Hi,
I implemented a little extension into snapping control. Could someone
please help me to do it a little smarter looking (and functioning) and
maybe you could give me some feedback; does this extension make any
sense. I don't know how to use OL Class framework. This is how I got
this working anyway. Don't tell this kind of feature is already
implemented ;-)
So, if you set snapToOrtho on true, you can only draw vertical and
horizontal lines. Still the original snap will override this.
Or should I ask from developers list?
- mika -
Anyway, here you go:
OpenLayers.Control.SnappingPlus =
OpenLayers.Class(OpenLayers.Control.Snapping, {
snapToOrtho: false,
setSnapToOrtho: function (ortho) { ortho ? this.snapToOrtho
= true : this.snapToOrtho = false },
CLASS_NAME: "OpenLayers.Control.SnappingPlus"
});
OpenLayers.Control.SnappingPlus.prototype.onSketchModified
= function (event) {
this.feature = event.feature;
if (this.snapToOrtho) {
var result, target;
for (var i = 0, len = this.targets.length; i < len;
++i) {
target = this.targets[i];
result = this.testTarget(target, event.vertex);
if (!result) {
var comp = this.feature.geometry.components;
var prevpoint;
comp.length > 1 ? prevpoint = comp[comp.length
- 2] : prevpoint = event.vertex;
Math.abs(event.vertex.x - prevpoint.x) >
Math.abs(event.vertex.y - prevpoint.y) ? event.vertex.y = prevpoint.y :
event.vertex.x = prevpoint.x;
break;
}
}
}
this.considerSnapping(event.vertex, event.vertex);
}
_______________________________________________
Users mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/openlayers-users
