minor refactoring

src/index.ts

@@ -75,9 +75,9 @@ export class ChartwerkBarPod extends ChartwerkPod<BarSerie, BarOptions> {
         .attr('width', this.barWidth)
         .attr('height', (val: number) => this.getBarHeight(val))
         .on('contextmenu', this.contextMenu.bind(this))
-        .on('mouseover', () => { this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event)); })
+        .on('mouseover', this.redirectEventToOverlay.bind(this))
-        .on('mousemove', () => { this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event)); })
+        .on('mousemove', this.redirectEventToOverlay.bind(this))
-        .on('mouseout', () => { this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event)); })
+        .on('mouseout', this.redirectEventToOverlay.bind(this))
         .on('mousedown', () => { d3.event.stopPropagation(); });
 
         // render bar annotations, its all hardcoded
@@ -105,13 +105,17 @@ export class ChartwerkBarPod extends ChartwerkPod<BarSerie, BarOptions> {
             return this.getTrianglePath(x, y, this.barWidth, options);
           })
           .attr('fill', annotation.color)
-          .on('mouseover', () => { this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event)); })
+          .on('mouseover', this.redirectEventToOverlay.bind(this))
-          .on('mousemove', () => { this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event)); })
+          .on('mousemove', this.redirectEventToOverlay.bind(this))
-          .on('mouseout', () => { this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event)); })
+          .on('mouseout', this.redirectEventToOverlay.bind(this))
           .on('mousedown', () => { d3.event.stopPropagation(); });
       });
   }
 
+  redirectEventToOverlay(): void {
+    this.overlay.node().dispatchEvent(new MouseEvent(d3.event.type, d3.event));
+  }
+
   getTrianglePath(x: number, y: number, length: number, options?: { max: number, min: number }): string {
     // (x, y) - top left corner of bar
     const minTriangleSize = options?.min || 6;