@rinminase/ng-charts
Version:
Reactive, responsive, beautiful charts for Angular based on ng2-charts
87 lines • 11.7 kB
JavaScript
import { defaultColors } from "./default-colors";
/**
* Generate colors by chart type
*/
export function getColors(chartType, index, count) {
if (chartType === "pie" || chartType === "doughnut") {
return formatPieColors(generateColors(count));
}
if (chartType === "polarArea") {
return formatPolarAreaColors(generateColors(count));
}
if (chartType === "line" || chartType === "radar") {
return formatLineColor(generateColor(index));
}
if (chartType === "bar" || chartType === "horizontalBar") {
return formatBarColor(generateColor(index));
}
if (chartType === "bubble") {
return formatPieColors(generateColors(count));
}
if (chartType === "scatter") {
return formatPieColors(generateColors(count));
}
throw new Error(`getColors - Unsupported chart type ${chartType}`);
}
function rgba(colour, alpha) {
return "rgba(" + colour.concat(alpha).join(",") + ")";
}
function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
function formatLineColor(colors) {
return {
backgroundColor: rgba(colors, 0.4),
borderColor: rgba(colors, 1),
pointBackgroundColor: rgba(colors, 1),
pointBorderColor: "#fff",
pointHoverBackgroundColor: "#fff",
pointHoverBorderColor: rgba(colors, 0.8),
};
}
function formatBarColor(colors) {
return {
backgroundColor: rgba(colors, 0.6),
borderColor: rgba(colors, 1),
hoverBackgroundColor: rgba(colors, 0.8),
hoverBorderColor: rgba(colors, 1),
};
}
function formatPieColors(colors) {
return {
backgroundColor: colors.map((color) => rgba(color, 0.6)),
borderColor: colors.map(() => "#fff"),
pointBackgroundColor: colors.map((color) => rgba(color, 1)),
pointBorderColor: colors.map(() => "#fff"),
pointHoverBackgroundColor: colors.map((color) => rgba(color, 1)),
pointHoverBorderColor: colors.map((color) => rgba(color, 1)),
};
}
function formatPolarAreaColors(colors) {
return {
backgroundColor: colors.map((color) => rgba(color, 0.6)),
borderColor: colors.map((color) => rgba(color, 1)),
hoverBackgroundColor: colors.map((color) => rgba(color, 0.8)),
hoverBorderColor: colors.map((color) => rgba(color, 1)),
};
}
function getRandomColor() {
return [getRandomInt(0, 255), getRandomInt(0, 255), getRandomInt(0, 255)];
}
/**
* Generate colors for line|bar charts
*/
function generateColor(index) {
return defaultColors[index] || getRandomColor();
}
/**
* Generate colors for pie|doughnut charts
*/
function generateColors(count) {
const colorsArr = new Array(count);
for (let i = 0; i < count; i++) {
colorsArr[i] = defaultColors[i] || getRandomColor();
}
return colorsArr;
}
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Unsupported chart type ${chartType}`);\n}\n\nfunction rgba(colour: Array<number>, alpha: number): string {\n  return \"rgba(\" + colour.concat(alpha).join(\",\") + \")\";\n}\n\nfunction getRandomInt(min: number, max: number): number {\n  return Math.floor(Math.random() * (max - min + 1)) + min;\n}\n\nfunction formatLineColor(colors: Array<number>): DatasetColor {\n  return {\n    backgroundColor: rgba(colors, 0.4),\n    borderColor: rgba(colors, 1),\n    pointBackgroundColor: rgba(colors, 1),\n    pointBorderColor: \"#fff\",\n    pointHoverBackgroundColor: \"#fff\",\n    pointHoverBorderColor: rgba(colors, 0.8),\n  };\n}\n\nfunction formatBarColor(colors: Array<number>): DatasetColor {\n  return {\n    backgroundColor: rgba(colors, 0.6),\n    borderColor: rgba(colors, 1),\n    hoverBackgroundColor: rgba(colors, 0.8),\n    hoverBorderColor: rgba(colors, 1),\n  };\n}\n\nfunction formatPieColors(colors: Array<number[]>): Colors {\n  return {\n    backgroundColor: colors.map((color: number[]) => rgba(color, 0.6)),\n    borderColor: colors.map(() => \"#fff\"),\n    pointBackgroundColor: colors.map((color: number[]) => rgba(color, 1)),\n    pointBorderColor: colors.map(() => \"#fff\"),\n    pointHoverBackgroundColor: colors.map((color: number[]) => rgba(color, 1)),\n    pointHoverBorderColor: colors.map((color: number[]) => rgba(color, 1)),\n  };\n}\n\nfunction formatPolarAreaColors(colors: Array<number[]>): DatasetColor {\n  return {\n    backgroundColor: colors.map((color: number[]) => rgba(color, 0.6)),\n    borderColor: colors.map((color: number[]) => rgba(color, 1)),\n    hoverBackgroundColor: colors.map((color: number[]) => rgba(color, 0.8)),\n    hoverBorderColor: colors.map((color: number[]) => rgba(color, 1)),\n  };\n}\n\nfunction getRandomColor(): number[] {\n  return [getRandomInt(0, 255), getRandomInt(0, 255), getRandomInt(0, 255)];\n}\n\n/**\n * Generate colors for line|bar charts\n */\nfunction generateColor(index: number): number[] {\n  return defaultColors[index] || getRandomColor();\n}\n\n/**\n * Generate colors for pie|doughnut charts\n */\nfunction generateColors(count: number): Array<number[]> {\n  const colorsArr: Array<number[]> = new Array(count);\n  for (let i = 0; i < count; i++) {\n    colorsArr[i] = defaultColors[i] || getRandomColor();\n  }\n  return colorsArr;\n}\n"]}