[Chameleon] MapTips and JSAPI

Sun Apr 16 12:14:56 EDT 2006

Hi Pierre,

I emailed you back in December asking you to forward the code to Julien.

Cheers

Paul

On 16-Apr-06, at 10:42 AM, Pierre Racine wrote:

> Hi Bart,
>
> I'have done this work of adapting MapTips to JSAPI last summer. It  
> works pretty fine using also AJAX and everything. I'have sent my  
> code to Paul Spencer many months ago so he could integrate it in  
> the next release. But I never got any answer after two or three  
> emails. I'have wrote to Juilien-Samuel Lacroix three weeks ago to  
> see if this code would be in the upcoming release. No news since  
> then. Amazingly this guy is working 250km from me... Or people at  
> DMSolution to busy to integrate stuff or they do retain some  
> informations. I would not be surprised if this mail do not reach  
> the newsgroup.
>
> Anyway this is a strange Open Source project and this is very  
> frustrating. Many people are rebuiding the wheel because of a lack  
> of coordination.
>
> Probably there is something I haven't yet understand...
>
> Pierre Racine
>
>> From: "Eijnden, B. van den (Bart)" <b.vdeijnden at agi.rws.minvenw.nl>
>> To: "Eijnden, B. van den (Bart)"  
>> <b.vdeijnden at agi.rws.minvenw.nl>,         
>> "'chameleon at lists.maptools.org'" <chameleon at lists.maptools.org>
>> Subject: RE: [Chameleon] MapTips and JSAPI
>> Date: Thu, 6 Apr 2006 09:01:19 +0200
>>
>> Okay, gotten a little progress on this one.
>>
>> I have written a litter wrapper script around the MapTips widget  
>> (based on
>> UpdateMap.php), called maptips.php.
>>
>> Using the JSAPI event manager, I do an AJAX call to this script  
>> whenever the
>> map extent changes. For this I had to adapt the MapTips widget not to
>> include the <map> and </map> HTML tag when generating the  
>> ImageMap, since
>> the content is set using innerHTML. I'll suggest a fix for this in  
>> bugzilla,
>> i.e. the GenerateImageMap function should not add the <map> header  
>> but the
>> DrawPublish function should do that.
>>
>> So basically in the HTML template:
>>
>> 1) at the onload, register the event:
>> goCWCJSAPI.RegisterEvent(MAP_EXTENT_CHANGED, "GetImageMap")
>>
>> 2) GetImageMap function does a AJAX call to maptips.php:
>> function GetImageMap()
>> {
>>   call('/chameleon/widgets/MapTips/maptips.php?sid=[$gszSessId$] 
>> &minx=' +
>> goCWCJSAPI.oMap.minx +
>>     '&miny='+goCWCJSAPI.oMap.miny + '&maxx=' + goCWCJSAPI.oMap.maxx +
>>     '&maxy='+goCWCJSAPI.oMap.maxy, null, processAjax);
>> }
>>
>> 3) when the browser receives the content from maptips.php, it will  
>> trigger
>> the processAjax function which sets the innerHTML (IE specific btw):
>> function processAjax(szResults)
>> {
>>   if (document.all)
>>     document.all.maptips_imagemap6.innerHTML= "'"+szResults+"'";
>> }
>>
>> 4) don't forget to add the imagemap to your HTML template:
>> <map name="maptips_imagemap6"></map>
>>
>> The maptips.php wrapper script does the necessary processing to  
>> generate the
>> image map based on the MapTips widget, an excerpt is:
>>
>> $oMap = $oMapSession->oMap;
>> $oMap->setExtent($_GET['minx'], $_GET['miny'], $_GET['maxx'],
>> $_GET['maxy']);
>> $_SESSION["gszCurrentState"] = $oMapSession->saveState();
>> include_once("MapTips.widget.php");
>> $oWidget = new MapTips();
>> $oWidget->maParams["LAYER"] = 'werkzaamheden';
>> $oWidget->maParams["ATTRIBUTES"] = 'WEGNUMMER,STT_NAAM,GME_NAAM';
>> $oWidget->maParams["ONMOUSEOVER"] = 'myMaptipsOver';
>> $oWidget->maParams["ONMOUSEOUT"] = 'myMaptipsOut';
>> $oWidget->maParams["VISIBLE"] = 'false';
>> $oWidget->InitDefaults();
>> $oWidget->SetMap($oMapSession);
>> echo $oWidget->GenerateImageMap();
>>
>> This shows the advantages of using AJAX in combination with  
>> Chameleon JSAPI,
>> maybe not everybody knows but starting Chameleon 2.4 there is a  
>> small ajax
>> library in chameleon/htdocs/common/ajax/xhr.js which has the call  
>> javascript
>> function in it which I use in GetImageMap.
>>
>> Best regards,
>> Bart
>>
>> -----Oorspronkelijk bericht-----
>> Van: chameleon-bounces at lists.maptools.org
>> [mailto:chameleon-bounces at lists.maptools.org]Namens Eijnden, B.  
>> van den
>> (Bart)
>> Verzonden: woensdag 5 april 2006 13:13
>> Aan: 'chameleon at lists.maptools.org'
>> Onderwerp: [Chameleon] MapTips and JSAPI
>>
>>
>> Hi list,
>>
>> did anyone ever attempt to adapt the MapTips widget to work in  
>> JSAPI mode?
>>
>> Would this even be possible? I.e. can the current generation of  
>> browsers
>> handle an imagemap which is not embedded in the HTML page?
>>
>> Best regards,
>> Bart
>>
>>
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|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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