Connectors in Angular Diagram component

4 Apr 202324 minutes to read

Connectors are objects used to create link between two points, nodes or ports to represent the relationships between them.

Create connector

Connector can be created by defining the source and target point of the connector. The path to be drawn can be defined with a collection of segments. To explore the properties of a connector, refer to Connector Properties.

Add connectors through connectors collection

The sourcePoint and targetPoint properties of connector allow you to define the end points of a connector.

The following code example illustrates how to add a connector through connector collection.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Straight' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Add connector at runtime

Connectors can be added at runtime by using public method, diagram.add and can be removed at runtime by using public method, diagram.remove.

The following code example illustrates how to add connector at runtime.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults' (created)='created($event)'>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public connectors: ConnectorModel[] = [{
        id: "connector1",
        style: {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        },
        targetDecorator: {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        },
        sourcePoint: {
            x: 100,
            y: 100
        },
        targetPoint: {
            x: 200,
            y: 200
        }
    }]
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
    public created(args: Object): void {
        // Adds to the Diagram
        this.diagram.add(this.connectors);
        // Remove from the diagram
        this.diagram.remove(this.connectors);
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Connectors from palette

Connectors can be predefined and added to the symbol palette. You can drop those connectors into the diagram, when required.

For more information about adding connectors from symbol palette, refer to Symbol Palette.

Draw connectors

Connectors can be interactively drawn by clicking and dragging on the diagram surface by using drawingObject.

For more information about drawing connectors, refer to Draw Connectors.

Update connector at runtime

Various connector properties such as sourcePoint, targetPoint, style, sourcePortID, targetPortID, etc., can be updated at the runtime.

The following code example illustrates how to update a connector’s source point, target point, styles properties at runtime.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'  (created)='created($event)'>
        <e-connectors>
            <e-connector id='connector' type='Straight' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
    public created(args: Object): void {
        // Update the connector properties at the run time
        this.diagram.connectors[0].style.strokeColor = '#6BA5D7';
        this.diagram.connectors[0].style.fill = '#6BA5D7';
        this.diagram.connectors[0].style.strokeWidth = 2;
        this.diagram.connectors[0].targetDecorator.style.fill = '#6BA5D7';
        this.diagram.connectors[0].targetDecorator.style.strokeColor = '#6BA5D7';
        this.diagram.connectors[0].sourcePoint.x = 150;
        this.diagram.connectors[0].targetPoint.x = 150;
        this.diagram.dataBind();
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Connect nodes

The sourceID and targetID properties allow to define the nodes to be connected.
The connectorSpacing property allows you to define the distance between the source node and the connector. It is the minimum distance the connector will re-rout or the new segment will create.

The following code example illustrates how to connect two nodes.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getNodeDefaults] ='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
        <e-nodes>
            <e-node id='node1' [offsetX]=150 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Node1">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='node2' [offsetX]=350 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Custom Template">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector' type='Orthogonal' sourceID='node1' targetID='node2' connectorSpacing='connectorSpacing'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public connectorSpacing: number;
    ngOnInit(): void {
        this.connectorSpacing = 7;
    }
    public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

When you remove NodeConstraints InConnect from Default, the node accepts only an outgoing connection to dock in it. Similarly, when you remove NodeConstraints OutConnect from Default, the node accepts only an incoming connection to dock in it.
When you remove both InConnect and OutConnect NodeConstraints from Default, the node restricts connector to establish connection in it.

The following code illustrates how to disable InConnect constraints.

import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { NodeConstraints } from "@syncfusion/ej2-angular-diagrams";

@Component({
    selector: "app-container",
    template: `<ejs-diagram id="diagram" width="100%" height="580px">
        <e-nodes>
            <e-node id='node1' [height]=60 [width]=100 [offsetX]=300 [offsetY]=80 [constraints]='nodeConstraints'>
            </e-node>
        </e-nodes>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public nodeConstraints: NodeConstraints;
    ngOnInit(): void {
        this.nodeConstraints = NodeConstraints.Default & ~NodeConstraints.InConnect;
    }
}

Connections with ports

The sourcePortID and targetPortID properties allow to create connections between some specific points of source/target nodes.

