Add option to disable first/last marker of polyline (ibrierley#44)

README.md

@@ -51,6 +51,8 @@ var polyEditor = PolyEditor(
   intermediateIcon: Icon(Icons.lens, size: 15, color: Colors.grey),
   callbackRefresh: () => { this.setState(() {})},
   addClosePathMarker: false, // set to true if polygon
+  addLineStartMarker: true, // set to false, to remove first marker of line
+  addLineEndMarker: true, // set to false, to remove last marker of line
 );
 ```
 

lib/src/poly_editor.dart

@@ -10,12 +10,16 @@ class PolyEditor {
   final Size intermediateIconSize;
   final void Function(LatLng? updatePoint)? callbackRefresh;
   final bool addClosePathMarker;
+  final bool addLineStartMarker;
+  final bool addLineEndMarker;
 
   PolyEditor({
     required this.points,
     required this.pointIcon,
     this.intermediateIcon,
     this.callbackRefresh,
+    this.addLineStartMarker = false,
+    this.addLineEndMarker = false,
     this.addClosePathMarker = false,
     this.pointIconSize = const Size(30, 30),
     this.intermediateIconSize = const Size(30, 30),
@@ -45,7 +49,11 @@ class PolyEditor {
   List<DragMarker> edit() {
     List<DragMarker> dragMarkers = [];
 
-    for (var c = 0; c < points.length; c++) {
+    final startC = addLineStartMarker || addClosePathMarker ? 0 : 1;
+    final endC = addLineEndMarker || addClosePathMarker
+        ? points.length
+        : points.length - 1;
+    for (var c = startC; c < endC; c++) {
       final indexClosure = c;
       dragMarkers.add(DragMarker(
         point: points[c],