Check for land / disable zoom

Check for land / disable zoom

• AHTUNG

  Great ideas, Dave!

  1 - I'm embarassed I didn't think of that...

  2 - A quick search (live.com, of course) brought up this page on trapping the mousewheel:

  http://adomas.org/javascript-mouse-wheel/

   <<UPDATE: after playing around with this, I can't get the page-level events to fire when the mouse is positioned over the map. Maybe I'm missing something there, but it looks like the map control takes precedence. I'll update again if I figure it out.>>

  
  

• Malazar

  In my current project I need to get a weather forecast for any particular location on a map, so we used MapPoint to get the ZipCode from the VELatLong of the point, which we could then use in any number of services. So I was lucky to have just stumbled accross the GetLocationinfo call
  
  

• Drummos

  Are there any more updates on this thread I'm trying to find a way to disable the mouse wheel on the map as well. Currently I'm limiting the zoom-out level of the map to 7. I'm doing this by trapping the onendzoom event, and in my event handler, setting the map zoom level back to 7 if it is less than that (because someone used the mouse wheel to zoom out further).
  
  As Ronni and Caleb mentioned this produces a less than ideal user experience as the map zooms out to 6 and then back in to 7. I'd love to just disable the mouse wheel completely. I've tried the method described in http://adomas.org/javascript-mouse-wheel/ and had the same experience as Ronnie and Caleb.
  
  Is anyone still working on this
  
  Thanks,
  Bart
  
  
  

• nmacro

  Yeah, I know it's not ideal. Maybe someone else on the forum has figured out a more elegant solution.

  To lock all user interaction, in the LoadMap() method, set the last parameter to true:

  map.LoadMap(new VELatLong(47,-111),14 ,'h' ,true);

  
  

• Raptorix

  1. You should be able to use the MapPoint web service method "GetLocationInfo" to figure out if a given location is over land or water given the "Entity" it returns. Not a built in VE function, but still pretty easy to use.

  2. Can you trap the mouse wheel event at the page level in a page and cancel the bubble I'm not a Javascript guru, but I thought this might be possible

  Regards,

  Dave

  
  
  

• perezd

  Thank you very much.

  Even though ot wasen't the answers I was hoping for :)

  the 2.b soloution is also what I'm doing for the moment, but it does not give the best experience that the control zoom back when changed... How do I lock the map for all user interaction

  
  

• su45937

  1. Thank you Dave, I'll try using the getLoactionInfo, it seems to be just what i'm looking for :)

  2. I have tryed to capture the mousewheel like the example caleb linked to, but It seems to only capture the events on the page and not in the VEmap object :(

  I have also try using the onstartzoom where I get the event as a parameter, but I can't find a way to cancel the event... Do you know how to, or have a link to a page where all events a descriped

  
  

• hye_heena

  Hi Bart

  I haven't got the time to work on it yet, so I'm still looking for a solution.

  /Ronni

  
  

• bk13

  Unfortunately I don't know too much about Javascript, but I'll ask around here at work [Vertigo] and see what i can come up with, we have some pretty amazing gurus!
  
  

• David pereira

  1. No.

  2. Not specifically. There are 2 things you can do:

  a. You can lock the entire map so that no user interaction is possible.

  b. You can set a global variable to the current map zoom level (var lvl = VEMap.GetZoomLevel();) when you first load the map, trap the onendzoom event, and in your event handler, set the map zoom level back to the global (VEMap.SetZoomLevel(lvl);).

  
  
• Check for land / disable zoom