org.jboss.ballroom.client.util.LoadingOverlay.java Source code

Introduction

Here is the source code for org.jboss.ballroom.client.util.LoadingOverlay.java

Source

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @author tags. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */

package org.jboss.ballroom.client.util;

import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;

public class LoadingOverlay {
    static PopupPanel p = null;

    public static void on(Widget parent, boolean loading) {
        if (parent != null && loading) {
            int left = parent.getAbsoluteLeft();
            int top = parent.getAbsoluteTop();

            int width = parent.getOffsetWidth();
            int height = parent.getOffsetHeight();

            p = new PopupPanel();
            //p.setStylePrimaryName("bpm-loading-overlay");
            p.setWidget(new Image("images/loading_lite.gif"));
            p.setPopupPosition(left + (width / 2) - 15, top + (height / 2) - 15);
            p.show();

        } else {
            if (p != null) {
                p.hide();
                p = null;
            }
        }
    }

    public static void hide() {
        if (p != null)
            p.hide();
    }
}