ALKMaps.Control.PinchZoom

Inherits

ALKMaps.Control

Summary

ALKMaps.Control.PinchZoom
Properties
type	{ALKMaps.Control.TYPES}
containerCenter	{Object} Cached object representing the layer container center (in pixels).
pinchOrigin	{Object} Cached object representing the pinch start (in pixels).
currentCenter	{Object} Cached object representing the latest pinch center (in pixels).
autoActivate	{Boolean} Activate the control when it is added to a map.
Constructor
ALKMaps.Control.PinchZoom	Create a control for zooming with pinch gestures.
Functions
activate	Activate this control.
deactivate	Deactivate this control.
updateContainerCenter	Must be called each time the layer container moves.
pinchStart
pinchMove
applyTransform	Applies the given transform to layers.
pinchDone

Properties

type

{ALKMaps.Control.TYPES}

containerCenter

{Object} Cached object representing the layer container center (in pixels).

pinchOrigin

{Object} Cached object representing the pinch start (in pixels).

currentCenter

{Object} Cached object representing the latest pinch center (in pixels).

autoActivate

{Boolean} Activate the control when it is added to a map. Default is true.

Constructor

ALKMaps.Control.PinchZoom

Create a control for zooming with pinch gestures. This works on devices with multi-touch support.

Parameters

options

{Object} An optional object whose properties will be set on the control

Functions

activate

activate: function()

Activate this control. Must be called after the control is added to a map.

Returns

{Boolean} The control was successfully activated.

deactivate

deactivate: function()

Deactivate this control.

Returns

{Boolean} The control was successfully deactivated.

updateContainerCenter

updateContainerCenter: function()

Must be called each time the layer container moves.

pinchStart

pinchStart: function( evt,

pinchData )

Parameters

evt	{Event}
pinchData	{Object} pinch data object related to the current touchmove of the pinch gesture. This give us the current scale of the pinch.

pinchMove

pinchMove: function( evt,

pinchData )

Parameters

evt	{Event}
pinchData	{Object} pinch data object related to the current touchmove of the pinch gesture. This give us the current scale of the pinch.

applyTransform

applyTransform: function( transform )

Applies the given transform to layers.

pinchDone

pinchDone: function( evt,

start,

last )

Parameters

evt	{Event}
start	{Object} pinch data object related to the touchstart event that started the pinch gesture.
last	{Object} pinch data object related to the last touchmove event of the pinch gesture. This give us the final scale of the pinch.