[OpenLayers-Users] disable Zoom-in function?

[Erik Uzureau]

Hi Xiaopeng

The way to do this is, like chris said, inside
OpenLayers.Control.MouseDefaults. You need  to override the
zoomBoxEnd() function.

The easiest way to do this is like this:

    OpenLayers.Control.MouseDefaults.prototype.zoomBoxEnd = function (evt) {

    if (this.mouseDragStart != null) {

        // Ripped from MouseDefaults.js
            var start = this.map.getLonLatFromViewPortPx(
                            this.mouseDragStart );
            var end = this.map.getLonLatFromViewPortPx( evt.xy );
            var top = Math.max(start.lat, end.lat);
            var bottom = Math.min(start.lat, end.lat);
            var left = Math.min(start.lon, end.lon);
            var right = Math.max(start.lon, end.lon);
            var bounds = new OpenLayers.Bounds(left, bottom,
                                                  right, top);
        // End rip.

        // Do whatever you want to do here

         // remove the zoombox
         this.removeZoomBox();

        }
    }
}



On 12/11/06, Christopher Schmidt <crschmidt at metacarta.com> wrote:
> On Mon, Dec 11, 2006 at 03:37:33PM -0500, Xiaopeng Xiong wrote:
> > I am curious is it possible to disable the functionality of zoom-in when a
> > user draws a rectangluar region using mouse?
> > My application just wants users to draw a query region on the map instead of
> > have the map zoomed in...
>
> This would be a non-trivial modification to
> OpenLayers.Control.MouseDefaults. I suggest you read and understand the
> code there to start: if you have questions on it, please feel free to
> come back to the list for explanations.
>
> Regards,
> --
> Christopher Schmidt
> MetaCarta
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