如何通过单击编辑JTree节点 [英] How to edit a JTree node with a single-click

问题描述

我有一个 JTree ，并希望在我单击时调用其 getTreeCellEditorComponent（）方法在一个节点上。根据 DefaultTreeCellEditor 类（我扩展）的文档，点击三次鼠标，或点击，暂停，点击和延迟1200后开始编辑毫秒。有没有办法覆盖这种行为，以便单击可以开始编辑过程？

I have a JTree, and would like for its getTreeCellEditorComponent() method to be invoked when I single click on a node. According to the documentation for the DefaultTreeCellEditor class (which I extended), "Editing is started on a triple mouse click, or after a click, pause, click and a delay of 1200 miliseconds." Is there some way to override this behavior, so that a single-click could start the editing process?

推荐答案

JTree API建议使用 MouseListener ，但是键绑定也很方便。此示例调用 startEditingAtPath（）并绑定到Enter键：

The JTree API recommends a MouseListener, but a key binding is also handy. This example invokes startEditingAtPath() and binds to the Enter key:

final JTree tree = new JTree();
tree.setEditable(true);
MouseListener ml = new MouseAdapter() {
    @Override
    public void mousePressed(MouseEvent e) {
        int row = tree.getRowForLocation(e.getX(), e.getY());
        TreePath path = tree.getPathForLocation(e.getX(), e.getY());
        if (row != -1) {
            if (e.getClickCount() == 1) {
                tree.startEditingAtPath(path);
            }
        }
    }
};
tree.addMouseListener(ml);
tree.getInputMap().put(
    KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "startEditing");

附录：另见回答关于可用性。

Addendum: See also this answer regarding usability.

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