How to pass a parameter from URL

[jsanchez]

Hello all,

I'm just testing 'Fusion' and I wonder if it would be possible to deal with dynamic layers.

I would like the user could choose the data shown in a fixed given layer. To do so, I don't define the layer it on my MapServer/MAPFILE but instead I create it during Fusion load proccess using Mapscript in LoadMap.php which works fine.

Now I'd like to know how to pass a parameter from URL application to LoadMap.php containing the 'data' layer parameter which points to desired raster file.


Thanks

[Paul Deschamps]

Hi jsanchez,

There are a few different ways you can accomplish this. I would recommend that you create a separate php script and call it on the fusion.onInitialize

Here's some sample code. It may be a little rough and need a little TLC as I just whipped it together for you.


window.onload = function() {
    Fusion.initialize();
    Fusion.registerForEvent(Fusion.Event.FUSION_INITIALIZED, onInitialize);
}

function onInitialize(){
    // create a queryString object
    var oQS = new queryString();

    // get the QS "layers"
    var gLayers = oQS.get("layers");

    // get the mapwidget
    var mapWidget = Fusion.getMapById('mapArea');
    var maps = mapWidget.getAllMaps();
    var map = maps[0];

    // set the parameters for sessionid and mapname and layers
    var session = 'session='+map.getSessionID();
    var mapName = '&mapname='+ map._sMapname;
    var layers = '&layers='+gLayers;
    var params = session+mapName

    // bind ajax call to the function reloadMap
    var opts = {parameters: params, onComplete: reloadMap.bind(null)};

    var s =  "../myApp/showLayers.php";

    // trigger the ajax call
    Fusion.ajaxRequest(s, opts);
}

function reloadMap(){
    var map = Fusion.getMapById('mapArea');
    var maps = map.getAllMaps();
    maps[0].reloadMap();
}

function queryString(qs){
    d.log("queryString");
    this.params = {};
    this.get=queryString_get;

    if (qs == null)
        qs=location.search.substring(1,location.search.length);

    if (qs.length == 0) return;

    qs = qs.replace(/\+/g, ' ');
    var args = qs.split('&');

// split out each name=value pair
    for (var i=0;i<args.length;i++) {
        var value;
        var pair = args[i].split('=');
        var name = unescape(pair[0]);

        if (pair.length == 2)
            value = unescape(pair[1]);
        else
            value = name;

        this.params[name] = value;
    }
}

/*
function queryString_get - return the key values
*/
function queryString_get(key, default_) {
    // This silly looking line changes UNDEFINED to NULL
    if (default_ == null) default_ = null;

    var value=this.params[key];
    if (value==null) value=default_;

    return value;
}

On Wed, Feb 18, 2009 at 5:18 AM, jsanchez <[hidden email]> wrote:

Hello all,

I'm just testing 'Fusion' and I wonder if it would be possible to deal with
dynamic layers.

I would like the user could choose the data shown in a fixed given layer. To
do so, I don't define the layer it on my MapServer/MAPFILE but instead I
create it during Fusion load proccess using Mapscript in LoadMap.php which
works fine.

Now I'd like to know how to pass a parameter from URL application to
LoadMap.php containing the 'data' layer parameter which points to desired
raster file.


Thanks


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   Paul Deschamps
   Applications Specialist
   DM Solutions Group Inc.

   Office: [phone] x28
   [hidden email]
   http://www.dmsolutions.ca
   http://research.dmsolutions.ca
   


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[jsanchez]

Thank you Paul for such a fast and dedicated reply,

I'll be trying to put in practice your indications.
Before that, I'm afraid I have to get familiarized a little more on Fusion internals.

Regards,

Jsanchez