Imports cased like the filename

2017-12-11 16:26:11 -07:00
parent 46fd03047b
commit 1cdb6a66f0
287 changed files with 1 additions and 2 deletions
@@ -0,0 +1,171 @@
+goog.provide('ol.interaction.PinchZoom');
+
+goog.require('ol');
+goog.require('ol.ViewHint');
+goog.require('ol.functions');
+goog.require('ol.interaction.Interaction');
+goog.require('ol.interaction.Pointer');
+
+
+/**
+ * @classdesc
+ * Allows the user to zoom the map by pinching with two fingers
+ * on a touch screen.
+ *
+ * @constructor
+ * @extends {ol.interaction.Pointer}
+ * @param {olx.interaction.PinchZoomOptions=} opt_options Options.
+ * @api
+ */
+ol.interaction.PinchZoom = function(opt_options) {
+
+  ol.interaction.Pointer.call(this, {
+    handleDownEvent: ol.interaction.PinchZoom.handleDownEvent_,
+    handleDragEvent: ol.interaction.PinchZoom.handleDragEvent_,
+    handleUpEvent: ol.interaction.PinchZoom.handleUpEvent_
+  });
+
+  var options = opt_options ? opt_options : {};
+
+  /**
+   * @private
+   * @type {boolean}
+   */
+  this.constrainResolution_ = options.constrainResolution || false;
+
+  /**
+   * @private
+   * @type {ol.Coordinate}
+   */
+  this.anchor_ = null;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.duration_ = options.duration !== undefined ? options.duration : 400;
+
+  /**
+   * @private
+   * @type {number|undefined}
+   */
+  this.lastDistance_ = undefined;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.lastScaleDelta_ = 1;
+
+};
+ol.inherits(ol.interaction.PinchZoom, ol.interaction.Pointer);
+
+
+/**
+ * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
+ * @this {ol.interaction.PinchZoom}
+ * @private
+ */
+ol.interaction.PinchZoom.handleDragEvent_ = function(mapBrowserEvent) {
+  var scaleDelta = 1.0;
+
+  var touch0 = this.targetPointers[0];
+  var touch1 = this.targetPointers[1];
+  var dx = touch0.clientX - touch1.clientX;
+  var dy = touch0.clientY - touch1.clientY;
+
+  // distance between touches
+  var distance = Math.sqrt(dx * dx + dy * dy);
+
+  if (this.lastDistance_ !== undefined) {
+    scaleDelta = this.lastDistance_ / distance;
+  }
+  this.lastDistance_ = distance;
+
+
+  var map = mapBrowserEvent.map;
+  var view = map.getView();
+  var resolution = view.getResolution();
+  var maxResolution = view.getMaxResolution();
+  var minResolution = view.getMinResolution();
+  var newResolution = resolution * scaleDelta;
+  if (newResolution > maxResolution) {
+    scaleDelta = maxResolution / resolution;
+    newResolution = maxResolution;
+  } else if (newResolution < minResolution) {
+    scaleDelta = minResolution / resolution;
+    newResolution = minResolution;
+  }
+
+  if (scaleDelta != 1.0) {
+    this.lastScaleDelta_ = scaleDelta;
+  }
+
+  // scale anchor point.
+  var viewportPosition = map.getViewport().getBoundingClientRect();
+  var centroid = ol.interaction.Pointer.centroid(this.targetPointers);
+  centroid[0] -= viewportPosition.left;
+  centroid[1] -= viewportPosition.top;
+  this.anchor_ = map.getCoordinateFromPixel(centroid);
+
+  // scale, bypass the resolution constraint
+  map.render();
+  ol.interaction.Interaction.zoomWithoutConstraints(view, newResolution, this.anchor_);
+};
+
+
+/**
+ * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
+ * @return {boolean} Stop drag sequence?
+ * @this {ol.interaction.PinchZoom}
+ * @private
+ */
+ol.interaction.PinchZoom.handleUpEvent_ = function(mapBrowserEvent) {
+  if (this.targetPointers.length < 2) {
+    var map = mapBrowserEvent.map;
+    var view = map.getView();
+    view.setHint(ol.ViewHint.INTERACTING, -1);
+    var resolution = view.getResolution();
+    if (this.constrainResolution_ ||
+        resolution < view.getMinResolution() ||
+        resolution > view.getMaxResolution()) {
+      // Zoom to final resolution, with an animation, and provide a
+      // direction not to zoom out/in if user was pinching in/out.
+      // Direction is > 0 if pinching out, and < 0 if pinching in.
+      var direction = this.lastScaleDelta_ - 1;
+      ol.interaction.Interaction.zoom(view, resolution,
+          this.anchor_, this.duration_, direction);
+    }
+    return false;
+  } else {
+    return true;
+  }
+};
+
+
+/**
+ * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
+ * @return {boolean} Start drag sequence?
+ * @this {ol.interaction.PinchZoom}
+ * @private
+ */
+ol.interaction.PinchZoom.handleDownEvent_ = function(mapBrowserEvent) {
+  if (this.targetPointers.length >= 2) {
+    var map = mapBrowserEvent.map;
+    this.anchor_ = null;
+    this.lastDistance_ = undefined;
+    this.lastScaleDelta_ = 1;
+    if (!this.handlingDownUpSequence) {
+      map.getView().setHint(ol.ViewHint.INTERACTING, 1);
+    }
+    return true;
+  } else {
+    return false;
+  }
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.interaction.PinchZoom.prototype.shouldStopEvent = ol.functions.FALSE;