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/**
* 圆形
* @module zrender/shape/Circle
* @author Kener (@Kener-林峰, kener.linfeng@gmail.com)
* @example
* var Circle = require('zrender/shape/Circle');
* var shape = new Circle({
* style: {
* x: 100,
* y: 100,
* r: 40,
* brushType: 'both',
* color: 'blue',
* strokeColor: 'red',
* lineWidth: 3,
* text: 'Circle'
* }
* });
* zr.addShape(shape);
*/
/**
* @typedef {Object} ICircleStyle
* @property {number} x 圆心x坐标
* @property {number} y 圆心y坐标
* @property {number} r 半径
* @property {string} [brushType='fill']
* @property {string} [color='#000000'] 填充颜色
* @property {string} [strokeColor='#000000'] 描边颜色
* @property {string} [lineCape='butt'] 线帽样式，可以是 butt, round, square
* @property {number} [lineWidth=1] 描边宽度
* @property {number} [opacity=1] 绘制透明度
* @property {number} [shadowBlur=0] 阴影模糊度，大于0有效
* @property {string} [shadowColor='#000000'] 阴影颜色
* @property {number} [shadowOffsetX=0] 阴影横向偏移
* @property {number} [shadowOffsetY=0] 阴影纵向偏移
* @property {string} [text] 图形中的附加文本
* @property {string} [textColor='#000000'] 文本颜色
* @property {string} [textFont] 附加文本样式，eg:'bold 18px verdana'
* @property {string} [textPosition='end'] 附加文本位置, 可以是 inside, left, right, top, bottom
* @property {string} [textAlign] 默认根据textPosition自动设置，附加文本水平对齐。
* 可以是start, end, left, right, center
* @property {string} [textBaseline] 默认根据textPosition自动设置，附加文本垂直对齐。
* 可以是top, bottom, middle, alphabetic, hanging, ideographic
*/
define(
function (require) {
'use strict';
var Base = require('./Base');
/**
* @alias module:zrender/shape/Circle
* @constructor
* @extends module:zrender/shape/Base
* @param {Object} options
*/
var Circle = function(options) {
Base.call(this, options);
/**
* 圆形绘制样式
* @name module:zrender/shape/Circle#style
* @type {module:zrender/shape/Circle~ICircleStyle}
*/
/**
* 圆形高亮绘制样式
* @name module:zrender/shape/Circle#highlightStyle
* @type {module:zrender/shape/Circle~ICircleStyle}
*/
};
Circle.prototype = {
type: 'circle',
/**
* 创建圆形路径
* @param {CanvasRenderingContext2D} ctx
* @param {module:zrender/shape/Circle~ICircleStyle} style
*/
buildPath : function (ctx, style) {
ctx.arc(style.x, style.y, style.r, 0, Math.PI * 2, true);
return;
},
/**
* 计算返回圆形的包围盒矩形
* @param {module:zrender/shape/Circle~ICircleStyle} style
* @return {module:zrender/shape/Base~IBoundingRect}
*/
getRect : function (style) {
if (style.__rect) {
return style.__rect;
}
var lineWidth;
if (style.brushType == 'stroke' || style.brushType == 'fill') {
lineWidth = style.lineWidth || 1;
}
else {
lineWidth = 0;
}
style.__rect = {
x : Math.round(style.x - style.r - lineWidth / 2),
y : Math.round(style.y - style.r - lineWidth / 2),
width : style.r * 2 + lineWidth,
height : style.r * 2 + lineWidth
};
return style.__rect;
}
};
require('../tool/util').inherits(Circle, Base);
return Circle;
}
);