Symbol palette in React Diagram component

30 Oct 202424 minutes to read

The symbolPalette  is a gallery of reusable symbols and diagram elements that can be dragged and dropped on the diagram surface multiple times.

Create symbol palette

The width and height properties of the symbol palette allows to define the size of the symbol palette.

import {
  SymbolPalette,
  SymbolPaletteComponent,
} from "@syncfusion/ej2-react-diagrams";
//Initializes the symbol palette
function App() {
  return (
    <SymbolPaletteComponent id="container" width={"100%"} height={"700px"} />
  );
}
const root = ReactDOM.createRoot(document.getElementById("diagram"));
root.render(<App />);

Add nodes and palettes to SymbolPalette

The collection of predefined symbols can be added to palettes using the symbols property.

A palette displays a group of related symbols and textually annotates the group with its header. A Palettes can be added as a collection of symbol groups.

To initialize a palette, define a JSON object with the unique property ID. Additionally, include the symbols property, which contains an array of different symbols.

The following code example illustrates how to define symbols in a palette and how to add them to the symbol palette:

index.jsx

import * as React from "react";
import { createRoot } from 'react-dom/client';
import '../index.css';
import { SymbolPaletteComponent } from "@syncfusion/ej2-react-diagrams";
//Initialize the basicshapes for the symbol palette
export function getBasicShapes() {
    let basicShapes = [
        {
            id: "Rectangle",
            shape: {
                type: "Basic",
                shape: "Rectangle",
            },
        },
        {
            id: "Ellipse",
            shape: {
                type: "Basic",
                shape: "Ellipse",
            },
        },
        {
            id: "Hexagon",
            shape: {
                type: "Basic",
                shape: "Hexagon",
            },
        },
    ];
    return basicShapes;
}
//Initialize the svgshapes for the symbol palette
export function getSvgShapes() {
    let basicShapes = [
        {
            id: "node2",
            style: { fill: "none" },
            annotations: [{ content: "Start \n Text Editing" }],
            shape: {
                type: "Native",
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                    "</g>",
            },
        },
    ];
    return basicShapes;
}
//Initialize the htmlhapes for the symbol palette
export function getHtmlShapes() {
    let basicShapes = [
        {
            id: "HTML",
            borderColor: "black",
            borderWidth: 1,
            shape: {
                type: "HTML",
                content: '<div style="height:100%;width:100%;"><button type="button" style="width:100%;overflow:hidden">HTML</button></div>',
            },
        },
        {
            id: "Checkbox",
            borderColor: "black",
            borderWidth: 1,
            shape: {
                type: "HTML",
                content: '<div><div style="height:50%;width:100%;"><input type="checkbox" value="Yes" style="width:25%">Yes</input></div>' +
                    '<div style="height:50%;width:100%;"><input type="checkbox" value="No" style="width:25%">No</input></div></div>',
            },
        },
        {
            id: "Dropdown",
            borderColor: "black",
            borderWidth: 1,
            shape: {
                type: "HTML",
                content: '<div style="height:100%;width:100%;"><select style="width:100%"><option>SVG</option><option>Canvas</option></select></div>',
            },
        },
    ];
    return basicShapes;
}
//Initialize the flowshapes for the symbol palette
export function getFlowShapes() {
    let flowShapes = [
        {
            id: "process",
            shape: {
                type: "Flow",
                shape: "Process",
            },
        },
        {
            id: "document",
            shape: {
                type: "Flow",
                shape: "Document",
            },
        },
        {
            id: "predefinedprocess",
            shape: {
                type: "Flow",
                shape: "PreDefinedProcess",
            },
        },
    ];
    return flowShapes;
}
//Initializes connector symbols for the symbol palette
export function getConnectors() {
    let connectorSymbols = [
        {
            id: "Link1",
            type: "Orthogonal",
            sourcePoint: {
                x: 0,
                y: 0,
            },
            targetPoint: {
                x: 40,
                y: 40,
            },
            targetDecorator: {
                shape: "Arrow",
            },
        },
        {
            id: "Link21",
            type: "Straight",
            sourcePoint: {
                x: 0,
                y: 0,
            },
            targetPoint: {
                x: 40,
                y: 40,
            },
            targetDecorator: {
                shape: "Arrow",
            },
        },
        {
            id: "link33",
            type: "Bezier",
            sourcePoint: {
                x: 0,
                y: 0,
            },
            targetPoint: {
                x: 40,
                y: 40,
            },
            style: {
                strokeWidth: 2,
            },
            targetDecorator: {
                shape: "None",
            },
        },
    ];
    return connectorSymbols;
}
//Initialize the palettes for the symbol palette
const palettes = [
    {
        //Sets the id of the palette
        id: "flow",
        //Sets whether the palette expands/collapse its children
        expanded: true,
        //Adds the palette items to palette
        symbols: getFlowShapes(),
        //Sets the header text of the palette
        title: "Flow Shapes",
        //Sets the header icon of the palette
        iconCss: "e-ddb-icons e-flow",
    },
    {
        id: "basic",
        expanded: true,
        symbols: getBasicShapes(),
        title: "Basic Shapes",
        iconCss: "e-ddb-icons e-basic",
    },
    {
        id: "svg",
        expanded: true,
        symbols: getSvgShapes(),
        title: "SVG Shapes",
        iconCss: "e-ddb-icons e-basic",
    },
    {
        id: "html",
        expanded: true,
        symbols: getHtmlShapes(),
        title: "HTML Shapes",
        iconCss: "e-ddb-icons e-basic",
    },
    {
        id: "connectors",
        expanded: true,
        symbols: getConnectors(),
        title: "Connectors",
        iconCss: "e-ddb-icons e-connector",
    },
];
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette"
