blob: bec0ba9ae93b7d721f66da898222a680c6398fbc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.ui.treetable;
import com.vaadin.data.Container;
import com.vaadin.data.Container.Hierarchical;
import com.vaadin.data.Container.Ordered;
import com.vaadin.data.Item;
/**
* Container needed by large lazy loading hierarchies displayed in TreeTable.
* <p>
* Container of this type gets notified when a subtree is opened/closed in a
* component displaying its content. This allows container to lazy load subtrees
* and release memory when a sub-tree is no longer displayed.
* <p>
* Methods from {@link Container.Ordered} (and from {@linkContainer.Indexed} if
* implemented) are expected to work as in "preorder" of the currently visible
* hierarchy. This means for example that the return value of size method
* changes when subtree is collapsed/expanded. In other words items in collapsed
* sub trees should be "ignored" by container when the container is accessed
* with methods introduced in {@link Container.Ordered} or
* {@linkContainer.Indexed}. From the accessors point of view, items in
* collapsed subtrees don't exist.
* <p>
*
*/
public interface Collapsible extends Hierarchical, Ordered {
/**
* <p>
* Collapsing the {@link Item} indicated by <code>itemId</code> hides all
* children, and their respective children, from the {@link Container}.
* </p>
*
* <p>
* If called on a leaf {@link Item}, this method does nothing.
* </p>
*
* @param itemId
* the identifier of the collapsed {@link Item}
* @param collapsed
* <code>true</code> if you want to collapse the children below
* this {@link Item}. <code>false</code> if you want to
* uncollapse the children.
*/
public void setCollapsed(Object itemId, boolean collapsed);
/**
* <p>
* Checks whether the {@link Item}, identified by <code>itemId</code> is
* collapsed or not.
* </p>
*
* <p>
* If an {@link Item} is "collapsed" its children are not included in
* methods used to list Items in this container.
* </p>
*
* @param itemId
* The {@link Item}'s identifier that is to be checked.
* @return <code>true</code> iff the {@link Item} identified by
* <code>itemId</code> is currently collapsed, otherwise
* <code>false</code>.
*/
public boolean isCollapsed(Object itemId);
}
|
