309 lines
7.9 KiB
JavaScript
309 lines
7.9 KiB
JavaScript
goog.provide('ol.MapBrowserEvent');
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goog.provide('ol.MapBrowserEvent.EventType');
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goog.provide('ol.MapBrowserEventHandler');
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goog.require('goog.asserts');
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goog.require('goog.events.BrowserEvent');
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goog.require('goog.events.EventTarget');
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goog.require('goog.events.EventType');
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goog.require('goog.style');
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goog.require('ol.BrowserFeature');
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goog.require('ol.Coordinate');
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goog.require('ol.MapEvent');
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goog.require('ol.Pixel');
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/**
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* @constructor
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* @extends {ol.MapEvent}
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* @param {string} type Event type.
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* @param {ol.Map} map Map.
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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*/
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ol.MapBrowserEvent = function(type, map, browserEvent) {
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goog.base(this, type, map);
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/**
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* @type {goog.events.BrowserEvent}
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*/
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this.browserEvent = browserEvent;
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/**
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* @private
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* @type {ol.Coordinate}
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*/
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this.coordinate_ = null;
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/**
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* @private
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* @type {ol.Pixel}
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*/
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this.pixel_ = null;
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};
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goog.inherits(ol.MapBrowserEvent, ol.MapEvent);
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/**
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* @return {ol.Coordinate} Coordinate.
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*/
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ol.MapBrowserEvent.prototype.getCoordinate = function() {
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if (goog.isNull(this.coordinate_)) {
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this.coordinate_ = this.map.getCoordinateFromPixel(this.getPixel());
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}
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return this.coordinate_;
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};
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/**
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* Get pixel offset of the event from the top-left corner of the map viewport.
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* @return {ol.Pixel} Pixel offset.
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*/
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ol.MapBrowserEvent.prototype.getPixel = function() {
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if (goog.isNull(this.pixel_)) {
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var eventPosition = goog.style.getRelativePosition(
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this.browserEvent, this.map.getViewport());
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this.pixel_ = new ol.Pixel(eventPosition.x, eventPosition.y);
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}
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return this.pixel_;
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};
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/**
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* @return {boolean} Do we have a left click?
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*/
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ol.MapBrowserEvent.prototype.isMouseActionButton = function() {
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// always assume a left-click on touch devices
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return ol.BrowserFeature.HAS_TOUCH ||
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this.browserEvent.isMouseActionButton();
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};
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/**
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* @param {ol.Map} map The map with the viewport to listen to events on.
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* @constructor
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* @extends {goog.events.EventTarget}
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*/
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ol.MapBrowserEventHandler = function(map) {
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/**
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* This is the element that we will listen to the real events on.
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* @type {ol.Map}
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* @private
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*/
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this.map_ = map;
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/**
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* @type {Object}
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* @private
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*/
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this.previous_ = null;
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/**
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* @type {boolean}
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* @private
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*/
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this.dragged_ = false;
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/**
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* Timestamp for the first click of a double click. Will be set back to 0
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* as soon as a double click is detected.
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* @type {number}
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* @private
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*/
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this.timestamp_ = 0;
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/**
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* @type {Array.<number>}
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* @private
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*/
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this.dragListenerKeys_ = null;
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/**
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* @type {goog.events.BrowserEvent}
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* @private
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*/
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this.down_ = null;
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var element = this.map_.getViewport();
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if (!ol.BrowserFeature.HAS_TOUCH) {
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goog.events.listen(element,
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[goog.events.EventType.CLICK, goog.events.EventType.DBLCLICK],
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this.click_, false, this);
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}
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goog.events.listen(element,
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ol.BrowserFeature.HAS_TOUCH ?
