block an event a little,
and please use it.
[Source]
...........
checkSW = new LatLng(south, west);
checkNE = new LatLng(north, east);
currentBounds = new LatLngBounds(checkSW, checkNE);
this.map.removeEventListener(MapMoveEvent.MOVE_END,
stopDragging); ///////this
this.map.setCenter(currentBounds.getCenter());
this.map.addEventListener(MapMoveEvent.MOVE_END,
stopDragging); ///////this
return;
...........
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카페 : http://cafe.naver.com/gisapplication
싸이월드: http://www.cyworld.com/srhong007
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On 5월29일, 오전6시01분, Owen <[email protected]> wrote:
> Hey everyone, me again :)
>
> I have my zoom levels restricted and my polygon drawn for the
> boundary, and that all works great. Now what I'd like to do is
> restrict the user from dragging past that boundary. I found an example
> in Javascript that I tried to follow, and I seem to have it now. My
> main issue is that it runs extremely slow, and debugging in Flex shows
> that the event running the function loops until it crashes. The
> example I followed was fast enough that I never noticed it going
> beyond the bounds and snapping back.
> So I'd like to "check my math" as it were and see what I can do to
> improve it.
>
> Here's the event listener:
>
> this.map.addEventListener(MapMoveEvent.MOVE_END, stopDragging);
>
> The function it calls:
>
> private function stopDragging(e:Event):void {
> checkBoundsFunc();
>
> }
>
> And the actual code:
>
> private function checkBoundsFunc():void {
> trace("******** CHECK BOUNDS ********");
> // Perform the check and return if OK
> var currentBounds:LatLngBounds = this.map.getLatLngBounds();
> var allowedBounds:LatLngBounds = new LatLngBounds(_southWest,
> _northEast);
> var north:Number = currentBounds.getNorth();
> var south:Number = currentBounds.getSouth();
> var east:Number = currentBounds.getEast()
> var west:Number = currentBounds.getWest();
> var AmaxX:Number = allowedBounds.getNorthEast().lng();
> var AmaxY:Number = allowedBounds.getNorthEast().lat();
> var AminX:Number = allowedBounds.getSouthWest().lng();
> var AminY:Number = allowedBounds.getSouthWest().lat();
>
> // now check if the current rectangle in the allowed area
> var checkSW:LatLng = new LatLng(south, west);
> var checkNE:LatLng = new LatLng(north, east);
>
> if (allowedBounds.containsLatLng(checkSW) &&
> allowedBounds.containsLatLng(checkNE)) {
> trace("nothing to do");
> return;
> }else{
> if (west < AminX) {
> west = AminX;
> }
> if (east > AmaxX) {
> east = AmaxX;
> }
> if (south < AminY) {
> south = AminY;
> }
> if (north > AmaxY) {
> north = AmaxY;
> }
> checkSW = new LatLng(south, west);
> checkNE = new LatLng(north, east);
> currentBounds = new LatLngBounds(checkSW, checkNE);
>
> this.map.setCenter(currentBounds.getCenter());
> return;
> }
>
> }
>
> _southWest and _northEast are the respective corners of
> this.map.getLatLngBounds(). I've seen it mentioned somewhere that
> setting the center in this function can cause an infinite loop, but
> I'm not sure where else I could put it and call it when appropriate
> without it happening in a loop.
>
> Any help or insight is appreciated!
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