[ka-Map-dev] [Bug 1351] New: modify map/layer constructors to take objects rather than a fixed argument list

[bugzilla-daemon at bugzilla.maptools.org]

http://bugzilla.maptools.org/show_bug.cgi?id=1351

           Summary: modify map/layer constructors to take objects rather
                    than a fixed argument list
           Product: ka-Map
           Version: 0.2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: core
        AssignedTo: ka-map-dev at lists.maptools.org
        ReportedBy: pspencer at dmsolutions.ca


The purpose of this is to simplify passing values to object constructors.  Currently _map and _layer 
constructors take a long list of arguments.  Modifying this list is error prone.  An alternate approach is 
to pass a javascript object with properties that have the argument values:

new _map({name:'name',scales:new Array(1000,500,250)});

inside the _map constructor, values are accessed as:

function _map( o ) {
    this.name = o.name?o.name:'default map name';
}

This mechanism makes it easier and less error prone to pass more/less information to the constructor 
and provide reasonable defaults



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