Re: NSTextField getting input number by number
Re: NSTextField getting input number by number
- Subject: Re: NSTextField getting input number by number
- From: Daniel Todd Currie <email@hidden>
- Date: Sat, 15 Nov 2003 20:00:36 -0800
Without looking at your source, I'd have no idea... Perhaps post the
segment of code where you read the text field values, and any other
code that would be useful.
On 2003 Nov 15, at 18:20, Jay Rimalrick wrote:
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
question... Perhaps it was not worded clearly/explicitly. (I
suggested a delegate for your formatter, which does not actually work,
since NSFormatters cannot have delegates).
You will need to set up a method to do the calculation in some other
class. Then you can send a message to that method from your formatter
using one of the performSelector: methods listed here:
http://developer.apple.com/documentation/Cocoa/Reference/Foundation/
ObjC_classic/Classes/NSObject.html
If you are unfamiliar with the use of selectors, I suggest you read
the
section describing their usage (also at the above link).
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
more
question. If I would want to do calculations on the text entered as
it is
entered where would i do that?
Thanks,
jay
Hello...
Another approach would be to subclass NSNumberFormatter, and
override
the
- (BOOL)isPartialStringValid:(NSString *)partialString
newEditingString:(NSString **)newString errorDescription:(NSString
**)error;
method. That formatter method should be called for every character
entered into the textfield, and you can do whatever verification or
notification you want.
Once you've made your subclass of the formatter, just read the
header
file into IB and you will be able to select it in the "custom
class"
pane of the Interface Builder inspector for the formatter, so that
the formatter will be an instance of your subclass instead of the
standard NSNumberFormatter.
Louis
i am using controlTextdidChange but it does not work when I have
the
textfield formatted to handle money or float values larger than 0
... for
some
reason It will not pick up the decimal
if i type in 1.2 it only recognized 12
any idea?
- (void)controlTextDidChange:(NSNotification *)aNotification
At 5:51 PM -0500 11/14/03, Jay Rimalrick wrote:
I want to capture a number being typed into an NSTextField number
by
number including float values. Thus entering 1.2 would work like
this
type 1 -> (calculations are done for the value 1)
type . -> (calculations are done for the value 1.)
type 2 -> (calculations are done for the value 1.2)
What delegate method should I use for this? I am also trying to
use an
Interface Builder formatter on the NSTextField to keep the values
positive.
Thanks in advance,
jay
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