Cascader

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Revision as of 02:58, 19 November 2019 by Jeanher (talk | contribs) (→‎Example)

Cascader

  • Available for ZK:
  • http://www.zkoss.org/product/zkhttp://www.zkoss.org/whyzk/zkeeVersion ee.png
[ since 9.0.0 ]

Employment/Purpose

A Cascader is a dropdown list in a tree structure and supports TreeModel.

Example

File:Cascader-example.png

    <zscript><![CDATA[
        DefaultTreeModel tm = new DefaultTreeModel(new DefaultTreeNode("ROOT",
        Arrays.asList(new DefaultTreeNode[]{
                new DefaultTreeNode("David", Arrays.asList(new TreeNode[]{new DefaultTreeNode("David-1"),
                                 new DefaultTreeNode("David-2")})),
                new DefaultTreeNode("Thomas",new ArrayList()),
                new DefaultTreeNode("Steven",new ArrayList())})));
    ]]></zscript>
    <cascader width="300px" model="${tm}" />

Users can select in layers, and the selected items are converted into text. (Default: joining by slashes, i.g. "A/B/C")

Properties

Disabled

Sets whether it is disabled. A disabled component can't interact with users.

ItemConverter

The converter generates the label text shown in the cascader. By implementing your own Converter, you can generate the label that represents the selected item. The default implementation is joining all the toString() result of items by slashes.

ItemRenderer

See also: ZK_Developer's_Reference/MVC/View/Renderer/Cascader_Renderer

The item renderer is used to render each item.

By implementing your own ItemRenderer, you can generate the HTML fragment for the data model. Normally you would like to use the default implementation and use <template name="model"> instead.

Model

The tree model associated with this cascader.

Open

Drops down or closes the list of items.

Placeholder

When the selected item is empty, the placeholder text would be displayed. (Default: empty)

SelectedItem

Represents the selected item, or null if no item is selected.

A non-leaf item can't be selected in the cascader. For example, users can only select item C in an A - B - C structure. But items A and B can't be selected.

Supported Events

Name
Event Type
onAfterRender
Event: Event

Notifies one that the model's data has been rendered.

onSelect
Event: SelectEvent

Represents an event caused by user's the selection changed at the client.

onOpen
Event: OpenEvent

Represents an event that indicates an open state that is changed at the client.

Supported Children

* None

Use Cases

Version Description Example Location
     

Version History

Last Update : 2019/11/19


Version Date Content
9.0.0 November, 2019 ZK-4392: Provide a cascader component



Last Update : 2019/11/19

Copyright © Potix Corporation. This article is licensed under GNU Free Documentation License.