How to track EXIT / ENTER / HOVER with a mouse over a composite?

Question

The code below shows that:

1) HOVER is completely ignored by the composite. How to turn it on?

2) ENTER / EXIT is tracked, but when the mouse enters a child control area, the parent composite receives an EXIT event. How to make the entre area of ​​a composite belong to a composite?

public class TryHover {

    public static void main(String[] args) {

        Display display = new Display();

        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());

        Composite composite = new Composite(shell, SWT.BORDER);
        composite.setLayout(new GridLayout(1, false));

        Label label1 = new Label(composite, SWT.BORDER);
        label1.setText("Label 1");

        Label label2 = new Label(composite, SWT.BORDER);
        label2.setText("Label 2");

        composite.addListener(SWT.MouseEnter, new Listener() {

            @Override
            public void handleEvent(Event event) {
                System.out.println("ENTER");

            }
        });

        composite.addListener(SWT.MouseExit, new Listener() {

            @Override
            public void handleEvent(Event event) {
                System.out.println("EXIT");

            }
        });

        composite.addListener(SWT.MouseHover, new Listener() {

            @Override
            public void handleEvent(Event event) {
                System.out.println("HOVER");

            }
        });

        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }

    }
}

UPDATE

Yes, you must admit, if the mouse is slow, it also creates a HOVER.

Then the question is only about ENTER / EXIT: how to enable EXIT for child controls?

Answer 1

SWT.MouseHover , Composite .

SWT.MouseMove Composite.

, .

---

: SWT ( ).

, , .

• SWT.MouseExit: , - . , , , Composite.
• SWT.MouseEnter: . , Widget . Composite, , . , .

---

private static Widget mouseControl = null;

public static void main(String[] args)
{
    Display display = new Display();

    /* Overall, keep track of the Widget the mouse is moving over */
    display.addFilter(SWT.MouseMove, new Listener()
    {
        @Override
        public void handleEvent(Event e)
        {
            mouseControl = e.widget;
        }
    });

    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());

    final Composite composite = new Composite(shell, SWT.BORDER);
    composite.setLayout(new GridLayout(1, false));

    Label label1 = new Label(composite, SWT.BORDER);
    label1.setText("Label 1");

    Label label2 = new Label(composite, SWT.BORDER);
    label2.setText("Label 2");

    composite.addListener(SWT.MouseEnter, new Listener()
    {
        @Override
        public void handleEvent(Event event)
        {
            /* Check if the mouse was previously moving over a child (you could
             * even do recursive search here) */
            for (Control child : composite.getChildren())
            {
                if (child.equals(mouseControl))
                    return;
            }
            System.out.println("ENTER");
        }
    });

    composite.addListener(SWT.MouseExit, new Listener()
    {
        @Override
        public void handleEvent(Event event)
        {
            /* Check if the mouse is now located over a child (you could
             * even do recursive search here) */
            for (Control child : composite.getChildren())
            {
                if (child.getBounds().contains(new Point(event.x, event.y)))
                    return;
            }
            System.out.println("EXIT");
        }
    });

    composite.addListener(SWT.MouseHover, new Listener()
    {

        @Override
        public void handleEvent(Event event)
        {
            System.out.println("HOVER");
        }
    });

    shell.pack();
    shell.open();
    while (!shell.isDisposed())
    {
        if (!display.readAndDispatch())
            display.sleep();
    }
}

Answer 2

, Hover . , (. ), . - .

, - ? composite.setEnabled(true);, .