diff --git a/src/renderer/components/ToolLayer.vue b/src/renderer/components/ToolLayer.vue
index c5dfb24..77d590d 100644
--- a/src/renderer/components/ToolLayer.vue
+++ b/src/renderer/components/ToolLayer.vue
@@ -56,7 +56,11 @@ You should have received a copy of the GNU General Public License along with FG
       },
       drawPolyline () {
         var polyLine = this.$parent.mapObject.editTools.startPolygon(undefined, {color: 'green'})
+        var layerGroup = this.toolLayerGroup;
         polyLine.addTo(this.toolLayerGroup)
+        polyLine.on('editable:drawing:click', event => {
+          //polyLine.removeFrom(layerGroup);
+        });
         polyLine.on('editable:drawing:end', event => {          
           console.debug(event)
           var latLngs = event.target.getLatLngs()[0].map( latLng => ([latLng.lat, latLng.lng]));          
@@ -76,20 +80,39 @@ You should have received a copy of the GNU General Public License along with FG
                 angleLongest = angle;                
               }
             }
-          });
-          var point1 = turf.point([-75.343, 39.984]);
-          var point2 = turf.point([-75.534, 39.123]);
-
-          var bearing = turf.bearing(point1, point2);
-          console.log(bearing);
-          
-
+          });          
           event.target.bindTooltip(angleLongest.toFixed(2) + '°', {permanent: true})
 
           var ring = [latLngs];
 
           this.$emit('select-poly', ring);
         })
+        polyLine.on('editable:vertex:dragend', event => {          
+          console.debug(event)
+          var latLngs = event.target.getLatLngs()[0].map( latLng => ([latLng.lat, latLng.lng]));          
+
+
+          // turf rings must start/end with the same point
+          latLngs.push(latLngs[0]);
+          var longest = 0;
+          var angleLongest = 0;
+          latLngs.forEach((item, index, arr) => {
+            if (index > 0) {
+              var angle = turf.bearing(turf.point([arr[index-1][1], arr[index-1][0]]), turf.point([arr[index][1], arr[index][0]])) + 180;
+              
+              var dist = turf.distance( turf.point(arr[index-1]), turf.point(arr[index]));
+              if (dist>longest) {
+                longest = dist;
+                angleLongest = angle;                
+              }
+            }
+          });          
+          event.target.setTooltipContent(angleLongest.toFixed(2) + '°')
+
+          var ring = [latLngs];
+
+          this.$emit('select-poly', ring);
+        })
 
       },