Need way to define width and height in CSS

Pedro Duque Vieira pedro.duquevieira at
Wed Jan 23 04:18:35 PST 2013

Thanks for the clarifications Richard :)

On Wed, Jan 23, 2013 at 1:15 AM, Richard Bair <richard.bair at>wrote:

> Margins are actually separate, as they are the spacing on the outside of
> the Node, vs. Insets which is the distance from the edge of the node to the
> content (padding affects insets, but margins don't).
> Right now Margins are handled by each layout manager individually, but I'd
> like to make them generally defined for all Nodes. However how margins are
> used is a layout manager specific thing. For example, the CSS spec has
> instances where margins are collapsed -- but this is unique to the "box
> model layout manager" used by the web, and our layout managers don't do
> collapsing of margins. If one were to write a BoxModelPane for example,
> that layout manager could follow all the normal CSS layout rules.
> Richard
> On Jan 22, 2013, at 2:38 PM, Pedro Duque Vieira <
> pedro.duquevieira at> wrote:
> I'll press 2 :)
> Right now the state of things is a bit strange, because you have to use
> padding to define the width/height of regions.
> Margins would also be a nice addition, I don't know whether insets already
> cover the use case for margins but naming it margins would be more "css
> compliant".
> Cheers,
> On Tue, Jan 22, 2013 at 7:38 PM, Richard Bair <richard.bair at>wrote:
>> There are a few related issues that have come up over time, and I want to
>> make sure we're on the same page. Some nodes have a width and height,
>> other's don't. And for those that do, they aren't always a ResizableNode
>> (like a Rectangle). If this is your issue, press 1. HTML CSS is a
>> combination of visual and layout information. If your issue is that you
>> would like to describe layout information from CSS, press 2.
>> :-)
>> I assume you are interested in #2. If this is so, there are two things.
>> First ( This issue is
>> basically asking to be able to set pref-width etc from CSS. I think this
>> makes great sense. Also we want to be able to set Margins from CSS like we
>> can do padding today. These things make sense and are just something that
>> needs doing. But one thing that doesn't really make sense is "width:100%".
>> Partly this is because our system is based on layout managers who are going
>> to set the width / height based on the pref width / pref height etc. Partly
>> this is because in HTML CSS, they only have one "layout manager" (box
>> layout) and so some things which make sense in HTML CSS wouldn't in FX CSS
>> when placed in some kind of layout container.
>> We could do something more complicated, like "if width / height are set
>> by anything other than a layout container, then the layout container won't
>> set the width / or height." But that kind of hidden state is usually
>> problematic.
>> Richard
>> On Dec 11, 2012, at 3:50 PM, Pedro Duque Vieira <
>> pedro.duquevieira at> wrote:
>> > Hi,
>> >
>> > After some practice writing  JavaFX CSS one thing as become clear: a
>> way to
>> > clearly define a width and a height is lacking.
>> > In standard w3c css you have width and height, on JavaFX CSS you have
>> > padding - look at the way the size of the mark on a checkbox is defined
>> in
>> > caspian. Padding isn't the nicest way to define this because it is
>> supposed
>> > to define the spacing between an element and it's contents.
>> >
>> > Cheers,
>> >
>> > --
>> > Pedro Duque Vieira
> --
> Pedro Duque Vieira

Pedro Duque Vieira

More information about the openjfx-dev mailing list