Yes, I probably want to know about all the changes of width / height (bind
to them).
I can do a check if my Node is a Region and use the properties there, but I
thought it would be more consistent if those were available straight from
Node.
Thanks
Sven
On Mon, Feb 11, 2013 at 4:42 PM, Richard Bair <richard.bair at oracle.com>wrote:
> Yes! In fact there is no prefWidth property on Node (no getPrefWidth,
> setPrefWidth, or prefWidthProperty). Rather the prefWidth() method is a
> computational method vs. an accessor.
>
> If you look at Region, you will find prefWidthProperty(), getPrefWidth(),
> and setPrefWidth (along with min width, max width, min height, max height,
> etc).
>
> The prefWidth() method will inspect the prefWidth property, minWidth
> property, maxWidth property etc and compute what the pref width for this
> node is at this time.
>
> Now, perhaps the question could be, why don't we have a computedPrefWidth
> property on node? I suspect it has to do with two things. First, the
> bindings associated with such a thing on a layout container would be pretty
> intense. That's not necessarily saying it couldn't be done ("its all
> software" as Hans Muller used to say -- we can do anything -- for a price).
> However I expect it would be difficult. The second reason is because we
> want to make it easy for subclasses to override the computation of the
> prefWidth (as each layout container for example have their own algorithm
> for figuring this out). As such, having method to override is much simpler
> than binding that has to be broken and reestablished (although again, not
> impossible).
>
> I'm guessing what you're wanting is a way to know when the pref size has
> changed?
>
> Richard
>
> On Feb 10, 2013, at 9:58 AM, Sven Reimers <sven.reimers at gmail.com> wrote:
>
> > Hi all,
> >
> > any special reason why there is not a prefWidthProperty on Node, although
> > it has a prefWidth?
> >
> > Thanks
> >
> > -Sven
> >
> > --
> > Sven Reimers
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Sven Reimers
* Senior Expert Software Architect
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Join the NetBeans Groups:
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