        //Defines how many palettes can be at expanded mode at a time
        expandMode={"Multiple"}
        //Defines the palette collection
        palettes={palettes}
        //Specifies the default size to render symbols
        symbolHeight={80} symbolWidth={80} />);
}
const root = createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import * as React from "react";
import { createRoot } from 'react-dom/client';
import '../index.css';
import { NodeModel, ConnectorModel, PaletteModel, SymbolPaletteComponent } from "@syncfusion/ej2-react-diagrams";
//Initialize the basicshapes for the symbol palette
export function getBasicShapes(): NodeModel[] {
  let basicShapes: NodeModel[] = [
    {
      id: "Rectangle",
      shape: {
        type: "Basic",
        shape: "Rectangle",
      },
    },
    {
      id: "Ellipse",
      shape: {
        type: "Basic",
        shape: "Ellipse",
      },
    },
    {
      id: "Hexagon",
      shape: {
        type: "Basic",
        shape: "Hexagon",
      },
    },
  ];
  return basicShapes;
}
//Initialize the svgshapes for the symbol palette
export function getSvgShapes(): NodeModel[] {
  let basicShapes: NodeModel[] = [
    {
      id: "node2",
      style: { fill: "none" },
      annotations: [{ content: "Start \n Text Editing" }],
      shape: {
        type: "Native",
        content: '<g xmlns="http://www.w3.org/2000/svg">	<g transform="translate(1 1)">		<g>			<path style="fill:#61443C;" d="M61.979,435.057c2.645-0.512,5.291-0.853,7.936-1.109c-2.01,1.33-4.472,1.791-6.827,1.28     C62.726,435.13,62.354,435.072,61.979,435.057z"/>			<path style="fill:#61443C;" d="M502.469,502.471h-25.6c0.163-30.757-20.173-57.861-49.749-66.304     c-5.784-1.581-11.753-2.385-17.749-2.389c-2.425-0.028-4.849,0.114-7.253,0.427c1.831-7.63,2.747-15.45,2.731-23.296     c0.377-47.729-34.52-88.418-81.749-95.317c4.274-0.545,8.577-0.83,12.885-0.853c25.285,0.211,49.448,10.466,67.167,28.504     c17.719,18.039,27.539,42.382,27.297,67.666c0.017,7.846-0.9,15.666-2.731,23.296c2.405-0.312,4.829-0.455,7.253-0.427     C472.572,434.123,502.783,464.869,502.469,502.471z"/>		</g>		<path style="fill:#8B685A;" d="M476.869,502.471H7.536c-0.191-32.558,22.574-60.747,54.443-67.413    c0.375,0.015,0.747,0.072,1.109,0.171c2.355,0.511,4.817,0.05,6.827-1.28c1.707-0.085,3.413-0.171,5.12-0.171    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      },
    },
    {
      id: "syncfusion",
      style: { fill: "none" },
      shape: {
        type: "Native",
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    {
      id: "network",
      style: { fill: "none" },
      shape: {
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          "</g>",
      },
    },
  ];
  return basicShapes;
}
//Initialize the htmlshapes for the symbol palette
export function getHtmlShapes(): NodeModel[] {
  let basicShapes: NodeModel[] = [
    {
      id: "HTML",
      borderColor: "black",
      borderWidth: 1,
      shape: {
        type: "HTML",
        content: '<div style="height:100%;width:100%;"><button type="button" style="width:100%;overflow:hidden">HTML</button></div>',
      },
    },
    {
      id: "Checkbox",
      borderColor: "black",
      borderWidth: 1,
      shape: {
        type: "HTML",
        content: '<div><div style="height:50%;width:100%;"><input type="checkbox" value="Yes" style="width:25%">Yes</input></div>' +
          '<div style="height:50%;width:100%;"><input type="checkbox" value="No" style="width:25%">No</input></div></div>',
      },
    },
    {
      id: "Dropdown",
      borderColor: "black",
      borderWidth: 1,
      shape: {
        type: "HTML",
        content: '<div style="height:100%;width:100%;"><select style="width:100%"><option>SVG</option><option>Canvas</option></select></div>',
      },
    },
  ];
  return basicShapes;
}
//Initialize the flowshapes for the symbol palette
export function getFlowShapes(): NodeModel[] {
  let flowShapes: NodeModel[] = [
    {
      id: "process",
      shape: {
        type: "Flow",
        shape: "Process",
      },
    },
    {
      id: "document",
      shape: {
        type: "Flow",
        shape: "Document",
      },
    },
    {
      id: "predefinedprocess",
      shape: {
        type: "Flow",
        shape: "PreDefinedProcess",
      },
    },
  ];
  return flowShapes;
}
//Initializes connector symbols for the symbol palette
export function getConnectors(): ConnectorModel[] {
  let connectorSymbols: ConnectorModel[] = [
    {
      id: "Link1",
      type: "Orthogonal",
      sourcePoint: {
        x: 0,
        y: 0,
      },
      targetPoint: {
        x: 40,
        y: 40,
      },
      targetDecorator: {
        shape: "Arrow",
      },
    },
    {
      id: "Link21",
      type: "Straight",
      sourcePoint: {
        x: 0,
        y: 0,
      },
      targetPoint: {
        x: 40,
        y: 40,
      },
      targetDecorator: {
        shape: "Arrow",
      },
    },
    {
      id: "link33",
      type: "Bezier",
      sourcePoint: {
        x: 0,
        y: 0,
      },
      targetPoint: {
        x: 40,
        y: 40,
      },
      style: {
        strokeWidth: 2,
      },
      targetDecorator: {
        shape: "None",
      },
    },
  ];
  return connectorSymbols;
}
//Initialize the palettes for the symbol palette
const palettes: PaletteModel[] = [
  {
    //Sets the id of the palette
    id: "flow",
    //Sets whether the palette expands/collapse its children
    expanded: true,
    //Adds the palette items to palette
    symbols: getFlowShapes(),
    //Sets the header text of the palette
    title: "Flow Shapes",
    //Sets the header icon of the palette
    iconCss: "e-ddb-icons e-flow",
  },
  {
    id: "basic",
    expanded: true,
    symbols: getBasicShapes(),
    title: "Basic Shapes",
    iconCss: "e-ddb-icons e-basic",
  },
  {
    id: "svg",
    expanded: true,
    symbols: getSvgShapes(),
    title: "SVG Shapes",
    iconCss: "e-ddb-icons e-basic",
  },
  {
    id: "html",
    expanded: true,
    symbols: getHtmlShapes(),
    title: "HTML Shapes",
    iconCss: "e-ddb-icons e-basic",
  },
  {
    id: "connectors",
    expanded: true,
    symbols: getConnectors(),
    title: "Connectors",
    iconCss: "e-ddb-icons e-connector",
  },
];
//Initializes the symbol palette
function App() {
  return (<SymbolPaletteComponent id="symbolpalette"
    //Defines how many palettes can be at expanded mode at a time
    expandMode={"Multiple"}
    //Defines the palette collection
    palettes={palettes}
    //Specifies the default size to render symbols
    symbolHeight={80} symbolWidth={80} />);
}
const root = createRoot(document.getElementById("container"));
root.render(<App />);

