Re: Detecting A Changed Cell When Editing Ends
Re: Detecting A Changed Cell When Editing Ends
- Subject: Re: Detecting A Changed Cell When Editing Ends
- From: Jonathan Jackel <email@hidden>
- Date: Sun, 22 Dec 2002 20:36:33 -0500
It's pretty simple, as Mike explained earlier. This code in the delegate
(plus accessors for lastEditedControl) will "do stuff" when the user changes
a text field (or matrix) AND finishes editing.
- (void)controlTextDidChange:(NSNotification *)aNotification
{
[self setLastEditedControl:[aNotification object]];
}
- (void)controlTextDidEndEditing:(NSNotification *)aNotification
{
if ([aNotification object] == lastEditedControl)
{
//do stuff
}
}
In my case, it does not matter if the user edits the control, then changes
it back to what it was before. I simply wanted to avoid constantly updating
values in the UI, which seemed like a very jarring user experience. If
someone wanted to make sure the user changed the value, it seems like you
would want to capture the object value in controlTextShouldBeginEditing: and
compare it to the value in controlTextDidEndEditing:.
Jonathan
on 12/22/02 4:26 PM, David Rio Vierra at email@hidden wrote:
>
Have you tried storing the previous value of the control text and
>
comparing/updating it in controlTextDidEndEditing: ? Something like
>
this:
>
>
-(void)controlTextDidEndEditing:(NSNotification *)note
>
{
>
NSString * newText = [[note object] stringValue];
>
if( ! [newText isEqualToString:_oldText] ) // _oldText is an ivar
>
initialized to @"" {
>
[_oldText release];
>
_oldText = [newText retain];
>
// respond to changed text
>
}
>
}
>
>
- Rio
>
>
On Sunday, December 22, 2002, at 05:30 AM, Jonathan Jackel wrote:
>
>
> I want to know when a text field cell ends editing AND has been
>
> changed.
>
>
>
> controlTextDidChange: fires off a notification with every keystroke.
>
> I only
>
> want to know about the change when editing ends.
>
>
>
> controlTextDidEndEditing: notifies me when editing ends, whether the
>
> cell
>
> has changed or not. I want to know whether the cell has changed.
>
>
>
> Can someone point me in the right direction?
>
>
>
> Jonathan
>
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