我有一列JTable，我设置了一个自定义TableCellRenderer，在JPanel方法中返回自定义getTableCellRendererComponent。
自定义JPanel包含多个JTextField和JButton，并且只创建了一个自定义JPanel的实例，并且在我设置的getTableCellRendererComponent方法中来自数据模型对象的JTextField值。
为了使JTextFiel可编辑且JButton可点击，我必须将isCellEditable方法从JTable模型设置为true，并创建一个实现{{ 1}} TableCellEditor为true，并设置isCellEditable的默认单元格编辑器。
我想在点击自定义JTable的某些按钮时获取表格选定行，但它总是返回-1。如果我将ListSelectionListener添加到JTable，它甚至在单击一行时不会调用valueChanged方法。如果我删除单元格编辑器，它正常工作。如果将单元格编辑器添加到JPanel，为什么ListSelectionListener不起作用？为什么我需要提供单元格编辑器？来自JTable模型的isCellEditable还不够吗？
答案 0 :(得分：3)
SSCCE例如
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.table.*;
public class PanelInTable {
private JFrame frame;
private JTable CompTable = null;
private PanelTableModel CompModel = null;
private JButton addButton = null;
public static void main(String args[]) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
//UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception fail) {
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new PanelInTable().makeUI();
}
});
}
public void makeUI() {
CompTable = CreateCompTable();
JScrollPane CompTableScrollpane = new JScrollPane(CompTable, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
JPanel bottomPanel = CreateBottomPanel();
frame = new JFrame("Comp Table Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(CompTableScrollpane, BorderLayout.CENTER);
frame.add(bottomPanel, BorderLayout.SOUTH);
frame.setPreferredSize(new Dimension(800, 400));
frame.setLocation(150, 150);
frame.pack();
frame.setVisible(true);
}
public JTable CreateCompTable() {
CompModel = new PanelTableModel();
CompModel.addRow();
JTable table = new JTable(CompModel);
table.setRowHeight(new CompCellPanel().getPreferredSize().height);
table.setTableHeader(null);
PanelCellEditorRenderer PanelCellEditorRenderer = new PanelCellEditorRenderer();
table.setDefaultRenderer(Object.class, PanelCellEditorRenderer);
table.setDefaultEditor(Object.class, PanelCellEditorRenderer);
return table;
}
public JPanel CreateBottomPanel() {
addButton = new JButton("Add Comp");
addButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if (source == addButton) {
CompModel.addRow();
}
}
});
JPanel panel = new JPanel(new GridBagLayout());
panel.add(addButton);
return panel;
}
}
class PanelCellEditorRenderer extends AbstractCellEditor implements TableCellRenderer, TableCellEditor {
private static final long serialVersionUID = 1L;
private CompCellPanel renderer = new CompCellPanel();
private CompCellPanel editor = new CompCellPanel();
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
renderer.setComp((Comp) value);
return renderer;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
editor.setComp((Comp) value);
return editor;
}
@Override
public Object getCellEditorValue() {
return editor.getComp();
}
@Override
public boolean isCellEditable(EventObject anEvent) {
return true;
}
@Override
public boolean shouldSelectCell(EventObject anEvent) {
return false;
}
}
class PanelTableModel extends DefaultTableModel {
private static final long serialVersionUID = 1L;
@Override
public int getColumnCount() {
return 1;
}
public void addRow() {
super.addRow(new Object[]{new Comp(0, 0, "", "")});
}
}
class Comp {
public int type;
public int relation;
public String lower;
public String upper;
public Comp(int type, int relation, String lower, String upper) {
this.type = type;
this.relation = relation;
this.lower = lower;
this.upper = upper;
}
}
class CompCellPanel extends JPanel {
private static final long serialVersionUID = 1L;
private JLabel labelWith = new JLabel("With ");
private JComboBox typeCombo = new JComboBox(new Object[]{"height", "length", "volume"});
private JComboBox relationCombo = new JComboBox(new Object[]{"above", "below", "between"});
private JTextField lowerField = new JTextField();
private JLabel labelAnd = new JLabel(" and ");
private JTextField upperField = new JTextField();
private JButton removeButton = new JButton("remove");
CompCellPanel() {
setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
relationCombo.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
enableUpper(relationCombo.getSelectedIndex() == 2);
}
});
enableUpper(false);
removeButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JTable table = (JTable) SwingUtilities.getAncestorOfClass(JTable.class, (Component) e.getSource());
int row = table.getEditingRow();
table.getCellEditor().stopCellEditing();
((DefaultTableModel) table.getModel()).removeRow(row);
}
});
add(labelWith);
add(typeCombo);
add(relationCombo);
add(lowerField);
add(labelAnd);
add(upperField);
add(Box.createHorizontalStrut(100));
add(removeButton);
}
private void enableUpper(boolean enable) {
labelAnd.setEnabled(enable);
upperField.setEnabled(enable);
}
public void setComp(Comp Comp) {
typeCombo.setSelectedIndex(Comp.type);
relationCombo.setSelectedIndex(Comp.relation);
lowerField.setText(Comp.lower);
upperField.setText(Comp.upper);
enableUpper(Comp.relation == 2);
}
public Comp getComp() {
return new Comp(typeCombo.getSelectedIndex(), relationCombo.getSelectedIndex(), lowerField.getText(), upperField.getText());
}
}
答案 1 :(得分：0)
为什么需要在编辑器中选择单元格？
是否足以让您知道当前正在编辑的行和列？
如果是，那么只需将它们设置在您设置编辑器值的位置
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
renderer.setComp((Comp) value, row, column );
return renderer;
}