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Pie with Custom Fill Styles

This demo uses custom patterns and gradients for PieChart slices.

Backend API
<template> <DxPieChart id="pie" :data-source="data" :customize-point="customizePoint" > <DxSeries argument-field="type" value-field="value" > <DxLabel :visible="true" :customize-text="customizeText" > <DxConnector :visible="true"/> </DxLabel> </DxSeries> <DxExport :enabled="true"/> </DxPieChart> </template> <script setup lang="ts"> import DxPieChart, { DxSeries, DxLabel, DxConnector, DxExport, } from 'devextreme-vue/pie-chart'; import { getStrokePattern, getSquarePattern, getLinearGradient, getRadialGradient, getPatternImage, } from './utils.js'; import { data } from './data.ts'; function customizePoint(point) { const color = point.series.getPointsByArg(point.argument)[0].getColor(); let fillId; switch (point.argument) { case 'Stripes': fillId = getStrokePattern(color); break; case 'Grid': fillId = getSquarePattern(color); break; case 'Linear Gradient': fillId = getLinearGradient(color); break; case 'Radial Gradient': fillId = getRadialGradient(color); break; case 'Image': fillId = getPatternImage(color); break; default: break; } return { color: { fillId } }; } const customizeText = ({ argument }) => argument; </script> <style> #pie { height: 440px; } </style>
window.exports = window.exports || {}; window.config = { transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader', }, '*.ts': { loader: 'demo-ts-loader', }, '*.svg': { loader: 'svg-loader', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, }, paths: { 'root:': '../../../../', 'npm:': 'https://unpkg.com/', }, map: { 'vue': 'npm:vue@3.2.47/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.1.1/index.js', 'demo-ts-loader': 'root:utils/demo-ts-loader.js', 'svg-loader': 'root:utils/svg-loader.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@24.1.4/cjs', 'devextreme-vue': 'npm:devextreme-vue@24.1.4/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.10/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'devextreme-vue': { main: 'index.js', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.13/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, }, }; System.config(window.config);
export const data = [{ type: 'Stripes', value: 1, }, { type: 'Grid', value: 1, }, { type: 'Linear Gradient', value: 1, }, { type: 'Radial Gradient', value: 1, }, { type: 'Image', value: 1, }];
import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');
import * as chartMethods from 'devextreme/common/charts'; const { registerGradient, registerPattern } = chartMethods.default; const imagePatternSize = 12; const shapePatternSize = 6; function hexToRgb(hex, opacity = 1) { const hexColorParts = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex); return `rgba(${parseInt(hexColorParts[1], 16)}, ${parseInt(hexColorParts[2], 16)}, ${parseInt(hexColorParts[3], 16)}, ${opacity})`; } function getGradient(type, color1, color2) { return registerGradient(type, { colors: [{ offset: '20%', color: color1, }, { offset: '90%', color: color2, }], }); } export function getLinearGradient(color) { return getGradient('linear', color, hexToRgb(color, 0.5)); } export function getRadialGradient(color) { return getGradient('radial', hexToRgb(color, 0.5), color); } export function getPatternImage(color) { return registerPattern({ width: imagePatternSize, height: imagePatternSize, template: (container) => { const rect = createRect(imagePatternSize, color); const image = document.createElementNS('http://www.w3.org/2000/svg', 'image'); image.setAttribute('x', 0); image.setAttribute('y', 0); image.setAttribute('width', imagePatternSize); image.setAttribute('height', imagePatternSize); image.setAttribute('href', '../../../../images/Charts/PieWithCustomStyles/diamond.svg'); image.setAttribute('opacity', '0.6'); container.appendChild(rect); container.appendChild(image); }, }); } export function getStrokePattern(color) { return registerPattern({ width: shapePatternSize, height: shapePatternSize, template: (container) => { const halfSize = shapePatternSize / 2; const oneAndAHalfSize = shapePatternSize * 1.5; const d = `M ${halfSize} ${-halfSize} L ${-halfSize} ${halfSize} M 0 ${shapePatternSize} L ${shapePatternSize} 0 M ${oneAndAHalfSize} ${halfSize} L ${halfSize} ${oneAndAHalfSize}`; const path = document.createElementNS('http://www.w3.org/2000/svg', 'path'); path.setAttribute('stroke', color); path.setAttribute('stroke-width', 2); path.setAttribute('d', d); container.appendChild(path); }, }); } export function getSquarePattern(color) { return registerPattern({ width: shapePatternSize, height: shapePatternSize, template: (container) => { const rect = createRect(shapePatternSize, null, color, 2); container.appendChild(rect); }, }); } function createRect(size, fill, stroke, strokeWidth) { const rect = document.createElementNS('http://www.w3.org/2000/svg', 'rect'); rect.setAttribute('x', 0); rect.setAttribute('y', 0); rect.setAttribute('width', size); rect.setAttribute('height', size); rect.setAttribute('fill', fill); rect.setAttribute('stroke', stroke); rect.setAttribute('stroke-width', strokeWidth); return rect; }
<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.4/css/dx.light.css" /> <script src="https://unpkg.com/typescript@4.9.5/lib/typescript.js"></script> <script type="module"> import * as vueCompilerSFC from "https://unpkg.com/@vue/compiler-sfc@3.4.16/dist/compiler-sfc.esm-browser.js"; window.vueCompilerSFC = vueCompilerSFC; </script> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.ts"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>

Gradient

Call the registerGradient() method to obtain a gradient ID. Specify method arguments as follows:

  • type
    This method supports two gradient types: 'linear' and 'radial'.

  • options
    An object for gradient options.

    • colors
      An array of gradient colors. Each color is an object that includes color and offset fields. The offset field specifies the starting point for each color.

    • rotationAngle (linear gradients only)
      You can use this option to rotate linear gradients.

Pattern

To obtain a pattern ID, call the registerPattern() method. Specify method arguments as follows:

  • options
    An object with pattern options.

    • height
      Template height.

    • width
      Template width.

    • template
      A repeating SVG-based template that creates the required pattern.

Fill the PieChart

To fill all slices with the same pattern or gradient, assign a pattern ID to series.color.fillId. If you want to customize each slice individually, implement the customizePoint function (review this demo for more information).

Custom patterns and gradients are not limited to the PieChart. The following DevExtreme components support the use of patterns/gradients: