本文介绍了双向绑定到属性否定的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

给定

DoubleProperty A;
DoubleProperty minusA;

有没有办法双向绑定他们的否定对方,所以A.get()= = -minusA.get(),两者都可以是 set()

is there a way to bind their negations bidirectionally to each other, so that A.get() == -minusA.get() at all times, and both can be set()?

推荐答案

我尝试过,但没有找到一种使用双向绑定的方法,但也可能在两者上都可以使用InvalidationListner?

I tried but did´t find a way by using a bidirectional binding but maybe you could use an InvalidationListner on both?

p>

Something like

A.addListener((Observable observable) -> {
        System.out.println("A is invalid");
        minusA.set(A.get() *-1);
    });

minusA.addListener((Observable observable) -> {
        System.out.println("minusA is invalid");
        A.set(minusA.get() * -1);
    });

那么你可以很容易地调用这两个DoubleProperties的setter方法,另一个值将改变为negativ值

then you could easily call the setter method of both DoubleProperties and the other value will change to the negativ value.

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06-04 09:44