|
1
|
/**
|
|
2
|
* Copyright (C) 2018 EDIT
|
|
3
|
* European Distributed Institute of Taxonomy
|
|
4
|
* http://www.e-taxonomy.eu
|
|
5
|
*
|
|
6
|
* The contents of this file are subject to the Mozilla Public License Version 1.1
|
|
7
|
* See LICENSE.TXT at the top of this package for the full license terms.
|
|
8
|
*/
|
|
9
|
package eu.etaxonomy.taxeditor.preference.wizard;
|
|
10
|
|
|
11
|
import org.eclipse.jface.viewers.AbstractTreeViewer;
|
|
12
|
import org.eclipse.jface.viewers.CheckboxTreeViewer;
|
|
13
|
import org.eclipse.jface.viewers.ILabelProvider;
|
|
14
|
import org.eclipse.jface.viewers.ITreeContentProvider;
|
|
15
|
import org.eclipse.swt.SWT;
|
|
16
|
import org.eclipse.swt.layout.GridData;
|
|
17
|
import org.eclipse.swt.layout.GridLayout;
|
|
18
|
import org.eclipse.swt.widgets.Composite;
|
|
19
|
import org.eclipse.swt.widgets.Tree;
|
|
20
|
import org.eclipse.swt.widgets.TreeItem;
|
|
21
|
|
|
22
|
/**
|
|
23
|
* @author pplitzner
|
|
24
|
* @since Oct 26, 2018
|
|
25
|
*
|
|
26
|
*/
|
|
27
|
public class CheckBoxTreeComposite extends Composite {
|
|
28
|
|
|
29
|
private CheckboxTreeViewer viewer;
|
|
30
|
|
|
31
|
public CheckBoxTreeComposite(Composite parent, ITreeContentProvider contentProvider, ILabelProvider labelProvider, int style) {
|
|
32
|
super(parent, style);
|
|
33
|
Composite composite = new Composite(parent, SWT.NULL);
|
|
34
|
composite.setLayout(new GridLayout());
|
|
35
|
Tree tree = new Tree(parent, SWT.BORDER | SWT.CHECK);
|
|
36
|
tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
|
|
37
|
tree.addListener(SWT.Selection, event -> {
|
|
38
|
if (event.detail == SWT.CHECK) {
|
|
39
|
TreeItem item = (TreeItem) event.item;
|
|
40
|
Object data = item.getData();
|
|
41
|
boolean checked = item.getChecked();
|
|
42
|
if(checked){
|
|
43
|
viewer.expandToLevel(data, AbstractTreeViewer.ALL_LEVELS);
|
|
44
|
}
|
|
45
|
checkItems(item, checked);
|
|
46
|
checkPath(item.getParentItem(), checked, false);
|
|
47
|
}
|
|
48
|
});
|
|
49
|
viewer = new CheckboxTreeViewer(tree);
|
|
50
|
viewer.setContentProvider(contentProvider);
|
|
51
|
viewer.setLabelProvider(labelProvider);
|
|
52
|
}
|
|
53
|
|
|
54
|
private void checkPath(TreeItem item, boolean checked, boolean grayed) {
|
|
55
|
if (item == null) {
|
|
56
|
return;
|
|
57
|
}
|
|
58
|
if (grayed) {
|
|
59
|
checked = true;
|
|
60
|
} else {
|
|
61
|
int index = 0;
|
|
62
|
TreeItem[] items = item.getItems();
|
|
63
|
while (index < items.length) {
|
|
64
|
TreeItem child = items[index];
|
|
65
|
if (child.getGrayed() || checked != child.getChecked()) {
|
|
66
|
checked = grayed = true;
|
|
67
|
break;
|
|
68
|
}
|
|
69
|
index++;
|
|
70
|
}
|
|
71
|
}
|
|
72
|
item.setChecked(checked);
|
|
73
|
item.setGrayed(grayed);
|
|
74
|
checkPath(item.getParentItem(), checked, grayed);
|
|
75
|
}
|
|
76
|
|
|
77
|
private void checkItems(TreeItem item, boolean checked) {
|
|
78
|
item.setGrayed(false);
|
|
79
|
item.setChecked(checked);
|
|
80
|
TreeItem[] items = item.getItems();
|
|
81
|
for (int i = 0; i < items.length; i++) {
|
|
82
|
checkItems(items[i], checked);
|
|
83
|
}
|
|
84
|
}
|
|
85
|
|
|
86
|
public CheckboxTreeViewer getViewer() {
|
|
87
|
return viewer;
|
|
88
|
}
|
|
89
|
|
|
90
|
/**
|
|
91
|
* Checks the tree items corresponding to the given elements.<br>
|
|
92
|
* <br>
|
|
93
|
* <b>Note:</b> In order to fully reveal the checked elements they
|
|
94
|
* have to be sorted according to the tree hierarchy.
|
|
95
|
* @param elements
|
|
96
|
*/
|
|
97
|
public void setCheckedElements(Object[] elements) {
|
|
98
|
for (Object object : elements) {
|
|
99
|
viewer.reveal(object);
|
|
100
|
viewer.setChecked(object, true);
|
|
101
|
}
|
|
102
|
}
|
|
103
|
|
|
104
|
}
|