I do not understand what the function of the Pseudo-classes

I do not understand what the function of the CSS Pseudo-classes 'top', 'right', 'bottom' and 'left' in a tab pane.

Could someone explain to me? Can you give me an example?

Another thing... How to center the tabs in a tab pane?

In advance thank you very much to all

I do not understand what the function of the CSS Pseudo-classes 'top', 'right', 'bottom' and 'left' in a tab pane.

They are related to the side property.
http://docs.Oracle.com/JavaFX/2/API/JavaFX/scene/control/TabPane.html#sideProperty
The property side is where the tabs are placed with respect to the visible tab pane.

If you do not use this property, you don't need to worry their about to much.
The default value for the side is high, as the pseudo-class flaw that will be active.

Another thing... How to center the tabs in a tab pane?

Ask a separate question.

Tags: Java

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