Done. This was checked in on 1/20, and will be in our next nightly
build (hopefully today/tonight).
jim
On Jan 12, 2006, at 3:02 PM, William Krick wrote:
If you could do that for me, it would be greatly appreciated.
At the moment, I don't really have a need to compile the source
other than
to integrate this feature.
thank you so much for your time
-----Original Message-----
From: Jim Grandy [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 12, 2006 5:50 PM
To: William Krick
Cc: [email protected]
Subject: Re: [Laszlo-user] laszlo needs a shouldYieldFocus() method
On Jan 12, 2006, at 2:29 PM, William Krick wrote:
I think the code in LzFocus.as LzFocus.setFocus() would look
something like
this...
if ( !this.csel.shouldYieldFocus() )
return;
That looks right.
Then all focusable views would need to have a default
shouldYieldFocus()
method that simply returns true and that the user can override to
return
false if conditions aren't met. I'm not sure where this would go.
LzNode?
LzView? basecomponent?
LzView is a good choice. I don't think LzNodes are (or should be)
focusable. Just add a function declaration in LaszloView.as that
returns true.
The problem is that I'm not that familiar with the internal
workings of the
whole laszlo architecture so I'm not sure how best to shoehorn
this in
without breaking things.
I haven't tackled building the source yet. That looks pretty
daunting.
I forgot you might not have a contributor setup. This took me most of
a day to get working when I started, so unless you want to be set up
to build for some other reason, it might not be worth your time. Let
me know, I can put together a diff for you and get it integrated (or
help you with the setup if you are interested).
Thanks again!
jim
-----Original Message-----
From: Jim Grandy [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 11, 2006 6:09 PM
To: William Krick
Cc: [email protected]
Subject: Re: [Laszlo-user] laszlo needs a shouldYieldFocus() method
Sounds like a relatively straightforward addition, and I agree we
need something like that.
You've already pretty much written the RFC in your email, and the
change would be small. Could you at minimum write up a JIRA bug?
Contributing the change would also be fantastic, and ensure that it
happened on your timeframe. (I'd start looking in LzFocus.as, in
LzFocus.setFocus(), perhaps just after the line that sets
__LZsfrunning to true.)
jim
On Jan 11, 2006, at 2:28 PM, William Krick wrote:
We're trying to develop a fairly sophisticated application in
laszlo.
One of the most difficult and frustrating parts is validating user
input and
this may cause us to give up on laszlo entirely.
We really need the ability to stop a focus change if the contents
of a field
is invalid.
In Java, this problem was solved by giving each component a
shouldYieldFocus() method.
The way this works, when any other component wants to take focus,
either by
user action via keyboard or mouse, or programmatically, the focus
system has
to call the current focus owner's shouldYieldFocus() method first.
This
method by default just always returns true. However, you can
override the
method with your own implementation that can return false if certain
conditions aren't met. Returning false prevents the focus system
from
moving focus to the new component.
Laszlo really needs something similar in order for it to be viable
for
"real" applications. Otherwise we might as well just go back to
HTML forms
and do all our validation server-side.
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