Add connectors in symbol palette

Connectors can be added to the symbol palette by defining them in the symbols array of the palette.
The following example shows how to render connectors in the symbol palette:

index.jsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import '../index.css';
import { SymbolPaletteComponent } from "@syncfusion/ej2-react-diagrams";

//Initializes connector symbols for the symbol palette
export function getConnectors() {
    let connectors = [
        {
            id: 'Straight',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Orthogonal',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Bezier',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}

const palettes = [
    {
        id: "connectors",
        expanded: true,
        symbols: getConnectors(),
        title: "Connectors",
        iconCss: "e-ddb-icons e-connector",
    },
];
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette"
        //Defines how many palettes can be at expanded mode at a time
        expandMode={"Multiple"}
        //Defines the palette collection
        palettes={palettes}
        //Specifies the default size to render symbols
        symbolHeight={80} symbolWidth={80} />);
}
const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import '../index.css';
import { SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel } from "@syncfusion/ej2-react-diagrams";

//Initializes connector symbols for the symbol palette
export function getConnectors(): ConnectorModel[] {
    let connectors: ConnectorModel[] = [
        {
            id: 'Straight',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Orthogonal',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Bezier',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}

const palettes: PaletteModel[] = [
    {
        id: "connectors",
        expanded: true,
        symbols: getConnectors(),
        title: "Connectors",
        iconCss: "e-ddb-icons e-connector",
    },
];
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette"
        //Defines how many palettes can be at expanded mode at a time
        expandMode={"Multiple"}
        //Defines the palette collection
        palettes={palettes}
        //Specifies the default size to render symbols
        symbolHeight={80} symbolWidth={80} />);
}
const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

Add group nodes in symbol palette

The symbol palette supports adding group nodes. To add group nodes to the palette, the child nodes should be defined first, followed by the parent node. Refer to the following code to see how to render group nodes in the symbol palette:

index.jsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import { SymbolPaletteComponent } from "@syncfusion/ej2-react-diagrams";

//Initializes symbols for the symbol palette
export function getGroupNodes() {
    let groups = [
        {
            id: 'n1',
            height: 50,
            width: 50,
            offsetX: 50,
            offsetY: 50,
            style: { fill: 'green' },
        },
        {
            id: 'n2',
            height: 50,
            width: 50,
            offsetX: 100,
            offsetY: 100,
            style: { fill: 'yellow' },
        },
        {
            id: 'group1',
            children: ['n1', 'n2'],
            padding: { left: 10, right: 10, top: 10, bottom: 10 },
        },
        {
            id: 'n3',
            height: 50,
            width: 50,
            offsetX: 100,
            offsetY: 100,
            style: { fill: 'pink' },
        },
        {
            id: 'n4',
            height: 50,
            width: 50,
            offsetX: 100,
            offsetY: 170,
            style: { fill: 'orange' },
        },
        {
            id: 'group2',
            children: ['n3', 'n4'],
            padding: { left: 10, right: 10, top: 10, bottom: 10 },
        },
    ];
    return groups;
}
const palettes = [
    {
        id: 'palette1',
        title: 'Group Nodes',
        symbols: getGroupNodes(),
        expanded: true,
    }
];
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette"
        //Defines how many palettes can be at expanded mode at a time
        expandMode={"Multiple"}
        //Defines the palette collection
        palettes={palettes}
        width="100%" height="100%" />);
}
const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import { SymbolPaletteComponent, NodeModel, PaletteModel } from "@syncfusion/ej2-react-diagrams";


//Initializes symbols for the symbol palette
export function getGroupNodes(): NodeModel[] {
    let groups: NodeModel[] = [
        {
            id: 'n1',
            height: 50,
            width: 50,
            offsetX: 50,
            offsetY: 50,
            style: { fill: 'green' },
        },
        {
            id: 'n2',
            height: 50,
            width: 50,
            offsetX: 100,
            offsetY: 100,
            style: { fill: 'yellow' },
        },
        {
            id: 'group1',
            children: ['n1', 'n2'],
            padding: { left: 10, right: 10, top: 10, bottom: 10 },
        },
        {
            id: 'n3',
            height: 50,
            width: 50,
            offsetX: 100,
            offsetY: 100,
            style: { fill: 'pink' },
        },
        {
            id: 'n4',
            height: 50,
            width: 50,
            offsetX: 100,
            offsetY: 170,
            style: { fill: 'orange' },
        },
        {
            id: 'group2',
            children: ['n3', 'n4'],
            padding: { left: 10, right: 10, top: 10, bottom: 10 },
        },
    ];
    return groups;
}
const palettes: PaletteModel[] = [
    {
        id: 'palette1',
        title: 'Group Nodes',
        symbols: getGroupNodes(),
        expanded: true,
    }
];
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette"
        //Defines how many palettes can be at expanded mode at a time
        expandMode={"Multiple"}
        //Defines the palette collection
        palettes={palettes}
        width="100%" height="100%" />);
}
const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

Drag and drop symbols from palette to diagram

To drag and drop symbols from the palette to the diagram canvas, mousedown on the desired symbol in the palette, drag it to the desired location on the diagram canvas, and release the mouse button to drop it.

