Merge pull request #5887 from felixveysseyre/interactive-overview-map

Interactive overview map

css/ol.css

@@ -239,3 +239,7 @@
 .ol-overviewmap-box {
   border: 2px dotted rgba(0,60,136,0.7);
 }
+
+.ol-overviewmap .ol-overviewmap-box:hover {
+  cursor: move;
+}

src/ol/control/overviewmap.js

@@ -148,6 +148,44 @@ ol.control.OverviewMap = function(opt_options) {
     render: render,
     target: options.target
   });
+
+  /* Interactive map */
+
+  var scope = this;
+
+  var overlay = this.boxOverlay_;
+  var overlayBox = this.boxOverlay_.getElement();
+
+  /* Functions definition */
+
+  var computeDesiredMousePosition = function(mousePosition) {
+    return {
+      clientX: mousePosition.clientX - (overlayBox.offsetWidth / 2),
+      clientY: mousePosition.clientY + (overlayBox.offsetHeight / 2)
+    };
+  };
+
+  var move = function(event) {
+    var coordinates = ovmap.getEventCoordinate(computeDesiredMousePosition(event));
+
+    overlay.setPosition(coordinates);
+  };
+
+  var endMoving = function(event) {
+    var coordinates = ovmap.getEventCoordinate(event);
+
+    scope.getMap().getView().setCenter(coordinates);
+
+    window.removeEventListener('mousemove', move);
+    window.removeEventListener('mouseup', endMoving);
+  };
+
+  /* Binding */
+
+  overlayBox.addEventListener('mousedown', function() {
+    window.addEventListener('mousemove', move);
+    window.addEventListener('mouseup', endMoving);
+  });
 };
 ol.inherits(ol.control.OverviewMap, ol.control.Control);