如何在cellchange上进行JTable选择所有文本

Question

我已经看到了一些这样做的例子，但我仍然不明白，也无法实现。

我想做的是在单元格更改（焦点）上，下一个选定的单元格将选择所有文本，以供用户完全更改它。

关于如何做的任何想法？

// update //不知何故我设法完成了以下课程，但

实现此
tblLayers.setDefaultEditor（String.class，new Classes.CellEditor（））;

不会产生任何结果，即“尚不支持”。不抛出..

我应该如何解决这个问题？

import java.awt.Component;
import java.util.EventObject;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.event.CellEditorListener;
import javax.swing.table.TableCellEditor;


public class CellEditor extends JTextField implements TableCellEditor {


public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
    //        final JTextField ec = (JTextField) editorComponent;
    //
    //        ec.setText((String) value);
    //
    //        // selectAll, so that whatever the user types replaces what we just put there
    //        ec.selectAll();
    //
    //        SwingUtilities.invokeLater(new Runnable() {
    //
    //            public void run() {
    //                // make the component take the keyboard focus, so the backspace key works
    //                ec.requestFocus();
    //
    //                SwingUtilities.invokeLater(new Runnable() {
    //
    //                    public void run() {
    //                        // at this point the user has typed something into the cell and we
    //                        // want the caret to be AFTER that character, so that the next one
    //                        // comes in on the RHS
    //                        ec.setCaretPosition(ec.getText().length());
    //                    }
    //                });
    //            }
    //        });
    //        return editorComponent;


    throw new UnsupportedOperationException("Not supported yet.");
}

public Object getCellEditorValue() {
    throw new UnsupportedOperationException("Not supported yet.");
}

public boolean isCellEditable(EventObject anEvent) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public boolean shouldSelectCell(EventObject anEvent) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public boolean stopCellEditing() {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void cancelCellEditing() {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void addCellEditorListener(CellEditorListener l) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void removeCellEditorListener(CellEditorListener l) {
    throw new UnsupportedOperationException("Not supported yet.");
}
}

Answer 1

关于editorComponent，我该在哪里初始化此变量？

变量editorComponent是的字段DefaultCellEditor。

代替

class CellEditor extends JTextField implements TableCellEditor

考虑

class CellEditor extends DefaultCellEditor

然后，您可以执行以下操作：

@Override
public Component getTableCellEditorComponent(JTable table,
        Object value, boolean isSelected, int row, int column) {
    JTextField ec = (JTextField) editorComponent;
    if (isSelected) {
        ec.selectAll();
    }
    return editorComponent;
}

附录：如@
Edoz所建议，并在此完整示例中进行了说明，您可以selectAll()在鼠标单击启动编辑时有选择地重新排队。

JTable table = new JTable(model) {

    @Override // Always selectAll()
    public boolean editCellAt(int row, int column, EventObject e) {
        boolean result = super.editCellAt(row, column, e);
        final Component editor = getEditorComponent();
        if (editor == null || !(editor instanceof JTextComponent)) {
            return result;
        }
        if (e instanceof MouseEvent) {
            EventQueue.invokeLater(() -> {
                ((JTextComponent) editor).selectAll();
            });
        } else {
            ((JTextComponent) editor).selectAll();
        }
        return result;
    }
};