Utilities and G2 Integration

/**
 * Measures the width of text with specified font
 * @param text - Text to measure
 * @param font - Font specification (CSS font format)
 * @returns Width of the text in pixels
 */
function measureTextWidth(text: string, font?: string): number;

import { measureTextWidth } from "@ant-design/plots";

// Measure text with default font
const width1 = measureTextWidth('Hello World');
console.log(`Width: ${width1}px`);

// Measure text with custom font
const width2 = measureTextWidth('Hello World', '14px Arial');
console.log(`Width with Arial: ${width2}px`);

// Use in chart configuration for dynamic label positioning
const data = [
  { label: 'Very Long Category Name', value: 100 },
  { label: 'Short', value: 80 },
];

const config = {
  data,
  xField: 'label',
  yField: 'value',
  label: {
    formatter: (datum) => {
      const width = measureTextWidth(datum.label, '12px sans-serif');
      return width > 60 ? datum.label.substring(0, 8) + '...' : datum.label;
    },
  },
};

/**
 * Complete G2 visualization library
 * Provides access to all G2 classes, functions, and utilities
 */
const G2: typeof import('@antv/g2');

import { G2 } from "@ant-design/plots";

// Access G2 classes directly
const { Chart, View, Scale } = G2;

// Create a custom G2 chart
const customChart = new Chart({
  container: 'container',
  width: 400,
  height: 300,
});

customChart
  .data([
    { genre: 'Sports', sold: 275 },
    { genre: 'Strategy', sold: 115 },
    { genre: 'Action', sold: 120 },
  ])
  .encode('x', 'genre')
  .encode('y', 'sold')
  .coordinate({ transform: [{ type: 'transpose' }] });

customChart.render();

/**
 * Chart event types and utilities from G2
 */
const ChartEvent: typeof import('@antv/g2').ChartEvent;

import React, { useRef } from "react";
import { Line, ChartEvent } from "@ant-design/plots";

const InteractiveChart: React.FC = () => {
  const chartRef = useRef();

  const handleReady = (chart) => {
    chartRef.current = chart;
    
    // Listen to G2 chart events
    chart.on(ChartEvent.CLICK, (event) => {
      console.log('Chart clicked:', event);
    });
    
    chart.on(ChartEvent.HOVER, (event) => {
      console.log('Chart hovered:', event);
    });
    
    chart.on('element:click', (event) => {
      console.log('Element clicked:', event.data);
    });
  };

  const config = {
    data: [/* data */],
    xField: 'x',
    yField: 'y',
    onReady: handleReady,
  };

  return <Line {...config} ref={chartRef} />;
};

/**
 * G2 registration system for custom components
 */
const register: typeof import('@antv/g2').register;

import { register, G2 } from "@ant-design/plots";

// Register a custom shape
register('shape', 'custom-rect', (style, context) => {
  const { document } = context;
  return document.createElement('rect', {
    style: {
      ...style,
      rx: 4, // rounded corners
    },
  });
});

// Register a custom interaction
register('interaction', 'custom-highlight', (context) => {
  return {
    start: () => {
      // Interaction start logic
    },
    end: () => {
      // Interaction end logic
    },
  };
});

// Use custom components in charts
const config = {
  data: [/* data */],
  xField: 'x',
  yField: 'y',
  style: {
    shape: 'custom-rect', // Use custom shape
  },
  interactions: [
    { type: 'custom-highlight' }, // Use custom interaction
  ],
};

interface Chart {
  /** Export chart as data URL */
  toDataURL?: (type?: string, encoderOptions?: number) => string;
  /** Download chart as image */
  downloadImage?: (name?: string, type?: string, encoderOptions?: number) => string;
  /** G2 chart instance methods */
  render(): void;
  clear(): void;
  destroy(): void;
  changeData(data: any[]): void;
  changeSize(width: number, height: number): void;
  on(event: string, callback: Function): void;
  off(event: string, callback?: Function): void;
  emit(event: string, ...args: any[]): void;
  /** Access to underlying G2 chart */
  chart?: import('@antv/g2').Chart;
}

import React, { useRef } from "react";
import { Line } from "@ant-design/plots";

const AdvancedChart: React.FC = () => {
  const chartRef = useRef<Chart>();

  const handleExport = () => {
    if (chartRef.current) {
      // Export as image
      const dataURL = chartRef.current.toDataURL('image/png', 1.0);
      console.log('Chart exported:', dataURL);
      
