Re: Issuing NSTextField action message
Re: Issuing NSTextField action message
- Subject: Re: Issuing NSTextField action message
- From: Carl Hoefs <email@hidden>
- Date: Wed, 20 Aug 2014 12:27:45 -0700
On Aug 20, 2014, at 12:24 PM, Kyle Sluder <email@hidden> wrote:
>> On Aug 20, 2014, at 11:53 AM, Carl Hoefs <email@hidden> wrote:
>>
>>
>>> On Aug 20, 2014, at 11:18 AM, Kyle Sluder <email@hidden> wrote:
>>>
>>>> On Wed, Aug 20, 2014, at 01:13 PM, Carl Hoefs wrote:
>>>> I’m working on a financial system that accepts three variable user inputs
>>>> to a formula. When the user types into any of the three textfields, it
>>>> must update the other fields as the user types, without an Enter or
>>>> Return. Think of it like a currency exchange program or temperature
>>>> conversion, etc. so the user can immediately see the changes based on
>>>> each stroke of the input (sort of like how Spotlight takes as much as
>>>> you’ve typed in).
>>>>
>>>> So what I’ve managed to program so far is a KVO setup between three
>>>> textfields, and when the user enters a number into any one of them — and
>>>> presses Return — the others textfields update to reflect the new input.
>>>> I’m trying to do this same thing but without the need for the Return.
>>>
>>> NSTextField is not (documented to be) KVO-compliant. Don't try observing
>>> it.
>>>
>>> Instead, turn on the isContinuous property of your text fields (the
>>> "Continuous" checkbox under the State group on the Properties
>>> inspector). That'll send the text field's action on each key press.
>>
>> For the textfield ‘state’ I do have Continuous checked, but I don’t get an action sent. Does that setting somehow override the ‘Action’ setting (Sent On End Editing)?
>
> Well, I certainly *thought* it did…
>
> You might need to sign up as the text fields’ delegate and implement -controlTextDidChange:. (Or listen for NSControlTextDidChangeNotification.)
>
I do have -controlTextDidChange: set up, and it does get invoked on every keystroke typed into the textfields, but how do I then cause the textfield’s action method to be issued?
-Carl
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