Add donut.width and remove donut.radius.inner

c3.js

@@ -282,7 +282,7 @@
         var __donut_label_show = getConfig(['donut', 'label', 'show'], true),
             __donut_label_format = getConfig(['donut', 'label', 'format']),
             __donut_label_threshold = getConfig(['donut', 'label', 'threshold'], 0.05),
-            __donut_radius_inner = getConfig(['donut', 'radius', 'inner']),
+            __donut_width = getConfig(['donut', 'width']),
             __donut_sort = getConfig(['donut', 'sort'], true),
             __donut_expand = getConfig(['donut', 'expand'], true),
             __donut_title = getConfig(['donut', 'title'], "");
@@ -530,21 +530,11 @@
                 .attr("y2", __axis_rotated ? -10 : height);
         }
         function updateRadius() {
-            var innerRadiusRatio;
+            var innerRadiusRatio, w = __gauge_width || __donut_width;
             radiusExpanded = Math.min(arcWidth, arcHeight) / 2;
             radius = radiusExpanded * 0.95;
-            innerRadiusRatio = __gauge_width ? (radius - __gauge_width) / radius : 0.6;
-            if (hasDonutType(c3.data.targets) || hasGaugeType(c3.data.targets)) {
-                if (typeof __donut_radius_inner === 'function') {
-                    innerRadius = __donut_radius_inner(radius, innerRadiusRatio);
-                } else if (__donut_radius_inner) {
-                    innerRadius = __donut_radius_inner;
-                } else {
-                    innerRadius = radius * innerRadiusRatio;
-                }
-            } else {
-                innerRadius = 0;
-            }
+            innerRadiusRatio = w ? (radius - w) / radius : 0.6;
+            innerRadius = hasDonutType(c3.data.targets) || hasGaugeType(c3.data.targets) ? radius * innerRadiusRatio : 0;
         }
         function getSvgLeft() {
             var leftAxisClass = __axis_rotated ? CLASS.axisX : CLASS.axisY,

htdocs/samples/chart_donut.html

@@ -36,9 +36,7 @@
 //            format: function (d, ratio) { return ""; }
           },
           title: "Iris Petal Width",
-          radius: {
-            inner: 60
-          }
+          width: 70
         }
       });