LightweightDispatcher(Container nativeContainer) 
{
      
        this.nativeContainer = nativeContainer;
        mouseEventTarget = null;
        eventMask = 0;
}

 boolean dispatchEvent(AWTEvent e) 
{
        boolean ret = false;
        /*
         * Fix for BugTraq Id 4389284.
         * Dispatch SunDropTargetEvents regardless of eventMask value.
         * Do not update cursor on dispatching SunDropTargetEvents.
         */
        if (e instanceof SunDropTargetEvent) {
            SunDropTargetEvent sdde = (SunDropTargetEvent) e;
            ret = processDropTargetEvent(sdde);
        } else {
            if (e instanceof MouseEvent && (eventMask & MOUSE_MASK) != 0) {
                MouseEvent me = (MouseEvent) e;
                ret = processMouseEvent(me);
            }
            if (e.getID() == MouseEvent.MOUSE_MOVED) {
                nativeContainer.updateCursorImmediately();
            }
        }
        return ret;
}

Dispatches an event to a sub-component if necessary, and returns whether or not the event was forwarded to a sub-component.

  void dispose() 
{
        //System.out.println("Disposing lw dispatcher");
        stopListeningForOtherDrags();
        mouseEventTarget = null;
}

  void enableEvents(long events) 
{
        eventMask |= events;
}

Enables events to subcomponents.

 public  void eventDispatched(AWTEvent e) 
{
        boolean isForeignDrag = (e instanceof MouseEvent) &&
                                !(e instanceof SunDropTargetEvent) &&
                                (e.id == MouseEvent.MOUSE_DRAGGED) &&
                                (e.getSource() != nativeContainer);
        if (!isForeignDrag) {
            // only interested in drags from other hw components
            return;
        }
        MouseEvent      srcEvent = (MouseEvent)e;
        MouseEvent      me;
        synchronized (nativeContainer.getTreeLock()) {
            Component srcComponent = srcEvent.getComponent();
            // component may have disappeared since drag event posted
            // (i.e. Swing hierarchical menus)
            if ( !srcComponent.isShowing() ) {
                return;
            }
            // see 5083555
            // check if srcComponent is in any modal blocked window
            Component c = nativeContainer;
            while ((c != null) && !(c instanceof Window)) {
                c = c.getParent_NoClientCode();
            }
            if ((c == null) || ((Window)c).isModalBlocked()) {
                return;
            }
            //
            // create an internal 'dragged-over' event indicating
            // we are being dragged over from another hw component
            //
            me = new MouseEvent(nativeContainer,
                               LWD_MOUSE_DRAGGED_OVER,
                               srcEvent.getWhen(),
                               srcEvent.getModifiersEx() | srcEvent.getModifiers(),
                               srcEvent.getX(),
                               srcEvent.getY(),
                               srcEvent.getXOnScreen(),
                               srcEvent.getYOnScreen(),
                               srcEvent.getClickCount(),
                               srcEvent.isPopupTrigger(),
                               srcEvent.getButton());
            ((AWTEvent)srcEvent).copyPrivateDataInto(me);
            // translate coordinates to this native container
            final Point ptSrcOrigin = srcComponent.getLocationOnScreen();
            if (AppContext.getAppContext() != nativeContainer.appContext) {
                final MouseEvent mouseEvent = me;
                Runnable r = new Runnable() {
                        public void run() {
                            if (!nativeContainer.isShowing() ) {
                                return;
                            }
                            Point       ptDstOrigin = nativeContainer.getLocationOnScreen();
                            mouseEvent.translatePoint(ptSrcOrigin.x - ptDstOrigin.x,
                                              ptSrcOrigin.y - ptDstOrigin.y );
                            Component targetOver =
                                nativeContainer.getMouseEventTarget(mouseEvent.getX(),
                                                                    mouseEvent.getY(),
                                                                    Container.INCLUDE_SELF);
                            trackMouseEnterExit(targetOver, mouseEvent);
                        }
                    };
                SunToolkit.executeOnEventHandlerThread(nativeContainer, r);
                return;
            } else {
                if (!nativeContainer.isShowing() ) {
                    return;
                }
                Point   ptDstOrigin = nativeContainer.getLocationOnScreen();
                me.translatePoint( ptSrcOrigin.x - ptDstOrigin.x, ptSrcOrigin.y - ptDstOrigin.y );
            }
        }
        //System.out.println("Track event: " + me);
        // feed the 'dragged-over' event directly to the enter/exit
        // code (not a real event so don't pass it to dispatchEvent)
        Component targetOver =
            nativeContainer.getMouseEventTarget(me.getX(), me.getY(),
                                                Container.INCLUDE_SELF);
        trackMouseEnterExit(targetOver, me);
}

  void retargetMouseEvent(Component target,
    int id,
    MouseEvent e) 
{
        if (target == null) {
            return; // mouse is over another hw component or target is disabled
        }
        int x = e.getX(), y = e.getY();
        Component component;
        for(component = target;
            component != null && component != nativeContainer;
            component = component.getParent()) {
            x -= component.x;
            y -= component.y;
        }
        MouseEvent retargeted;
        if (component != null) {
            if (e instanceof SunDropTargetEvent) {
                retargeted = new SunDropTargetEvent(target,
                                                    id,
                                                    x,
                                                    y,
                                                    ((SunDropTargetEvent)e).getDispatcher());
            } else if (id == MouseEvent.MOUSE_WHEEL) {
                retargeted = new MouseWheelEvent(target,
                                      id,
                                       e.getWhen(),
                                       e.getModifiersEx() | e.getModifiers(),
                                       x,
                                       y,
                                       e.getXOnScreen(),
                                       e.getYOnScreen(),
                                       e.getClickCount(),
                                       e.isPopupTrigger(),
                                       ((MouseWheelEvent)e).getScrollType(),
                                       ((MouseWheelEvent)e).getScrollAmount(),
                                       ((MouseWheelEvent)e).getWheelRotation(),
                                       ((MouseWheelEvent)e).getPreciseWheelRotation());
            }
            else {
                retargeted = new MouseEvent(target,
                                            id,
                                            e.getWhen(),
                                            e.getModifiersEx() | e.getModifiers(),
                                            x,
                                            y,
                                            e.getXOnScreen(),
                                            e.getYOnScreen(),
                                            e.getClickCount(),
                                            e.isPopupTrigger(),
                                            e.getButton());
            }
            ((AWTEvent)e).copyPrivateDataInto(retargeted);
            if (target == nativeContainer) {
                // avoid recursively calling LightweightDispatcher...
                ((Container)target).dispatchEventToSelf(retargeted);
            } else {
                assert AppContext.getAppContext() == target.appContext;
                if (nativeContainer.modalComp != null) {
                    if (((Container)nativeContainer.modalComp).isAncestorOf(target)) {
                        target.dispatchEvent(retargeted);
                    } else {
                        e.consume();
                    }
                } else {
                    target.dispatchEvent(retargeted);
                }
            }
        }
}

Sends a mouse event to the current mouse event recipient using the given event (sent to the windowed host) as a srcEvent. If the mouse event target is still in the component tree, the coordinates of the event are translated to those of the target. If the target has been removed, we don't bother to send the message.