Feat: limit markers to count

examples/simple.geo.json

@@ -0,0 +1,79 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {
+        "stroke": "#555555",
+        "stroke-width": 2,
+        "stroke-opacity": 1,
+        "fill": "#555555",
+        "fill-opacity": 0.5
+      },
+      "geometry": {
+        "coordinates": [
+          [
+            [
+              6.3198722284199675,
+              46.475212657477016
+            ],
+            [
+              5.744162894532366,
+              46.10709600323992
+            ],
+            [
+              6.497738039632395,
+              45.70237717844603
+            ],
+            [
+              7.134249175373981,
+              46.14082290891099
+            ],
+            [
+              6.448472560825223,
+              46.030608286903174
+            ],
+            [
+              6.3198722284199675,
+              46.475212657477016
+            ]
+          ]
+        ],
+        "type": "Polygon"
+      },
+      "id": 0
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "coordinates": [
+          6.146144956875389,
+          46.4506138274553
+        ],
+        "type": "Point"
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "coordinates": [
+          [
+            5.790034254132081,
+            46.35543828997646
+          ],
+          [
+            5.693917615455717,
+            46.240555677111445
+          ],
+          [
+            5.610702086380968,
+            46.37069535445781
+          ]
+        ],
+        "type": "LineString"
+      }
+    }
+  ]
+}

python/ipyleaflet/ipyleaflet/leaflet.py

@@ -660,9 +660,9 @@ class Tooltip(UILayer):
     offset: tuple, default (0, 0)
         Optional offset of the tooltip position (in pixels).
     direction: str, default 'auto'
-        Direction where to open the tooltip. 
-        Possible values are: right, left, top, bottom, center, auto. 
-        auto will dynamically switch between right and left according 
+        Direction where to open the tooltip.
+        Possible values are: right, left, top, bottom, center, auto.
+        auto will dynamically switch between right and left according
         to the tooltip position on the map.
     permanent: bool, default False
         Whether to open the tooltip permanently or only on mouseover.
@@ -2367,7 +2367,7 @@ class GeomanDrawControl(DrawControlBase):
     circlemarker = Dict({ 'pathOptions': {} }).tag(sync=True)
 
     # Hover style (applies for all drawing modes)
-    hover_style = Dict().tag(sync=True) 
+    hover_style = Dict().tag(sync=True)
 
     # Disabled by default
     text = Dict().tag(sync=True)
@@ -2378,6 +2378,8 @@ class GeomanDrawControl(DrawControlBase):
     cut = Bool(True).tag(sync=True)
     rotate = Bool(True).tag(sync=True)
 
+    limit_markers_to_count = Int(-1).tag(sync=True)
+
     def __init__(self, **kwargs):
         super(GeomanDrawControl, self).__init__(**kwargs)
         self.on_msg(self._handle_leaflet_event)
@@ -2420,7 +2422,7 @@ def on_click(self, callback, remove=False):
             Whether to remove this callback or not. Defaults to False.
         """
         self._click_callbacks.register_callback(callback, remove=remove)
-    
+
 
     def clear_text(self):
         """Clear all text."""

python/jupyter_leaflet/src/controls/GeomanDrawControl.ts

@@ -136,6 +136,8 @@ export class LeafletGeomanDrawControlView extends LeafletControlView {
     this.data_to_layers();
     this.map_view.obj.addLayer(this.feature_group);
 
+    this.setControlOptions();
+
     this.setMode();
 
     this.map_view.obj.on(
@@ -398,7 +400,13 @@ export class LeafletGeomanDrawControlView extends LeafletControlView {
       mode = mode.split(':')[1];
       this.map_view.obj.pm.enableDraw(mode, this.model.get(mode.toLowerCase()));
     } else if (mode == 'edit') {
-      this.map_view.obj.pm.enableGlobalEditMode();
+      let n_markers = this.model.get('limit_markers_to_count');
+      if (!n_markers) {
+        n_markers = -1;
+      }
+      this.map_view.obj.pm.enableGlobalEditMode({
+        limitMarkersToCount: n_markers
+      });
     } else if (mode == 'drag') {
       this.map_view.obj.pm.enableGlobalDragMode();
     } else if (mode == 'remove') {