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 static java.util.stream.Collectors.toSet;
37
38 import info.magnolia.ui.contentapp.FilterableHierarchicalDataProvider;
39 import info.magnolia.ui.contentapp.browser.context.ValueContext;
40 import info.magnolia.ui.contentapp.configuration.TreeViewDefinition;
41
42 import javax.inject.Inject;
43
44 import com.vaadin.ui.TreeGrid;
45
46 /**
47 * Tree content view implementation.
48 * @param <T> item type.
49 */
50 public class TreeView<T> extends GridView<T, TreePresenter<T>> implements ContentView {
51
52 @Inject
53 public TreeView(ValueContext<T> valueContext, TreeViewDefinition<T> definition) {
54 super(valueContext, definition);
55
56 final TreeGrid<T> treeGrid = treeGrid();
57 treeGrid.addCollapseListener(e -> treeGrid.getEditor().cancel());
58 treeGrid.addSelectionListener(e -> e.getAllSelectedItems().forEach(this::expandParents));
59
60 valueContext.observe(selectedItems -> selectedItems.forEach(this::expandParents));
61
62 FilterableHierarchicalDataProvider<T> filterableHierarchicalDataProvider = presenter.dataProvider();
63 filterableHierarchicalDataProvider.setPreFetchProcessor(new AvailableSelectionProcessor<>(valueContext.current(), presenter::isItemAvailable));
64 }
65
66 @Override
67 protected TreePresenter<T> createPresenter() {
68 return create(TreePresenter.class, this, this.definition);
69 }
70
71 protected TreeGrid<T> treeGrid() {
72 return (TreeGrid<T>) this.grid;
73 }
74
75 private void expandParents(T item) {
76 treeGrid().expand(this.presenter.getParents(item).collect(toSet()));
77 }
78 }