Hi,
I would like to extend the map viewport to create a "buffer zone"
around the viewport to show some markers.. and if the user navigate
out of the "buffer zone" I would like to load new markers. I know
there is a marker manager.. but i have to show 1mio markers on the
map.. so i think there is no way to reload the markers and but the new
ones on the map.
So how can I extend the viewport zone/ bounds ?
I created a class and with the following function i would like to
extend the viewport:
public function setLatLngBounds(value:LatLngBounds):void
{
var zoom:Number = this._map.getZoom();
var ne:LatLng = value.getNorthEast();
var sw:LatLng = value.getSouthWest();
// translate to pixel
var nePoint:Point = this._map.MERCATOR_PROJECTION.fromLatLngToPixel
(ne, zoom);
var swPoint:Point = this._map.MERCATOR_PROJECTION.fromLatLngToPixel
(sw, zoom);
// extend the map buffer zone
var nePoint2:Point = new Point(nePoint.x+1000, nePoint.y+1000);
var swPoint2:Point = new Point(swPoint.x+1000, swPoint.y+1000);
// translate to geo data
var ne2:LatLng = this._map.MERCATOR_PROJECTION.fromPixelToLatLng
(nePoint2, zoom);
var sw2:LatLng = this._map.MERCATOR_PROJECTION.fromPixelToLatLng
(swPoint2, zoom);
// create new bounds and set the "buffer zone"
var latLngBounds:LatLngBounds = new LatLngBounds(sw2, ne2);
this._mapLatLngBounds = latLngBounds;
}
private function handleMoveStep(e:MapMoveEvent):void
{
// check if the map is in the buffer zone
if( ! this._mapLatLngBounds.containsBounds
( this._map.getLatLngBounds()) ) {
trace("do something");
}
}
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