edu.ucdavis.cstars.client.event

Interface MapZoomStartHandler

public interface MapZoomStartHandler

Fires when a user commences zooming.

Author:

Justin Merz

Method Summary

Methods

Modifier and Type	Method and Description
void	onZoomStart(Extent extent, float zoomFactor, Point anchor, int level)

Method Detail

onZoomStart

void onZoomStart(Extent extent,
               float zoomFactor,
               Point anchor,
               int level)

Parameters:

extent - - Gets the extent when the zoom event starts.

zoomFactor - -The scale factor represents the amount as a percentage that the map zoomed in or out from the previous extent. A value of 2 means the map was zoomed in twice as far as the previous extent. A value of 0.5 means the map zoomed out twice as far as previously.

anchor - - The location of the mouse pointer. The Point x and y values are in screen units. This point acts as an anchor point, and this part of the map stays within the map region during the zoom process.

level - - Level of an ArcGISTiledMapServiceLayer before the zoom commences.