001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.ui.sitemap;
029
030import org.opencms.ui.FontOpenCms;
031import org.opencms.ui.components.OpenCmsTheme;
032
033import com.vaadin.ui.Button;
034import com.vaadin.ui.themes.ValoTheme;
035
036/**
037 * Button used for opening / closing tree levels.<p>
038 */
039public class CmsSitemapTreeNodeOpener extends Button {
040
041    /** 'Minus' icon for the open state. */
042    public static final String MINUS = new String(new int[] {FontOpenCms.TREE_MINUS.getCodepoint()}, 0, 1);
043
044    /** 'Plus' icon for the closed state. */
045    public static final String PLUS = new String(new int[] {FontOpenCms.TREE_PLUS.getCodepoint()}, 0, 1);
046
047    /** Serial version id. */
048    private static final long serialVersionUID = 1L;
049
050    /**
051     * Creates a new instance.<p<
052     */
053    public CmsSitemapTreeNodeOpener() {
054        super();
055        addStyleName("opencms-font-icon");
056        addStyleName("o-sitemap-tree-opener");
057        addStyleName(ValoTheme.BUTTON_BORDERLESS);
058        addStyleName(OpenCmsTheme.BUTTON_UNPADDED);
059        setStyleOpen(false);
060    }
061
062    /**
063     * Sets the style of the button.<p>
064     *
065     * @param open true if the button should be set to 'open' state, false for the 'closed' state
066     */
067    public void setStyleOpen(boolean open) {
068
069        setCaption(open ? MINUS : PLUS);
070    }
071}