added polygon element

lib/basic-elements/index.ts

@@ -1,6 +1,7 @@
 export { FixedRadiusCircle } from './fixedRadiusCircle';
 export { Group } from './group';
 export { Line } from './line';
+export { Polygon } from './polygon';
 export { Polyline } from './polyline';
 export { QuadraticCurve } from './quadraticCurve';
 export { ScalableText } from './scalableText';

lib/basic-elements/polygon.ts

@@ -0,0 +1,15 @@
+import { StyledGraphicNode } from '../styledGraphicNode';
+
+/**
+ * Class for a polygon element.
+ */
+export class Polygon extends StyledGraphicNode {
+  /**
+   * Constructor.
+   */
+  public constructor() {
+    super();
+
+    this.baseClass = 'polygon';
+  }
+}

lib/index.ts

@@ -13,6 +13,7 @@ export { Viewport } from './application/viewport';
 export { FixedRadiusCircle } from './basic-elements/fixedRadiusCircle';
 export { Group } from './basic-elements/group';
 export { Line } from './basic-elements/line';
+export { Polygon } from './basic-elements/polygon';
 export { Polyline } from './basic-elements/polyline';
 export { QuadraticCurve } from './basic-elements/quadraticCurve';
 export { ScalableText } from './basic-elements/scalableText';

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@daign/2d-graphics",
-  "version": "1.1.7",
+  "version": "1.1.8",
   "description": "Two dimensional graphics library that implements the daign-2d-pipeline.",
   "keywords": [
     "graphics",

test/basic-elements/polygon.spec.ts

@@ -0,0 +1,16 @@
+import { expect } from 'chai';
+
+import { Polygon } from '../../lib';
+
+describe( 'Polygon', (): void => {
+  describe( 'constructor', (): void => {
+    it( 'should set the base class polygon', (): void => {
+      // Act
+      const polygon = new Polygon();
+
+      // Assert
+      expect( ( polygon as any ).classNames.getByName( 'baseClass' ).value )
+        .to.equal( 'polygon' );
+    } );
+  } );
+} );