Add symbols to palette at runtime

Symbols can be added to palette at runtime by using public method, addPaletteItem. The following example shows how to add shapes to the palette at runtime.

index.jsx

import React, { useRef } from 'react';
import ReactDOM from 'react-dom';
import { SymbolPaletteComponent, randomId } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
const expandMode = 'Multiple';
export function getBasicShapes() {
    let basicShapes = [
        {
            id: 'Rectangle',
            shape: { type: 'Basic', shape: 'Rectangle' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Ellipse',
            shape: { type: 'Basic', shape: 'Ellipse' },
            style: { strokeWidth: 2 },
        },
    ];
    return basicShapes;
}
export function getFlowShapes() {
    let flowShapes = [
        {
            id: 'Process',
            shape: { type: 'Flow', shape: 'Process' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Document',
            shape: { type: 'Flow', shape: 'Document' },
            style: { strokeWidth: 2 },
        },
    ];
    return flowShapes;
}

export function addBasicShape() {
    const node = {
        id: 'Plus' + randomId(),
        shape: { type: 'Basic', shape: 'Plus' },
        style: { strokeWidth: 2 },
    };
    /**
     * parameter 1 - The ID of the palette where the new shape is to be added.
     * parameter 2 - node/connector to be added
     */
    symbolPaletteRef.current.addPaletteItem('basic', node);
}

export function addFlowShape() {
    const node = {
        id: 'Decision' + randomId(),
        shape: { type: 'Flow', shape: 'Decision' },
        style: { strokeWidth: 2 },
    };
    /**
     * parameter 1 - The ID of the palette where the new shape is to be added.
     * parameter 2 - node/connector to be added
     */
    symbolPaletteRef.current.addPaletteItem('flow', node);
}
const palettes = [
    {
        id: 'basic',
        expanded: true,
        symbols: getBasicShapes(),
        title: 'Basic Shapes',
    },
    {
        id: 'flow',
        expanded: true,
        symbols: getFlowShapes(),
        title: 'Flow Shapes',
    },
];
function App() {
    symbolPaletteRef = useRef(null);
    return (
        <div>
            <input type="button" value="Add Basic Shape" onClick={addBasicShape} />
            <input type="button" value="Add Flow Shape" onClick={addFlowShape} />
            <SymbolPaletteComponent id="symbolpalette" ref={symbolPaletteRef} width="100%" height="100%"
                expandMode={expandMode} palettes={palettes} symbolHeight={50} symbolWidth={50}
            />
        </div>
    );
};

const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import React, { useRef } from 'react';
import ReactDOM from 'react-dom';
import { SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel, randomId } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
const expandMode = 'Multiple';
export function getBasicShapes(): NodeModel[] {
  let basicShapes: NodeModel[] = [
    {
      id: 'Rectangle',
      shape: { type: 'Basic', shape: 'Rectangle' },
      style: { strokeWidth: 2 },
    },
    {
      id: 'Ellipse',
      shape: { type: 'Basic', shape: 'Ellipse' },
      style: { strokeWidth: 2 },
    },
  ];
  return basicShapes;
}
export function getFlowShapes(): NodeModel[] {
  let flowShapes: NodeModel[] = [
    {
      id: 'Process',
      shape: { type: 'Flow', shape: 'Process' },
      style: { strokeWidth: 2 },
    },
    {
      id: 'Document',
      shape: { type: 'Flow', shape: 'Document' },
      style: { strokeWidth: 2 },
    },
  ];
  return flowShapes;
}

export function addBasicShape(): void {
  const node: NodeModel = {
    id: 'Plus' + randomId(),
    shape: { type: 'Basic', shape: 'Plus' },
    style: { strokeWidth: 2 },
  };
  /**
   * parameter 1 - The ID of the palette where the new shape is to be added.
   * parameter 2 - node/connector to be added
   */
  symbolPaletteRef.current.addPaletteItem('basic', node);
}

export function addFlowShape(): void {
  const node: NodeModel = {
    id: 'Decision' + randomId(),
    shape: { type: 'Flow', shape: 'Decision' },
    style: { strokeWidth: 2 },
  };
  /**
   * parameter 1 - The ID of the palette where the new shape is to be added.
   * parameter 2 - node/connector to be added
   */
  symbolPaletteRef.current.addPaletteItem('flow', node);
}
const palettes: PaletteModel[] = [
  {
    id: 'basic',
    expanded: true,
    symbols: getBasicShapes(),
    title: 'Basic Shapes',
  },
  {
    id: 'flow',
    expanded: true,
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
  },
];
function App() {
  symbolPaletteRef = useRef(null);
  return (
    <div>
      <input type="button" value="Add Basic Shape" onClick={addBasicShape} />
      <input type="button" value="Add Flow Shape" onClick={addFlowShape} />
      <SymbolPaletteComponent id="symbolpalette" ref={symbolPaletteRef} width="100%" height="100%"
        expandMode={expandMode} palettes={palettes} symbolHeight={50} symbolWidth={50}
      />
    </div>
  );
};

const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

Remove symbols from palette at runtime

Symbols can be removed from palette at runtime by using public method, removePaletteItem. The following example shows how to remove shapes from the palette at runtime.

