[OpenLayers-Users] mousewheel jumps two zoom levels

[Daniel Behr]

thanks Andreas, this works fine for me...

Am 26.01.2012 16:51, schrieb Andreas Hocevar:
> Hi,
>
> whether one tick on the mouse wheel is one zoom level or not depends
> on the mouse sensitivity, which is a system-wide setting. You can,
> however, pass something like
>
> mouseWheelOptions: {interval: 20, cumulative: false}
>
> to the Navigation control, and it will only change the zoom by 1 for a
> 20ms drag. You can try this setting online here:
> http://openlayers.org/dev/examples/mobile-wmts-vienna.html
>
> Andreas.
>
> On Thu, Jan 26, 2012 at 4:41 PM, Daniel Behr<daniel.behr at hzg.de>  wrote:
>> I'm facing a similar problem, but for my app its a cross-browser issue on
>> windows machines only! on linux its fine and the map has only one Navigation
>> Control.
>>
>> does this help to spot the problem?
>>
>> Daniel
>>
>> Am 26.01.2012 16:25, schrieb Andreas Hocevar:
>>
>>> My guess is that you have two Navigation controls. One that is added
>>> to the map by default unless you configure it with your custom array
>>> of controls, and the navControl you added.
>>>
>>> You can check in the javascript console by trying
>>>
>>> map.getControlsByClass("OpenLayers.Control.Navigation");
>>>
>>> and see if it returns an array of length 1 or 2.
>>>
>>> The obvious fix is to configure the map with your own default set of
>>> controls.
>>>
>>> Andreas.
>>>
>>> On Thu, Jan 26, 2012 at 3:29 PM, Vidal, Antoni<antoni.vidal at icc.cat>
>>>   wrote:
>>>>
>>>> Hi list,
>>>>
>>>>
>>>>
>>>> I’ve an OpenLayers.control.Navigation with following config options:
>>>>
>>>>
>>>>
>>>>          var navControl = new OpenLayers.Control.Navigation({
>>>>
>>>>              type: OpenLayers.Control.TYPE_TOGGLE,
>>>>
>>>>              zoomWheelEnabled: true,
>>>>
>>>>              mouseWheelOptions: {interval: 1}
>>>>
>>>>          });
>>>>
>>>>
>>>>
>>>> But when user changes map zoom level using mousewheel, map zoomlevel
>>>> jumps
>>>> from 0 to 2 and then to 4, etc.
>>>>
>>>>
>>>>
>>>> Is possible to change this behaviour and force change zoomlevel one by
>>>> one ?
>>>>
>>>>
>>>>
>>>> Thanks in advance.
>>>>
>>>>
>>>>
>>>> Antoni Vidal
>>>>
>>>> Unitat d'Aplicacions SIG-WEB
>>>> Institut Cartogràfic de Catalunya
>>>> Parc de Montjuïc, E-08038 Barcelona
>>>> Tel. (+34) 93 567 15 00 (ext. 3228)
>>>> www.icc.cat
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>> Users at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/openlayers-users
>>>>
>>>
>>>
>>>
>>
>> --
>> Daniel Behr
>> Institut für Küstenforschung
>> WebGIS Entwicklung
>> +49 (0)4152 87 1589 (fax -1596)
>> Daniel.Behr at hzg.de
>> Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH
>> Max-Planck-Straße 1 I 21502 Geesthacht I Deutschland/Germany
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>> Court) Internet: http://www.hzg.de
>>   _______________________________________________
>>
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>
>
>
Helmholtz-Zentrum Geesthacht 
Zentrum für Material- und Küstenforschung GmbH 
Max-Planck-Straße 1 I 21502 Geesthacht I Deutschland/Germany 

Geschäftsführer/Board of Management: Prof. Dr. Wolfgang Kaysser, Dipl.-Ing. Michael Ganß 
Vorsitzender des Aufsichtsrates/Chairman of the Supervisory Board: MinDirig Wilfried Kraus 
Amtsgericht Lübeck HRB 285 GE (Register Court) 
Internet: http://www.hzg.de