On Sat, Jul 26, 2008 at 10:10 AM, Shawn Boyette via RT <
bug-Curses-UI@rt.cpan.org> wrote:
Show quoted text> <URL:
http://rt.cpan.org/Ticket/Display.html?id=18046 >
>
> On Tue Mar 07 17:33:02 2006, guest wrote:
> > There is no clear way to have a control, during its onBlur event, cancel
> > the focus change and stay in the same control. This feature is commonly
> > available in other UI libraries I have worked with in the past, and very
> > useful for a variety of functions.
> >
> > Using $this->focus does not work, as it keeps focus in the control, but
> > the next control in focus order still gets highlighted like it has focus.
>
> Can you provide an example of when this is useful? I'm thinking that
> most actions which would result in an onBlur are nearly-instantaneous,
> so don't see how a user would have the chance to cancel anything, and
> off the top of my head I can't see why a program would, itself, decide
> to take an action and then immediately cancel it.
>
A very common reason to do so is to prevent the user from leaving the field
when the data entered is invalid.
I believe, if I recall correctly (I'm at home right now, don't have access
to the code I was working on), that I was working on an application that
worked with barcode scanning, and I needed to keep the cursor in the field
if an invalid barcode was scanned.
In both those scenarios, the user triggers the action, and the program
cancels it.
Are those examples sufficient?
Thanks,
Kevin
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Copyright 2008 Kevin the Blue <copy@kevin.lebleu.info>
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