fix color formatter

examples/demo.html

@@ -13,10 +13,10 @@
       var pod = new ChartwerkBarPod(
         document.getElementById('chart'),
         [
-          { target: 'test11', datapoints: getData(), matchedKey: 'm-1', color: 'red'  },
-          { target: 'test12', datapoints: [[100, 10], [200, 20], [300, 10]], matchedKey: 'm-1', color: 'green' },
-          { target: 'test21', datapoints: [[130, 10], [230, 26], [330, 15]], matchedKey: 'm-2', color: 'yellow'},
-          { target: 'test22', datapoints: [[130, 10], [230, 27], [330, 10]], matchedKey: 'm-2', color: 'blue' },
+          { target: 'test11', datapoints: getData(), matchedKey: 'm-1', color: 'red', colorFormatter: (data) => ['green', 'yellow'][data.rowIndex]  },
+          // { target: 'test12', datapoints: [[100, 10], [200, 20], [300, 10]], matchedKey: 'm-1', color: 'green' },
+          // { target: 'test21', datapoints: [[130, 10], [230, 26], [330, 15]], matchedKey: 'm-2', color: 'yellow'},
+          // { target: 'test22', datapoints: [[130, 10], [230, 27], [330, 10]], matchedKey: 'm-2', color: 'blue' },
         ],
         {
           usePanning: false,
@@ -24,8 +24,8 @@
             x: { format: 'custom', invert: false, valueFormatter: (value) => { return 'L' + value; } },
             y: { format: 'custom', invert: false, range: [0, 30], valueFormatter: (value) => { return value + '%'; } }
           },
-          stacked: true,
-          matching: true,
+          stacked: false,
+          matching: false,
           maxBarWidth: 20,
           minBarWidth: 4,
           zoomEvents: {
@@ -37,7 +37,8 @@
           ],
           eventsCallbacks: {
             zoomIn: (range) => { console.log('range', range) }
-          }
+          },
+          renderLegend: false,
         }
       );
       console.time('render');
@@ -46,7 +47,7 @@
 
       function getData() {
         return [
-          [100, 15], [110, 20], [300, 10],
+          [100, 15], [200, 20], [300, 10],
         ];
       }
     </script>

src/index.ts

@@ -59,12 +59,12 @@ export class ChartwerkBarPod extends ChartwerkPod<BarSerie, BarOptions> {
       .data(data)
       .enter().append('g')
       .attr('class', 'rects-container')
-      .each((d: RowValues, i: number, nodes: any) => {
-        const container = d3.select(nodes[i]);
+      .each((d: RowValues, rowIndex: number, nodes: any) => {
+        const container = d3.select(nodes[rowIndex]);
         container.selectAll('rect')
           .data(d.values)
           .enter().append('rect')
-          .style('fill', (val, i) => d.colors[i])
+          .style('fill', (val, idx) => this.getBarColor(d, val, idx, rowIndex))
           .attr('opacity', () => this.getBarOpacity(d))
           .attr('x', (val: number, idx: number) => {
             return this.getBarPositionX(d.key, idx);
@@ -150,6 +150,13 @@ export class ChartwerkBarPod extends ChartwerkPod<BarSerie, BarOptions> {
     return this.options.barOptions.opacityFormatter(rowValues);
   }
 
+  getBarColor(rowValues: RowValues, val: number, i: number, rowIndex: number): string {
+    if(_.isFunction(rowValues.colors[i])) {
+      return (rowValues.colors[i] as Function)({ rowData: rowValues, val, stackedIndex: i, rowIndex });
+    }
+    return (rowValues.colors[i] as string);
+  }
+
   mergeMacthedSeriesAndSort(matchedSeries: any[]) {
     // TODO: refactor
     if(matchedSeries.length === 0) {
@@ -197,7 +204,7 @@ export class ChartwerkBarPod extends ChartwerkPod<BarSerie, BarOptions> {
     const additionalValuesColumns = _.map(series, serie => _.map(serie.datapoints, row => row[2] !== undefined ? row[2] : null));
     const zippedAdditionalValuesColumn = _.zip(...additionalValuesColumns);
     const zippedValuesColumn = _.zip(...valuesColumns);
-    const colors = _.map(series, serie => serie.color);
+    const colors = _.map(series, serie => serie.colorFormatter || serie.color);
     const tagrets = _.map(series, serie => serie.target);
     const zippedData = _.zip(keysColumn, zippedValuesColumn, zippedAdditionalValuesColumn, tagrets);
     const data = _.map(zippedData, row => { return { key: row[0], values: row[1], additionalValues: row[2], colors, serieTarget: tagrets } });

src/types.ts

@@ -3,6 +3,7 @@ import { Serie, Options } from '@chartwerk/core';
 export type BarSerieParams = {
   matchedKey: string;
   colorFormatter: (serie: BarSerie) => string;
+  label: BarLabel;
 }
 export type BarSerie = Serie & Partial<BarSerieParams>;
 export type BarAdditionalOptions = {
@@ -29,6 +30,24 @@ export type RowValues = {
   key: number,
   values: number[],
   additionalValues: (null | number)[], // values in datapoints third column
-  colors: string[],
+  colors: (string | ((data: any) => string))[],
   serieTarget: string[],
 }
+
+export enum BarLabelPosition {
+  TOP = 'top',
+  CENTER = 'center',
+  BOTTOM = 'bottom',
+}
+
+export enum BarLabelPlaceholder {
+  TRIANGLE = 'triangle',
+}
+
+export type BarLabel = {
+  position: BarLabelPosition;
+  offset: number;
+  value: string;
+  valueFormatter: (data: any) => string;
+  placeholder: BarLabelPlaceholder;
+}