Run the test below. It has three columns :
1)ordinary components
2)disabled components
3) non-editable components.

When running on XAWT/Motif pressing the mouse over any of disabled component doesn't result in firing the appropriate event. Although that perfectly happen on Windows.
Some of the events like MOUSE_EXIT/MOUSE_ENTER are still happening on XAWT.
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;

public class DisabledEvent
{
    static Vector containers = new Vector();
    static Vector disabledContainers = new Vector();
    static Vector uneditableTextComponents = new Vector();
    public static Panel addComponentsIntoPanel(boolean enabled, boolean editable){
        TextField tf = new TextField("TextField");
        TextArea ta = new TextArea("TextArea", 10, 10);
        Choice levelChooser = new Choice();
        levelChooser.add("Item #1");
        levelChooser.add("Item #2");
        Button b = new Button("BUTTON");
        Label label = new Label("LABEL");
        List list = new List(4, false);
        list.add("one");
        list.add("two");
        list.add("three");
        Checkbox chb = new Checkbox();
        Scrollbar sb = new Scrollbar(Scrollbar.HORIZONTAL);
        ScrollPane sp = new ScrollPane(ScrollPane.SCROLLBARS_ALWAYS);
        sp.add(new TextArea("this is a textarea in scrollpane"));
        sp.setSize(200, 200);
        Canvas canvas = new Canvas();
        canvas.setSize(100, 100);
        
        //add popup menu to Button
        final PopupMenu pm = new PopupMenu();
        MenuItem i1 = new MenuItem("Item1");
        MenuItem i2 = new MenuItem("Item2");
        MenuItem i3 = new MenuItem("Item3");
        i3.setEnabled(false);
        pm.add(i1);
        pm.add(i2);
        pm.add(i3);
        canvas.add(pm);

        ta.add(pm);
        ta.addMouseListener(new java.awt.event.MouseAdapter() {
                public void mousePressed( MouseEvent me ) {
                    if(me.isPopupTrigger()) {
                        pm.show(me.getComponent(), me.getX(), me.getY());
                    }
                }
            });

        Vector vector = containers;


        if (!enabled){
            vector = disabledContainers;
        } else {
            if (!editable){
                vector = uneditableTextComponents;
            }
        }

        vector.add(tf);
        vector.add(ta);
        if (editable){
            vector.add(levelChooser);
            vector.add(b);
            vector.add(label);
            vector.add(list);
            vector.add(chb);
            vector.add(sb);
            vector.add(sp);
            vector.add(canvas);
        } else {
            tf.setEditable(false);
            ta.setEditable(false);
        }
        
        Panel panel = new Panel();
        panel.setLayout(new GridLayout(0, 1));
        for (Enumeration e = vector.elements(); e.hasMoreElements();){
            Component c = (Component)e.nextElement();
            if (!enabled){
                c.setEnabled(false);
            }
            panel.add(c);
        }
        return panel;
    }

    public static void main(String s[])
    {
        Robot robot;
        Frame testFrame = new Frame("XAWTDifference. Test Frame.");
        testFrame.setLayout(new GridLayout(1, 3));
        testFrame.add(addComponentsIntoPanel(true, true));
        testFrame.add(addComponentsIntoPanel(false, true));
        testFrame.add(addComponentsIntoPanel(true, false));

        try {
            robot = new Robot();
        }catch (AWTException e){
            throw new RuntimeException("Unable to create robot:"+e);
        }
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        toolkit.addAWTEventListener(new AWTEventListener(){
           public void eventDispatched(AWTEvent ev){

              System.out.println(">> "+ev);
           }
        }, MouseEvent.BUTTON1_MASK);


        testFrame.pack();
        testFrame.setVisible(true);
    }// main
}// class