PlotKit.SVGRenderer.prototype._renderPieChart = function()

in web/servicemix-web-console/src/main/webapp/js/plotkit/SVG.js [232:302]
57 lines of code
17 McCabe index (conditional complexity)

PlotKit.SVGRenderer.prototype._renderPieChart = function() {
    var colorCount = this.options.colorScheme.length;
    var slices = this.layout.slices;

    var centerx = this.area.x + this.area.w * 0.5;
    var centery = this.area.y + this.area.h * 0.5;
    var radius = Math.min(this.area.w * this.options.pieRadius, 
                          this.area.h * this.options.pieRadius);

    // NOTE NOTE!! Canvas Tag draws the circle clockwise from the y = 0, x = 1
    // so we have to subtract 90 degrees to make it start at y = 1, x = 0

	// workaround if we only have 1 slice of 100%
	if (slices.length == 1 && (Math.abs(slices[0].startAngle) - Math.abs(slices[0].endAngle) < 0.1)) {
        var attrs = {"cx": centerx , "cy": centery , "r": radius };
        var color = this.options.colorScheme[0];
        if (this.options.shouldFill)
            attrs["fill"] = color.toRGBString();
        else
            attrs["fill"] = "none";

        if (this.options.shouldStroke && 
            (this.options.strokeColor || this.options.strokeColorTransform)) {
            if (this.options.strokeColor)
                attrs["stroke"] = this.options.strokeColor.toRGBString();
            else if (this.options.strokeColorTransform)
                attrs["stroke"] = color[this.options.strokeColorTransform]().toRGBString();
            attrs["style"] = "stroke-width: " + this.options.strokeWidth;
        }

        this.root.appendChild(this.createSVGElement("circle", attrs));
        return;
	}

    for (var i = 0; i < slices.length; i++) {
        var attrs = new Array();
        var color = this.options.colorScheme[i%colorCount];
        if (this.options.shouldFill)
            attrs["fill"] = color.toRGBString();
        else
            attrs["fill"] = "none";

        if (this.options.shouldStroke &&
            (this.options.strokeColor || this.options.strokeColorTransform)) {
            if (this.options.strokeColor)
                attrs["stroke"] = this.options.strokeColor.toRGBString();
            else if (this.options.strokeColorTransform)
                attrs["stroke"] = color[this.options.strokeColorTransform]().toRGBString();
            attrs["style"] = "stroke-width:" + this.options.strokeWidth;
        }

        var largearc = 0;
        if (Math.abs(slices[i].endAngle - slices[i].startAngle) > Math.PI)
            largearc = 1;
        var x1 = Math.cos(slices[i].startAngle - Math.PI/2) * radius;
        var y1 = Math.sin(slices[i].startAngle - Math.PI/2) * radius;
        var x2 = Math.cos(slices[i].endAngle - Math.PI/2) * radius;
        var y2 = Math.sin(slices[i].endAngle - Math.PI/2) * radius;
        var rx = x2 - x1;
        var ry = y2 - y1;

        var pathString = "M" + centerx + "," + centery + " ";       
        pathString += "l" + x1 + "," + y1 + " ";
        pathString += "a" + radius + "," + radius + " 0 " + largearc + ",1 " + rx + "," + ry + " z";

        attrs["d"] = pathString;

        var elem = this.createSVGElement("path", attrs);
        this.root.appendChild(elem);
    }
};