index.jsx

import React, { useRef } from 'react';
import ReactDOM from 'react-dom';
import { SymbolPaletteComponent } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
const expandMode = 'Multiple';
export function getBasicShapes() {
    let basicShapes = [
        {
            id: 'Rectangle',
            shape: { type: 'Basic', shape: 'Rectangle' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Ellipse',
            shape: { type: 'Basic', shape: 'Ellipse' },
            style: { strokeWidth: 2 },
        },
    ];
    return basicShapes;
}
export function getFlowShapes() {
    let flowShapes = [
        {
            id: 'Process',
            shape: { type: 'Flow', shape: 'Process' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Document',
            shape: { type: 'Flow', shape: 'Document' },
            style: { strokeWidth: 2 },
        },
    ];
    return flowShapes;
}
export function rmvBasicShape() {
    const id = symbolPaletteRef.current.palettes[0].symbols[0]?.id;
    /**
     * parameter 1 - The ID of the palette where the shape to be removed.
     * parameter 2 - ID of the shape to be removed
     */
    symbolPaletteRef.current.removePaletteItem('basic', id);
}
export function rmvFlowShape() {
    const id = symbolPaletteRef.current.palettes[1].symbols[0]?.id;
    /**
     * parameter 1 - The ID of the palette where the shape to be removed.
     * parameter 2 - ID of the shape to be removed
     */
    symbolPaletteRef.current.removePaletteItem('flow', id);
}
const palettes = [
    {
        id: 'basic',
        expanded: true,
        symbols: getBasicShapes(),
        title: 'Basic Shapes',
    },
    {
        id: 'flow',
        expanded: true,
        symbols: getFlowShapes(),
        title: 'Flow Shapes',
    },
];
function App() {
    symbolPaletteRef = useRef(null);
    return (
        <div>
            <input type="button" value="Remove Basic Shape" onClick={rmvBasicShape} />
            <input type="button" value="Remove Flow Shape" onClick={rmvFlowShape} />
            <SymbolPaletteComponent id="symbolpalette" ref={symbolPaletteRef} width="100%" height="100%"
                expandMode={expandMode} palettes={palettes} symbolHeight={50} symbolWidth={50}
            />
        </div>
    );
};

const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import React, { useRef } from 'react';
import ReactDOM from 'react-dom';
import { SymbolPaletteComponent, NodeModel, PaletteModel } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
const expandMode = 'Multiple';
export function getBasicShapes(): NodeModel[] {
  let basicShapes: NodeModel[] = [
    {
      id: 'Rectangle',
      shape: { type: 'Basic', shape: 'Rectangle' },
      style: { strokeWidth: 2 },
    },
    {
      id: 'Ellipse',
      shape: { type: 'Basic', shape: 'Ellipse' },
      style: { strokeWidth: 2 },
    },
  ];
  return basicShapes;
}
export function getFlowShapes(): NodeModel[] {
  let flowShapes: NodeModel[] = [
    {
      id: 'Process',
      shape: { type: 'Flow', shape: 'Process' },
      style: { strokeWidth: 2 },
    },
    {
      id: 'Document',
      shape: { type: 'Flow', shape: 'Document' },
      style: { strokeWidth: 2 },
    },
  ];
  return flowShapes;
}
export function rmvBasicShape(): void {
  const id = symbolPaletteRef.current.palettes[0].symbols[0]?.id;
  /**
   * parameter 1 - The ID of the palette where the shape to be removed.
   * parameter 2 - ID of the shape to be removed
   */
  symbolPaletteRef.current.removePaletteItem('basic', id);
}
export function rmvFlowShape(): void {
  const id = symbolPaletteRef.current.palettes[1].symbols[0]?.id;
  /**
   * parameter 1 - The ID of the palette where the shape to be removed.
   * parameter 2 - ID of the shape to be removed
   */
  symbolPaletteRef.current.removePaletteItem('flow', id);
}
const palettes: PaletteModel[] = [
  {
    id: 'basic',
    expanded: true,
    symbols: getBasicShapes(),
    title: 'Basic Shapes',
  },
  {
    id: 'flow',
    expanded: true,
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
  },
];
function App() {
  symbolPaletteRef = useRef(null);
  return (
    <div>
      <input type="button" value="Remove Basic Shape" onClick={rmvBasicShape} />
      <input type="button" value="Remove Flow Shape" onClick={rmvFlowShape} />
      <SymbolPaletteComponent id="symbolpalette" ref={symbolPaletteRef} width="100%" height="100%"
        expandMode={expandMode} palettes={palettes} symbolHeight={50} symbolWidth={50}
      />
    </div>
  );
};

const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

Symbol defaults

While adding more symbols such as nodes and connectors to the palette, you can define the default settings for those objects using the getNodeDefaults and the getConnectorDefaults properties of symbol palette.
These properties allow you to specify default configurations for nodes and connectors, ensuring consistency and saving time when adding multiple symbols. By setting these properties, you can predefine attributes such as size, color, shape for nodes and line style, thickness, for connectors.

In the following example, the fill color of node and target decorator shape of connector is defined in getNodeDefaults and getConnectorDefaults respectively.

index.jsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import '../index.css';
import { SymbolPaletteComponent } from "@syncfusion/ej2-react-diagrams";

//Initialize the flowshapes for the symbol palette
export function getFlowShapes() {
    let flowShapes = [
        {
            id: "process",
            shape: {
                type: "Flow",
                shape: "Process",
            },
        },
        {
            id: "document",
            shape: {
                type: "Flow",
                shape: "Document",
            },
        },
        {
            id: "predefinedprocess",
            shape: {
                type: "Flow",
                shape: "PreDefinedProcess",
            },
        },
    ];
    return flowShapes;
}
//Initialize the connectors for the symbol palette
export function getConnectors() {
    let connectors = [
        {
            id: 'Link1',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link3',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Link21',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link23',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'link33',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}

