javascript - Remove elements from Drawing manager overlay array -

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i working on map-based service. there user can select items on map drawing rectangles , polygons using drawingmanager. push these shapes global array after created keep control on them this:

      google.maps.event.addlistener(drawingmanager, 'overlaycomplete', function(e) {       if (e.type != google.maps.drawing.overlaytype.marker) {       // switch non-drawing mode after drawing shape.       drawingmanager.setdrawingmode(null);       var newshape = e.overlay;       all_overlays.push(newshape);       newshape.type = e.type;       newshape.id = all_overlays.length-1;       all_overlays[newshape.id].id = all_overlays.length-1; }

the user has option delete single shape. implemented deletion this:

function deleteselectedshape() { if (selectedshape) {     all_overlays.splice(selectedshape.id,1);     while(jquery.inarray(selectedshape.id, selected_shapes) != -1)         {         var shape_index = jquery.inarray(selectedshape.id, selected_shapes);         selected_shapes.splice(shape_index,1);         selected_buoys.splice(shape_index,1);         }     selectedshape.setmap(null);     selectedshape = '';     buildlist();     highlightselectedbuoys();    }

unfortunatly not working. if e.g. got array 4 shapes (ids:0,1,2,3) , delete array id=0, all_overlays array not change it's size, messes whole thing in next step. mistake?

forget newshape.id, the index of shape change after splice.

use indexof instead:

 all_overlays.splice(all_overlays.indexof(selectedshape),1);

the indexof() method returns first index @ given element can found in array, or -1 if not present. indexof compares searchelement elements of array using strict equality (the same method used ===, or triple-equals, operator). note splice nothing if pass -1 parameter.

complete example:

google.maps.event.addlistener(drawingmanager, 'overlaycomplete', function(e) {       if (e.type != google.maps.drawing.overlaytype.marker) {          // switch non-drawing mode after drawing shape.          drawingmanager.setdrawingmode(null);          var newshape = e.overlay;          all_overlays.push(newshape);          newshape.type = e.type;       } }  function deleteselectedshape() {     if (selectedshape) {         // here difference         all_overlays.splice(all_overlays.indexof(selectedshape),1);         // here maybe need same fix.         selected_shapes.splice(selected_shapes.indexof(selectedshape),1);         selected_buoys.splice(selected_buoys.indexof(selectedshape),1);         // remove map.         selectedshape.setmap(null);         selectedshape = ''; // maybe should undefined.         // stuffs         buildlist();         highlightselectedbuoys();        } }

note: not cross-browser due indexof not supported natively browsers. but can implement yourself. read this post support old browsers.


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