前端初始化

node_modules/zrender/src/graphic/shape/Ring.ts

@@ -0,0 +1,41 @@
+/**
+ * 圆环
+ */
+
+import Path, { PathProps } from '../Path';
+
+export class RingShape {
+    cx = 0
+    cy = 0
+    r = 0
+    r0 = 0
+}
+
+export interface RingProps extends PathProps {
+    shape?: Partial<RingShape>
+}
+class Ring extends Path<RingProps> {
+
+    shape: RingShape
+
+    constructor(opts?: RingProps) {
+        super(opts);
+    }
+
+    getDefaultShape() {
+        return new RingShape();
+    }
+
+    buildPath(ctx: CanvasRenderingContext2D, shape: RingShape) {
+        const x = shape.cx;
+        const y = shape.cy;
+        const PI2 = Math.PI * 2;
+        ctx.moveTo(x + shape.r, y);
+        ctx.arc(x, y, shape.r, 0, PI2, false);
+        ctx.moveTo(x + shape.r0, y);
+        ctx.arc(x, y, shape.r0, 0, PI2, true);
+    }
+}
+
+Ring.prototype.type = 'ring';
+export default Ring;