import com.google.gwt.event.dom.client.HasMouseMoveHandlers; //导入依赖的package包/类
public void setMouseMoved(JavaScriptObject aValue) {
	if (mouseMoved != aValue) {
		if (mouseMoveReg != null) {
			mouseMoveReg.removeHandler();
			mouseMoveReg = null;
		}
		mouseMoved = aValue;
		if (mouseMoved != null) {
			MouseMoveHandler handler = new MouseMoveHandler() {
				@Override
				public void onMouseMove(MouseMoveEvent event) {
					if (mouseMoved != null || mouseDragged != null) {
						event.stopPropagation();
						if (mouseState == MOUSE.NULL || mouseState == MOUSE.MOVED) {
							mouseState = MOUSE.MOVED;
							executeEvent(mouseMoved, EventsPublisher.publish(event));
						} else if (mouseState == MOUSE.PRESSED || mouseState == MOUSE.DRAGGED) {
							mouseState = MOUSE.DRAGGED;
							executeEvent(mouseDragged, EventsPublisher.publish(event));
						}
					}
				}

			};
			if (component instanceof Widget) {
				mouseMoveReg = ((Widget) component).addDomHandler(handler, MouseMoveEvent.getType());
			} else if (component instanceof HasMouseMoveHandlers) {
				mouseMoveReg = ((HasMouseMoveHandlers) component).addMouseMoveHandler(handler);
			}
		}
	}
}
 

import com.google.gwt.event.dom.client.HasMouseMoveHandlers; //导入依赖的package包/类
@Override
protected void initAreas(Board board) {
	SVGElement area = (SVGElement) svg.getElementById("area");
	NodeList<Element> nodeList = area.getElementsByTagName("path");
	for (int i = 0; i < nodeList.getLength(); ++i) {
		SVGElement item = (SVGElement) nodeList.getItem(i);
		OMElement node = OMElement.convert(item);
		((HasMouseMoveHandlers) node).addMouseMoveHandler(this);
		((HasMouseDownHandlers) node).addMouseDownHandler(this);
	}
}