Open Radar

 
Summary:
The class reference for subclasses of NSControl does not always state when they send their action message.

For example, NSButton[1] states that it is a subclass of NSControl and that
“An NSButton object sends an action message to a target object, such as a view controller, when the button is clicked.”

NSDatePicker[2] declares that it is a subclass of NSControl but omits information about its action:
“NSDatePicker is a subclass of NSControl that provides a user interface for displaying and editing an NSDate object.”

NSBrowser[3] only references NSControl in the “Inherits from” tree, and information about its action can only be inferred from reading the documentation of the `sendsActionOnArrowKeys` property, or by searching the internet for the original NeXT documentation[4].

[1]: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSButton_Class/index.html#//apple_ref/occ/cl/NSButton
[2]: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSDatePicker_Class/index.html#//apple_ref/occ/cl/NSDatePicker
[3]: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSBrowser_Class/index.html#//apple_ref/occ/instp/NSBrowser/sendsActionOnArrowKeys
[4]: https://www.gnu.org/software/gnustep/resources/OpenStepSpec/ApplicationKit/Classes/NSBrowser.html