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| author | Aleksi Hietanen <aleksi@vaadin.com> | 2017-03-21 15:53:59 +0200 |
|---|---|---|
| committer | Henri Sara <henri.sara@gmail.com> | 2017-03-21 15:53:59 +0200 |
| commit | d1fa1a3efe08e0843a38947dcd8ffe65e04ed12c (patch) | |
| tree | a2757bfac569b6e718b68281ba9d2e0a8c6803bb /documentation/components | |
| parent | 2dc8c1b5ad81c0dd800225b6185f47fe952251f7 (diff) | |
| download | vaadin-framework-d1fa1a3efe08e0843a38947dcd8ffe65e04ed12c.tar.gz vaadin-framework-d1fa1a3efe08e0843a38947dcd8ffe65e04ed12c.zip | |
Add collapse and expand events to TreeGrid (#8889)
Closes #8760
Diffstat (limited to 'documentation/components')
| -rw-r--r-- | documentation/components/components-treegrid.asciidoc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/documentation/components/components-treegrid.asciidoc b/documentation/components/components-treegrid.asciidoc index b0e28fee5f..d3a431c3e9 100644 --- a/documentation/components/components-treegrid.asciidoc +++ b/documentation/components/components-treegrid.asciidoc @@ -93,3 +93,16 @@ treeGrid.addColumn(Project::getHoursDone).setCaption("Hours Done"); treeGrid.setHierarchyColumn("name"); ---- +== Listening to Events + +In addition to supporting all the listeners of the standard [classname]#Grid#, [classname]#TreeGrid# supports listening to the expansion and collapsing of items in its hierarchy. +The expand and collapse listeners can be added as follows: + +[source, java] +---- +treeGrid.addExpandListener(event -> log("Item expanded: " + event.getExpandedItem())); +treeGrid.addCollapseListener(event -> log("Item collapsed: " + event.getCollapsedItem())); +---- + +The return types of the methods `getExpandedItem` and `getCollapsedItem` are the same as the type of the [classname]#TreeGrid# the events originated from. +Note that collapse listeners will not be triggered for any expanded subtrees of the collapsed item. |