我想使用 JComboBox 作为 JXTreeTable 中的单元格编辑器.它适用于标准 DefaultCellEditor(即 开始点击次数 等于 2)。

现在我希望只需单击一次 即可编辑该列。所以我在我的代码中添加了一个 cellEditor.setClickCountToStart(1); 语句。

这是我的 SSCCE :

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import org.jdesktop.swingx.JXTreeTable;
import org.jdesktop.swingx.treetable.DefaultMutableTreeTableNode;
import org.jdesktop.swingx.treetable.DefaultTreeTableModel;

public class TestCellEditorForJXTreeTable {

    /** The JXTreeTable */
    JXTreeTable treeTable;
    /** The model */
    DefaultTreeTableModel treeTableModel;

    /** Constructor */
    public TestCellEditorForJXTreeTable() {

        treeTable = new JXTreeTable();
        treeTableModel = new DefaultTreeTableModel() {
            @Override
            public String getColumnName(int column) {
                switch (column) {
                    case 0:
                        return "A";
                    case 1:
                        return "B";
                }
                return null;
            }
            @Override
            public Object getValueAt(Object node, int column) {
                switch (column) {
                    case 0:
                        return ((DefaultMutableTreeTableNode) node).getUserObject();
                    case 1:
                        return "Value in B";
                }
                return null;
            }
            @Override
            public int getColumnCount() {
                return 2;
            }
            @Override
            public boolean isCellEditable(Object node, int column) {
                return column == 1;
            }
        };
        treeTable.setTreeTableModel(treeTableModel);

    }

    public static void main(String[] args) {
        TestCellEditorForJXTreeTable test = new TestCellEditorForJXTreeTable();

        // Root node
        DefaultMutableTreeTableNode root = new DefaultMutableTreeTableNode("root");
        test.treeTableModel.setRoot(root);

        // New nodes/rows
        DefaultMutableTreeTableNode node = new DefaultMutableTreeTableNode("child_node");
        test.treeTableModel.insertNodeInto(node, root, 0);
        DefaultMutableTreeTableNode node2 = new DefaultMutableTreeTableNode("child_node2");
        test.treeTableModel.insertNodeInto(node2, root, 1);

        // Showing the frame
        showTable(test.treeTable);

        // Setting the cell editor
        DefaultCellEditor cellEditor = new DefaultCellEditor(new JComboBox(new String[]{"1", "2", "3"}));
        cellEditor.setClickCountToStart(1);
        test.treeTable.getColumn(1).setCellEditor(cellEditor);

    }

    /** Shows a JXTreeTable in a frame */
    private static void showTable(JXTreeTable table) {
        JFrame frame = new JFrame("Testing cell editor for JXTreeTable");
        frame.setPreferredSize(new Dimension(640, 480));
        frame.setLayout(new BorderLayout());
        frame.add(table, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

但是现在看起来很丑:

当我点击一个可编辑的单元格时，它会打开 JComboBox 弹出菜单(太棒了!这正是我所期待的!)，但是这个弹出菜单立即关闭(< em="">Erf!)。它闪烁。我必须在选定的单元格上再次单击才能最终打开它。

每次我在可编辑列中选择另一个单元格时，问题都会重复。

如何才能在第一次单击后真正打开 JComboBox 弹出菜单？

谢谢。

编辑 2014-01-24

这里是同一个例子，但是使用了 JTable。 JComboBox 弹出菜单不会闪烁。

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class TestCellEditorForJTable {

    /** The JTable */
    JTable table;
    /** The model */
    DefaultTableModel tableModel;

    /** Constructor */
    public TestCellEditorForJTable() {
        table = new JTable();
        tableModel = new DefaultTableModel(new String[] {"A", "B"}, 0) {
            @Override
            public boolean isCellEditable(int row, int column) {
                return column == 1;
            }
        };
        table.setModel(tableModel);

    }

    public static void main(String[] args) {
        TestCellEditorForJTable test = new TestCellEditorForJTable();

        // New rows
        test.tableModel.insertRow(0, new String[] {"Value1 in A", "Value1 in B"});
        test.tableModel.insertRow(1, new String[] {"Value2 in A", "Value2 in B"});

        // Showing the frame
        showTable(test.table);

        // Setting the cell editor
        DefaultCellEditor cellEditor = new DefaultCellEditor(new JComboBox(new String[]{"1", "2", "3"}));
        cellEditor.setClickCountToStart(1);
        test.table.getColumnModel().getColumn(1).setCellEditor(cellEditor);

