[OpenLayers-Users] Storing vectors in OL
Andrew Larcombe
andrew at andrewlarcombe.co.uk
Fri May 11 06:25:01 EDT 2007
On 11 May 2007, at 10:07, Przemysław Bojczuk wrote:
> Hello, list!
>
> Since there is no (known to me) way to save drawn/edited vectors
> (as in
> http://openlayers.org/dev/examples/editingtoolbar.html) to any kind of
> file, is it possible to store them in a permalink? As far as I know,
> permalink only stores layers, extent and zoom, but could it be
> possible
> to extend it to store the drawn vectors as well?
>
You should be able to create a function which posts your drawn object
to a server where you can, for example, store it in a database for
future use. eg for a box you could do something like this (warning,
this code may not work ootb):
/******
var onBoxDrawn = function(box) {
//post the contents of box to the server
}
drawControl = new OpenLayers.Control();
OpenLayers.Util.extend(drawControl, {
draw: function () {
// this Handler.Box will intercept the shift-
mousedown
// before Control.MouseDefault gets to see it
this.box = new OpenLayers.Handler.Box( drawControl,
{"done": this.notice},
{keyMask: OpenLayers.Handler.MOD_SHIFT});
this.box.activate();
},
notice: onBoxDrawn
});
********/
add the drawControl to a panel, and add the panel to a map. This will
allow you to shift-drag a rectangle and when you've finished drawing
the onBoxDrawn function gets called.
Hope that makes sense.
Cheers,
Andrew
---
Andrew Larcombe
Freelance Geospatial, Database & Web Programming
web: http://www.andrewlarcombe.co.uk
email: andrew at andrewlarcombe.co.uk
icq: 306690163
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