Ok I've managed to do the first thing by looking on the examples.
I think there must be a better ways to do this just like you draw the
"point" on the layer
so this is what i've done:
OpenLayers.Event.observe($('map'),"click",mapclicked.bindAsEventListener(map));
function mapclicked(e){
var lonlat = map.getLonLatFromPixel(e.xy);
var shape = "POLYGON(("+(lonlat.lon-5)+" "+(lonlat.lat-5)+",
"+(lonlat.lon-5)+" "+(lonlat.lat+5)+", "+(lonlat.lon+5)+"
"+(lonlat.lat+5)+", "+(lonlat.lon+5)+" "+(lonlat.lat-5)+"))";
//shape = "POINT("+lonlat.lon+" " +lonlat.lat+")";
//load shape
loadVector(shape);
};
function loadVector(coords) {
var features = formats['in']['wkt'].read(coords);
var bounds;
if(features) {
if(features.constructor != Array) {
features = [features];
}
for(var i=0; i<features.length; ++i) {
if (!bounds) {
bounds = features[i].geometry.getBounds();
} else {
bounds.extend(features[i].geometry.getBounds());
}
}
vectors.addFeatures(features);
var plural = (features.length > 1) ? 's' : '';
//alert( features.length + ' feature' + plural + ' added' );
} else {
alert( 'Bad input ' + type );
}
}
the curser place is from the "Cursor Example"
and the load vector method is original from the "deserialize" of the "Vector
Formats Example"
if i want it to work like the radio buttons examples I should add an if
statment in the function mapclicked to check if it's checked.
its working but not like the way the "OpenLayers" implment it.
how can i integred it with the toggleControl function?
and still i have the second, drag, issue
2010/11/26 jumpNg mo0 <[email protected]>
> Hello list
> I'm using this example to draw new vectors
> http://openlayers.org/dev/examples/drag-feature.html
>
> I have some issues
>
> 1. How do I create another option to contain a Polygon with a specific size
> I'm choosing
> for example, when I check the "box" radio option, a new radio button for
> this case, it will draw a whole shape, a squre 10x10, where ever I click on
> the map.
> so if I'll clicl on the (0, 0) point is will be that POLYGON((0 0, 0 10, 10
> 10, 10 0)) and on every other point the fixed coordinates for the 10x10
> square POLYGON.
>
> 2. I want to make sure that, when I draw new vectors OR when I drag
> existence vectors, the vectors could not get run over by another vector.
> instead, I want it to not to create the new vector and maybe run an error
> (alert) OR to stop the draging at the touching point (the way the mouse
> pointer came from).
>
> -----------------
> jumpNg
>
> --
> -----------------
> jumpNg
>
--
-----------------
jumpNg
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