Hi Just a final conclusion.
I use the graticule to display the grid on map http://dev.openlayers.org/releases/OpenLayers-2.12/doc/apidocs/files/OpenLayers/Control/Graticule-js.html and restrict the display area on the map maxExtent: new OpenLayers.Bounds(-180, -90, 180, 90), restrictedExtent: new OpenLayers.Bounds(-180, -90, 180, 90) So here is the final one. map = new OpenLayers.Map( 'map', { controls: [ graticuleCtl, new OpenLayers.Control.PanZoom(), new OpenLayers.Control.EditingToolbar(vlayer) ], zoomOffset:14, maxExtent: new OpenLayers.Bounds(-180, -90, 180, 90), restrictedExtent: new OpenLayers.Bounds(-180, -90, 180, 90) }); var nav = new OpenLayers.Control.NavigationHistory(); // parent control must be added to the map map.addControl(nav); map.events.register('zoomend', map, function(e){ if(map.getZoom()<3){ //map.zoomTo(3); nav.previousTrigger(); } }); Hope this will help others. Regards, Hua Jie On Tue, Mar 12, 2013 at 3:47 PM, 杨华杰 <yhj...@gmail.com> wrote: > It's a solution but not perfect, user still able to draw outside of the > range. > > > On Tue, Mar 12, 2013 at 8:14 AM, Sergeant_york > <electronicpa...@gmail.com>wrote: > >> If your problem is not being able to restrict people to draw outside of >> defined borders, there is a much more easier solution by the way (inside >> of >> drawing borders =) ) >> >> You can restrict OpenLayers.Map object's extent: >> >> http://dev.openlayers.org/docs/files/OpenLayers/Map-js.html >> restrictedExtent {<OpenLayers.Bounds>|Array} If provided as an >> array, the >> array should consist of four values (left, bottom, right, top). >> >> >> Code can be like that: >> >> map.setOptions({restrictedExtent: map.getMaxExtent()}); >> >> >> >> >> >> >> -- >> View this message in context: >> http://osgeo-org.1560.n6.nabble.com/display-a-border-at-the-end-of-the-world-tp5039296p5039794.html >> Sent from the OpenLayers Users mailing list archive at Nabble.com. >> _______________________________________________ >> Users mailing list >> us...@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/openlayers-users >> > >
_______________________________________________ Users mailing list us...@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/openlayers-users
