Revert "Allow for using a different set of default behaviors."

This reverts commit 3cc069186c.

src/ol/handler/Drag.js

@@ -95,19 +95,25 @@ ol.handler.Drag.prototype.handleDragStart = function(e) {
 ol.handler.Drag.prototype.handleDrag = function(e) {
     this.states_.dragged = true;
     var newE = new ol.events.MapEvent(ol.events.MapEventType.DRAG, e);
-    newE.deltaX = e.clientX - this.prevX_;
-    newE.deltaY = e.clientY - this.prevY_;
+    newE.delementaX = e.clientX - this.prevX_;
+    newE.delementaY = e.clientY - this.prevY_;
     this.prevX_ = e.clientX;
     this.prevY_ = e.clientY;
     var rt = goog.events.dispatchEvent(this.map_, newE);
     if (rt) {
-        var defaultControl = this.map_.getDefaultControl();
-        if (defaultControl) {
-            defaultControl.defaultDrag(newE);
-        }
+        this.defaultDrag(newE);
     }
 };
 
+/**
+ * @param {ol.events.MapEvent} e
+ */
+ol.handler.Drag.prototype.defaultDrag = function(e) {
+    var delementaX = /** @type {number} */ e.delementaX;
+    var delementaY = /** @type {number} */ e.delementaY;
+    this.map_.moveByViewportPx(delementaX, delementaY);
+};
+
 /**
  * @param {goog.fx.DragEvent} e
  */

src/ol/handler/MapHandler.js

@@ -4,7 +4,7 @@
  * Type definitions and base class for map event handlers that share states,
  * listen for events on a map related dom element (usually the map's viewport),
  * dispatch events to an ol.Map instance, and optionally perform default
- * actions on the map's default control.
+ * actions on an ol.Map instance.
  */
 
 goog.provide('ol.handler.states');

src/ol/handler/MouseWheel.js

@@ -47,9 +47,28 @@ ol.handler.MouseWheel.prototype.handleMouseWheel = function(e) {
     var newE = new ol.events.MapEvent(ol.events.MapEventType.MOUSEWHEEL, e);
     var rt = goog.events.dispatchEvent(this.map_, newE);
     if (rt) {
-        var defaultControl = this.map_.getDefaultControl();
-        if (defaultControl) {
-            defaultControl.defaultMouseWheel(newE);
-        }
+        this.defaultMouseWheel(e);
     }
-};
+};
+
+/**
+ * @param {goog.events.MouseWheelEvent} e
+ */
+ol.handler.MouseWheel.prototype.defaultMouseWheel = function(e) {
+    var me = this;
+    if (e.deltaY === 0 || me.zoomBlocked_) {
+        return;
+    }
+    me.zoomBlocked_ = window.setTimeout(function() {
+        me.zoomBlocked_ = null;
+    }, 200);
+
+    var map = me.map_,
+        step = e.deltaY / Math.abs(e.deltaY);
+    map.setZoom(map.getZoom() - step,
+                goog.style.getRelativePosition(e, this.element_));
+
+    // We don't want the page to scroll.
+    // (MouseWheelEvent is a BrowserEvent)
+    e.preventDefault();
+};