topic Re: Zoom out tool - why do you have to draw a box? in ArcGIS JavaScript Maps SDK Questions

Zoom out tool - why do you have to draw a box?

JamesB — Thu, 11 Nov 2010 07:24:44 GMT

http://help.arcgis.com/EN/webapi/javascript/arcgis/demos/toolbar/toolbar_navigation.html

Zoom out tool - why do you have to draw a box?

I can see it's useful to be able to control how far you zoom out by drawing the box.

However when you click, nothing happens. This is counter to every other zoom out tool out there and users will be surprised by this. Drawing a box for zoom out is not intuitive.

Why can't it be done so a click zooms out by a pre-set amount, yet drawing a box allows the user to control how far you zoom out? Then you have the best of both.

Re: Zoom out tool - why do you have to draw a box?

AxelSchaefer — Thu, 11 Nov 2010 10:59:22 GMT

The default map navigation modes are explained here: http://help.arcgis.com/en/webapi/javascript/arcgis/help/jshelp_start.htm#jshelp/intro_navigation.htm. You can change the map events and bind them to other map navigation methods.

Personally I don't like the zoomin-by-point / zoom-out-by-point navigation. Dragging a rectangle is faster and convenient to the usage in desktop applications.

Re: Zoom out tool - why do you have to draw a box?

JamesB — Thu, 18 Nov 2010 13:23:01 GMT

Do you know if anyone's actually implemented a single click to zoom out handler? Would be great to add this in.

It's not a matter of personal favourites, its user expectations. I haven't seen any other software package where a single click in "Zoom Out" mode does nothing. The users will expect it to do something.

Thanks for your help 🙂

Re: Zoom out tool - why do you have to draw a box?

AxelSchaefer — Sat, 11 Dec 2021 22:06:36 GMT

Events: http://help.arcgis.com/en/webapi/javascript/arcgis/help/jshelp_start.htm#jshelp/inside_events.htm

function init() {
...
var mapOnClick_connect = dojo.connect(map, "onClick", mapOnClick);
...
}

function mapOnClick() {
  var extent = map.extent.expand(2);
  map.setExtent(extent);
}

Re: Zoom out tool - why do you have to draw a box?

JamesB — Tue, 23 Nov 2010 08:28:04 GMT

Cool, thanks