Java 更改TableCellEditor对象的对齐方式
我已经左对齐了单元格渲染器,但如何左对齐单元格编辑器?当我编辑其中一个单元格时会发生这种情况Java 更改TableCellEditor对象的对齐方式,java,swing,jtable,Java,Swing,Jtable,我已经左对齐了单元格渲染器,但如何左对齐单元格编辑器?当我编辑其中一个单元格时会发生这种情况 import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTable; import javax.swing.JTextField; imp
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class TextPaneTest extends JFrame {
public static void main(String args[]) {
new TextPaneTest();
}
public TextPaneTest() {
// Main panel
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JTable table = new JTable() {
@Override
public TableCellEditor getCellEditor(int row, int column) {
if (column == 1)
{
////////////////////////
// What might go here //
////////////////////////
return getDefaultEditor(Boolean.class);
}
return super.getCellEditor(row, column);
}
@Override
public TableCellRenderer getCellRenderer(int row, int column) {
if (column == 1)
{
TableCellRenderer renderer = getDefaultRenderer(Boolean.class);
((JCheckBox)renderer).setHorizontalAlignment(SwingConstants.LEFT);
return renderer;
}
return super.getCellRenderer(row, column);
}
};
String[] columnNames = {"Name", "Value"};
Object[][] data = {{"one", true}, {"two", true}};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
table.setModel(model);
panel.add(table);
// Add everything to the frame
this.add(panel);
this.setSize(300, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
}
作为改变这种状况的第一步:
if (column == 1)
借
将使您的方法更加灵活(考虑5列布尔值,您不希望检查每个列的编号以返回默认渲染器/编辑器)
我还建议您从JCheckBox
扩展自己的单元渲染器,并将其设置为Boolean
类的默认单元渲染器。这将避免您在getCellRenderer()方法中更改对齐方式
注意:默认情况下,getDefaultRenderer(Boolean.class)
返回一个JCheckBox
,但是getDefaultEditor(Boolean.class)
返回一个javax.swing.JTable.BooleanEditor
,当逻辑说它也应该返回一个JCheckBox
时。因此,在某些情况下,强制转换默认渲染器可能是一个问题
我是这样做的:
JTable table = new JTable(dtm){
@Override
public TableCellEditor getCellEditor(int row, int column) {
if(getValueAt(row, column) instanceof Boolean){
return super.getDefaultEditor(Boolean.class);
}
return super.getCellEditor(row, column);
}
@Override
public TableCellRenderer getCellRenderer(int row, int column) {
if(getValueAt(row, column) instanceof Boolean){
JCheckBox cb = (JCheckBox) getDefaultRenderer(Boolean.class);
cb.setHorizontalAlignment(SwingConstants.LEFT);
return getDefaultRenderer(Boolean.class);
}
return super.getCellRenderer(row, column);
}
};
JCheckBox cb = new JCheckBox();
cb.setHorizontalAlignment(SwingConstants.LEFT);
TableCellEditor tce = new DefaultCellEditor(cb);
table.setDefaultEditor(Boolean.class, tce);
如您所见,该键从JCheckBox
开始设置为Boolean
类的默认单元格编辑器
屏幕截图
SSCCE
下面是一个完整的测试:
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class Demo {
private void initGUI(){
DefaultTableModel dtm = new DefaultTableModel(new Object[]{"Property", "Value"}, 0);
dtm.addRow(new Object[]{"Property 1", true});
dtm.addRow(new Object[]{"Property 2", false});
JTable table = new JTable(dtm){
@Override
public TableCellEditor getCellEditor(int row, int column) {
if(getValueAt(row, column) instanceof Boolean){
return super.getDefaultEditor(Boolean.class);
}
return super.getCellEditor(row, column);
}
@Override
public TableCellRenderer getCellRenderer(int row, int column) {
if(getValueAt(row, column) instanceof Boolean){
JCheckBox cb = (JCheckBox) getDefaultRenderer(Boolean.class);
cb.setHorizontalAlignment(SwingConstants.LEFT);
return getDefaultRenderer(Boolean.class);
}
return super.getCellRenderer(row, column);
}
};
JCheckBox cb = new JCheckBox();
cb.setHorizontalAlignment(SwingConstants.LEFT);
TableCellEditor tce = new DefaultCellEditor(cb);
table.setDefaultEditor(Boolean.class, tce);
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setPreferredSize(new Dimension(300,200));
JPanel content = new JPanel(new BorderLayout());
content.add(scrollPane);
JFrame frame = new JFrame("Demo");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setContentPane(content);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new Demo().initGUI();
}
});
}
}
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class Demo {
private void initGUI(){
DefaultTableModel dtm = new DefaultTableModel(new Object[]{"Property", "Value"}, 0);
dtm.addRow(new Object[]{"Property 1", true});
dtm.addRow(new Object[]{"Property 2", false});
JTable table = new JTable(dtm){
@Override
public TableCellEditor getCellEditor(int row, int column) {
if(getValueAt(row, column) instanceof Boolean){
return super.getDefaultEditor(Boolean.class);
}
return super.getCellEditor(row, column);
}
@Override
public TableCellRenderer getCellRenderer(int row, int column) {
if(getValueAt(row, column) instanceof Boolean){
JCheckBox cb = (JCheckBox) getDefaultRenderer(Boolean.class);
cb.setHorizontalAlignment(SwingConstants.LEFT);
return getDefaultRenderer(Boolean.class);
}
return super.getCellRenderer(row, column);
}
};
JCheckBox cb = new JCheckBox();
cb.setHorizontalAlignment(SwingConstants.LEFT);
TableCellEditor tce = new DefaultCellEditor(cb);
table.setDefaultEditor(Boolean.class, tce);
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setPreferredSize(new Dimension(300,200));
JPanel content = new JPanel(new BorderLayout());
content.add(scrollPane);
JFrame frame = new JFrame("Demo");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setContentPane(content);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new Demo().initGUI();
}
});
}
}