Question

我在设置JComboBox时遇到了问题。在separte面板上为用户提供了一些选项，用于确定是否应该启用/禁用JComboBox - 我遇到的问题是，即使禁用了JComboBox，用户仍然可以从JComboBox中进行选择（因为组合框是灰色的，所以它被禁用）！ JComboBox使用自定义TableCellRenderer和自定义DefaultCellEditor。此外，JComboBox是JTable行中的单元格/列。

所以这是代码的细分：

* JTable的prepareRenderer *

public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
    JComponent component = (JComponent) super.prepareRenderer(renderer, row, column);
       //Code which checks to see if component should be enabled
       enableComponent = false;
       component.setEnabled(enableComponent);
    }

*设置组合框*

public void setupUserCombo(){

       TableColumn col = getColumnModel().getColumn(0);
           List<String> comboUsers = new String["Adam", "Ben"]

    MyComboBoxRenderer jComboBox = (new MyComboBoxRenderer((String[])values.toArray(comboUsers ));
    col.setCellEditor(new MyComboBoxEditor((String[])values.toArray(new String[0])));
    col.setCellRenderer(jComboBox);

    repaint();
}

* TableCellRenderer *

    public class MyComboBoxRenderer extends JComboBox implements TableCellRenderer {
    private static final long serialVersionUID = 1L;

    public MyComboBoxRenderer(String[] items) {
        super(items);
        repaint();
    }

    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        setSelectedItem("");

        if (isSelected) {
            super.setBackground(table.getSelectionBackground());
        } else {
            setForeground(table.getForeground());
            setBackground(table.getBackground());
        }

        setSelectedItem(value);

        return this;
    }

}

* DefaultCellEditor *

    public class MyComboBoxEditor extends DefaultCellEditor {
        private static final long serialVersionUID = 1L;

    public MyComboBoxEditor(String[] items) {
        super(new JComboBox(items));
    }
}

任何关于我做错什么的指示都会非常感激!!

谢谢，

Answer 1

请参阅JTable tutorial了解Using a Combo Box as an Editor
view by @aterai
不要将JComponents存储在XxxTableModel中，然后JComboBox中的最后一个选定值存储在XxxTableModel中String value

Answer 2

如果要禁用表格中单元格的版本，则应覆盖TableModel.isCellEditable(int,int)

这里你要做的就是渲染一个禁用的JComboBox，但这不会阻止编辑，它只是渲染一个禁用的JComboBox。另请参阅http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#editrender

禁用后仍可以从JComboBox中选择

2 个答案: