Symbol palette in Angular Diagram component
28 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.
@Component({
selector: "app-container",
template: `<ejs-symbolpalette id="symbolpalette"width="100%" height="700px">
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {}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:
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramModule, SymbolPaletteModule, NodeModel, ConnectorModel, PaletteModel } from '@syncfusion/ej2-angular-diagrams';
import { ExpandMode } from '@syncfusion/ej2-navigations';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<ejs-symbolpalette id="symbolpalette"width="100%" height="700px" [expandMode]="expandMode" [palettes]="palettes" [symbolHeight]=80 [symbolWidth]=80>
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public expandMode: ExpandMode = 'Multiple';
public 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: this.getFlowShapes(),
//Sets the header text of the palette
title: 'Flow Shapes',
iconCss: 'e-ddb-icons e-flow'
},
{
id: 'basic',
expanded: true,
symbols: this.getBasicShapes(),
title: 'Basic Shapes',
iconCss: 'e-ddb-icons e-basic'
},
{
id: 'SVG',
expanded: true,
symbols: this.getSvgShapes(),
title: 'SVG Shapes',
iconCss: 'e-ddb-icons e-basic'
},
{
id: 'html',
expanded: true,
symbols: this.getHtmlShapes(),
title: 'HTML Shapes',
iconCss: 'e-ddb-icons e-basic'
},
{
id: 'connectors',
expanded: true,
symbols: this.getConnectors(),
title: 'Connectors',
iconCss: 'e-ddb-icons e-connector'
}
];
public 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;
};
public 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;
};
public 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;
};
//Initializes the SVG shapes for the symbol palette
public getSvgShapes(): NodeModel[] {
let svgSymbols: NodeModel[] = [
{
id: 'node2', style: { fill: 'none' },
annotations: [{ content: 'Start \n Text Editing' }],
shape: {
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'<path id="path1" transform="rotate(0,128,128) translate(59.1078108549118,59) scale(4.3125,4.3125) " fill="#FFFFFF" d="M12.12701,24.294998C12.75201,24.294998 13.258998,24.803009 13.258998,25.428009 13.258998,26.056 12.75201,26.563004 12.12701,26.563004 11.499019,26.563004 10.993007,26.056 10.993007,25.428009 10.993007,24.803009 11.499019,24.294998 12.12701,24.294998z M7.9750035,24.294998C8.6010101,24.294998 9.1090057,24.803009 9.1090057,25.428009 9.1090057,26.056 8.6010101,26.563004 7.9750035,26.563004 7.3480199,26.563004 6.8399942,26.056 6.8399942,25.428009 6.8399942,24.803009 7.3480199,24.294998 7.9750035,24.294998z M7.9750035,20.286011C8.6010101,20.286011 9.1090057,20.792999 9.1090057,21.419006 9.1090057,22.044006 8.6010101,22.552002 7.9750035,22.552002 7.3500035,22.552002 6.8420084,22.044006 6.8420084,21.419006 6.8420084,20.792999 7.3500035,20.286011 7.9750035,20.286011z M18.499994,19.317001C18.313013,19.317001,18.156,19.472,18.156,19.656006L18.156,27.01001C18.156,27.195007,18.313013,27.350006,18.499994,27.350006L29.521993,27.350006C29.707998,27.350006,29.865988,27.195007,29.865988,27.01001L29.865988,19.656006C29.865988,19.472,29.707998,19.317001,29.521993,19.317001z M17.243006,17.443008L30.778003,17.443008C31.425007,17.445007,31.947986,17.962006,31.950001,18.602997L31.950001,28.542007C31.947986,29.182999,31.425007,29.702011,30.778003,29.703003L25.654012,29.703003C25.511007,29.703003 25.399008,29.824997 25.413992,29.964996 25.430013,30.13501 25.452993,30.360001 25.477011,30.559998 25.506002,30.809998 25.727987,30.980011 25.976003,31.033997L27.756002,31.419006C27.907003,31.452011 28.015005,31.584 28.015005,31.738007 28.015005,31.883011 27.895986,32 27.74999,32L27.571005,32 20.450004,32 20.318016,32C20.171013,32 20.053001,31.883011 20.053001,31.738007 20.053001,31.585007 20.161003,31.452011 20.312004,31.419998L22.115989,31.033005C22.35601,30.98201 22.572014,30.815002 22.596,30.574005 22.616997,30.363007 22.636009,30.130997 22.648002,29.960007 22.658012,29.819 22.542015,29.70401 22.399986,29.70401L17.243006,29.703003C16.596002,29.702011,16.072992,29.182999,16.071008,28.542007L16.071008,18.602997C16.072992,17.962006,16.596002,17.445007,17.243006,17.443008z M7.9750035,16.133011C8.6020172,16.133011 9.1100128,16.641006 9.1100128,17.268005 9.1100128,17.893997 8.6020172,18.402008 7.9750035,18.402008 7.3489964,18.402008 6.8410013,17.893997 6.8410013,17.268005 6.8410013,16.641006 7.3489964,16.133011 7.9750035,16.133011z M24.027,13.762009C24.654014,13.762009 25.16201,14.270004 25.16201,14.895996 25.16201,15.522003 24.654014,16.029999 24.027,16.029999 23.400993,16.029999 22.892998,15.522003 22.892998,14.895996 22.892998,14.270004 23.400993,13.762009 24.027,13.762009z M24.027,9.6110077C24.653007,9.6110077 25.161003,10.119003 25.161003,10.74501 25.161003,11.37001 24.653007,11.878006 24.027,11.878006 23.402,11.878006 22.894005,11.37001 22.894005,10.74501 22.894005,10.119003 23.402,9.6110077 24.027,9.6110077z M24.027,5.6000061C24.654014,5.6000061 25.16201,6.1080017 25.16201,6.7350006 25.16201,7.3610077 24.654014,7.8690033 24.027,7.8690033 23.400993,7.8690033 22.892998,7.3610077 22.892998,6.7350006 22.892998,6.1080017 23.400993,5.6000061 24.027,5.6000061z M19.876001,5.6000061C20.503013,5.6000061 21.011009,6.1080017 21.011009,6.7350006 21.011009,7.3610077 20.503013,7.8690033 19.876001,7.8690033 19.249994,7.8690033 18.743006,7.3610077 18.743006,6.7350006 18.743006,6.1080017 19.249994,5.6000061 19.876001,5.6000061z M2.4290157,1.8740082C2.2420037,1.8740082,2.0850215,2.029007,2.0850215,2.2140045L2.0850215,9.5680084C2.0850215,9.753006,2.2420037,9.9069977,2.4290157,9.9069977L13.451014,9.9069977C13.637995,9.9069977,13.795008,9.753006,13.795008,9.5680084L13.795008,2.2140045C13.795008,2.029007,13.637995,1.8740082,13.451014,1.8740082z M1.1730042,0L14.706996,0C15.353999,0.0019989014,15.877009,0.51899719,15.878993,1.1600037L15.878993,11.100006C15.877009,11.740005,15.353999,12.26001,14.706996,12.26001L9.5830047,12.26001C9.4399994,12.26001 9.3290069,12.382004 9.3420074,12.52301 9.3600128,12.692001 9.3829925,12.917999 9.4060028,13.117004 9.4349945,13.367004 9.6570099,13.53801 9.9049957,13.591003L11.684994,13.975998C11.835994,14.009003 11.945003,14.141998 11.945003,14.294998 11.945003,14.440002 11.826015,14.557007 11.679012,14.557007L11.499996,14.557007 4.3789966,14.557007 4.2470081,14.557007C4.1000049,14.557007 3.9819935,14.440002 3.9819937,14.294998 3.9819935,14.141998 4.0899952,14.009003 4.2409961,13.977005L6.0450113,13.589996C6.2860086,13.539001 6.501005,13.373001 6.5249918,13.130997 6.5460184,12.921005 6.5650003,12.688004 6.5769937,12.516998 6.5870035,12.376999 6.4710062,12.262009 6.3290079,12.262009L1.1730042,12.26001C0.52499391,12.26001,0.0020143806,11.740005,0,11.100006L0,1.1600037C0.0020143806,0.51899719,0.52499391,0.0019989014,1.1730042,0z"/>' +
'</g>'
}
}
];
return svgSymbols;
}
//Initializes the HTML shapes for the symbol palette
public getHtmlShapes(): NodeModel[] {
let htmlSymbols: 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 htmlSymbols;
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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:
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { SymbolPaletteModule, ConnectorModel, PaletteModel } from '@syncfusion/ej2-angular-diagrams';
import { ExpandMode } from '@syncfusion/ej2-navigations';
@Component({
imports: [
SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<ejs-symbolpalette id="symbolpalette"width="100%" height="100%" [expandMode]="expandMode" [palettes]="palettes" [symbolHeight]=80 [symbolWidth]=80>
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public expandMode?: ExpandMode;
public palettes?: PaletteModel[];
public 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;
}
ngOnInit(): void {
//Expands only one palette at a time
this.expandMode = 'Single'
this.palettes = [
{
id: 'connectors',
expanded: true,
symbols: this.getConnectors(),
title: 'Connectors',
iconCss: 'e-ddb-icons e-connector'
}
];
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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:
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramModule, SymbolPaletteModule, PaletteModel, NodeModel } from '@syncfusion/ej2-angular-diagrams'
import { ExpandMode } from '@syncfusion/ej2-navigations';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<ejs-symbolpalette id="symbolpalette" width="100%" height="100%" [palettes]="palettes" [expandMode]="expandMode">
</ejs-symbolpalette>
<ejs-diagram id="diagram" width="1000px" height="500px">
</ejs-diagram>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public expandMode: ExpandMode = 'Single';
getGroupNodes(): NodeModel[] {
let shapes: 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 shapes;
}
public palettes: PaletteModel[] = [
{
id: 'palette1',
title: 'Group Nodes',
symbols: this.getGroupNodes(),
expanded: true,
}
];
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { DiagramModule, randomId, SymbolPaletteModule } from '@syncfusion/ej2-angular-diagrams'
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { SymbolPaletteComponent, SymbolPalette, NodeModel, PaletteModel } from '@syncfusion/ej2-angular-diagrams';
import { ExpandMode } from '@syncfusion/ej2-navigations';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<button id='addBasicShape' (click)="addBasicShape()">addBasicShape</button>
