java为什么在编辑JTable单元格时按escape键时不调用CancellEditing（）？

Question

我有一个可编辑的JTable，并设置了DefaultCellEditor，如下所示：

    colModel.getColumn( 1 ).setCellEditor( new DefaultCellEditor( txtEditBox ) {
        // ...
        @Override
        public void cancelCellEditing() {
            super.cancelCellEditing();
            // handling the event
        }
        // ...
    }

但是，在编辑此列中的单元格时按escape键时，尽管编辑模式已完成，但不会调用此方法。知道为什么吗？我做错什么了吗？有没有办法处理这个问题（除了手动添加一个按键监听器）

Answer 1

我也有这个问题。我写了另一个涉及ActionListener和FocusListener的变通方法。就是这样：

public class TableEditorListenerHelper {

// dealing with events
private final EventListenerList listeners = new EventListenerList();
private ChangeEvent changeEvent;

// cell editor that we're helping
private CellEditor editor;

// transient state
private boolean editing = false;
private JTable table;

public TableEditorListenerHelper(CellEditor editor, JTextField field) {
    this.editor = editor;
    field.addActionListener(new ActionListener() {
        @Override public void actionPerformed(ActionEvent e) {
            fireEditingStopped();
        }
    });
    field.addFocusListener(new FocusListener() {

        @Override public void focusGained(FocusEvent e) {
            editing = true;
        }

        @Override public void focusLost(FocusEvent e) {
            JTable table = TableEditorListenerHelper.this.table;
            if (editing && isEditing(table)) {
                fireEditingCanceled();
            }
        }

        private boolean isEditing(JTable table) { // a hack necessary to deal with focuslist vs table repaint
            return table != null && table.isEditing();
        }

    });
}

public void setTable(JTable table) {
    this.table = table;
}

public void addCellEditorListener(CellEditorListener l) {
    listeners.add(CellEditorListener.class, l);
}

public void removeCellEditorListener(CellEditorListener l) {
    listeners.remove(CellEditorListener.class, l);
}

public CellEditorListener[] getCellEditorListeners() {
    return listeners.getListeners(CellEditorListener.class);
}

protected void fireEditingCanceled() {
    for (CellEditorListener l : getCellEditorListeners()) {
        l.editingCanceled(getOrCreateEvent());
    }
    resetEditingState();
}

protected void fireEditingStopped() {
    for (CellEditorListener l : getCellEditorListeners()) {
        l.editingStopped(getOrCreateEvent());
    }
    resetEditingState();
}

private void resetEditingState() {
    table = null;
    editing = false;
}

private ChangeEvent getOrCreateEvent() {
    return changeEvent = changeEvent == null ? new ChangeEvent(editor) : changeEvent;
}

Here你可以找到一个更完整的解决方案

Answer 2

官方方式：你可以注册一个CellEditorListener:AbstractCellEditor。addCellEditorListener（…）。如果编辑被取消，则应调用EditingCancelled（ChangeEvent e）由于太阳虫http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6788481，编辑取消未被调用：（

作为解决方法，您可以注册自己对退出密钥的操作，并自行处理。但它不适用于调整大小事件

另一个解决方案（快速而肮脏；-）：覆盖methode JTable。removeEditor（）并在超级调用后插入代码