    }

    /** Shows a table in a frame */
    private static void showTable(JTable table) {
        JFrame frame = new JFrame("Testing cell editor for JTable");
        frame.setPreferredSize(new Dimension(640, 480));
        frame.setLayout(new BorderLayout());
        frame.add(table, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

我忘了说我使用的是 Java 1.6。

编辑2014-01-24(2)

使用 kleopatra's answer 的 ContainerListener 和 FocusListener ，并运行相同的执行流程，我通过 JXTreeTable SSCCE 获得以下输出:

// first click
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$2 componentAdded
INFO: java.awt.event.ContainerEvent[COMPONENT_ADDED...JXTreeTable...
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$3 focusGained
INFO: java.awt.FocusEvent[FOCUS_GAINED...JXTreeTable...
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$2 componentRemoved
INFO: java.awt.event.ContainerEvent[COMPONENT_REMOVED...JXTreeTable...
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$3 focusLost
INFO: java.awt.FocusEvent[FOCUS_LOST...JXTreeTable...

// second click
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$2 componentAdded
INFO: java.awt.event.ContainerEvent[COMPONENT_ADDED...JXTreeTable...
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$3 focusGained
INFO: java.awt.FocusEvent[FOCUS_GAINED...JXTreeTable...
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$2 componentRemoved
INFO: java.awt.event.ContainerEvent[COMPONENT_REMOVED...JXTreeTable...
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$3 focusLost
INFO: java.awt.FocusEvent[FOCUS_LOST...JXTreeTable...

最佳答案

Tricky bugger - 我认为这确实是一个核心问题。

让我们首先准确定义它发生了什么/什么时候发生:以普通表格为例(顺便说一句:+1 表示漂亮简洁的 SSCCE!)

• 运行
• 点击单元格 (1, 1)，即最后一行，第二列:表格开始编辑，显示组合的弹出窗口
• 仍在编辑时(请注意，不要点击中间的任何其他地方很重要)，点击单元格 (0, 1):表格开始编辑该单元格，组合的弹出窗口被隐藏

挖掘揭示了可能的原因:它是一个无序的 focusLost 收到之后组合被再次添加为编辑组件。要查看，请将 containerListener 注册到表，将 focusListener 注册到组合并打印事件

ContainerListener containerL = new ContainerListener() {

    @Override
    public void componentRemoved(ContainerEvent e) {
        LOG.info("" + e);
    }

    @Override
    public void componentAdded(ContainerEvent e) {
        LOG.info("" + e);
    }
};
table.addContainerListener(containerL);
FocusListener focusL = new FocusListener() {

    @Override
    public void focusGained(FocusEvent e) {
        LOG.info("" + e);
       // following line is a hack around: force the popup open
       // ((JComboBox) cellEditor.getComponent()).setPopupVisible(true);
    }

    @Override
    public void focusLost(FocusEvent e) {
        LOG.info("" + e);
    }

};
cellEditor.getComponent().addFocusListener(focusL);

输出:

// first click
24.01.2014 12:13:44 org.jdesktop.swingx.table.TestCellEditorForJTable$2 componentAdded
INFO: java.awt.event.ContainerEvent[COMPONENT_ADDED,child=null] on javax.swing.JTable...
24.01.2014 12:13:44 org.jdesktop.swingx.table.TestCellEditorForJTable$3 focusGained
INFO: java.awt.FocusEvent[FOCUS_GAINED,permanent,opposite=javax.swing.JTable

// second click
24.01.2014 12:13:49 org.jdesktop.swingx.table.TestCellEditorForJTable$2 componentRemoved
INFO: java.awt.event.ContainerEvent[COMPONENT_REMOVED,child=null] on javax.swing.JTable
24.01.2014 12:13:49 org.jdesktop.swingx.table.TestCellEditorForJTable$2 componentAdded
INFO: java.awt.event.ContainerEvent[COMPONENT_ADDED,child=null] on javax.swing.JTable
// here's the problem: focusLost _after_ added again
24.01.2014 12:13:49 org.jdesktop.swingx.table.TestCellEditorForJTable$3 focusLost
INFO: java.awt.FocusEvent[FOCUS_LOST,permanent,opposite=javax.swing.JTable
24.01.2014 12:13:49 org.jdesktop.swingx.table.TestCellEditorForJTable$3 focusGained
INFO: java.awt.FocusEvent[FOCUS_GAINED,permanent,opposite=javax.swing.JTable

一个快速的 hack 可能是强制在 focusListener 中打开弹出窗口。不过，没有检查副作用。

关于java - 如何仅单击一次鼠标即可编辑 JXTreeTable 单元格？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21309528/