Merge pull request #244 from fredj/zoom-control

Zoom control

css/ol.css

@@ -63,14 +63,17 @@
 .ol-zoom a:hover {
   background: rgba(0,60,136,0.7);
 }
-@media only screen and (max-width:600px) {
-  .ol-zoom a:hover {
-    background: rgba(0,60,136,0.5);
-  }
-}
+
 .ol-zoom-in {
   border-radius: 2px 2px 0 0;
 }
+.ol-zoom-in:before {
+  content: "+";
+}
+
 .ol-zoom-out {
   border-radius: 0 0 2px 2px;
 }
+.ol-zoom-out:before {
+  content: "\2212";
+}

src/ol/control/zoomcontrol.js

@@ -30,13 +30,13 @@ ol.control.Zoom = function(zoomOptions) {
   var inElement = goog.dom.createDom(goog.dom.TagName.A, {
     'href': '#zoomIn',
     'class': 'ol-zoom-in'
-  }, '+');
+  });
   goog.events.listen(inElement, eventType, this.handleIn_, false, this);
 
   var outElement = goog.dom.createDom(goog.dom.TagName.A, {
     'href': '#zoomOut',
     'class': 'ol-zoom-out'
-  }, '\u2212');
+  });
   goog.events.listen(outElement, eventType, this.handleOut_, false, this);
 
   var element = goog.dom.createDom(