JTable 更改列顺序然后编辑单元格引发错误
JTable changing column order and then editing cell raising bug
我对 JTable 有一个奇怪的问题。
- 我有什么
一个两列的 JTable。第二列使用JComboBox作为单元格编辑器。
- 问题
当我使用原始列顺序编辑 JComboBox 单元格时,它工作正常。 但是当我先更改列时,例如切换第 2 列(JComboBox 列变成拳头),然后我编辑 JComboBox 单元格引发 Bug。 我必须单击该单元格两次才能触发编辑事件,否则,JComboBox 不会被激活。
- 我试过的
我尝试使用 TableCellListener,但它引发了异常,例如列索引为 -1;
我的 SSCCE:
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.AbstractAction;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import java.awt.GridLayout;
import javax.swing.JTable;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JScrollPane;
public class MainTable extends JDialog {
private static final long serialVersionUID = 156332386872772726L;
private final JPanel contentPanel = new JPanel();
private DefaultTableModel tableModel;
private JTable table;
public static void main(String[] args) {
try {
MainTable dialog = new MainTable();
dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
dialog.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
public MainTable() {
setBounds(100, 100, 450, 300);
getContentPane().setLayout(new BorderLayout());
contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
getContentPane().add(contentPanel, BorderLayout.CENTER);
contentPanel.setLayout(new GridLayout(1, 0, 0, 0));
{
JScrollPane scrollPane = new JScrollPane();
contentPanel.add(scrollPane);
{
table = new JTable();
table.setAutoCreateRowSorter(true);
tableModel = new DefaultTableModel(new String[]{"first","second"},0);
table.setModel(tableModel);
{
//set comboBox to table
JComboBox<String> comboBox = new JComboBox<String>();
comboBox.addItem("Input");
comboBox.addItem("Output");
table.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(comboBox));
table.getColumnModel().addColumnModelListener(new TableColumnModelListener(){
@Override
public void columnAdded(TableColumnModelEvent arg0) {
}
@Override
public void columnMarginChanged(ChangeEvent arg0) {
}
@Override
public void columnMoved(TableColumnModelEvent arg0) {
table.requestFocusInWindow();
comboBox.setFocusable(true);
comboBox.requestFocus();
comboBox.grabFocus();
comboBox.requestFocusInWindow();//try to get focus, not worked.
}
@Override
public void columnRemoved(TableColumnModelEvent arg0) {
}
@Override
public void columnSelectionChanged(ListSelectionEvent arg0) {
}
});
}
// TableCellListener tcl = new TableCellListener(table, new AbstractAction(){
// @Override
// public void actionPerformed(ActionEvent e) {
// }
// });
tableModel.addRow(new Object[]{"1","Input"});
tableModel.addRow(new Object[]{"2","Output"});//init. add 2 rows
scrollPane.setViewportView(table);
}
}
{
JPanel buttonPane = new JPanel();
buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
getContentPane().add(buttonPane, BorderLayout.SOUTH);
{
JButton okButton = new JButton("Add");
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
int row = tableModel.getRowCount();
tableModel.addRow(new Object[]{row,"Input"});//click button to add a row
}
});
buttonPane.add(okButton);
getRootPane().setDefaultButton(okButton);
}
}
}
}
I must click that cell twice to fire the editing event, otherwise, JComboBox isn't activated.
这只会在您更改列顺序后第一次尝试编辑列时发生。如果您将列切换回其原始位置,也会发生这种情况。
这就像 table 没有焦点,所以第一次鼠标点击给予 table 焦点。
因此您可以尝试在 TableColumModel
中添加一个 TableColumnModelListener
。然后在 columnMoved
事件中你可以尝试使用 table.requestFocusInWindow()
我对 JTable 有一个奇怪的问题。
- 我有什么
一个两列的 JTable。第二列使用JComboBox作为单元格编辑器。
- 问题
当我使用原始列顺序编辑 JComboBox 单元格时,它工作正常。 但是当我先更改列时,例如切换第 2 列(JComboBox 列变成拳头),然后我编辑 JComboBox 单元格引发 Bug。 我必须单击该单元格两次才能触发编辑事件,否则,JComboBox 不会被激活。
- 我试过的
我尝试使用 TableCellListener,但它引发了异常,例如列索引为 -1;
我的 SSCCE:
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.AbstractAction;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import java.awt.GridLayout;
import javax.swing.JTable;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JScrollPane;
public class MainTable extends JDialog {
private static final long serialVersionUID = 156332386872772726L;
private final JPanel contentPanel = new JPanel();
private DefaultTableModel tableModel;
private JTable table;
public static void main(String[] args) {
try {
MainTable dialog = new MainTable();
dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
dialog.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
public MainTable() {
setBounds(100, 100, 450, 300);
getContentPane().setLayout(new BorderLayout());
contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
getContentPane().add(contentPanel, BorderLayout.CENTER);
contentPanel.setLayout(new GridLayout(1, 0, 0, 0));
{
JScrollPane scrollPane = new JScrollPane();
contentPanel.add(scrollPane);
{
table = new JTable();
table.setAutoCreateRowSorter(true);
tableModel = new DefaultTableModel(new String[]{"first","second"},0);
table.setModel(tableModel);
{
//set comboBox to table
JComboBox<String> comboBox = new JComboBox<String>();
comboBox.addItem("Input");
comboBox.addItem("Output");
table.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(comboBox));
table.getColumnModel().addColumnModelListener(new TableColumnModelListener(){
@Override
public void columnAdded(TableColumnModelEvent arg0) {
}
@Override
public void columnMarginChanged(ChangeEvent arg0) {
}
@Override
public void columnMoved(TableColumnModelEvent arg0) {
table.requestFocusInWindow();
comboBox.setFocusable(true);
comboBox.requestFocus();
comboBox.grabFocus();
comboBox.requestFocusInWindow();//try to get focus, not worked.
}
@Override
public void columnRemoved(TableColumnModelEvent arg0) {
}
@Override
public void columnSelectionChanged(ListSelectionEvent arg0) {
}
});
}
// TableCellListener tcl = new TableCellListener(table, new AbstractAction(){
// @Override
// public void actionPerformed(ActionEvent e) {
// }
// });
tableModel.addRow(new Object[]{"1","Input"});
tableModel.addRow(new Object[]{"2","Output"});//init. add 2 rows
scrollPane.setViewportView(table);
}
}
{
JPanel buttonPane = new JPanel();
buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
getContentPane().add(buttonPane, BorderLayout.SOUTH);
{
JButton okButton = new JButton("Add");
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
int row = tableModel.getRowCount();
tableModel.addRow(new Object[]{row,"Input"});//click button to add a row
}
});
buttonPane.add(okButton);
getRootPane().setDefaultButton(okButton);
}
}
}
}
I must click that cell twice to fire the editing event, otherwise, JComboBox isn't activated.
这只会在您更改列顺序后第一次尝试编辑列时发生。如果您将列切换回其原始位置,也会发生这种情况。
这就像 table 没有焦点,所以第一次鼠标点击给予 table 焦点。
因此您可以尝试在 TableColumModel
中添加一个 TableColumnModelListener
。然后在 columnMoved
事件中你可以尝试使用 table.requestFocusInWindow()