//Returns the default properties of node
export function getNodeDefaults(node) {
    (node).style.fill = 'yellow';
    return node;
}
//Returns the default properties of connector
export function getConnectorDefaults(connector) {
    (connector).targetDecorator.shape = 'DoubleArrow';
    return connector;
}
const palettes = [{
    id: 'flow',
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
    iconCss: 'e-ddb-icons e-flow'
},
{
    id: 'connectors',
    symbols: getConnectors(),
    title: 'Connectors',
    iconCss: 'e-ddb-icons e-connector'
}];
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette" expandMode={"Multiple"} palettes={palettes}
        getNodeDefaults={getNodeDefaults} getConnectorDefaults={getConnectorDefaults} />);
}
const root = ReactDOM.createRoot(document.getElementById('container'));
root.render(<App />);

index.tsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import '../index.css';
import { SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel, SymbolInfo } from "@syncfusion/ej2-react-diagrams";

//Initialize the flowshapes for the symbol palette
export function getFlowShapes(): NodeModel[] {
  let flowShapes: NodeModel[] = [
    {
      id: "process",
      shape: {
        type: "Flow",
        shape: "Process",
      },
    },
    {
      id: "document",
      shape: {
        type: "Flow",
        shape: "Document",
      },
    },
    {
      id: "predefinedprocess",
      shape: {
        type: "Flow",
        shape: "PreDefinedProcess",
      },
    },
  ];
  return flowShapes;
}
//Initialize the connectors for the symbol palette
export function getConnectors(): ConnectorModel[] {
  let connectors: ConnectorModel[] = [
    {
      id: 'Link1',
      type: 'Orthogonal',
      sourcePoint: { x: 0, y: 0 },
      targetPoint: { x: 60, y: 60 },
      style: { strokeWidth: 1, strokeColor: '#757575' },
      targetDecorator: {
        shape: 'Arrow',
        style: { strokeColor: '#757575', fill: '#757575' },
      },
    },
    {
      id: 'link3',
      type: 'Orthogonal',
      sourcePoint: { x: 0, y: 0 },
      targetPoint: { x: 60, y: 60 },
      targetDecorator: { shape: 'None' },
      style: { strokeWidth: 1, strokeColor: '#757575' },
    },
    {
      id: 'Link21',
      type: 'Straight',
      sourcePoint: { x: 0, y: 0 },
      targetPoint: { x: 60, y: 60 },
      style: { strokeWidth: 1, strokeColor: '#757575' },
      targetDecorator: {
        shape: 'Arrow',
        style: { strokeColor: '#757575', fill: '#757575' },
      },
    },
    {
      id: 'link23',
      type: 'Straight',
      sourcePoint: { x: 0, y: 0 },
      targetPoint: { x: 60, y: 60 },
      targetDecorator: { shape: 'None' },
      style: { strokeWidth: 1, strokeColor: '#757575' },
    },
    {
      id: 'link33',
      type: 'Bezier',
      sourcePoint: { x: 0, y: 0 },
      targetPoint: { x: 60, y: 60 },
      targetDecorator: { shape: 'None' },
      style: { strokeWidth: 1, strokeColor: '#757575' },
    },
  ];
  return connectors;
}

//Returns the default properties of node
export function getNodeDefaults(node: NodeModel): NodeModel {
  (node).style.fill = 'yellow';
  return node;
}
//Returns the default properties of connector
export function getConnectorDefaults(connector: ConnectorModel): ConnectorModel {
  (connector).targetDecorator.shape = 'DoubleArrow';
  return connector;
}
const palettes: PaletteModel[] = [{
  id: 'flow',
  symbols: getFlowShapes(),
  title: 'Flow Shapes',
  iconCss: 'e-ddb-icons e-flow'
},
{
  id: 'connectors',
  symbols: getConnectors(),
  title: 'Connectors',
  iconCss: 'e-ddb-icons e-connector'
}];
//Initializes the symbol palette
function App() {
  return (<SymbolPaletteComponent id="symbolpalette" expandMode={"Multiple"} palettes={palettes}
    getNodeDefaults={getNodeDefaults} getConnectorDefaults={getConnectorDefaults} />);
}
const root = ReactDOM.createRoot(document.getElementById('container'));
root.render(<App />);

Add palettes at runtime

You can dynamically add palettes to the symbol palette at runtime to enhance flexibility and customization. This allows you to introduce new groups of symbols as needed without having to reload or reinitialize the diagram. The addPalettesmethod of the symbol palette enables you to create and configure new palettes programmatically. This method takes parameters that define the palette’s properties, such as the palette ID, title, and the symbols it contains.

Follow the example below to see how to add a palette at runtime.

index.jsx

import * as React from "react";
import { useRef } from 'react';
import { createRoot } from 'react-dom/client';
import { SymbolPaletteComponent, randomId } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
export function getConnectors() {
    let connectors = [
        {
            id: 'Link1',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link3',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Link21',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link23',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'link33',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}

export function getFlowShapes() {
    let flowShapes = [
        {
            id: 'Process',
            shape: { type: 'Flow', shape: 'Process' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Document',
            shape: { type: 'Flow', shape: 'Document' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'predefinedprocess',
            shape: {
                type: 'Flow',
                shape: 'PreDefinedProcess',
            },
        },
    ];
    return flowShapes;
}

export function addPalette() {
    const newPaletteShapes = [
        {
            id: 'rectangle' + randomId(),
            shape: { type: 'Basic', shape: 'Rectangle' },
        },
        {
            id: 'plus' + randomId(),
            shape: { type: 'Basic', shape: 'Plus' },
        },
    ];
    const newPalette = [
        {
            id: 'basic' + randomId(),
            symbols: newPaletteShapes,
            title: 'New Shapes',
        },
    ];
    /**
     * parameter - The new palette to be added in symbol palette.
     */
    symbolPaletteRef.current.addPalettes(newPalette);
};
const palettes = [{
    id: 'flow',
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
},
{
    id: 'connectors',
    symbols: getConnectors(),
    title: 'Connectors',
}];
function App() {
    symbolPaletteRef = useRef(null);
    return (
        <div>
            <input type="button" value="Add Palette" onClick={addPalette} />
            <SymbolPaletteComponent id="symbolpalette" ref={symbolPaletteRef} palettes={palettes} />
        </div>
    );
};

const root = createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import * as React from "react";
import { useRef } from 'react';
import { createRoot } from 'react-dom/client';
import { SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel, randomId } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
export function getConnectors(): ConnectorModel[] {
    let connectors: ConnectorModel[] = [
        {
            id: 'Link1',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link3',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Link21',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link23',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'link33',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}

export function getFlowShapes(): NodeModel[] {
    let flowShapes: NodeModel[] = [
        {
            id: 'Process',
            shape: { type: 'Flow', shape: 'Process' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Document',
            shape: { type: 'Flow', shape: 'Document' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'predefinedprocess',
            shape: {
                type: 'Flow',
                shape: 'PreDefinedProcess',
            },
        },
    ];
    return flowShapes;
}

export function addPalette(): void {
    const newPaletteShapes: NodeModel[] = [
        {
            id: 'rectangle' + randomId(),
            shape: { type: 'Basic', shape: 'Rectangle' },
        },
        {
            id: 'plus' + randomId(),
            shape: { type: 'Basic', shape: 'Plus' },
        },
    ];
    const newPalette: PaletteModel[] = [
        {
            id: 'basic' + randomId(),
            symbols: newPaletteShapes,
            title: 'New Shapes',
        },
    ];
    /**
     * parameter - The new palette to be added in symbol palette.
     */
    symbolPaletteRef.current.addPalettes(newPalette);
};
const palettes: PaletteModel[] = [{
    id: 'flow',
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
},
{
    id: 'connectors',
    symbols: getConnectors(),
    title: 'Connectors',
}];
function App() {
    symbolPaletteRef = useRef(null);
    return (
        <div>
            <input type="button" value="Add Palette" onClick={addPalette} />
            <SymbolPaletteComponent id="symbolpalette" palettes={palettes} ref={symbolPaletteRef} />
        </div>
    );
};

const root = createRoot(document.getElementById("container"));
root.render(<App />);

Remove palettes at runtime

You can remove palettes from the symbol palette at runtime. There are two ways to do this:

• Use the removePalette method to remove a single palette by its ID.
• Use the removePalettes method to remove multiple palettes by passing an array of palette IDs as a parameter.

Follow the example below to see how to remove palettes at runtime.

index.jsx

import React, { useRef } from 'react';
import ReactDOM from 'react-dom';
import { SymbolPaletteComponent } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
const expandMode = 'Multiple';
export function getConnectors() {
    let connectors = [
        {
            id: 'Link1',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link3',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Link21',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link23',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'link33',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}
export function getFlowShapes() {
    let flowShapes = [
        {
            id: 'Process',
            shape: { type: 'Flow', shape: 'Process' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Document',
            shape: { type: 'Flow', shape: 'Document' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'predefinedprocess',
            shape: {
                type: 'Flow',
                shape: 'PreDefinedProcess',
            },
        },
    ];
    return flowShapes;
}
export function getBasicShapes() {
    let basicShapes = [
        {
            id: 'rectangle',
            shape: {
                type: 'Basic',
                shape: 'Rectangle',
            },
        },
        {
            id: 'plus',
            shape: {
                type: 'Basic',
                shape: 'Plus',
            },
        },
        {
            id: 'triangle',
            shape: {
                type: 'Basic',
                shape: 'RightTriangle',
            },
        },
    ];
    return basicShapes;
}
export function removePalette() {
    /**
     * parameter - The ID of palette to be removed in symbol palette.
     */
    symbolPaletteRef.current.removePalette('basic');
    symbolPaletteRef.current.refresh();
};
export function removePalettes() {
    let palettes = ['flow', 'connectors'];
    /**
     * parameter - The ID array of palettes to be removed in symbol palette.
     */
    symbolPaletteRef.current.removePalettes(palettes);
    symbolPaletteRef.current.refresh();
};
const palettes = [{
    id: 'flow',
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
},
{
    id: 'basic',
    symbols: getBasicShapes(),
    title: 'Basic Shapes',
},
{
    id: 'connectors',
    symbols: getConnectors(),
    title: 'Connectors',
}];
function App() {
    symbolPaletteRef = useRef(null);
    return (
        <div>
            <input type="button" value="Remove Palette" onClick={removePalette} />
            <input type="button" value="Remove Palettes" onClick={removePalettes} />
            <SymbolPaletteComponent
                id="symbolpalette"
                width="100%"
                height="100%"
                expandMode={expandMode}
                palettes={palettes}
                ref={symbolPaletteRef}
            />
        </div>
    );
};

const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

index.tsx

import React, { useRef } from 'react';
import ReactDOM from 'react-dom';
import { SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel } from '@syncfusion/ej2-react-diagrams';

