No trackpad mode for constrained resolutions

src/ol/View.js

@@ -793,6 +793,13 @@ class View extends BaseObject {
     return this.constraints_;
   }
 
+  /**
+   * @return {boolean} Resolution constraint is set
+   */
+  getConstrainResolution() {
+    return this.options_.constrainResolution;
+  }
+
   /**
    * @param {Array<number>=} opt_hints Destination array.
    * @return {Array<number>} Hint.