ScrollZoomHandler
The ScrollZoomHandler allows the user to zoom the map by scrolling.
Implements
Methods
disable()
disable():
void
Disables the "scroll to zoom" interaction.
Returns
void
Implementation of
Handler.disable
Example
Source
src/ui/handler/scroll_zoom.ts:147
enable()
enable(
options?:boolean|AroundCenterOptions):void
Enables the "scroll to zoom" interaction.
Parameters
| Parameter | Type | Description |
|---|---|---|
options? |
boolean | AroundCenterOptions |
Options object. |
Returns
void
Implementation of
Handler.enable
Example
Source
src/ui/handler/scroll_zoom.ts:133
isEnabled()
isEnabled():
boolean
Returns a Boolean indicating whether the "scroll to zoom" interaction is enabled.
Returns
boolean
true if the "scroll to zoom" interaction is enabled.
Implementation of
Handler.isEnabled
Source
src/ui/handler/scroll_zoom.ts:106
setWheelZoomRate()
setWheelZoomRate(
wheelZoomRate:number):void
Set the zoom rate of a mouse wheel
Parameters
| Parameter | Type | Description |
|---|---|---|
wheelZoomRate |
number |
1/450 The rate used to scale mouse wheel movement to a zoom value. |
Returns
void
Example
Slow down zoom of mouse wheel
Source
src/ui/handler/scroll_zoom.ts:98
setZoomRate()
setZoomRate(
zoomRate:number):void
Set the zoom rate of a trackpad
Parameters
| Parameter | Type | Description |
|---|---|---|
zoomRate |
number |
1/100 The rate used to scale trackpad movement to a zoom value. |
Returns
void
Example
Speed up trackpad zoom