[Chameleon] MapTips and JSAPI

[Pierre Racine]

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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