Re: NSTextField getting input number by number
Re: NSTextField getting input number by number
- Subject: Re: NSTextField getting input number by number
- From: "Jay Rimalrick" <email@hidden>
- Date: Sat, 15 Nov 2003 21:20:54 -0500
I still have the problem no matter if I use the formatter provided with interface builder or make my own that I cannot get float values. I am overriding the function controlTextDidChange and here is the problem that I am encountering.
I enter '1' and it understands it is a one. I then enter a decimal point makeing it '1.' and the computer understands a one again simplifying my '1.' thus when I enter another number it results in '12' instead of '1.2'
How can I resolve this?
Thanks again for everyone's great help I know we be able to solve this problem.
-jay
>
I was suggesting the same thing as Louis, as well as the answer to your
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question... Perhaps it was not worded clearly/explicitly. (I
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suggested a delegate for your formatter, which does not actually work,
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since NSFormatters cannot have delegates).
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>
You will need to set up a method to do the calculation in some other
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class. Then you can send a message to that method from your formatter
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using one of the performSelector: methods listed here:
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>
http://developer.apple.com/documentation/Cocoa/Reference/Foundation/
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ObjC_classic/Classes/NSObject.html
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>
If you are unfamiliar with the use of selectors, I suggest you read the
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section describing their usage (also at the above link).
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>
>
On 2003 Nov 15, at 15:22, Jay Rimalrick wrote:
>
>
> Louis and all
>
>
>
> This is a great feature that I was not aware of. However, I have one
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> more
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> question. If I would want to do calculations on the text entered as
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> it is
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> entered where would i do that?
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>
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> Thanks,
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> jay
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>
>
>
>
>> Hello...
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>>
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>> Another approach would be to subclass NSNumberFormatter, and override
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> the
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>>
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>> - (BOOL)isPartialStringValid:(NSString *)partialString
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>> newEditingString:(NSString **)newString errorDescription:(NSString
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>> **)error;
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>>
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>> method. That formatter method should be called for every character
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>> entered into the textfield, and you can do whatever verification or
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>> notification you want.
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>>
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>> Once you've made your subclass of the formatter, just read the header
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>> file into IB and you will be able to select it in the "custom class"
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>> pane of the Interface Builder inspector for the formatter, so that
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>> the formatter will be an instance of your subclass instead of the
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>> standard NSNumberFormatter.
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>>
>
>> Louis
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>>
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>>
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>>> i am using controlTextdidChange but it does not work when I have the
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>>> textfield formatted to handle money or float values larger than 0
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>>> ... for
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> some
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>>> reason It will not pick up the decimal
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>>>
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>>> if i type in 1.2 it only recognized 12
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>>>
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>>> any idea?
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>>>
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>>>
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>>>> - (void)controlTextDidChange:(NSNotification *)aNotification
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>>>>
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>>>> At 5:51 PM -0500 11/14/03, Jay Rimalrick wrote:
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>>>>> I want to capture a number being typed into an NSTextField number
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>>>>> by
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>>>>> number including float values. Thus entering 1.2 would work like
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>>>>> this
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>>>>>
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>>>>> type 1 -> (calculations are done for the value 1)
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>>>>> type . -> (calculations are done for the value 1.)
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>>>>> type 2 -> (calculations are done for the value 1.2)
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>>>>>
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>>>>> What delegate method should I use for this? I am also trying to
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>>>>> use an
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>>>>> Interface Builder formatter on the NSTextField to keep the values
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> positive.
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>>>>>
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>>>>> Thanks in advance,
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>>>>> jay
>
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