144 lines
2.8 KiB
JavaScript
144 lines
2.8 KiB
JavaScript
// FIXME decide default value for snapToPixel
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goog.provide('ol.style.Circle');
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goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('ol.color');
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goog.require('ol.style.Fill');
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goog.require('ol.style.Image');
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goog.require('ol.style.ImageState');
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goog.require('ol.style.Stroke');
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/**
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* @constructor
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* @param {olx.style.CircleOptions=} opt_options Options.
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* @extends {ol.style.Image}
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*/
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ol.style.Circle = function(opt_options) {
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var options = goog.isDef(opt_options) ? opt_options : {};
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/**
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* @private
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* @type {HTMLCanvasElement}
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*/
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this.canvas_ = /** @type {HTMLCanvasElement} */
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(goog.dom.createElement(goog.dom.TagName.CANVAS));
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/**
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* @private
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* @type {ol.style.Fill}
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*/
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this.fill_ = goog.isDef(options.fill) ? options.fill : null;
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/**
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* @private
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* @type {number}
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*/
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this.radius_ = options.radius;
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/**
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* @private
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* @type {ol.style.Stroke}
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*/
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this.stroke_ = goog.isDef(options.stroke) ? options.stroke : null;
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var size = this.render_();
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goog.base(this, {
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anchor: [size / 2, size / 2],
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imageState: ol.style.ImageState.LOADED,
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rotation: 0,
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scale: 1,
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size: [size, size],
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snapToPixel: undefined,
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subtractViewRotation: false
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});
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};
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goog.inherits(ol.style.Circle, ol.style.Image);
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/**
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* @return {ol.style.Fill} Fill style.
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*/
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ol.style.Circle.prototype.getFill = function() {
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return this.fill_;
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};
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/**
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* @inheritDoc
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*/
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ol.style.Circle.prototype.getHitDetectionImage = function(pixelRatio) {
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return this.canvas_;
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};
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/**
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* @inheritDoc
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*/
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ol.style.Circle.prototype.getImage = function(pixelRatio) {
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return this.canvas_;
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};
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/**
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* @return {number} Radius.
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*/
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ol.style.Circle.prototype.getRadius = function() {
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return this.radius_;
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};
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/**
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* @return {ol.style.Stroke} Stroke style.
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*/
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ol.style.Circle.prototype.getStroke = function() {
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return this.stroke_;
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};
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/**
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* @inheritDoc
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*/
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ol.style.Circle.prototype.load = goog.nullFunction;
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/**
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* @private
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* @return {number} Size.
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*/
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ol.style.Circle.prototype.render_ = function() {
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var canvas = this.canvas_;
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var size = 2 * this.radius_ + 1;
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if (!goog.isNull(this.stroke_) && goog.isDef(this.stroke_.width)) {
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size += this.stroke_.width;
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}
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canvas.height = size;
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canvas.width = size;
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var context = /** @type {CanvasRenderingContext2D} */
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(canvas.getContext('2d'));
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context.arc(size / 2, size / 2, this.radius_, 0, 2 * Math.PI, true);
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if (!goog.isNull(this.fill_)) {
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context.fillStyle = ol.color.asString(this.fill_.getColor());
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context.fill();
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}
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if (!goog.isNull(this.stroke_)) {
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var strokeColor = this.stroke_.getColor();
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context.strokeStyle = ol.color.asString(strokeColor);
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var strokeWidth = this.stroke_.getWidth();
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context.lineWidth = goog.isDef(strokeWidth) ? strokeWidth : 1;
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context.stroke();
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}
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return size;
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};
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