# Legato.Handler.MouseWheel

Handler for wheel up/down events

#### Extension to OpenLayers

Functionality to detect mousewheel-interaction on the map-div itself

#### Inherits from

- <OpenLayers.Handler.MouseWheel>

Summary

Legato.Handler.MouseWheel | Handler for wheel up/down events
Properties |
interval | {Integer} In order to increase server performance, an interval (in milliseconds) can be set to reduce the number of up/down events called.
Functions |
Legato.Handler.MouseWheel |
onWheelEvent | Catch the wheel event and handle it xbrowserly

### Properties

### interval

{Integer} In order to increase server performance, an interval (in milliseconds) can be set to reduce the number of up/down events called. If set, a new up/down event will not be set until the interval has passed. Defaults to 0, meaning no interval.

### Functions

### Legato.Handler.MouseWheel

#### Parameters

control | {<OpenLayers.Control>}
callbacks | {Object} An object containing a single function to be called when the drag operation is finished. The callback should expect to recieve a single argument, the point geometry.
options | {Object}

### onWheelEvent

> onWheelEvent: function( | e | )

Catch the wheel event and handle it xbrowserly

#### Parameters

e | {Event}

> onWheelEvent: function( | e | )

Catch the wheel event and handle it xbrowserly