Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JTable;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;

public class Main {
    public static void main(String[] argv) throws Exception {
        JTable table = new JTable(5, 5);
        JTableHeader header = table.getTableHeader();
        header.addMouseListener(new ColumnHeaderListener());
    }
}

class ColumnHeaderListener extends MouseAdapter {
    public void mouseClicked(MouseEvent evt) {
        JTable table = ((JTableHeader) evt.getSource()).getTable();
        TableColumnModel colModel = table.getColumnModel();

        int index = colModel.getColumnIndexAtX(evt.getX());
        if (index == -1) {
            return;
        }
        Rectangle headerRect = table.getTableHeader().getHeaderRect(index);
        if (index == 0) {
            headerRect.width -= 10;
        } else {
            headerRect.grow(-10, 0);
        }
        if (!headerRect.contains(evt.getX(), evt.getY())) {
            int vLeftColIndex = index;
            if (evt.getX() < headerRect.x) {
                vLeftColIndex--;
            }
        }
    }
}