I haven’t looked at your code, but why not use a nil placeholder value when
binding? Pass an options dictionary with a key / value pair of
NSNullPlaceholderBindingOption / <the value you want to use when nil> to the
-bind:… method, or specify the value for the nil placeholder in the nib.
Something like:
[datePicker bind: NSValueBinding
toObject: self
withKeyPath: @“myDate"
options: @{ NSNullPlaceholderBindingOption, [NSDate futureDate] }];
Hope that helps...
—Rob
> On May 15, 2014, at 2:47 PM, Jonathan Mitchell <jonat...@mugginsoft.com>
> wrote:
>
> NSDatePicker cannot display or bind to a nil dateValue so I have put together
> something that might be of use when binding to NSDate instances that might be
> nil.
>
> https://github.com/ThesaurusSoftware/TFDatePicker
>
> Subclassing NSDatePickerCell is made difficult because NSDatePickerCell does
> not call - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView
> *)controlView to draw its interior.
> I therefore obscure the controls persistent dateValue by setting the fore and
> background colours equal.
>
> If anyone can think of a better approach I would be glad to hear it.
>
> Jonathan
>
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