Question

我想在我的应用程序中的任何位置触发保存操作（Control + S）。我添加了必要的键绑定，操作按预期触发。但是，如果我在JTable上尝试Control + S，该表将启动我的自定义操作并激活表格单元格进行编辑。我想我已经在表的输入映射中禁用了编辑操作。我在这里缺少什么？

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.KeyStroke;
import javax.swing.UIManager;

public class TestTableKeyBinding extends JFrame{

JTable table;
JScrollPane scroll;

public static void main(String[] args){
    TestTableKeyBinding test = new TestTableKeyBinding();
    test.setVisible(true);
}

TestTableKeyBinding(){
    super();
    initUI();
    addKeyBindings();
}

void initUI(){
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String[] headers = new String[]{"apples", "bananas"};
    String[][] data = new String[][]{{"1", "2"},{"4","6"}};
    table = new JTable(data, headers);
    table.setCellSelectionEnabled(true);
    scroll = new JScrollPane();
    scroll.setViewportView(table);
    this.add(scroll);
    this.pack();
    this.setSize(new Dimension(300, 400));  

}

void addKeyBindings(){
    //root maps
    InputMap im = this.getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    ActionMap am = this.getRootPane().getActionMap();

    //add custom action
    im.put(KeyStroke.getKeyStroke("control S"), "save");
    am.put("save", saveAction());

    //disable table actions via 'none'
    table.getInputMap().put(KeyStroke.getKeyStroke("control S"), "none");
    table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("control S"), "none");
    table.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("control S"), "none");
    table.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("control S"), "none");
    ((InputMap)UIManager.get("Table.ancestorInputMap")).put(KeyStroke.getKeyStroke("control S"), "none");
}

AbstractAction saveAction(){
    AbstractAction save = new AbstractAction(){
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
               JOptionPane.showMessageDialog(TestTableKeyBinding.this.table, "Action Triggered.");
        }           
    };
        return save;
    }   
}

Answer 1

与@Guillaume一样，我运行代码没有问题。您可能会找到CellEditor无意中击败editingStopped()，讨论here。 sscce可能有助于澄清问题。

附录：您可以在saveAction()处理程序中取消编辑，如下所示。

table.editingCanceled(null);

作为参考，我已在几个方面更新了您的示例：

Control-S 未绑定到任何JTable Action共同的Look＆amp;感觉实现，所以不需要remove它。
为了跨平台方便，请使用getMenuShortcutKeyMask()。
应在event dispatch thread上构建和操作仅的Swing GUI对象。

代码：

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.KeyStroke;

public class TestTableKeyBinding extends JFrame {

    private static final int MASK =
        Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
    private JTable table;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                TestTableKeyBinding test = new TestTableKeyBinding();
                test.setVisible(true);
            }
        });
    }

    TestTableKeyBinding() {
        super();
        initUI();
        addKeyBindings();
    }

    private void initUI() {
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        String[] headers = new String[]{"apples", "bananas"};
        String[][] data = new String[][]{{"1", "2"}, {"4", "6"}};
        table = new JTable(data, headers);
        table.setCellSelectionEnabled(true);
        this.add(new JScrollPane(table));
        this.pack();
        this.setSize(new Dimension(300, 400));

    }

    private void addKeyBindings() {
        //root maps
        InputMap im = this.getRootPane().getInputMap(
            JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
        ActionMap am = this.getRootPane().getActionMap();
        //add custom action
        im.put(KeyStroke.getKeyStroke(KeyEvent.VK_S, MASK), "save");
        am.put("save", saveAction());
    }

    private AbstractAction saveAction() {
        AbstractAction save = new AbstractAction() {

            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(
                    TestTableKeyBinding.this.table, "Action Triggered.");
                table.editingCanceled(null);
            }
        };
        return save;
    }
}

Answer 2

我终于明白了。没有设置键绑定，动作映射不存在。所以对put的调用没有做任何事情。

table.getInputMap().put(KeyStroke.getKeyStroke("control S"), "none");
table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("control S"), "none");
table.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("control S"), "none");
table.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("control S"), "none");
((InputMap)UIManager.get("Table.ancestorInputMap")).put(KeyStroke.getKeyStroke("control S"), "none");

JTable通过触发表来启用编辑，将键事件传递给editCellAt。有两种方法可以解决这个问题。 1）向JTable的输入/动作映射添加动作引用，或者2）覆盖editCellAt以返回false。以下是我解决这个问题的方法。

public boolean editCellAt(int row, int column, EventObject e){              
            if(e instanceof KeyEvent){
                int i = ((KeyEvent) e).getModifiers();
                String s = KeyEvent.getModifiersExText(((KeyEvent) e).getModifiers());
                //any time Control is used, disable cell editing            
                if(i == InputEvent.CTRL_MASK){
                    return false;
                }
            }               
            return super.editCellAt(row, column, e);                
        }

JTable密钥绑定

2 个答案: