Set cursor for jTabbedPane's tab in java

Question

I have created a custom jTabbedPane class which extends BasicTabbedPaneUI and have successfully created my desired jTabbedPane but now the problem is that how can I set Hand cursor for each tab in my custom jTabbedPane?

I tried to set cursor with this

tabbedPane.setUI(new CustomMainMenuTabs());
tabbedPane.setCursor(new Cursor((Cursor.HAND_CURSOR)));

this sets the cursor for whole of jTabbedPane but I want to set the cursor when mouse hovers over any of tab in it only.

How can I set Hand cursor for tabs in my jTabbedPane?

My Code is

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.plaf.basic.BasicTabbedPaneUI;


public class HAAMS 
{
  //My Custom class for jTabbedPane
  public static class CustomMainMenuTabs extends BasicTabbedPaneUI
  {
    protected void paintTabBackground(Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h, boolean isSelected)
    {
        Graphics2D g2 = (Graphics2D) g;

        Color color;

        if (isSelected) { color = new Color(74, 175, 211); } 
        else if (getRolloverTab() == tabIndex) {  color = new Color(45, 145, 180); } 
        else {color = new Color(68, 67, 67);}

        g2.setPaint(color);
        g2.fill(new RoundRectangle2D.Double(x, y, w, h, 30, 30));

        g2.fill(new Rectangle2D.Double(x + 100,y,w,h));
    }
  }

   public static void main(String[] args) 
   {
     JFrame MainScreen = new JFrame("Custom JTabbedPane");
     MainScreen.setExtendedState(MainScreen.getExtendedState() | JFrame.MAXIMIZED_BOTH);

     //Setting UI for my jTabbedPane implementing my custom class CustomMainMenuTabs
     JTabbedPane jtpane = new JTabbedPane(2);
     jtpane.setUI(new CustomMainMenuTabs());
     jtpane.add("1st Tabe", new JPanel());
     jtpane.add("2nd Tabe", new JPanel());
     jtpane.add("3rd Tabe", new JPanel());

     MainScreen.getContentPane().add(jtpane);
     MainScreen.setVisible(true);
  }
}

How to set cursor to HAND_CURSOR cursor when mouse hovers over any tab only not jpanel or any other component. It would be great if done without a mouse listener.

Answer 1

I see a lot of answers here that are WAY too complicated (custom UIs, extra listeners, Graphics stuff, etc.).

Basically, camickr spelled it out for you. Here's a simple demo:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;

public class JTabbedPaneCursorDemo implements Runnable
{
  JTabbedPane tabbedPane;

  public static void main(String[] args)
  {
    SwingUtilities.invokeLater(new JTabbedPaneCursorDemo());
  }

  public void run()
  {
    JPanel panelA = new JPanel();
    JPanel panelB = new JPanel();

    tabbedPane = new JTabbedPane();
    tabbedPane.addTab("A", panelA);
    tabbedPane.addTab("B", panelB);

    tabbedPane.addMouseMotionListener(new MouseMotionListener()
    {
      public void mouseDragged(MouseEvent e) {}

      public void mouseMoved(MouseEvent e)
      {
        adjustCursor(e);
      }
    });

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 200);
    frame.getContentPane().add(tabbedPane, BorderLayout.CENTER);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }

  private void adjustCursor(MouseEvent e)
  {
    TabbedPaneUI ui = tabbedPane.getUI();
    int index = ui.tabForCoordinate(tabbedPane, e.getX(), e.getY());

    if (index >= 0)
    {
      tabbedPane.setCursor(new Cursor((Cursor.HAND_CURSOR)));
    }
    else
    {
      tabbedPane.setCursor(null);
    }
  }
}

Answer 2

I want to set the cursor when mouse moves over any of tab in it.

I would guess you need to add a MouseMotionListener to the tabbed pane. Then when the mouseMoved(...) event is generated you check if the mouse is over a tab.

You should be able to use the tabForCoordinate(...) method of the BasicTabbePaneUI to determine if the mouse is over a tab or not.