e616. Determining If a Focus Lost Is Temporary or Permanent
Posted borter
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了e616. Determining If a Focus Lost Is Temporary or Permanent相关的知识,希望对你有一定的参考价值。
A temporary focus-lost event occurs if the focus moves to another window. It‘s temporary because the component will gain the focus when its window becomes active again.
A permanent focus-lost event occurs if the focus moves to another component in the same window.
An example where this distinction might come in handy is in text field validation; a text field might not validate its contents in the case of a temporary loss of focus.
component.addFocusListener(new MyFocusListener());
public class MyFocusListener extends FocusAdapter {
public void focusGained(FocusEvent evt) {
// The component gained the focus.
}
public void focusLost(FocusEvent evt) {
// The component lost the focus.
boolean isTemporary = evt.isTemporary();
}
}
Related Examples |
以上是关于e616. Determining If a Focus Lost Is Temporary or Permanent的主要内容,如果未能解决你的问题,请参考以下文章