initial commit

node_modules/vis/lib/hammerUtil.js

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+/**
+ * Register a touch event, taking place before a gesture
+ * @param {Hammer} hammer       A hammer instance
+ * @param {function} callback   Callback, called as callback(event)
+ */
+exports.onTouch = function (hammer, callback) {
+  callback.inputHandler = function (event) {
+    if (event.isFirst) {
+      callback(event);
+    }
+  };
+
+  hammer.on('hammer.input', callback.inputHandler);
+};
+
+/**
+ * Register a release event, taking place after a gesture
+ * @param {Hammer} hammer       A hammer instance
+ * @param {function} callback   Callback, called as callback(event)
+ * @returns {*}
+ */
+exports.onRelease = function (hammer, callback) {
+  callback.inputHandler = function (event) {
+    if (event.isFinal) {
+      callback(event);
+    }
+  };
+
+  return hammer.on('hammer.input', callback.inputHandler);
+};
+
+
+/**
+ * Unregister a touch event, taking place before a gesture
+ * @param {Hammer} hammer       A hammer instance
+ * @param {function} callback   Callback, called as callback(event)
+ */
+exports.offTouch = function (hammer, callback) {
+  hammer.off('hammer.input', callback.inputHandler);
+};
+
+/**
+ * Unregister a release event, taking place before a gesture
+ * @param {Hammer} hammer       A hammer instance
+ * @param {function} callback   Callback, called as callback(event)
+ */
+exports.offRelease = exports.offTouch;
+
+/**
+ * Hack the PinchRecognizer such that it doesn't prevent default behavior
+ * for vertical panning.
+ *
+ * Yeah ... this is quite a hack ... see https://github.com/hammerjs/hammer.js/issues/932
+ *
+ * @param {Hammer.Pinch} pinchRecognizer
+ * @return {Hammer.Pinch} returns the pinchRecognizer
+ */
+exports.disablePreventDefaultVertically = function (pinchRecognizer) {
+  var TOUCH_ACTION_PAN_Y = 'pan-y';
+
+  pinchRecognizer.getTouchAction = function() {
+    // default method returns [TOUCH_ACTION_NONE]
+    return [TOUCH_ACTION_PAN_Y];
+  };
+
+  return pinchRecognizer;
+};