Lazy calculation of tooltip text
Lazy calculation of tooltip text
- Subject: Lazy calculation of tooltip text
- From: Jonathan Taylor <email@hidden>
- Date: Fri, 06 Jul 2018 16:22:56 +0100
I have a UI item (text field) that displays a tooltip when the user hovers over
it. However, the information to be displayed in the tooltip is dynamic and
relatively expensive to compute. At the moment the tooltip is bound to a string
property which I manually update twice a second. It seems that the right way to
handle all this would be to compute the information only when I know the
tooltip is about to display. However, googling and searching of headers has not
led me to a way to do this. It seems that NSTextView has a method
textView:willDisplayToolTip:forCharacterAtIndex: which would seem to offer the
functionality I want. However, I can’t find anything equivalent for other view
types.
Any suggestions on how I might supply tooltip text dynamically, when the
tooltip is about to display?
[University of Glasgow: The Times Scottish University of the Year 2018]
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