001package gwt.material.design.client.base.helper;
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
023
024import com.google.gwt.dom.client.Document;
025import com.google.gwt.dom.client.Element;
026import com.google.gwt.user.client.ui.RootPanel;
027import gwt.material.design.client.base.MaterialWidget;
028
029/**
030 * Created by Mark Kevin on 12/2/2015.
031 */
032public class ColorHelper {
033
034    public static String setupComputedBackgroundColor(String color) {
035        MaterialWidget temp = new MaterialWidget(Document.get().createDivElement());
036        temp.setBackgroundColor(color);
037        RootPanel.get().add(temp);
038        String computed = getComputedBackgroundColor(temp.getElement()).toLowerCase();
039        temp.removeFromParent();
040        return computed;
041    }
042
043    /**
044     * Native call to getComputedStyle.
045     */
046    protected static native String getComputedBackgroundColor(Element e)/*-{
047        var cs = $wnd.document.defaultView.getComputedStyle(e, null);
048        return cs.getPropertyValue('background-color');
049    }-*/;
050
051}