RaphaelJS是一个用JavaScript实现的强大的矢量图形库。
(1)使用前准备,下载RaphaelJS,到官网下载。
(2)在相应的HTML页面引入RaphaelJS,如下示例代码:
<!DOCTYPE html> <html> <head> <title>RaphaelJS Demo</title> </head> <body> <div id="paperDiv" style=" 140px; padding:0px; margin:0px"></div> <script src="raphael-min.js"></script> </body> </html>
(3)在通过元素创建一个对象
var elm = document.getElementById("paperDiv"); var paper = Raphael(elm, 560, 400);
或者,直接将元素的id传到Raphael中,如:
var paper = Raphael("paperDiv", 650, 400);
(4)画圆circle()
//var cir = paper.circle(x, y, r); //x和y为坐标,r为圆的半径 var cir = paper.circle(35, 25, 20);
(5)为形状设置属性attr()
/* 语法如下: element.attr({ "property1": value1, "property2": value2 }) */
如画一个有填充颜色的圆:
var coloredCircle = paper.circle(35, 25, 20).attr({ "fill": "#17A9C6", "stroke": "#2A6570", "stroke-width": 2 });
(6)画矩形rect()
//语法: //paper.rect(x, y, width, height, border-radius[optional]); //常规矩形 var rect = paper.rect(20, 20, 170, 100); //圆角矩形 var roundedRect = paper.rect(20, 20, 170, 100, 20);
(7)画椭圆形ellipse()
//语法: //paper.ellipse(x, y, rx, ry); var ellipse = paper.ellipse(195, 125, 170, 100);
(8)画路径path()
var tri = paper.path("M0,0L26,0L13,18L0.0");
常用命令及解释
(9)处理文本text()
//语法: //paper.text(x, y, "text");
(10)处理变形transform()
常用命令及解释