Hey-
toni hernández wrote:
> Hi all,
>
> I need to draw lines with only two vertexs so when the second vertex is
> added the draing must end.
>
If you want to use the existing code, your application could do
something like this (assuming you had a vector layer named "layer" and a
drawing control named "draw" with a path handler configured to draw on
that layer):
// using API properties and methods only
layer.events.on({
sketchmodified: function(event) {
var feature = event.feature;
if(feature.geometry.components.length > 2) {
feature = feature.clone();
var geom = feature.geometry;
geom.removeComponent(geom.component[2]);
draw.deactivate();
layer.addFeatures([feature]);
}
}
});
Untested, but something like that should work.
Tim
>
> I've done it so far creating a new handler.path where I control the
> length of the geometry components. When is bigger than 2 I run the
> finalize function so it ends.
> That works fine but I think there must be a better way of doing it?
>
> I have also tried registering the sketchmodified event of the control
> from the main html page.
>
> The issue here is that I do not know how to deactivate the drawing
> control without throwing and error. (feature is null, on Vector.js (line
> 617, in drawFeature function)
>
> any ideas?
>
> the code.
>
> //DRAWING CONTROLS
> drawControls = {
> point: new OpenLayers.Control.DrawFeature(pointLayer,
> OpenLayers.Handler.Point),
> line: new OpenLayers.Control.DrawFeature(lineLayer,
> OpenLayers.Handler.Path, options),
> polygon: new OpenLayers.Control.DrawFeature(polygonLayer,
> OpenLayers.Handler.Polygon, options)
> };
>
> for(var key in drawControls) {
> map.addControl(drawControls[key]);
> }
>
> //REGISTERING
> drawControls.line.layer.events.on({
> 'sketchmodified': report
> });
>
>
> function report(param)
> {
> if (param.feature.components.length>2)
> {
> drawControls.line.handler.finalize();
> }
> }
>
>
>
> ------------------------------------------------------------------------
>
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> http://openlayers.org/mailman/listinfo/dev
--
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.
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