122 lines
3.1 KiB
JavaScript
122 lines
3.1 KiB
JavaScript
// FIXME works for View2D only
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goog.provide('ol.interaction.TouchPan');
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goog.require('goog.asserts');
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goog.require('ol.Kinetic');
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goog.require('ol.Pixel');
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goog.require('ol.PreRenderFunction');
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goog.require('ol.View');
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goog.require('ol.ViewHint');
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goog.require('ol.coordinate');
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goog.require('ol.interaction.Touch');
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/**
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* @constructor
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* @extends {ol.interaction.Touch}
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* @param {ol.Kinetic=} opt_kinetic Kinetic object.
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*/
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ol.interaction.TouchPan = function(opt_kinetic) {
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goog.base(this);
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/**
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* @private
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* @type {ol.Kinetic|undefined}
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*/
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this.kinetic_ = opt_kinetic;
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/**
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* @private
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* @type {?ol.PreRenderFunction}
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*/
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this.kineticPreRenderFn_ = null;
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/**
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* @type {ol.Pixel}
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*/
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this.lastCentroid = null;
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};
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goog.inherits(ol.interaction.TouchPan, ol.interaction.Touch);
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/**
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* @inheritDoc
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*/
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ol.interaction.TouchPan.prototype.handleTouchMove = function(mapBrowserEvent) {
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goog.asserts.assert(this.targetTouches.length >= 1);
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var centroid = ol.interaction.Touch.centroid(this.targetTouches);
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if (!goog.isNull(this.lastCentroid)) {
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if (this.kinetic_) {
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this.kinetic_.update(centroid.x, centroid.y);
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}
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var deltaX = this.lastCentroid.x - centroid.x;
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var deltaY = centroid.y - this.lastCentroid.y;
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var view = mapBrowserEvent.map.getView();
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var center = [deltaX, deltaY];
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ol.coordinate.scale(center, view.getResolution());
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ol.coordinate.rotate(center, view.getRotation());
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ol.coordinate.add(center, view.getCenter());
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view.setCenter(center);
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}
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this.lastCentroid = centroid;
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.TouchPan.prototype.handleTouchEnd =
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function(mapBrowserEvent) {
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var map = mapBrowserEvent.map;
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var view = map.getView();
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if (this.targetTouches.length == 0) {
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view.setHint(ol.ViewHint.INTERACTING, -1);
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if (this.kinetic_ && this.kinetic_.end()) {
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var distance = this.kinetic_.getDistance();
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var angle = this.kinetic_.getAngle();
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var center = view.getCenter();
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this.kineticPreRenderFn_ = this.kinetic_.pan(center);
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map.addPreRenderFunction(this.kineticPreRenderFn_);
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var centerpx = map.getPixelFromCoordinate(center);
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var destpx = new ol.Pixel(
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centerpx.x - distance * Math.cos(angle),
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centerpx.y - distance * Math.sin(angle));
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var dest = map.getCoordinateFromPixel(destpx);
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view.setCenter(dest);
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}
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return false;
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} else {
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this.lastCentroid = null;
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return true;
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}
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.TouchPan.prototype.handleTouchStart =
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function(mapBrowserEvent) {
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if (this.targetTouches.length >= 1) {
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var map = mapBrowserEvent.map;
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var view = map.getView();
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this.lastCentroid = null;
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if (!goog.isNull(this.kineticPreRenderFn_) &&
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map.removePreRenderFunction(this.kineticPreRenderFn_)) {
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map.requestRenderFrame();
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view.setCenter(mapBrowserEvent.frameState.view2DState.center);
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this.kineticPreRenderFn_ = null;
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}
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if (this.kinetic_) {
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this.kinetic_.begin();
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}
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view.setHint(ol.ViewHint.INTERACTING, 1);
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return true;
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} else {
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return false;
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}
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};
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