[OpenLayers-Users] RegularPolygon as a search polygon

[tino.desjardins at arcor.de]

Hello Brad,

I think the problem is your own separate EventHandler and the wrong handler "draw". The DrawFeature-Control has an eventhandler "featureAdded". Take this instead. 

e.g.

OpenLayers.Control.NoticeControl = OpenLayers.Class(OpenLayers.Control.DrawFeature,
{
    initialize: function(layer, handler, options) {

        OpenLayers.Control.DrawFeature.prototype.initialize.apply(this, [layer, handler, options]);

    },
    setMap: function(map) {
        this.handler.setMap(map);
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
    },
    featureAdded: function(feature) {
        alert(feature.geometry.toString());
        this.deleteFeature(feature);
    },
    deleteFeature: function(feature) {
        feature.state = OpenLayers.State.DELETE;
        this.layer.events.triggerEvent("afterfeaturemodified",
                                           {feature: feature});
        this.layer.drawFeature(feature);
    },
    CLASS_NAME: "OpenLayers.Control.NoticeControl"
});

how to use:

var polyOptions = {sides: 4};
var noticeControl = new OpenLayers.Control.NoticeControl(polygonLayer, OpenLayers.Handler.RegularPolygon,
                                            {handlerOptions: polyOptions});
map.addControl(noticeControl);

hope that works

Tino

----- Original Nachricht ----
Von:     Brad Spencer <bradspencer at ozemail.com.au>
An:      brad at numaps.com.au, users at openlayers.org
Datum:   11.07.2010 15:23
Betreff: Re: [OpenLayers-Users] RegularPolygon as a search polygon

> Guys,
> 
>  
> 
> Still need some help on this.
> 
>  
> 
> I have taken the simple app from examples and edited it to see if I can
> make
> this work. It works but not the way I expect it to work?
> 
>  
> 
> See : http://staging.demos.numaps.com.au/shape_tester.html
> 
>  
> 
> I have extended the DrawFeature control to echo out the coordinates of the
> vector generated polygon. When the control is deactivated (controlled by
> the
> 'navigate' radio) the notice function is triggered - not sure why? 
> 
> I am trying to trigger this function only when the control is activated. 
> 
>  
> 
> Its just not doing what I would have expected so I must be doing something
> really stupid. 
> 
>  
> 
> Can someone have a quick look at this for me?
> 
>  
> 
> Cheers.
> 
>  
> 
> Brad..
> 
>  
> 
> From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] On
> Behalf Of Brad Spencer
> Sent: Friday, July 09, 2010 9:12 PM
> To: openlayers users
> Subject: [OpenLayers-Users] RegularPolygon as a search polygon
> 
>  
> 
> Guys,
> 
>  
> 
> I have been able to build a control to freehand digitize a polygon and then
> launch a function to use the polygon as a search polygon in a WFS request. 
> 
>  
> 
> This works for me:
> 
>  
> 
> drawControls = new OpenLayers.Control.DrawFeature(vectorLayer,
> OpenLayers.Handler.Polygon) ;
> 
>                 // extend the drawcontrol with its behavior
> 
>                 OpenLayers.Util.extend(drawControls, 
> 
>                 {              draw: function (){
> 
> this.polygon = new OpenLayers.Handler.Polygon(drawControls,{"done":
> this.notice});                this.polygon.activate();},
> 
>                                 notice: function (polygon)
> 
>                                 {
> 
>                                                 // get vertices of polygon
> into and array of coordinate pairs
> 
>                                                 var polyString =
> polygon.toString() ;
> 
>                                                 
> 
>                                                 // do whatever with polygon
> linestring here
> 
> .                             
> 
>                                 }
> 
>                 });              
> 
>    map.addControl(drawControls);
> 
>  
> 
>  
> 
> I wanted to use the RegularPolygon feature to do the same but it does not
> launch the function in the same way after the vector geometry is
> successfully created.  
> 
>  
> 
> var polyType = 6;
> 
> var rad = '';
> 
> polyOptions = {sides: polyType, radius: rad, angle: 0}
> 
> shapeControl = new OpenLayers.Control.DrawFeature(vectorLayer,
> OpenLayers.Handler.RegularPolygon, {handlerOptions: polyOptions});
> 
>                 // extend the shapeControl with its behavior
> 
>                 OpenLayers.Util.extend(shapeControl, 
> 
>                 {              draw: function (){
> 
>                                 this.polygon = new
> OpenLayers.Handler.RegularPolygon(shapeControl, {"done": this.notice});
> this.polygon.activate();},
> 
>                                 notice: function (polygon)
> 
>                                 {
> 
>                                                 // get vertices of polygon
> into and array of coordinate pairs
> 
>                                                 var polyString =
> polygon.toString() ;
> 
>                                                 // do whatever with polygon
> linestring here
> 
>                                                 .
> 
> 
>                                 }
> 
>                  });
> 
>  
> 
> In both cases the polygon is created and drawn to the vectorLayer.
> 
>  
> 
> Can anyone see anything obviously wrong with the second piece of code?
> 
>  
> 
> Cheers,
> 
>  
> 
> Brad Spencer
> 
> General Manager 
> 
> NuMaps
> 
> "DemographicDrapes"
> 
> www.numaps.com.au
> 
> brad at numaps.com.au
> 
> 0404 841 131
> 
> (02)9481 7024
> 
>  
> 
> "DemographicDrapes
> <http://www.numaps.com.au/numaps/index.cfm/resources/resources/apps4nsw-comp
> 
> etition-winner/>  wins NSW award"
> 
>  
> 
> 
> 
> --------------------------------
> 
> _______________________________________________
> Users mailing list
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> 

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