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goog.events.EventType.TOUCHSTART :
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goog.events.EventType.MOUSEDOWN,
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this.handleDown_, false, this);
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};
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goog.inherits(ol.MapBrowserEventHandler, goog.events.EventTarget);
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @private
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*/
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ol.MapBrowserEventHandler.prototype.touchEnableBrowserEvent_ =
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function(browserEvent) {
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if (ol.BrowserFeature.HAS_TOUCH) {
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goog.asserts.assert(browserEvent instanceof goog.events.BrowserEvent);
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var nativeEvent = browserEvent.getBrowserEvent();
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if (nativeEvent.touches && nativeEvent.touches.length) {
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var nativeTouch = nativeEvent.touches[0];
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browserEvent.clientX = nativeTouch.clientX;
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browserEvent.clientY = nativeTouch.clientY;
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}
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}
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};
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @private
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*/
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ol.MapBrowserEventHandler.prototype.click_ = function(browserEvent) {
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if (!this.dragged_) {
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var newEvent;
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if (browserEvent.type !== goog.events.EventType.DBLCLICK) {
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newEvent = new ol.MapBrowserEvent(
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ol.MapBrowserEvent.EventType.CLICK, this.map_, browserEvent);
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this.dispatchEvent(newEvent);
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}
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if (!this.timestamp_) {
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newEvent = new ol.MapBrowserEvent(
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ol.MapBrowserEvent.EventType.DBLCLICK, this.map_, browserEvent);
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this.dispatchEvent(newEvent);
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}
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}
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};
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @private
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*/
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ol.MapBrowserEventHandler.prototype.handleUp_ = function(browserEvent) {
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if (this.previous_) {
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if (!this.dragged_) {
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var now = new Date().getTime();
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if (!this.timestamp_ || now - this.timestamp_ > 250) {
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this.timestamp_ = now;
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} else {
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this.timestamp_ = 0;
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}
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if (ol.BrowserFeature.HAS_TOUCH) {
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this.click_(this.down_);
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}
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}
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this.down_ = null;
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goog.array.forEach(this.dragListenerKeys_, goog.events.unlistenByKey);
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this.dragListenerKeys_ = null;
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this.previous_ = null;
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if (this.dragged_) {
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var newEvent = new ol.MapBrowserEvent(
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ol.MapBrowserEvent.EventType.DRAGEND, this.map_, browserEvent);
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this.dispatchEvent(newEvent);
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}
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}
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};
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @private
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*/
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ol.MapBrowserEventHandler.prototype.handleDown_ = function(browserEvent) {
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if (!this.previous_) {
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this.touchEnableBrowserEvent_(browserEvent);
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this.down_ = browserEvent;
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this.previous_ = {
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clientX: browserEvent.clientX,
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clientY: browserEvent.clientY
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};
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this.dragged_ = false;
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this.dragListenerKeys_ = [
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goog.events.listen(document,
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ol.BrowserFeature.HAS_TOUCH ?
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goog.events.EventType.TOUCHMOVE :
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goog.events.EventType.MOUSEMOVE,
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this.drag_, false, this),
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goog.events.listen(document,
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ol.BrowserFeature.HAS_TOUCH ?
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goog.events.EventType.TOUCHEND :
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goog.events.EventType.MOUSEUP,
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this.handleUp_, false, this)
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];
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if (browserEvent.type === goog.events.EventType.MOUSEDOWN) {
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// prevent browser image dragging on pointer devices
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browserEvent.preventDefault();
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}
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}
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};
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @private
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*/
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ol.MapBrowserEventHandler.prototype.drag_ = function(browserEvent) {
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var newEvent;
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if (!this.dragged_) {
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this.dragged_ = true;
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newEvent = new ol.MapBrowserEvent(
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ol.MapBrowserEvent.EventType.DRAGSTART, this.map_, this.down_);
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this.dispatchEvent(newEvent);
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}
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this.touchEnableBrowserEvent_(browserEvent);
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this.previous_ = {
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clientX: browserEvent.clientX,
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clientY: browserEvent.clientY
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};
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// prevent viewport dragging on touch devices
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browserEvent.preventDefault();
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newEvent = new ol.MapBrowserEvent(
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ol.MapBrowserEvent.EventType.DRAG, this.map_, browserEvent);
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this.dispatchEvent(newEvent);
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};
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/**
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* FIXME empty description for jsdoc
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*/
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ol.MapBrowserEventHandler.prototype.disposeInternal = function() {
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var element = this.map_.getViewport();
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goog.events.unlisten(element,
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ol.BrowserFeature.HAS_TOUCH ?
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goog.events.EventType.TOUCHSTART :
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goog.events.EventType.MOUSEDOWN,
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this.handleDown_, false, this);
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goog.events.unlisten(element,
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ol.BrowserFeature.HAS_TOUCH ?
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goog.events.EventType.TOUCHEND :
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goog.events.EventType.MOUSEUP,
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this.handleUp_, false, this);
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goog.events.unlisten(element,
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goog.events.EventType.CLICK, this.click_, false, this);
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if (!goog.isNull(this.dragListenerKeys_)) {
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goog.array.forEach(this.dragListenerKeys_, goog.events.unlistenByKey);
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this.dragListenerKeys_ = null;
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}
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goog.base(this, 'disposeInternal');
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};
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/**
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* Constants for event names.
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* @enum {string}
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*/
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ol.MapBrowserEvent.EventType = {
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CLICK: goog.events.EventType.CLICK,
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DBLCLICK: goog.events.EventType.DBLCLICK,
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DRAGSTART: 'dragstart',
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DRAG: 'drag',
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DRAGEND: 'dragend'
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};
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