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h2. Overview
_Since 3.1_

The _ace:listControl_ component renders a set of controls for moving items among ace:list components. It requires a selector that defines the set of ace:list components to move items between. Defaults to all lists. Optionally if this component has two nested ace:list children, they will be rendered within a styled container, and connected via this control without configuration.

{tip}See the ICEfaces Showcase [Live Demo|] of this component, complete with source code.{tip}

h2. Getting Started

In most cases, it's enough to add the tag on the page without any configuration.

{code:xml|borderStyle=dashed}<html ... xmlns:ace="">
<ace:listControl id="listControl">
<f:facet name="header">
Multi List Header
<ace:list .../>
<ace:list .../>
<ace:list .../>

h2. Attributes

{tip:title=TagLib Documentation}This section covers attributes involved in the typical use-cases for this component. For reference, the complete taglib documentation for this component is available [here|].{tip}
*selector:* JQuery/CSS selector defining the group of lists this control navigates and creates mutually exclusive selection between. Default selects all lists. When in dual list mode, this property has no effect. Default = '.if-list'.
*position:* When dual list mode is used, this property will determine if we render the migration control in the "MIDDLE", on the "TOP", "BOTTOM" or "BOTH" ends of the nested lists. "ALL" renders controls in every position Default = 'DualListPosition.TOP'.
*format:* Defines the order that the movement controls appear in. Default = 'alll lft rgt allr'.

h2. Client Behavior Events


h2. Javascript API

h4. ICEfaces 3.x

The client side component object is exposed through the global variable name specified in the *widgetVar* attribute.

h4. ICEfaces 4+

The "widgetVar" attribute on the ACE components has been removed in ICEfaces 4 and in its place a new "ice.ace.instance()" client JavaScript object lookup API has been introduced. The reason for this change is to enable lazy-initialization of the ACE component JavaScript objects to improve runtime performance and reduce browser memory use.

{code}var widget = ice.ace.instance('frm:componentId);{code}

{tip}The _ice.ace.instance_ function requires the _full_ client id of the component to be specified, such as "j_idt77:componentId" instead of just "componentId". To reduce the complexity of working with complete IDs with this function it may be preferable in some cases to use {{prependId="false"}} in the enclosing form (e.g. _<h:form prependId="false">_).{tip}

{info}This component doesn't have a client-side API made specifically to be used by application developers. However, the component's internal methods and variables can be accessed in this way, including the underlying jQuery object and objects from underlying Javascript libraries (if applicable), and can be used for whatever purpose a developer might have in mind.

h2. Keyboard and ARIA Support

Not supported at the moment.

h2. Known Issues

None at the moment.