001package gwt.material.design.addins.client.scrollfire;
002
003/*
004 * #%L
005 * GwtMaterial
006 * %%
007 * Copyright (C) 2015 GwtMaterialDesign
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import com.google.gwt.dom.client.Element;
024import com.google.gwt.user.client.DOM;
025import gwt.material.design.addins.client.MaterialAddins;
026import gwt.material.design.client.MaterialDesignBase;
027
028//@formatter:off
029/**
030 * Material Scrollfire - executes callback functions depending on how far into the page you've scrolled.
031 *
032 * <h3>Java Usage:</h3>
033 *
034 * <pre>
035 * {@code
036 * MaterialScrollfire.apply(Element e, Runnable runnableCallback);
037 * }
038 * </pre>
039 * @see <a href="http://gwtmaterialdesign.github.io/gwt-material-demo/#scrollfire">Material Scrollfire</a>
040 * @author kevzlou7979
041 */
042//@formatter:on
043public class MaterialScrollfire {
044
045    static {
046        if(MaterialAddins.isDebug()) {
047            MaterialDesignBase.injectDebugJs(MaterialScrollfireDebugClientBundle.INSTANCE.scrollfireDebugJs());
048        } else {
049            MaterialDesignBase.injectJs(MaterialScrollfireClientBundle.INSTANCE.scrollfireJs());
050        }
051    }
052
053    public static void apply(Element element, Runnable callback) {
054        String uid = DOM.createUniqueId();
055        element.setId(uid);
056        apply("#" + uid, callback);
057    }
058
059    public static native void apply(String selector, Runnable callback) /*-{
060        $wnd.jQuery(document).ready(function() {
061            var offset = 100;
062            var callbackFn = $entry(function() {
063                callback.@java.lang.Runnable::run()();
064            });
065            $wnd.apply(selector, offset, callbackFn);
066        });
067    }-*/;
068}