Allow modify interaction to be configured with a source

examples/draw-and-modify-features.js

@@ -1,9 +1,8 @@
-goog.require('ol.Collection');
 goog.require('ol.Map');
 goog.require('ol.View');
-goog.require('ol.events.condition');
 goog.require('ol.interaction.Draw');
 goog.require('ol.interaction.Modify');
+goog.require('ol.interaction.Snap');
 goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.source.OSM');
@@ -17,18 +16,9 @@ var raster = new ol.layer.Tile({
   source: new ol.source.OSM()
 });
 
-var map = new ol.Map({
-  layers: [raster],
-  target: 'map',
-  view: new ol.View({
-    center: [-11000000, 4600000],
-    zoom: 4
-  })
-});
-
-var features = new ol.Collection();
-var featureOverlay = new ol.layer.Vector({
-  source: new ol.source.Vector({features: features}),
+var source = new ol.source.Vector();
+var vector = new ol.layer.Vector({
+  source: source,
   style: new ol.style.Style({
     fill: new ol.style.Fill({
       color: 'rgba(255, 255, 255, 0.2)'
@@ -45,38 +35,40 @@ var featureOverlay = new ol.layer.Vector({
     })
   })
 });
-featureOverlay.setMap(map);
 
-var modify = new ol.interaction.Modify({
-  features: features,
-  // the SHIFT key must be pressed to delete vertices, so
-  // that new vertices can be drawn at the same position
-  // of existing vertices
-  deleteCondition: function(event) {
-    return ol.events.condition.shiftKeyOnly(event) &&
-        ol.events.condition.singleClick(event);
-  }
+var map = new ol.Map({
+  layers: [raster, vector],
+  target: 'map',
+  view: new ol.View({
+    center: [-11000000, 4600000],
+    zoom: 4
+  })
 });
+
+var modify = new ol.interaction.Modify({source: source});
 map.addInteraction(modify);
 
-var draw; // global so we can remove it later
+var draw, snap; // global so we can remove them later
 var typeSelect = document.getElementById('type');
 
-function addInteraction() {
+function addInteractions() {
   draw = new ol.interaction.Draw({
-    features: features,
+    source: source,
     type: /** @type {ol.geom.GeometryType} */ (typeSelect.value)
   });
   map.addInteraction(draw);
-}
+  snap = new ol.interaction.Snap({source: source});
+  map.addInteraction(snap);
 
+}
 
 /**
  * Handle change event.
  */
 typeSelect.onchange = function() {
   map.removeInteraction(draw);
-  addInteraction();
+  map.removeInteraction(snap);
+  addInteractions();
 };
 
-addInteraction();
+addInteractions();