Raphael.fn.pieChart = function (cx, cy, r, values, labels, stroke) {
var paper = this,
rad = Math.PI / 180,
chart = this.set();
function sector(cx, cy, r, startAngle, endAngle, params) {
var x1 = cx + r * Math.cos(-startAngle * rad),
x2 = cx + r * Math.cos(-endAngle * rad),
y1 = cy + r * Math.sin(-startAngle * rad),
y2 = cy + r * Math.sin(-endAngle * rad);
return paper.path(["M", cx, cy, "L", x1, y1, "A", r, r, 0, +(endAngle - startAngle > 180), 0, x2, y2, "z"]).attr(params);
}
var angle = 0,
total = 0,
start = 0,
process = function (j) {
var value = values[j],
angleplus = 360 * value / total,
popangle = angle + (angleplus / 2),
color = Raphael.hsb2rgb(start, 1, 1),
ms = 500,
delta = 30,
bcolor = Raphael.hsb2rgb(start, 1, 1),
//主要为这一段代码怎么设置颜色"90-" + bcolor + "-" + color看不太懂
p = sector(cx, cy, r, angle, angle + angleplus, {fill: "90-" + bcolor + "-" + color, stroke: stroke, "stroke-width": 2}),
txt = paper.text(140, 30, labels[j]).attr({fill: "black", stroke: "none", opacity: 0, "font-size": 13,"font-family":"微软雅黑"});
alert(start);
alert(color);
//alert(bcolor);
p.mouseover(function () {
p.stop().animate({transform: "s1.1 1.1 " + cx + " " + cy}, ms, "elastic");
txt.stop().animate({opacity: 1}, ms, "elastic");
}).mouseout(function () {
p.stop().animate({transform: ""}, ms, "elastic");
txt.stop().animate({opacity: 0}, ms);
});
angle += angleplus;
chart.push(p);
chart.push(txt);
start += .1;
};
for (var i = 0, ii = values.length; i < ii; i++) {
total += values[i];
}
for (i = 0; i < ii; i++) {
process(i);
}
return chart;
};
$(function(){
var values = [],
labels = [];
$("tr").each(function () {
values.push(parseInt($("td", this).text(), 10));
labels.push($("th", this).text());
});
$("table").hide();
Raphael("holder", 280, 220).pieChart(140, 120, 70, values, labels, "#fff");
})
