src/share/tools/IdealGraphVisualizer/View/src/com/sun/hotspot/igv/view/actions/MouseOverAction.java

/*
 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */
package com.sun.hotspot.igv.view.actions;

import org.netbeans.api.visual.action.HoverProvider;
import org.netbeans.api.visual.action.WidgetAction;
import org.netbeans.api.visual.action.WidgetAction.State;
import org.netbeans.api.visual.widget.Widget;

/**
 *
 * @author Thomas Wuerthinger
 */
public class MouseOverAction extends WidgetAction.Adapter {

    private long eventID = Integer.MIN_VALUE;
    private HoverProvider provider;

    public MouseOverAction(HoverProvider provider) {
        this.provider = provider;
    }

    @Override
    public State mouseMoved(Widget widget, WidgetMouseEvent event) {
        long id = event.getEventID();
        if (id != eventID) {
            eventID = id;
            provider.widgetHovered(widget);
        }
        return State.REJECTED;
    }

    @Override
    public State mouseExited(Widget widget, WidgetMouseEvent event) {
        provider.widgetHovered(null);
        return State.REJECTED;
    }
}