      // Download image
      chartRef.current.downloadImage('chart', 'png');
    }
  };

  const handleUpdateData = (newData: any[]) => {
    if (chartRef.current) {
      // Update chart data without re-render
      chartRef.current.changeData(newData);
    }
  };

  const config = {
    data: [/* initial data */],
    xField: 'x',
    yField: 'y',
    onReady: (chart) => {
      chartRef.current = chart;
    },
  };

  return (
    <div>
      <Line {...config} />
      <button onClick={handleExport}>Export Chart</button>
      <button onClick={() => handleUpdateData([/* new data */])}>
        Update Data
      </button>
    </div>
  );
};

/**
 * Chart component factory function
 * Creates React components for G2 chart types
 */
function makeChartComp<C>(
  chartType: string
): ForwardRefExoticComponent<PropsWithoutRef<C> & RefAttributes<Chart>>;

import React from "react";
import { makeChartComp } from "@ant-design/plots";
import type { CommonConfig } from "@ant-design/plots";

// Define custom chart configuration
interface CustomChartConfig extends CommonConfig {
  customProp?: string;
  specialOption?: boolean;
}

// Create custom chart component
const CustomChart = makeChartComp<CustomChartConfig>('Custom');

// Use the custom chart
const MyCustomChart: React.FC = () => {
  const config = {
    data: [/* data */],
    xField: 'x',
    yField: 'y',
    customProp: 'custom value',
    specialOption: true,
  };

  return <CustomChart {...config} />;
};

// G2 scale types and utilities
interface ScaleConfig {
  type?: 'linear' | 'log' | 'pow' | 'sqrt' | 'symlog' | 'time' | 'ordinal' | 'point' | 'band';
  domain?: any[];
  range?: any[];
  nice?: boolean;
  clamp?: boolean;
  round?: boolean;
  tickCount?: number;
  tickInterval?: number;
  min?: number;
  max?: number;
  minLimit?: number;
  maxLimit?: number;
  base?: number;
  exponent?: number;
  constant?: number;
  formatter?: (value: any) => string;
}

// G2 theme configuration
interface G2Theme {
  /** Color palette */
  colors10?: string[];
  colors20?: string[];
  /** Background colors */
  backgroundColor?: string;
  subColor?: string;
  /** Semantic colors */
  semanticRed?: string;
  semanticGreen?: string;
  semanticYellow?: string;
  /** Typography */
  fontFamily?: string;
  /** Component styles */
  axis?: Record<string, any>;
  legend?: Record<string, any>;
  tooltip?: Record<string, any>;
  annotation?: Record<string, any>;
}

// G2 animation configuration
interface G2Animation {
  /** Animation type */
  type?: 'appear' | 'enter' | 'update' | 'leave';
  /** Animation name */
  animation?: string;
  /** Animation duration in milliseconds */
  duration?: number;
  /** Animation delay in milliseconds */
  delay?: number;
  /** Easing function */
  easing?: string | Function;
  /** Animation callback */
  callback?: Function;
}

// G2 coordinate transformations
interface CoordinateTransform {
  type: 'transpose' | 'reflect' | 'rotate' | 'scale' | 'translate' | 'polar' | 'helix' | 'parallel';
  cfg?: Record<string, any>;
}

// Coordinate system configuration
interface CoordinateConfig {
  transform?: CoordinateTransform[];
  start?: [number, number];
  end?: [number, number];
}

// Performance optimization utilities
interface PerformanceUtils {
  /** Debounce chart updates */
  debounceUpdate(fn: Function, delay: number): Function;
  /** Throttle chart interactions */
  throttleInteraction(fn: Function, limit: number): Function;
  /** Optimize large datasets */
  sampleData(data: any[], maxPoints: number): any[];
  /** Virtual scrolling for large datasets */
  virtualizeData(data: any[], viewport: { start: number; end: number }): any[];
}

import React, { useMemo, useCallback } from "react";
import { Line } from "@ant-design/plots";

const PerformantChart: React.FC<{ data: any[] }> = ({ data }) => {
  // Optimize large datasets
  const optimizedData = useMemo(() => {
    if (data.length > 1000) {
      // Sample data for performance
      const step = Math.ceil(data.length / 1000);
      return data.filter((_, index) => index % step === 0);
    }
    return data;
  }, [data]);

  // Debounce updates
  const debouncedUpdate = useCallback(
    debounce((newData) => {
      // Update chart with new data
    }, 300),
    []
  );

  const config = {
    data: optimizedData,
    xField: 'x',
    yField: 'y',
    // Disable animations for large datasets
    animation: data.length > 500 ? false : true,
  };

  return <Line {...config} />;
};