问题
In JavaScript world it is often set element class to denote it's appearance, which is later defined by CSS.
Is this so in JavaFX?
For example, what if I want to color negative value in red in TableView cells? I would not code color directly, but assigned some class to a cell, like "negative" and later would color it into red with CSS.
I found PseudoClass class. Is it intended for this? It is marked "since 8", so is there any more mature API for this?
回答1:
If you want to add a style to a Node that you can toggle on and off, a PseudoClass is indeed the correct way to do it. It was indeed added in JavaFX 8.0, but that is the current stable version, so it is a mature API. Note that this creates a pseudoclass (:classname in CSS), not a "normal" class (.classname in CSS).
If you have a Node you want to style (lets call it node), you can use PseudoClass like this:
node.pseudoClassStateChanged(PseudoClass.getPseudoClass("negative"), true);
Do the same thing, except with false as the second argument, to turn it off again.
来源：https://stackoverflow.com/questions/37072514/how-to-add-class-or-pseudoclass-programmatically-to-custom-control-in-javafx