NSTextField, then without hitting tab or clicking elsewhere in
the NSCollectionView I click on a popup menu in the window, the
NSTextField aborts the edit and loses the information without any kind
of notice being given to the NSTextField.
I solved the problem by subclassing NSTextFieldCell and overriding the
method endEditing, passing it up to the superclass after first sending
an emergency message to the window controller, along with a copy of
the NSTextField, indicating it needs to grab the edited string out of
the NSTextField because the information is about to be lost.
I tried monitoring resignsFirstResponder. I can then click on the
NSTextFields in the NSCollectionView and get resignsFirstResponder
messages as expected. If I click on an NSTextField and then hit a key
to begin an edit, the sequence of messages is as follows:
NSTextField gets the message:
textShouldBeginEditing
The NSTextField delegate, which is an NSCollectionViewItem, gets the
message:
control:textShouldBeginEditing
NSTextField gets the message:
textDidBeginEditing
The NSTextField delegate gets the message:
control:textDidBeginEditing
After I type in some text, if I were to click on the popup as
described, neither NSTextField nor its delegate gets any of the text
did/should end editing messages which correspond with the above
messages. FWIW, if rather than clicking on the popup menu I click on
another text field, the NSTextField gets both of the
textShouldEndEditing messages, but not any textDidEndEditing
messages. After those messages, it gets the expected
resignsFirstResponder message.
If after I click on the popup menu I click on another NSTextField, I
do get a resignsFirstResponder message from an NSTextField, but by
that time the information in the field I had edited has already been
lost.
So is this a bug? Is it a feature? Am I missing something? Has
someone already found an easier way of dealing with this? If someone
else is already wondering about this problem, then this is the way I
solved it.
DC
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