164 lines
3.9 KiB
JavaScript
164 lines
3.9 KiB
JavaScript
goog.provide('ol.control.Rotate');
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goog.require('goog.dom');
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goog.require('goog.dom.classlist');
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goog.require('goog.events');
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goog.require('goog.events.EventType');
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goog.require('ol');
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goog.require('ol.animation');
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goog.require('ol.control.Control');
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goog.require('ol.css');
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goog.require('ol.easing');
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/**
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* @classdesc
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* A button control to reset rotation to 0.
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* To style this control use css selector `.ol-rotate`. A `.ol-hidden` css
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* selector is added to the button when the rotation is 0.
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*
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* @constructor
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* @extends {ol.control.Control}
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* @param {olx.control.RotateOptions=} opt_options Rotate options.
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* @api stable
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*/
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ol.control.Rotate = function(opt_options) {
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var options = opt_options ? opt_options : {};
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var className = options.className ?
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options.className : 'ol-rotate';
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var label = options.label ? options.label : '\u21E7';
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/**
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* @type {Element}
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* @private
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*/
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this.label_ = null;
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if (goog.isString(label)) {
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this.label_ = goog.dom.createDom('SPAN',
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'ol-compass', label);
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} else {
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this.label_ = label;
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goog.dom.classlist.add(this.label_, 'ol-compass');
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}
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var tipLabel = options.tipLabel ? options.tipLabel : 'Reset rotation';
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var button = goog.dom.createDom('BUTTON', {
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'class': className + '-reset',
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'type' : 'button',
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'title': tipLabel
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}, this.label_);
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goog.events.listen(button, goog.events.EventType.CLICK,
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ol.control.Rotate.prototype.handleClick_, false, this);
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var cssClasses = className + ' ' + ol.css.CLASS_UNSELECTABLE + ' ' +
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ol.css.CLASS_CONTROL;
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var element = goog.dom.createDom('DIV', cssClasses, button);
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var render = options.render ? options.render : ol.control.Rotate.render;
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goog.base(this, {
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element: element,
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render: render,
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target: options.target
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});
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/**
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* @type {number}
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* @private
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*/
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this.duration_ = options.duration ? options.duration : 250;
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/**
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* @type {boolean}
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* @private
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*/
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this.autoHide_ = options.autoHide !== undefined ? options.autoHide : true;
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/**
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* @private
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* @type {number|undefined}
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*/
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this.rotation_ = undefined;
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if (this.autoHide_) {
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goog.dom.classlist.add(this.element, ol.css.CLASS_HIDDEN);
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}
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};
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goog.inherits(ol.control.Rotate, ol.control.Control);
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/**
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* @param {goog.events.BrowserEvent} event The event to handle
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* @private
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*/
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ol.control.Rotate.prototype.handleClick_ = function(event) {
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event.preventDefault();
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this.resetNorth_();
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};
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/**
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* @private
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*/
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ol.control.Rotate.prototype.resetNorth_ = function() {
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var map = this.getMap();
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var view = map.getView();
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if (!view) {
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// the map does not have a view, so we can't act
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// upon it
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return;
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}
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var currentRotation = view.getRotation();
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if (currentRotation !== undefined) {
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if (this.duration_ > 0) {
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currentRotation = currentRotation % (2 * Math.PI);
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if (currentRotation < -Math.PI) {
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currentRotation += 2 * Math.PI;
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}
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if (currentRotation > Math.PI) {
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currentRotation -= 2 * Math.PI;
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}
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map.beforeRender(ol.animation.rotate({
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rotation: currentRotation,
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duration: this.duration_,
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easing: ol.easing.easeOut
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}));
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}
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view.setRotation(0);
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}
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};
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/**
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* Update the rotate control element.
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* @param {ol.MapEvent} mapEvent Map event.
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* @this {ol.control.Rotate}
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* @api
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*/
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ol.control.Rotate.render = function(mapEvent) {
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var frameState = mapEvent.frameState;
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if (!frameState) {
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return;
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}
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var rotation = frameState.viewState.rotation;
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if (rotation != this.rotation_) {
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var transform = 'rotate(' + rotation + 'rad)';
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if (this.autoHide_) {
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goog.dom.classlist.enable(
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this.element, ol.css.CLASS_HIDDEN, rotation === 0);
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}
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this.label_.style.msTransform = transform;
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this.label_.style.webkitTransform = transform;
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this.label_.style.transform = transform;
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}
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this.rotation_ = rotation;
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};
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