<button id='addFlowShape' (click)="addFlowShape()">addFlowShape</button>
<ejs-symbolpalette #symbolpalette id="symbolpalette"width="100%" height="100%" [expandMode]="expandMode" [palettes]="palettes" [symbolHeight]=50 [symbolWidth]=50>
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
@ViewChild("symbolpalette")
public symbolPalette?: SymbolPaletteComponent;
public expandMode?: ExpandMode;
public palettes?: PaletteModel[];
public 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;
};
public 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;
};
ngOnInit(): void {
this.expandMode = 'Multiple'
this.palettes = [
{
id: 'basic',
expanded: true,
symbols: this.getBasicShapes(),
title: 'Basic Shapes',
},
{
id: 'flow',
expanded: true,
symbols: this.getFlowShapes(),
title: 'Flow Shapes',
},
];
}
addBasicShape() {
let 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
*/
(this.symbolPalette as SymbolPaletteComponent).addPaletteItem('basic', node);
}
addFlowShape() {
let 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
*/
(this.symbolPalette as SymbolPaletteComponent).addPaletteItem('flow', node);
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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.
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { SymbolPaletteComponent, DiagramModule, SymbolPaletteModule, NodeModel, PaletteModel } from '@syncfusion/ej2-angular-diagrams';
import { ExpandMode } from '@syncfusion/ej2-navigations';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<button id='rmvBasicShape' (click)="removeBasicShape()">removeBasicShape</button>
<button id='rmvFlowShape' (click)="removeFlowShape()">removeFlowShape</button>
<ejs-symbolpalette #symbolpalette id="symbolpalette"width="100%" height="100%" [expandMode]="expandMode" [palettes]="palettes" [symbolHeight]=50 [symbolWidth]=50>
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
@ViewChild("symbolpalette")
public symbolPalette?: SymbolPaletteComponent
public expandMode?: ExpandMode;
public palettes?: PaletteModel[];
public 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;
};
public getFlowShapes(): NodeModel[] {
let flowShapes: NodeModel[] = [
{
id: 'Decision',
shape: { type: 'Flow', shape: 'Decision' },
style: { strokeWidth: 2 },
},
{
id: 'Document',
shape: { type: 'Flow', shape: 'Document' },
style: { strokeWidth: 2 },
},
];
return flowShapes;
};
ngOnInit(): void {
this.expandMode = 'Multiple'
this.palettes = [
{
id: 'basic',
expanded: true,
symbols: this.getBasicShapes(),
title: 'Basic Shapes',
},
{
id: 'flow',
expanded: true,
symbols: this.getFlowShapes(),
title: 'Flow Shapes',
},
];
}
removeBasicShape() {
/**
* parameter 1 - The ID of the palette where the shape to be removed.
* parameter 2 - ID of the shape to be removed
*/
let id = ((this.symbolPalette as SymbolPaletteComponent).palettes[0] as any).symbols[0]?.id;
(this.symbolPalette as SymbolPaletteComponent).removePaletteItem('basic', id);
}
removeFlowShape() {
let id = ((this.symbolPalette as SymbolPaletteComponent).palettes[1] as any).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
*/
(this.symbolPalette as SymbolPaletteComponent).removePaletteItem('flow', id);
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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.
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramModule, SymbolPaletteModule, NodeModel, ConnectorModel, PaletteModel } from '@syncfusion/ej2-angular-diagrams';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<ejs-symbolpalette id="symbolpalette" [palettes]="palettes" [getNodeDefaults]="getNodeDefaults" [getConnectorDefaults]="getConnectorDefaults">
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public palettes?: PaletteModel[];
public 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;
}
public 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
getNodeDefaults(node: NodeModel): NodeModel {
(node as any).style.fill = 'yellow';
return node;
}
//Returns the default properties of connector
getConnectorDefaults(connector: ConnectorModel): ConnectorModel {
(connector as any).targetDecorator.shape = 'DoubleArrow';
return connector;
}
ngOnInit(): void {
this.palettes = [{
id: 'flow',
symbols: this.getFlowShapes(),
title: 'Flow Shapes',
iconCss: 'e-ddb-icons e-flow'
},
{
id: 'connectors',
symbols: this.getConnectors(),
title: 'Connectors',
iconCss: 'e-ddb-icons e-connector'
}];
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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 addPalettes method 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.
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramModule, SymbolPaletteModule, SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel, randomId } from '@syncfusion/ej2-angular-diagrams';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<button id='addPalette' (click)="addPalette()">Add Palette</button>
<ejs-symbolpalette #symbolpalette id="symbolpalette" [palettes]="palettes" [enablePersistence]="enablePersistence" >`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
@ViewChild("symbolpalette")
public symbolPalette?: SymbolPaletteComponent;
public palettes: PaletteModel[] = [{
id: 'flow',
symbols: this.getFlowShapes(),
title: 'Flow Shapes',
},
{
id: 'connectors',
symbols: this.getConnectors(),
title: 'Connectors',
}];
public enablePersistence: boolean = false;
public 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;
}
public 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;
}
addPalette() {
let newPaletteShapes: NodeModel[] = [
{
id: 'rectangle' + randomId(),
shape: { type: 'Basic', shape: 'Rectangle' },
},
{
id: 'plus' + randomId(),
shape: { type: 'Basic', shape: 'Plus' },
},
];
let newPalette: PaletteModel[] = [
{
id: 'basic' + randomId(),
symbols: newPaletteShapes,
title: 'New Shapes',
},
];
/**
* parameter - The new palette to be added in symbol palette.
*/
(this.symbolPalette as SymbolPaletteComponent).addPalettes(newPalette);
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));Remove palettes at runtime
You can remove palettes from the symbol palette at runtime. There are two ways to do this:
- Use the
removePalettemethod to remove a single palette by its ID. - Use the
removePalettesmethod 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.
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramModule, SymbolPaletteModule, SymbolPaletteComponent, NodeModel, ConnectorModel, PaletteModel } from '@syncfusion/ej2-angular-diagrams';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<button id='removePalette' (click)="removePalette()">removePalette</button>
<button id='removePalettes' (click)="removePalettes()">removePalettes</button>
<ejs-symbolpalette #symbolpalette id="symbolpalette" [palettes]="palettes">`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
@ViewChild("symbolpalette")
public symbolPalette?: SymbolPaletteComponent;
public palettes: PaletteModel[] = [{
id: 'flow',
symbols: this.getFlowShapes(),
title: 'Flow Shapes',
},
{
id: 'basic',
symbols: this.getBasicShapes(),
title: 'Basic Shapes',
},
{
id: 'connectors',
symbols: this.getConnectors(),
title: 'Connectors',
},
];
//Initialize the flowshapes for the symbol palette
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 basic shapes for the symbol palette
getBasicShapes(): NodeModel[] {
let nodes: NodeModel[] = [
{
id: 'rectangle',
shape: {
type: 'Basic',
shape: 'Rectangle',
},
},
{
id: 'plus',
shape: {
type: 'Basic',
shape: 'Plus',
},
},
{
id: 'triangle',
shape: {
type: 'Basic',
shape: 'RightTriangle',
},
},
];
return nodes;
}
//Initialize the connectors for the symbol palette
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;
}
removePalette() {
/**
* parameter - The ID of palette to be removed in symbol palette.
*/
(this.symbolPalette as SymbolPaletteComponent).removePalette('basic');
(this.symbolPalette as SymbolPaletteComponent).refresh();
};
removePalettes() {
let palettes: string[] = ['flow', 'connectors'];
/**
* parameter - The ID array of palettes to be removed in symbol palette.
*/
(this.symbolPalette as SymbolPaletteComponent).removePalettes(palettes);
(this.symbolPalette as SymbolPaletteComponent).refresh();
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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.
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Component, OnInit, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramModule, SymbolPaletteModule, NodeModel, PaletteModel, SymbolInfo } from '@syncfusion/ej2-angular-diagrams';
import { ExpandMode } from '@syncfusion/ej2-navigations';
@Component({
imports: [
DiagramModule, SymbolPaletteModule
],
providers: [],
standalone: true,
selector: "app-container",
template: `<ejs-symbolpalette id="symbolpalette"width="100%" height="700px" [symbolHeight]=80 [symbolWidth]=80 [expandMode]="expandMode" [palettes]="palettes" [getSymbolInfo]="getSymbolInfo">
</ejs-symbolpalette>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public expandMode: ExpandMode = 'Multiple';
public palettes: PaletteModel[] = [{
id: 'basic',
expanded: true,
symbols: this.getBasicShapes(),
title: 'Basic Shapes',
iconCss: 'e-ddb-icons e-basic'
}];
public 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;
};
public getSymbolInfo(): 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
};
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));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();