问题描述
ObjectPropertyBase在newValue == oldValue时跳过值无效:
/**
* {@inheritDoc}
*/
@Override
public void set(T newValue) {
if (isBound()) {
throw new java.lang.RuntimeException((getBean() != null && getName() != null ?
getBean().getClass().getSimpleName() + "." + getName() + " : ": "") + "A bound value cannot be set.");
}
if (value != newValue) {
value = newValue;
markInvalid();
}
}
问题:markInvalid()和value是private，因此我无法正确覆盖set(newValue).
Problem: markInvalid() and value are private, therefore I cannot override set(newValue) properly.
问题::如何获取不进行(value != newValue)检查的类型?
Question: How can I obtain a type, that does not do the (value != newValue) check?
此问题与此问题有关
推荐答案
扩展SimpleObjectProperty(或ObjectPropertyBase)并覆盖其set方法并跳过检查.虽然您无法自己调用markInvalid，但是该方法不能做很多您不能做的事情:
Extend SimpleObjectProperty (or ObjectPropertyBase) and override its set method and skip the check. While you can't call markInvalid yourself, the method doesn't do much you can't do:
class InvalidatingObjectProperty<T> extends SimpleObjectProperty<T> {
@Override
public void set(T newValue) {
if (isBound()) {
throw new java.lang.RuntimeException(
(getBean() != null && getName() != null ? getBean().getClass().getSimpleName() + "." + getName() + " : " : "")
+ "A bound value cannot be set.");
}
invalidated();
fireValueChangedEvent();
}
}
我们缺少的是将valid设置为false.但是，唯一重要的地方是它的toString方法，您也可以覆盖它.
What we're missing is setting valid to false. However, the only place where that matters is in its toString method, which you can override as well.
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