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.widget;
35
36 import info.magnolia.ui.vaadin.gwt.client.magnoliashell.viewport.TransitionDelegate;
37
38 import com.google.gwt.user.client.ui.FlowPanel;
39 import com.google.gwt.user.client.ui.Widget;
40
41 /**
42 * An overlay that displays the open app in the shell on top of each other.
43 */
44 public class ViewportWidget extends FlowPanel {
45
46 private Widget visibleChild;
47
48 private TransitionDelegate transitionDelegate;
49
50 public ViewportWidget() {
51 super();
52 addStyleName("v-viewport");
53 }
54
55 public TransitionDelegate getTransitionDelegate() {
56 return transitionDelegate;
57 }
58
59 public void setTransitionDelegate(TransitionDelegate transitionDelegate) {
60 this.transitionDelegate = transitionDelegate;
61 }
62
63 public Widget getVisibleChild() {
64 return visibleChild;
65 }
66
67 public void showChild(Widget w) {
68 if (w != visibleChild) {
69 transitionDelegate.setVisibleChild(this, w);
70 visibleChild = w;
71 }
72 }
73
74 public void removeChild(Widget w) {
75 removeChildNoTransition(w);
76 }
77
78 /**
79 * Default non-transitioning behavior, accessible to transition delegates as a fall back.
80 */
81 public void showChildNoTransition(Widget w) {
82 if (visibleChild != null) {
83 visibleChild.setVisible(false);
84 }
85 w.setVisible(true);
86 }
87
88 public void removeChildNoTransition(Widget w) {
89 super.remove(w);
90 }
91
92
93 }