# NavigationHistoryPrevious.js

Summary

NavigationHistoryPrevious.js |
Properties |
title | {string} This property is used for showing a tooltip over the NavigationHistoryPrevious control.
Functions |
OpenLayers.Control.NavigationHistoryPrevious |
onPreviousChange | Called when the previous history stack changes.
lc:NavigationHistoryPrevious XML based config for a <Legato.Control.NavigationHistoryPrevious>. |

### Properties

### title

{string} This property is used for showing a tooltip over the NavigationHistoryPrevious control. Default value is “Previous”.

### Functions

### OpenLayers.Control.NavigationHistoryPrevious

#### Parameters

history | {Legato.Control.NavigationHistory}
options | {Object}

### onPreviousChange

> onPreviousChange: function( | event | )

Called when the previous history stack changes.

#### Parameters

state | {Object} An object representing the state to be restored if previous is triggered again or null if no previous states remain.
length | {Integer} The number of remaining previous states that can be restored.

## lc:NavigationHistoryPrevious XML based config for a <Legato.Control.NavigationHistoryPrevious>.

See Also: | Legato.Control - Legato.Beans.BeanFactory - <QName>

#### A valid config example for a NavigationHistoryPrevious would be

>     <lc:NavigationHistoryPrevious title="Tooltip for previous">
>       <history>
>         <lb:Reference target="NavigationHistory" />
>       </history>
>     </lc:NavigationHistoryPrevious>

> onPreviousChange: function( | event | )

Called when the previous history stack changes.
Abstract base class for all Legato control classes