Make SubScene Resizable (RT-31377)

Richard Bair richard.bair at
Tue Sep 17 07:59:08 PDT 2013

Personally I wish that it were possible to use pattern #2 with Rectangle, ImageView, and a bunch of others as well. Anything that *could* be resizable should have an option to be resizable. Heck, I wish it were possible to turn resizable on/off dynamically for SubScene or the others, not just an immutable property.

But an immutable property with a constructor to set it is a good first step (especially since we don't have time in this release to do anything more comprehensive or radical).


On Sep 17, 2013, at 1:15 AM, Pavel Safrata <pavel.safrata at> wrote:

> Hello,
> we want to make SubScene resizable (reporting min/pref/max sizes according to its root) for it to behave nicely when placed in layout ( ). For the main driver of SubScene's existence - 2D overlays over 3D content - this makes perfect sense. However, there are use-cases where the fixed size is needed. Mainly, every SubScene with 3D content probably wants the fixed size as the content bounds are not really meaningful after the perspective projection. So, we need to support both resizable and non-resizable SubScene.
> There are two basic options:
> 1. Follow the pattern used in layouts. As SubScene is not a layout class (doesn't inherit from Region), this would mean adding the six methods ( set{Min|Pref|Max}{Width|Height} ) and duplicating the Region's USE_COMPUTED_SIZE constant.
> + consistent with layouts
> - duplicated API
> - user needs six calls to make sure the SubScene has fixed size
> 2. Add an isResizable constructor argument, then just make the SubScene report root's min/pref/max sizes in the resizable case.
> + easy to use the SubScene in the fixed-size manner (and resizable, too)
> + small API change
> - probably an unfamiliar pattern we don't have elsewhere (but, SubScene is a pretty unique node)
> What do you think?
> Thanks,
> Pavel

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