The following code example illustrates how to create port to port connections.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, PointPortModel, PortVisibility } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getNodeDefaults] ='getNodeDefaults'>
        <e-nodes>
            <e-node id='node1' [offsetX]=150 [offsetY]=150 [ports]='port1'>
                <e-node-annotations>
                    <e-node-annotation content="Node1">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='node2' [offsetX]=350 [offsetY]=150 [ports]='port2'>
                <e-node-annotations>
                    <e-node-annotation content="Custom Template">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector' type='Straight' sourceID='node1' sourcePortID='port1' targetID='node2' targetPortID='port2'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public port1: PointPortModel[] = [{
        id: 'port1',
        offset: {
            x: 0,
            y: 0.5
        },
        visibility: PortVisibility.Visible
    }]
    public port2: PointPortModel[] = [
        {
            id: 'port2',
            offset: {
                x: 1,
                y: 0.5
            },
            visibility: PortVisibility.Visible
        },
        {
            id: 'port3',
            offset: {
                x: 0.5,
                y: 0
            },
            visibility: PortVisibility.Visible
        }
    ]
    public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Similarly, the sourcePortID or targetPortID can be changed at the runtime by changing the port sourcePortID or targetPortID.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, PointPortModel ,PortVisibility} from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getNodeDefaults] ='getNodeDefaults'  (created)='created($event)'>
        <e-nodes>
            <e-node id='node1' [offsetX]=150 [offsetY]=150 [ports]='port1'>
                <e-node-annotations>
                    <e-node-annotation content="Node1">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='node2' [offsetX]=350 [offsetY]=150 [ports]='port2'>
                <e-node-annotations>
                    <e-node-annotation content="Custom Template">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector' type='Straight' sourceID='node1' sourcePortID='port1' targetID='node2' targetPortID='port2'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public port1: PointPortModel[] = [{
        id: 'port1',
        offset: {
            x: 0,
            y: 0.5
        },
        visibility: PortVisibility.Visible
    }]
    public port2: PointPortModel[] = [
        {
            id: 'port2',
            offset: {
                x: 1,
                y: 0.5
            },
            visibility: PortVisibility.Visible
        },
        {
            id: 'port3',
            offset: {
                x: 0.5,
                y: 0
            },
            visibility: PortVisibility.Visible
        }
    ]
    public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }

    public created(args: Object): void {
        // Update the target portID at the run time
        this.diagram.connectors[0].targetPortID = 'port3';
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

When you set PortConstraints to InConnect, the port accepts only an incoming connection to dock in it. Similarly, when you set PortConstraints to OutConnect, the port accepts only an outgoing connection to dock in it.
When you set PortConstraints to None, the port restricts connector to establish connection in it.

import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { PointPortModel, PortConstraints } from "@syncfusion/ej2-angular-diagrams";

@Component({
    selector: "app-container",
    template: `<ejs-diagram id="diagram" width="100%" height="580px">
        <e-nodes>
            <e-node id='node1' [height]=60 [width]=100 [offsetX]=300 [offsetY]=80 [ports]='port1'>
            </e-node>
        </e-nodes>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public port1: PointPortModel[];
    ngOnInit(): void {
        this.port1 = [{
            id: 'port1',
            shape: 'Circle',
            offset: { x: 0, y: 0.5 },
            text: 'In - 1',
            constraints: PortConstraints.InConnect
        }];
    }
}

Segments

The path of the connector is defined with a collection of segments. There are three types of segments.

Straight

To create a straight line, specify the type of the segment as straight and add a straight segment to segments collection and need to specify type for the connector. The following code example illustrates how to create a default straight segment.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, StraightSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Straight' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: StraightSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.segments = [{
            // Defines the segment type of the connector
            type: 'Straight'
        }]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

The point property of straight segment allows you to define the end point of it. The following code example illustrates how to define the end point of a straight segment.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, StraightSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Straight' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: StraightSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.segments = [{
            // Defines the segment type of the connector
            type: 'Straight',
            point: { x: 100, y: 150 }
        }]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Orthogonal

Orthogonal segments is used to create segments that are perpendicular to each other.

Set the segment type as orthogonal to create a default orthogonal segment and need to specify type. The following code example illustrates how to create a default orthogonal segment.

If we set the segments for the connector in the diagram, the connector’s first segment is rendered based on the given segment by default. Then the remaining segments are considered as single segment. Please refer the below screenshot.
connector_segments
If no segments are defined for the connector means, then the whole connector is considered as a single segment. We adopted this method for rendering the connector and its segments.

Multiple segments can be defined one after another. To create a connector with multiple segments, define and add the segments to connector.segments collection. The following code example illustrates how to create a connector with multiple segments.

