planning

node_modules/ol/interaction/PinchZoom.js

@@ -0,0 +1,137 @@
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+/**
+ * @module ol/interaction/PinchZoom
+ */
+import PointerInteraction, { centroid as centroidFromPointers, } from './Pointer.js';
+import { FALSE } from '../functions.js';
+/**
+ * @typedef {Object} Options
+ * @property {number} [duration=400] Animation duration in milliseconds.
+ */
+/**
+ * @classdesc
+ * Allows the user to zoom the map by pinching with two fingers
+ * on a touch screen.
+ * @api
+ */
+var PinchZoom = /** @class */ (function (_super) {
+    __extends(PinchZoom, _super);
+    /**
+     * @param {Options} [opt_options] Options.
+     */
+    function PinchZoom(opt_options) {
+        var _this = this;
+        var options = opt_options ? opt_options : {};
+        var pointerOptions = /** @type {import("./Pointer.js").Options} */ (options);
+        if (!pointerOptions.stopDown) {
+            pointerOptions.stopDown = FALSE;
+        }
+        _this = _super.call(this, pointerOptions) || this;
+        /**
+         * @private
+         * @type {import("../coordinate.js").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;
+        return _this;
+    }
+    /**
+     * Handle pointer drag events.
+     * @param {import("../MapBrowserEvent.js").default} mapBrowserEvent Event.
+     */
+    PinchZoom.prototype.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();
+        if (scaleDelta != 1.0) {
+            this.lastScaleDelta_ = scaleDelta;
+        }
+        // scale anchor point.
+        var viewportPosition = map.getViewport().getBoundingClientRect();
+        var centroid = centroidFromPointers(this.targetPointers);
+        centroid[0] -= viewportPosition.left;
+        centroid[1] -= viewportPosition.top;
+        this.anchor_ = map.getCoordinateFromPixelInternal(centroid);
+        // scale, bypass the resolution constraint
+        map.render();
+        view.adjustResolutionInternal(scaleDelta, this.anchor_);
+    };
+    /**
+     * Handle pointer up events.
+     * @param {import("../MapBrowserEvent.js").default} mapBrowserEvent Event.
+     * @return {boolean} If the event was consumed.
+     */
+    PinchZoom.prototype.handleUpEvent = function (mapBrowserEvent) {
+        if (this.targetPointers.length < 2) {
+            var map = mapBrowserEvent.map;
+            var view = map.getView();
+            var direction = this.lastScaleDelta_ > 1 ? 1 : -1;
+            view.endInteraction(this.duration_, direction);
+            return false;
+        }
+        else {
+            return true;
+        }
+    };
+    /**
+     * Handle pointer down events.
+     * @param {import("../MapBrowserEvent.js").default} mapBrowserEvent Event.
+     * @return {boolean} If the event was consumed.
+     */
+    PinchZoom.prototype.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().beginInteraction();
+            }
+            return true;
+        }
+        else {
+            return false;
+        }
+    };
+    return PinchZoom;
+}(PointerInteraction));
+export default PinchZoom;
+//# sourceMappingURL=PinchZoom.js.map