1 /**
2 * This file Copyright (c) 2018 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.ui.contentapp.browser;
35
36 import info.magnolia.ui.contentapp.browser.context.ValueContext;
37 import info.magnolia.ui.framework.UiFrameworkView;
38
39 import java.util.Collection;
40
41 import com.vaadin.ui.Alignment;
42 import com.vaadin.ui.HorizontalLayout;
43 import com.vaadin.ui.Label;
44
45 /**
46 * Provides human-readable information about the value/selection status in UI.
47 * @param <T> item type.
48 */
49 public abstract class StatusBar<T> extends HorizontalLayout implements UiFrameworkView {
50
51 private static final String STYLE_NAME = "statusbar";
52
53 private final Label statusText = new Label();
54
55 public StatusBar(ValueContext<T> valueContext) {
56 this.addStyleName(STYLE_NAME);
57 this.setDefaultComponentAlignment(Alignment.TOP_LEFT);
58 this.addComponentsAndExpand(statusText);
59 this.setSpacing(true);
60 this.setMargin(false);
61 this.setWidth(100, Unit.PERCENTAGE);
62
63 valueContext.observeNullable(selection -> this.statusText.setValue(selection == null ? "" : describe(selection)));
64 }
65
66 protected abstract String describe(Collection<T> selectedItems);
67 }