[OpenLayers-Users] OpenLayers equivalent of ka-map pause event?

[Steve Lime]

For completeness here's what has worked for me, as hijacked from ka-map:

var timer=null, delay=2000;
var paused=false;

function mousePaused(e) {
   var coord = map.getLonLatFromViewPortPx(e.xy);
   ... do something with the coordinate ...
}

function mouseMove(e) {
   if(timer) clearTimeout(timer);
   if(paused == false) 
     self.timer = setTimeout(function(){clearTimeout(timer); paused = true; mousePaused(e); paused=false;}, delay);
}

function mouseOut(e) {
   clearTimeout(timer);
}

and in the onload function...

map.events.register("mousemove", map, mouseMove);
map.events.register("mouseout", map, mouseOut);

I can file a ticket if that would help.

Steve

>>> Tim Schaub <tschaub at openplans.org> 12/26/07 2:10 PM >>>
Mike Quentel wrote:
 > As far as the mouse events go, you might consider using a timer to
 > detect if user has paused for the amount of time over the map feature.
 > onmouseover could start the timer.  If user does not move (mousemove)
 > after a certain amount of time, then show the pop-up window if over a
 > map feature.

We could cook up a pause handler pretty easily.  This would let you 
develop controls that respond to mouse pauses.  The reason to use a 
handler for this is so that it can be used in multiple controls - or can 
be used to set the behavior of a control that might respond to clicks by 
default.  For example, an Information control (requests GetFeatureInfo 
by default) might use a click handler by default (responding to single 
or double-clicks) - giving this control a pause handler instead of a 
click handler would change it's behavior to respond to mouse pauses 
instead of mouse clicks.  No code floating around yet for this, but it 
shouldn't be hard to write.

A ticket would be the first step.  Then a patch.

Tim


> 
> I had to make timer functionality to ignore mouse wheel events that were
> too fast.  I've attached a simpler example of using a timer.  This is
> not the same as using the javascript setTimeout function.
> 
> Cheers,
>  
> Mike Quentel
> 
> 
> -----Original Message-----
> From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
> On Behalf Of Steve Lime
> Sent: Wednesday, 19 December 2007 16:12
> To: Eric Lemoine
> Cc: users at openlayers.org
> Subject: Re: [OpenLayers-Users] OpenLayers equivalent of ka-map pause
> event?
> 
> I'd just want a callback run with the x,y of the pause. In my case I do
> pure MapServer query requests with JSON or HTML responses. I ported the
> ka-map approach to my own non-tiled framework (for example,
> http://www.dnr.state.mn.us/waters/csg/index.html) and want to use a
> similar approach with OpenLayers clients I'm working on. 
> 
> Steve
> 
>>>> On 12/19/2007 at 2:47 PM, in message
> <5ec103de0712191247m1c7576b2vb63a50b0dbe0059d at mail.gmail.com>, "Eric
> Lemoine"
> <eric.c2c at gmail.com> wrote:
>> On Dec 19, 2007 9:37 PM, Steve Lime <Steve.Lime at dnr.state.mn.us>
> wrote:
>>> Folks familiar with ka-map might also be familiar with a mouse pause 
>>> event
>> that has proven
>>> to be really useful (for me anyway). I fires if the mouse has been
>> stationary a certain
>>> amount of time. I grep'd the source but didn't find anything obvious.
> 
>>> Does
>> anything like it
>>> exist? Thanks.
>> Steve
>>
>> What kind of request would you like to see triggered? WMS
> GetFeatureInfo?
>> FYI, we implemented this in MapFish, using our own REST-based protocol
> 
>> between the client and the server.
>>
>> --
>> Eric
> 
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> Scroll mouse wheel to see delta here.
> 
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