[OpenLayers-Users] Openlayers on iPad : zoom smoothness

[Henri-Maxime SUCHIER]

Bonjour Eric J and merci for your answer J

The fact is that pinch zoom actually works (I just checked that double tap zoom also does). But I can't get the same smoothness as on the example I mentioned. On this example, map zoom precisely follows fingers movement : zooming is continuous. On my work, there seems to be sort of a threshold, zoom is made step by step, and I can't understand why such a difference, as initialization are the same on the example and on my code.

There is no public access to the site currently, but I can send any relevant part of my code if it can provide information on what's the problem.

 

Thanks again,

HM.

 

 

De : Eric Lemoine [mailto:eric.lemoine at camptocamp.com] 
Envoyé : dimanche 9 octobre 2011 22:50
À : Henri-Maxime SUCHIER
Cc : users at openlayers.org
Objet : Re: [OpenLayers-Users] Openlayers on iPad : zoom smoothness

 



On Friday, October 7, 2011, Henri-Maxime SUCHIER <hm.suchier at artefacto.fr> wrote:
> Hello,
>
> I'm currently working on a website displaying a map fullscreen with openlayers. Main target for this website are iPads, and I thus would like to have smooth interactions with map (such as continuous zooms for example). Here is the way I build my map object :
>
>  
>
>                                options = {
>
>                                                div: "viewer",
>
>                                                theme: null,
>
>                                                projection: sm,
>
>                                                units: "m",
>
>                                                numZoomLevels: 18,
>
>                                                maxResolution: 156543.0339,
>
>                                                maxExtent: new OpenLayers.Bounds(
>
>                                                                -20037508.34, -20037508.34, 20037508.34, 20037508.34
>
>                                                ),
>
>                                                controls: [
>
>                                                                new OpenLayers.Control.TouchNavigation({
>
>                                                                               dragPanOptions: {
>
>                                                                                               enableKinetic: true
>
>                                                                               }
>
>                                                                })                                                          
>
>                                                ],
>
>                                                layers: [
>
>                                                                new OpenLayers.Layer.OSM("OpenStreetMap", null, {
>
>                                                                               transitionEffect: 'resize'
>
>                                                                })
>
>                                                ]                             
>
>                                };
>
> touchMap = new OpenLayers.Map(options);
>
>  
>
>  
>
> I'm wondering why I can't get the same smoothness as on this example http://openlayers.org/dev/examples/mobile-sencha.html where the same controls are used. Is the smoothness here obtained through the use of sencha ? Or is there something to be done with openlayers apart from the init stage ?

The TouchNavigation control should provide "pinch zoom". Does double-tap to zoom in work? And do you have a live example that people could look at?

-- 
Eric Lemoine

Camptocamp France SAS
Savoie Technolac, BP 352
73377 Le Bourget du Lac, Cedex

Tel : 00 33 4 79 44 44 96
Mail : eric.lemoine at camptocamp.com
http://www.camptocamp.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20111010/409c4a41/attachment-0001.html