Question

我有一个JTree和一个JtextField，所以我在文本字段中添加了侦听器，这样，如果我按Enter键，该节点将使用在该字段中输入的名称进行更新。

这很好，当我使用自定义的DefaultTreeCellRenderer渲染禁用的节点时会出现问题。此后，我必须手动单击该节点以查看更改的出现。

我确实尝试过reload（），nodeChanged（），但没有任何变化。

JTree面板：


  public class RuleTree extends JPanel {
    private static JTree autoscoreRuleTree;
    private static DefaultTreeModel treeModel;


renameRule(){
    /*
        Code given below
    */
}

newRule(){
    /*
        Creates a new rule
    */
}

copyRule(){
    /*
        Copies a rule
    */
}

disableRule(){
    /*
        disables a rule codee given below
    */
}

文本字段类：

public class RuleNamePanel extends JPanel {
    private static JLabel ruleName;
    private static JTextField ruleNameTextField;

    /* To rename on pressing enter*/
            ruleNameTextField.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    RuleTree.renameRule(ruleNameTextField.getText());
                }
            }
        });

渲染类：（规则是自定义类）

public class AutoScoreRuleTreeRenderer extends DefaultTreeCellRenderer {
    @Override
    public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean exp, boolean leaf,
            int row, boolean hasFocus) {
        super.getTreeCellRendererComponent(tree, value, sel, exp, leaf, row, hasFocus);
        Rule rule = (Rule) ((DefaultMutableTreeNode) value).getUserObject();
        this.setEnabled(rule.isActivated());

        return this;
    }

}

当我在文本字段上按Enter键时，就会调用此名称

public static void renameRule(String name) {
        TreePath nodeToRename = autoscoreRuleTree.getSelectionPath();
        DefaultMutableTreeNode node = (DefaultMutableTreeNode) nodeToRename.getLastPathComponent();
        Rule rule = (Rule) node.getUserObject();
        rule.setName(name);
        treeModel.nodeChanged(node);
    }

按钮面板

public class RuleModifyButtonPanel extends JPanel {

    private JButton newRuleButton;
    private JButton newChildButton;
    private JButton duplicateRuleButton;
    private JButton cutRuleButton;
    private JButton pasteRuleButton;
    private JButton disableRuleButton;

    /*
    Each button calls a method when clicked
    */

        //When disable button is pressed this will internally call enableNode method
        disableRuleButton.addActionListener(e -> RuleTree.disableRule()); 

    }

禁用节点方法

    private static void enableNodes(DefaultMutableTreeNode node, boolean enable) {
        autoscoreRuleTree.setCellRenderer(new AutoScoreRuleTreeRenderer());
        enablePanels(enable);
        Rule rule = (Rule) node.getUserObject();
    }

预期会在输入时更改，但是当我手动单击树时会更改。

在使用渲染之前： Enter the name> Pressed Enter

使用渲染后： Enter the name after render> Press Enter> Click manually

使用自定义的DefaultTreeCellRenderer

0 个答案: