[OpenLayers-Users] Adjust sensitivity of keyboard control and mouse wheel

[soatley]

Wow!

That is perfect!  This is exactly it.

Thank you!
Shawn


Andreas Hocevar-2 wrote:
> 
> Hi,
> 
> On Wed, Jun 24, 2009 at 6:27 PM, soatley<shawn at niagarafalls.ca> wrote:
>> Is there anyway to adjust the sensitivity of the keyboard controls
>> (panning)
>> and the mouse wheel (zooming)?  It would be nice if panning would pan a
>> little more for each key press and the zoom wheel would be a little less
>> sensitive.
> 
> Assuming you want this application-wide, the tweaks below have to be
> done before creating the map object:
> 
> // drag movement in pixels, default is 75
> OpenLayers.Control.KeyboardDefaults.prototype.slideFactor = 200; //
> default is 50
> 
> For the mousewheel, a bit more customisation is required: if you want
> to spin the wheel more before zooming occurs, you need a counter for
> the wheelUp and wheelDown handlers:
> 
> OpenLayers.Control.Navigation.prototype.counter = 0;
> OpenLayers.Control.Navigation.prototype.wheelUp = function(evt) {
>     this.counter++;
>     if(this.counter > 2) {
>         this.counter = 0;
>         this.wheelChange(evt, 1);
>     }
> };
> OpenLayers.Control.Navigation.prototype.wheelDown = function(evt) {
>     this.counter--;
>     if(this.counter < -2) {
>         this.counter = 0;
>         this.wheelChange(evt, -1);
>     }
> };
> 
> In the above setup, you need to spin the wheel three times as far as
> with the default config for the zoom to happen. If you want to make it
> even less sensitive, replace the 2 (and -2 respectively) with a higher
> number.
> 
> Regards,
> Andreas.
> 
>>
>> Shawn
>> --
>> View this message in context:
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>> Sent from the OpenLayers Users mailing list archive at Nabble.com.
>>
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>>
> 
> 
> 
> -- 
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
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> http://openlayers.org/mailman/listinfo/users
> 
> 

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