Imports cased like the filename

src/ol/interaction/DragRotateAndZoom.js

@@ -0,0 +1,148 @@
+goog.provide('ol.interaction.DragRotateAndZoom');
+
+goog.require('ol');
+goog.require('ol.RotationConstraint');
+goog.require('ol.ViewHint');
+goog.require('ol.events.condition');
+goog.require('ol.interaction.Interaction');
+goog.require('ol.interaction.Pointer');
+
+
+/**
+ * @classdesc
+ * Allows the user to zoom and rotate the map by clicking and dragging
+ * on the map.  By default, this interaction is limited to when the shift
+ * key is held down.
+ *
+ * This interaction is only supported for mouse devices.
+ *
+ * And this interaction is not included in the default interactions.
+ *
+ * @constructor
+ * @extends {ol.interaction.Pointer}
+ * @param {olx.interaction.DragRotateAndZoomOptions=} opt_options Options.
+ * @api
+ */
+ol.interaction.DragRotateAndZoom = function(opt_options) {
+
+  var options = opt_options ? opt_options : {};
+
+  ol.interaction.Pointer.call(this, {
+    handleDownEvent: ol.interaction.DragRotateAndZoom.handleDownEvent_,
+    handleDragEvent: ol.interaction.DragRotateAndZoom.handleDragEvent_,
+    handleUpEvent: ol.interaction.DragRotateAndZoom.handleUpEvent_
+  });
+
+  /**
+   * @private
+   * @type {ol.EventsConditionType}
+   */
+  this.condition_ = options.condition ?
+    options.condition : ol.events.condition.shiftKeyOnly;
+
+  /**
+   * @private
+   * @type {number|undefined}
+   */
+  this.lastAngle_ = undefined;
+
+  /**
+   * @private
+   * @type {number|undefined}
+   */
+  this.lastMagnitude_ = undefined;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.lastScaleDelta_ = 0;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.duration_ = options.duration !== undefined ? options.duration : 400;
+
+};
+ol.inherits(ol.interaction.DragRotateAndZoom, ol.interaction.Pointer);
+
+
+/**
+ * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
+ * @this {ol.interaction.DragRotateAndZoom}
+ * @private
+ */
+ol.interaction.DragRotateAndZoom.handleDragEvent_ = function(mapBrowserEvent) {
+  if (!ol.events.condition.mouseOnly(mapBrowserEvent)) {
+    return;
+  }
+
+  var map = mapBrowserEvent.map;
+  var size = map.getSize();
+  var offset = mapBrowserEvent.pixel;
+  var deltaX = offset[0] - size[0] / 2;
+  var deltaY = size[1] / 2 - offset[1];
+  var theta = Math.atan2(deltaY, deltaX);
+  var magnitude = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
+  var view = map.getView();
+  if (view.getConstraints().rotation !== ol.RotationConstraint.disable && this.lastAngle_ !== undefined) {
+    var angleDelta = theta - this.lastAngle_;
+    ol.interaction.Interaction.rotateWithoutConstraints(
+        view, view.getRotation() - angleDelta);
+  }
+  this.lastAngle_ = theta;
+  if (this.lastMagnitude_ !== undefined) {
+    var resolution = this.lastMagnitude_ * (view.getResolution() / magnitude);
+    ol.interaction.Interaction.zoomWithoutConstraints(view, resolution);
+  }
+  if (this.lastMagnitude_ !== undefined) {
+    this.lastScaleDelta_ = this.lastMagnitude_ / magnitude;
+  }
+  this.lastMagnitude_ = magnitude;
+};
+
+
+/**
+ * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
+ * @return {boolean} Stop drag sequence?
+ * @this {ol.interaction.DragRotateAndZoom}
+ * @private
+ */
+ol.interaction.DragRotateAndZoom.handleUpEvent_ = function(mapBrowserEvent) {
+  if (!ol.events.condition.mouseOnly(mapBrowserEvent)) {
+    return true;
+  }
+
+  var map = mapBrowserEvent.map;
+  var view = map.getView();
+  view.setHint(ol.ViewHint.INTERACTING, -1);
+  var direction = this.lastScaleDelta_ - 1;
+  ol.interaction.Interaction.rotate(view, view.getRotation());
+  ol.interaction.Interaction.zoom(view, view.getResolution(),
+      undefined, this.duration_, direction);
+  this.lastScaleDelta_ = 0;
+  return false;
+};
+
+
+/**
+ * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
+ * @return {boolean} Start drag sequence?
+ * @this {ol.interaction.DragRotateAndZoom}
+ * @private
+ */
+ol.interaction.DragRotateAndZoom.handleDownEvent_ = function(mapBrowserEvent) {
+  if (!ol.events.condition.mouseOnly(mapBrowserEvent)) {
+    return false;
+  }
+
+  if (this.condition_(mapBrowserEvent)) {
+    mapBrowserEvent.map.getView().setHint(ol.ViewHint.INTERACTING, 1);
+    this.lastAngle_ = undefined;
+    this.lastMagnitude_ = undefined;
+    return true;
+  } else {
+    return false;
+  }
+};