001/*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019 */
020package org.sonar.gwt.ui;
021
022import com.google.gwt.user.client.ui.ClickListener;
023import com.google.gwt.user.client.ui.Hyperlink;
024import com.google.gwt.user.client.ui.Widget;
025
026public class ExpandCollapseLink extends Hyperlink {
027
028  private Widget expandOrCollapse;
029
030  public ExpandCollapseLink(Widget expandOrCollapse) {
031    super();
032    this.expandOrCollapse = expandOrCollapse;
033    setText(getLinkLabel(!expandOrCollapse.isVisible()));
034    getElement().setId("expand-" + expandOrCollapse.getElement().getId());
035    setStyleName("expandCollapseLink");
036    final ExpandCollapseLink link = this;
037    this.addClickListener(new ClickListener() {
038      public void onClick(Widget sender) {
039        link.toggle();
040      }
041    });
042    getElement().getFirstChildElement().setAttribute("href", "#");
043  }
044
045  public void toggle() {
046    boolean visible = expandOrCollapse.isVisible();
047    setText(getLinkLabel(visible));
048    expandOrCollapse.setVisible(!visible);
049  }
050
051  protected String getLinkLabel(boolean show) {
052    return (show ? "expand" : "collapse");
053  }
054
055}