我左对齐了我的单元格渲染器,但是如何左对齐我的单元格编辑器?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;
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);
}
}
答案 0 :(得分:3)
作为改变这一条件的第一步:
if (column == 1)
通过
if(getValueAt(row, column) instanceof Boolean)
将使您的方法更灵活(考虑使用布尔值的5列,您不希望检查每个列号以返回默认的渲染器/编辑器。)
我还建议您将自己的单元格渲染器从JCheckBox
扩展,并将其设置为Boolean
类的默认单元格渲染器。它将避免您在getCellRenderer()
方法中进行对齐更改。
默认情况下注意getDefaultRenderer(Boolean.class)
会返回JCheckBox
但getDefaultEditor(Boolean.class)
会返回javax.swing.JTable.BooleanEditor
,当逻辑显示它也应返回JCheckBox
时。因此,在某些情况下,投射默认渲染器可能会成为一个问题。
我以这种方式工作:
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);
正如您所看到的那样,密钥是从DefaultCellEditor
开始设置JCheckBox
作为Boolean
类的默认单元格编辑器。
<强>截图强>
<强> SSCCE 强>
这是一个完整的SSCCE来测试这个:
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();
}
});
}
}