let symbolPaletteRef;
const expandMode = 'Multiple';
export function getConnectors(): ConnectorModel[] {
    let connectors: ConnectorModel[] = [
        {
            id: 'Link1',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link3',
            type: 'Orthogonal',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'Link21',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            style: { strokeWidth: 1, strokeColor: '#757575' },
            targetDecorator: {
                shape: 'Arrow',
                style: { strokeColor: '#757575', fill: '#757575' },
            },
        },
        {
            id: 'link23',
            type: 'Straight',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
        {
            id: 'link33',
            type: 'Bezier',
            sourcePoint: { x: 0, y: 0 },
            targetPoint: { x: 60, y: 60 },
            targetDecorator: { shape: 'None' },
            style: { strokeWidth: 1, strokeColor: '#757575' },
        },
    ];
    return connectors;
}
export function getFlowShapes(): NodeModel[] {
    let flowShapes: NodeModel = [
        {
            id: 'Process',
            shape: { type: 'Flow', shape: 'Process' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'Document',
            shape: { type: 'Flow', shape: 'Document' },
            style: { strokeWidth: 2 },
        },
        {
            id: 'predefinedprocess',
            shape: {
                type: 'Flow',
                shape: 'PreDefinedProcess',
            },
        },
    ];
    return flowShapes;
}
export function getBasicShapes(): NodeModel[] {
    let basicShapes: NodeModel[] = [
        {
            id: 'rectangle',
            shape: {
                type: 'Basic',
                shape: 'Rectangle',
            },
        },
        {
            id: 'plus',
            shape: {
                type: 'Basic',
                shape: 'Plus',
            },
        },
        {
            id: 'triangle',
            shape: {
                type: 'Basic',
                shape: 'RightTriangle',
            },
        },
    ];
    return basicShapes;
}
export function removePalette(): void {
    /**
     * parameter - The ID of palette to be removed in symbol palette.
     */
    symbolPaletteRef.current.removePalette('basic');
    symbolPaletteRef.current.refresh();
};
export function removePalettes(): void {
    let palettes = ['flow', 'connectors'];
    /**
     * parameter - The ID array of palettes to be removed in symbol palette.
     */
    symbolPaletteRef.current.removePalettes(palettes);
    symbolPaletteRef.current.refresh();
};
const palettes: PaletteModel[] = [{
    id: 'flow',
    symbols: getFlowShapes(),
    title: 'Flow Shapes',
},
{
    id: 'basic',
    symbols: getBasicShapes(),
    title: 'Basic Shapes',
},
{
    id: 'connectors',
    symbols: getConnectors(),
    title: 'Connectors',
}];
function App() {
    symbolPaletteRef = useRef(null);
    return (
        <div>
            <input type="button" value="Remove Palette" onClick={removePalette} />
            <input type="button" value="Remove Palettes" onClick={removePalettes} />
            <SymbolPaletteComponent
                id="symbolpalette"
                width="100%"
                height="100%"
                expandMode={expandMode}
                palettes={palettes}
                ref={symbolPaletteRef}
            />
        </div>
    );
};

const root = ReactDOM.createRoot(document.getElementById("container"));
root.render(<App />);

Stretch the symbols into the palette

The fit property defines whether the symbol has to be fit inside the size, that is defined by the symbol palette. For example, when you resize the rectangle in the symbol, ratio of the rectangle size has to be maintained rather changing into square shape. The following code example illustrates how to customize the symbol size.

index.jsx

import * as React from "react";
import { createRoot } from 'react-dom/client';
import { SymbolPaletteComponent } from "@syncfusion/ej2-react-diagrams";

//Initialize the basicshapes for the symbol palette
export function getBasicShapes() {
    let basicShapes = [
        {
            id: 'Rectangle', width: 200,
            shape: {
                type: 'Basic',
                shape: 'Rectangle'
            }
        },
        {
            id: 'Ellipse', width: 200,
            shape: {
                type: 'Basic',
                shape: 'Ellipse'
            }
        },
        {
            id: 'Hexagon', width: 200,
            shape: {
                type: 'Basic',
                shape: 'Hexagon'
            }
        }
    ];
    return basicShapes;
}
const palettes = [
    {
        id: 'basic',
        expanded: true,
        symbols: getBasicShapes(),
        title: 'Basic Shapes',
        iconCss: 'e-ddb-icons e-basic',
    },
];
export function getSymbolInfo(symbol) {
    // Enables to fit the content into the specified palette item size
    return {
        fit: true,
    };
    // When it is set as false, the element is rendered with actual node size
}
//Initializes the symbol palette
function App() {
    return (<SymbolPaletteComponent id="symbolpalette" width="100%" height="700px"
        palettes={palettes} symbolHeight={80} symbolWidth={80}
        //Sets the size, appearance and description of a symbol
        getSymbolInfo={getSymbolInfo} />);
}
const root = createRoot(document.getElementById('container'));
root.render(<App />);

index.tsx

import * as React from "react";
import { createRoot } from 'react-dom/client';
import { SymbolPaletteComponent, NodeModel, PaletteModel, SymbolInfo } from "@syncfusion/ej2-react-diagrams";

//Initialize the basicshapes for the symbol palette
export function getBasicShapes(): NodeModel[] {
  let basicShapes: NodeModel[] = [
    {
      id: 'Rectangle', width: 200,
      shape: {
        type: 'Basic',
        shape: 'Rectangle'
      }
    },
    {
      id: 'Ellipse', width: 200,
      shape: {
        type: 'Basic',
        shape: 'Ellipse'
      }
    },
    {
      id: 'Hexagon', width: 200,
      shape: {
        type: 'Basic',
        shape: 'Hexagon'
      }
    }
  ];
  return basicShapes;
}
const palettes = [
  {
    id: 'basic',
    expanded: true,
    symbols: getBasicShapes(),
    title: 'Basic Shapes',
    iconCss: 'e-ddb-icons e-basic',
  },
];
export function getSymbolInfo(symbol: NodeModel): SymbolInfo {
  // Enables to fit the content into the specified palette item size
  return {
    fit: true,
  };
  // When it is set as false, the element is rendered with actual node size
}
//Initializes the symbol palette
function App() {
  return (<SymbolPaletteComponent id="symbolpalette" width="100%" height="700px"
    palettes={palettes} symbolHeight={80} symbolWidth={80}
    //Sets the size, appearance and description of a symbol
    getSymbolInfo={getSymbolInfo} />);
}
const root = createRoot(document.getElementById('container'));
root.render(<App />);

Refresh symbol palette

The refresh method allows you to refresh the symbols dynamically in the SymbolPalette.

//To refresh the symbols in symbol palette
symbolPalette.refresh();