fix: customRenderer methods are optional

Author: farfromrefug

src/charting/charts/BarChart.ts

@@ -17,8 +17,8 @@ import { BaseCustomRenderer } from '../renderer/DataRenderer';
 const LOG_TAG = 'BarChart';
 
 export interface CustomRenderer extends BaseCustomRenderer {
-    drawBar: (c: Canvas, e: BarEntry, dataSet: IBarDataSet, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
-    drawHighlight: (c: Canvas, e: Highlight, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawBar?: (c: Canvas, e: BarEntry, dataSet: IBarDataSet, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawHighlight?: (c: Canvas, e: Highlight, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
 }
 
 export class BarChart extends BarLineChartBase<Entry, BarDataSet, BarData> implements BarDataProvider {

src/charting/charts/BubbleChart.ts

@@ -9,8 +9,8 @@ import { BaseCustomRenderer } from '../renderer/DataRenderer';
 import { BarLineChartBase } from './BarLineChartBase';
 
 export interface CustomRenderer extends BaseCustomRenderer {
-    drawBubble: (c: Canvas, e: BubbleEntry, cx: number, cy: number, radius: number, paint: Paint) => void;
-    drawHighlight: (c: Canvas, e: Highlight, cx: number, cy: number, radius: number, paint: Paint) => void;
+    drawBubble?: (c: Canvas, e: BubbleEntry, cx: number, cy: number, radius: number, paint: Paint) => void;
+    drawHighlight?: (c: Canvas, e: Highlight, cx: number, cy: number, radius: number, paint: Paint) => void;
 }
 
 /**

src/charting/charts/CandleStickChart.ts

@@ -9,12 +9,12 @@ import { BaseCustomRenderer } from '../renderer/DataRenderer';
 import { BarLineChartBase } from './BarLineChartBase';
 
 export interface CustomRenderer extends BaseCustomRenderer {
-    drawShadows: (c: Canvas, e: CandleEntry, lines: number[], paint: Paint) => void;
-    drawOpened: (c: Canvas, e: CandleEntry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
-    drawClosed: (c: Canvas, e: CandleEntry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
-    drawEqual: (c: Canvas, e: CandleEntry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
-    drawLines: (c: Canvas, e: CandleEntry, range: number[], open: number[], close: number[], paint: Paint) => void;
-    drawHighlight: (c: Canvas, e: Highlight, set: ICandleDataSet, paint: Paint) => void;
+    drawShadows?: (c: Canvas, e: CandleEntry, lines: number[], paint: Paint) => void;
+    drawOpened?: (c: Canvas, e: CandleEntry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawClosed?: (c: Canvas, e: CandleEntry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawEqual?: (c: Canvas, e: CandleEntry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawLines?: (c: Canvas, e: CandleEntry, range: number[], open: number[], close: number[], paint: Paint) => void;
+    drawHighlight?: (c: Canvas, e: Highlight, set: ICandleDataSet, paint: Paint) => void;
 }
 /**
  * Financial chart type that draws candle-sticks (OHCL chart).

src/charting/charts/PieChart.ts

@@ -16,8 +16,8 @@ import { BaseCustomRenderer } from '../renderer/DataRenderer';
 const LOG_TAG = 'PieChart';
 
 export interface CustomRenderer extends BaseCustomRenderer {
-    drawSlice: (c: Canvas, e: Entry, slice: Path, paint: Paint) => void;
-    drawHighlight: (c: Canvas, e: Highlight, slice: Path, paint: Paint) => void;
+    drawSlice?: (c: Canvas, e: Entry, slice: Path, paint: Paint) => void;
+    drawHighlight?: (c: Canvas, e: Highlight, slice: Path, paint: Paint) => void;
 }
 /**
  * View that represents a pie chart. Draws cake like slices.

src/charting/charts/RadarChart.ts

@@ -15,8 +15,8 @@ import { BaseCustomRenderer } from '../renderer/DataRenderer';
 
 const LOG_TAG = 'RadarChart';
 export interface CustomRenderer extends BaseCustomRenderer {
-    drawRadar: (c: Canvas, e: Entry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
-    drawHighlight: (c: Canvas, e: Highlight, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawRadar?: (c: Canvas, e: Entry, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
+    drawHighlight?: (c: Canvas, e: Highlight, left: number, top: number, right: number, bottom: number, paint: Paint) => void;
 }
 /**
  * Implementation of the RadarChart, a "spidernet"-like chart. It works best

src/charting/charts/ScatterChart.ts

@@ -11,8 +11,8 @@ import { ViewPortHandler } from '../utils/ViewPortHandler';
 import { BaseCustomRenderer } from '../renderer/DataRenderer';
 
 export interface CustomRenderer extends BaseCustomRenderer {
-    drawShape: (c: Canvas, e: Entry, dataSet: IScatterDataSet, viewPortHandler: ViewPortHandler, x: number, y: number, paint: Paint) => void;
-    drawHighlight: (c: Canvas, e: Highlight, set: IScatterDataSet, paint: Paint) => void;
+    drawShape?: (c: Canvas, e: Entry, dataSet: IScatterDataSet, viewPortHandler: ViewPortHandler, x: number, y: number, paint: Paint) => void;
+    drawHighlight?: (c: Canvas, e: Highlight, set: IScatterDataSet, paint: Paint) => void;
 }
 
 export enum ScatterShape {

src/charting/renderer/DataRenderer.ts

@@ -8,7 +8,7 @@ import { ViewPortHandler } from '../utils/ViewPortHandler';
 import { Renderer } from './Renderer';
 
 export interface BaseCustomRenderer {
-    drawValue: (c: Canvas, valueText: string, x: number, y: number, color: Color, paint: Paint) => void;
+    drawValue?: (c: Canvas, valueText: string, x: number, y: number, color: Color, paint: Paint) => void;
 }
 
 /**