The property maxSegmentThumb is used to limit the segment thumb in the connector.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel,ConnectorEditing, OrthogonalSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';
import {ConnectorConstraints} from '@syncfusion/ej2-diagrams';
Diagram.Inject(ConnectorEditing);
@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Orthogonal' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' maxSegmentThumb='maxSegmentThumb' [constraints] ='constraints' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public maxSegmentThumb: number;
    public constraints : ConnectorConstraints ;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.maxSegmentThumb = 3;
        this.constraints =ConnectorConstraints.Default & ~ConnectorConstraints.DragSegmentThumb;
        this.segments = [{
            // Defines the segment type of the connector
            type: 'Orthogonal'
        }]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

The length and direction properties allow to define the flow and length of segment. The following code example illustrates how to create customized orthogonal segments.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, OrthogonalSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Orthogonal' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.segments = [
            {
                type: 'Orthogonal',
                direction: 'Bottom',
                length: 150
            },
            {
                type: 'Orthogonal',
                direction: 'Right',
                length: 150
            }
        ]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Note: You need to mention the segment type as same as what you mentioned in connector type. There should be no contradiction between connector type and segment type.

Avoid overlapping

Orthogonal segments are automatically re-routed, in order to avoid overlapping with the source and target nodes. The following preview illustrates how orthogonal segments are re-routed.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, OrthogonalSegmentModel, PointModel, PortVisibility } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getNodeDefaults] ='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
        <e-nodes>
            <e-node id='node1' [offsetX]=150 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Node1">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='node2' [offsetX]=350 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Custom Template">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector' type='Straight' sourceID='node1' sourcrPortID='port1' targetID='node2' targetPortID='port2'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public port1: PointPortModel[] = [{
        id: 'port1',
        offset: {
            x: 0,
            y: 0.5
        },
        visibility: PortVisibility.Visible
    }]
    public port2: PointPortModel[] = [
        {
            id: 'port2',
            offset: {
                x: 0.5,
                y: 0
            },
            visibility: PortVisibility.Visible
        }
    ]
    public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

How to customize Orthogonal Segment Thumb Shape

The orthogonal connector has a number of segments in between the source and the target point. The segments are rendered with the default shape rhombus. Now, the option has been provided to change the segment thumb shape using the segmentThumbShape property. The predefined shapes provided are as follows:

Rhombus
Square
Rectangle
Ellipse
Arrow
Diamond
OpenArrow
Circle
Fletch
OpenFetch
IndentedArrow
OutdentedArrow
DoubleArrow

You can customize the style of the thumb shape by overriding the class e-orthogonal-thumb.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel,ConnectorEditing, ConnectorModel,ConnectorConstraints, OrthogonalSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';
Diagram.Inject(ConnectorEditing);

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="900px" height="500px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector2' type='Orthogonal' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 250, y: 250 };
        this.targetPoint = { x: 350, y: 350 };
        this.segments = [
            {
            type: 'Orthogonal',
            // Defines the direction for the segment lines
            direction: "Right",
            // Defines the length for the segment lines
            length: 70
            },
            {
            type: 'Orthogonal',
            direction: "Bottom",
            length: 20
            }
        ]
    }
    public getConnectorDefaults(connector: ConnectorModel): ConnectorModel {
        connector.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        connector.constraints = ConnectorConstraints.Default | ConnectorConstraints.DragSegmentThumb;
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Segment Thumb Shape

Use the following CSS to customize the segment thumb shape.

.e-orthogonal-thumb {
    fill: rgb(126, 190, 219);
    stroke:  #24039e;
    stroke-width: 3px;
  }

Bezier

Bezier segments are used to create curve segments and the curves are configurable either with the control points or with vectors.

To create a bezier segment, the segment.type is set as bezier and need to specify type for the connector. The following code example illustrates how to create a default bezier segment.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, BezierSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Bezier' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.segments = [
            {
                type: 'Bezier'
            }
        ]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

The point1 and point2 properties of bezier segment enable you to set the control points. The following code example illustrates how to configure the bezier segments with control points.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, BezierSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Bezier' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 200 };
        this.targetPoint = { x: 200, y: 100 };
        this.segments = [{
            type: 'Bezier',
            // First control point: an absolute position from the page origin
            point1: {
                x: 100,
                y: 100
            },
            // Second control point: an absolute position from the page origin
            point2: {
                x: 200,
                y: 200
            }
        }]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

The vector1 and vector2 properties of bezier segment enable you to define the vectors. The following code illustrates how to configure a bezier curve with vectors.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, BezierSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Bezier' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [segments]='segments'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.segments = [{
            type: 'Bezier',
            // Length and angle between the source point and the first control point
            vector1: {
                distance: 100,
                angle: 90
            },
            // Length and angle between the target point and the second control point
            vector2: {
                distance: 45,
                angle: 270
            }
        }]
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Avoid overlapping with bezier

By default, when there are no segments defined for a bezier connector, the bezier segments will be created automatically and routed in such a way that avoids overlapping with the source and target nodes.

