我有一个 JTree 显示我自己的 TreeModel。 TreeModel 是从数据库“按需”加载的（有点难看，因为部分是在 EDT 上完成的，但这不是我的问题）。有一个菜单允许用户选择要应用于树的过滤器。
更改过滤器时，TreeModel 可能会隐藏节点，或者可能会显示新节点。这就是我的问题所在 - 我看不到从模型生成适当的 treeStructureChanged 事件的合理方法，因为我不知道哪些节点真正发生了变化。似乎没有简单的方法可以告诉听众整个模型现在（可能）不同了。
有没有一种简单的方法告诉所有 TreeModelListeners 整个模型已更改？ （当然我想尽可能保留选择/扩展状态）。
I have a JTree displaying my own TreeModel. The TreeModel is loaded "on demand" from a database (somewhat ugly since partially done on the EDT, but thats not my issue here). There is a menu which will allow the user to select a filter to be applied to the tree.
When changing the filter, nodes may be hidden by the TreeModel or new nodes may be revealed. This is where my problem lies - I see no reasonable way of generating the appropiate treeStructureChanged events from the model, since I have no idea which nodes really have changed. There seems to be no simple way of telling the listeners that the entire model is now (potentially) different.
Is there a simple way of telling all TreeModelListeners that the entire model has been changed? (Of course I want to retain selection/expansion state as far as possible).
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因为您想要表明整个树结构已更改，所以发送如何使用树：创建数据模型< /a>.
TreeModelEvent用于每个侦听器的树根。GenealogyModel方法fireTreeStructureChanged()是Because you want to signal that the entire tree structure has changed, send a
TreeModelEventfor the tree's root to each listener. TheGenealogyModelmethodfireTreeStructureChanged()is an example mentioned in How to Use Trees: Creating a Data Model.