JTable - 对齐列下的组件 [英] JTable - align components under the columns
本文介绍了JTable - 对齐列下的组件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在JTable的特定列下对齐其他组件(如按钮,标签等)的方法是什么?例如,我想在列下添加复选框,另一个复选框,用于选择该特定列中的所有值。
What would be the approach to align additional components, such as a button, a label etc. under a specific column of the JTable? I would like to, for instance, add under the column with checkboxes, another checkbox that would select all the values in that particular column.
推荐答案
据我所知,使用 TableColumnModelListener ,包含调整大小和重新排序的正确事件
as far as I understood, usage of TableColumnModelListener, with proper events from resize and reordering
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableFilterRow extends JFrame implements TableColumnModelListener {
private static final long serialVersionUID = 1L;
private JTable table;
private JPanel filterRow; // Panel for text fields
public TableFilterRow() {
table = new JTable(3, 5);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
table.getColumnModel().addColumnModelListener(this);
filterRow = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 0));
for (int i = 0; i < table.getColumnCount(); i++) {
filterRow.add(new JTextField(" Sum at - " + i));
}
columnMarginChanged(new ChangeEvent(table.getColumnModel()));
getContentPane().add(filterRow, BorderLayout.SOUTH);
}
// Implement TableColumnModelListener methods
// (Note: instead of implementing a listener you should be able to
// override the columnMarginChanged and columMoved methods of JTable)
@Override
public void columnMarginChanged(ChangeEvent e) {
TableColumnModel tcm = table.getColumnModel();
int columns = tcm.getColumnCount();
for (int i = 0; i < columns; i++) {
JTextField textField = (JTextField) filterRow.getComponent(i);
Dimension d = textField.getPreferredSize();
d.width = tcm.getColumn(i).getWidth();
textField.setPreferredSize(d);
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
filterRow.revalidate();
}
});
}
@Override
public void columnMoved(TableColumnModelEvent e) {
Component moved = filterRow.getComponent(e.getFromIndex());
filterRow.remove(e.getFromIndex());
filterRow.add(moved, e.getToIndex());
filterRow.validate();
}
@Override
public void columnAdded(TableColumnModelEvent e) {
}
@Override
public void columnRemoved(TableColumnModelEvent e) {
}
@Override
public void columnSelectionChanged(ListSelectionEvent e) {
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new TableFilterRow();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
这篇关于JTable - 对齐列下的组件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文