2013-01-08 57 views
1

如何将自定义颜色添加到此raphael饼图。 http://raphaeljs.com/pie.html它从HTML表中获取值并将它们插入到饼图中。现在它使用以下来填充扇区。我认为它使用随机函数来选择十六进制颜色。我不确定。raphael演示饼图调整以添加自定义颜色

bcolor = Raphael.hsb(start, 1, 1), 
      p = sector(cx, cy, r, angle, angle + angleplus, {fill: "90-" + bcolor + "-" + color, stroke: stroke, "stroke-width": 2}), 

我希望能够拉入一组十六进制颜色数组。不应该有超过6个值。这是完整的代码。我也想设置自定义渐变,但现在不是必需的。

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.hsb(start, .90, 1), 
       ms = 500, 
       delta = 30, 
       bcolor = Raphael.hsb(start, 1, 1), 
       p = sector(cx, cy, r, angle, angle + angleplus, {fill: "90-" + bcolor + "-" + color, stroke: stroke, "stroke-width": 2}), 
       txt = paper.text(cx + (r + delta + 2) * Math.cos(-popangle * rad), cy + (r + delta + 5) * Math.sin(-popangle * rad), labels[j]).attr({fill: "#999999", stroke: "none", opacity: 1, "font-size": 13}); 
      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-new", 400, 400).pieChart(100, 100, 50, values, labels, "#fff"); 
}); 

回答

4
bcolor = Raphael.hsb(hue,saturation,value) 

需要开始作为色调的值。所以它从0开始,并为每个扇区增加.1。没有什么随意的。要做你需要的,只需创建你的数组。

var colors = ['red','green','blue','yellow','#ffaa00','#00ffaa','#aa00ff']; 

组从阵列的颜色(模量保持颜色阵列长度内的j的值)

bcolor = colors[j%colors.length] 

并在段

p = sector(cx, cy, r, angle, angle + angleplus, 
    {fill: "90-" + bcolor + "-" + bcolor, stroke: stroke, "stroke-width": 1}) 

原始代码中使用它我从使用过的两种颜色(颜色和bcolor)编辑了这个,而我在这里只是bcolor。如果你想要一个渐变,请用另一种颜色加回来。

这是显示结果的fiddle

+0

你是小提琴不起作用... – Jesper

+0

你是对的。试试这个 - http://jsfiddle.net/amadanNM/wqcnwcu6/ – amadan