Swing:如何忽略取消选择事件? [英] Swing: how can I ignore deselection events?

问题描述

我的自定义组件由JPanel中的三个JTree组成.一次只能选择一个JTree，因此我为每个添加了TreeSelectionListener的对象调用了先前选择的JTree上的clearSelection(). (有关更多详细信息，请参见此处).

My custom component is composed of three JTrees inside a JPanel. Only one JTree should be selected at a time, so I've added a TreeSelectionListener to each of them that calls clearSelection() on the previously selected JTree. (See here for more details).

这很好，但是我需要防止被取消选择 时触发TreeSelectionListener.区分选择事件和取消选择事件的简单方法就绰绰有余了.

That works fine, but I need to prevent the TreeSelectionListeners to trigger when a JTree is deselected. A simple way to distinguish a selection event from a deselection one would be more than enough.

提前谢谢！

推荐答案

只需从树中获取当前选择，如果它为空，则返回.

Just get the current selection from the tree and if it's empty, return.

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