1 /**
2 * This file Copyright (c) 2010-2015 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.vaadin.gwt.client.magnoliashell.viewport;
35
36 import info.magnolia.ui.vaadin.gwt.client.magnoliashell.viewport.widget.ViewportWidget;
37
38 import com.google.gwt.user.client.ui.Widget;
39
40 /**
41 * Viewports might have different ways of displaying the content. This interface helps to define
42 * them from outside.
43 */
44 public interface TransitionDelegate {
45
46 void setActive(ViewportWidget viewport, boolean active);
47
48 void setVisibleChild(ViewportWidget viewport, Widget app);
49
50 boolean inProgress();
51
52 /**
53 * The Class BaseTransitionDelegate with the bypass mechanism.
54 */
55 static abstract class BaseTransitionDelegate implements TransitionDelegate {
56
57 @Override
58 public void setActive(ViewportWidget viewport, boolean active) {
59 viewport.setVisible(active);
60 }
61
62 @Override
63 public void setVisibleChild(ViewportWidget viewport, Widget app) {
64 viewport.showChildNoTransition(app);
65 }
66
67 @Override
68 public boolean inProgress() {
69 return false;
70 }
71 }
72
73 }