I'm a tad confused here. Is none of this possible in 2.7?
Matt
Josh Rosenthal wrote:
D'oh! Yes, that should have been obvious. Either use whatever is
being triggered by the modify callback, or set a custom one if the
control isn't already using one.
Much obliged,
Josh
On Wed, Apr 22, 2009 at 4:35 PM, Andreas Hocevar <[email protected]
<mailto:[email protected]>> wrote:
Josh Rosenthal wrote:
Thanks a lot for the solution using callbacks. I was
wondering if you could suggest how that might be adapted to
give the measurements on a draw feature. It's much easier
than what I was previously doing for measure and drawFeature
(passing a customized modifyFeature function in the options,
where the new function was the same as the original, but also
had the requisite getLength statements - functional, but it
seems like this should be far more version dependent than the
callback solution).
When I try to use callbacks-modify on a drawFeature (as
below), my modify callback doesn't seem to get used (the
console.log(this) never fires). I assume this is because
measureControls didn't already use a modify callback, whereas
drawFeature does, and as such drawFeature overrides any modify
callback I might try to pass in? Is there any way to append
to the normal modify callback? Am I missing something obvious?
The best way to achieve this would be to listen for the
sketchmodified event of the DrawFeature control. this is what
actually gets triggered in the modify callback of the handler that
is configured with DrawFeature.
Regards,
Andreas.
Thanks!
Josh
broken: uses callbacks - modify: selectDrawCircle = new
OpenLayers.Control.DrawFeature(selectLayerPoly,
OpenLayers.Handler.RegularPolygon,{
displayClass:"olControlSelectDrawCircle",
element:document.getElementById('SelectControl_Distance'),
unitElement:document.getElementById('SelectControl_mapUnit'),
callbacks:{
modify: function (point,feature) {
console.log(this);
this.element.value=this.radius.toFixed(2);
this.unitElement.innerHTML=this.map.getUnits();
}
},
handlerOptions:{
sides:40
}
});
functional: uses slightly
customized modifyGeometry function passed in as an option
selectDrawCircle = new
OpenLayers.Control.DrawFeature(selectLayerPoly,
OpenLayers.Handler.RegularPolygon,{
displayClass:"olControlSelectDrawCircle",
handlerOptions:{
sides:40,
element:document.getElementById('SelectControl_Distance'),
unitElement:document.getElementById('SelectControl_mapUnit'),
modifyGeometry: function() {
var angle, dx, dy, point;
var ring =
this.feature.geometry.components[0];
// if the number of sides
ever changes, create a new geometry
if(ring.components.length
!= (this.sides + 1)) {
this.createGeometry();
ring =
this.feature.geometry.components[0];
}
for(var i=0; i<this.sides;
++i) {
point = ring.components[i];
angle = this.angle + (i
* 2 * Math.PI / this.sides);
point.x = this.origin.x
+ (this.radius * Math.cos(angle));
point.y = this.origin.y
+ (this.radius * Math.sin(angle));
point.clearBounds();
}
// note, only val b/c this
is an input field.
this.element.value=this.radius.toFixed(2);
this.unitElement.innerHTML=this.map.getUnits();
}
}});
On Wed, Apr 22, 2009 at 8:22 AM, Andreas Hocevar
<[email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>>
wrote:
Hi,
the solution (if you're using trunk or 2.8) is quite
simple. The snippet
below replaces the definition of measureControls in the
measure example
(starting around L65)
measureControls = {
line: new OpenLayers.Control.Measure(
OpenLayers.Handler.Path, {
callbacks: {
modify: function(point, feature) {
measureControls.line.measurePartial(point,
feature.geometry);
}
},
persist: true,
handlerOptions: {
layerOptions: {styleMap: styleMap}
}
}
),
polygon: new OpenLayers.Control.Measure(
OpenLayers.Handler.Polygon, {
callbacks: {
modify: function(point, feature) {
measureControls.polygon.measurePartial(point,
feature.geometry);
}
},
persist: true,
handlerOptions: {
layerOptions: {styleMap: styleMap}
}
}
)
};
As you can see, the trick is to add a modify callback to
the handler,
calling the control's measurePartial method.
Regards,
Andreas.
pribram pribram wrote:
> Hi,
> Is there anything new about measuring + getting distance on
mousemove?
>
http://n2.nabble.com/Measure-Control---get-distance-on-mouse-move-td2503580.html
> If there is a solution, please publish it.
>
> Thanks,
> Pribram
> _______________________________________________
> Users mailing list
> [email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>
> http://openlayers.org/mailman/listinfo/users
>
--
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.
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OpenGeo - http://opengeo.org/
Expert service straight from the developers.
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