import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent,Diagram,NodeModel,ConnectorModel,ConnectorEditing,ConnectorConstraints } from '@syncfusion/ej2-angular-diagrams';
Diagram.Inject(ConnectorEditing);
@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="600px" [getNodeDefaults]='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
         <e-nodes>
            <e-node id=''Start'' [offsetX]=250 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Start">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='End' [offsetX]=450 [offsetY]=200>
                <e-node-annotations>
                    <e-node-annotation content="End">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector1' type='Bezier' sourceID='Start' targetID='End'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
      encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
        public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.shape = { type: 'Basic', shape: 'Rectangle' };
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(connector: ConnectorModel): ConnectorModel {
     connector.style: {
        strokeColor: '#6BA5D7',
        fill: '#6BA5D7',
        strokeWidth: 2
    },
    connector.targetDecorator: { shape: 'None' },
    connector.constraints = ConnectorConstraints.Default | ConnectorConstraints.DragSegmentThumb;
    }
}

Also, the intermediate point of two adjacent bezier segments can be edited interactively based on the bezierSettings.segmentEditOrientation property of the connector class.

How to interact with the bezier segments efficiently

While interacting with multiple bezier segments, maintain their control points at the same distance and angle by using the bezierSettings.smoothness property of the connector class.

BezierSmoothness value	Description
SymmetricDistance	Both control points of adjacent segments will be at the same distance when any one of them is editing.
SymmetricAngle	Both control points of adjacent segments will be at the same angle when any one of them is editing.
Default	Both control points of adjacent segments will be at the same angle and same distance when any one of them is editing.
None	Segment’s control points are interacted independently from each other.

import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent,Diagram,NodeModel,ConnectorModel,ConnectorEditing,ConnectorConstraints } from '@syncfusion/ej2-angular-diagrams';
Diagram.Inject(ConnectorEditing);
@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="600px" [getNodeDefaults]='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
         <e-nodes>
            <e-node id=''Start'' [offsetX]=250 [offsetY]=150 [ports]='StartPort'>
                <e-node-annotations>
                    <e-node-annotation content="Start">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='End' [offsetX]=450 [offsetY]=200 [ports]='EndPort'>
                <e-node-annotations>
                    <e-node-annotation content="End">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector1' type='Bezier' sourceID='Start' targetID='End' sourcePortID='StartPort'targetPortID='EndPort' [bezierSettings]='bezierSettings'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
      encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public StartPort:PointPortModel[];
    public EndPort:PointPortModel[];
    public bezierSettings;
     ngOnInit(): void {
        this.StartPort = [{
            id: 'StartPort',
            visibility: PortVisibility.Visible,
            shape: 'Circle',
            offset: { x: 1, y: 0.5 },
            style: { strokeColor: '#366F8C', fill: '#366F8C' }
        }];
        this.EndPort = [{
            id: 'EndPort',
            visibility: PortVisibility.Visible,
            shape: 'Circle',
            offset: { x: 0, y: 0.5 },
            style: { strokeColor: '#366F8C', fill: '#366F8C' }
        }];
        this.bezierSettings = { smoothness: BezierSmoothness.SymmetricAngle };
    }
        public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.shape = { type: 'Basic', shape: 'Rectangle' };
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(connector: ConnectorModel): ConnectorModel {
     connector.style: {
        strokeColor: '#6BA5D7',
        fill: '#6BA5D7',
        strokeWidth: 2
    },
    connector.targetDecorator: { shape: 'None' },
    connector.constraints = ConnectorConstraints.Default | ConnectorConstraints.DragSegmentThumb;
    }
}

Also, the visibility of control points can be controlled using the bezierSettings.controlPointsVisibility property of the connector class.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel,ConnectorEditing, ConnectorConstraints,BezierSegmentModel, PointPortModel, ControlPointsVisibility, PortVisibility } from '@syncfusion/ej2-angular-diagrams';
Diagram.Inject(ConnectorEditing);
@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="600px" [getNodeDefaults]='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
        <e-nodes>
            <e-node id='Start' [offsetX]=250 [offsetY]=150 [ports]='StartPort'>
                <e-node-annotations>
                    <e-node-annotation content="Start">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='End' [offsetX]=450 [offsetY]=200 [ports]='EndPort'>
                <e-node-annotations>
                    <e-node-annotation content="End">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector1' type='Bezier' sourceID='Start' targetID='End'  sourcePortID='StartPort' targetPortID='EndPort' bezierSettings='bezierSettings'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
      encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public StartPort:PointPortModel[];
    public EndPort:PointPortModel[];
    public bezierSettings;
      ngOnInit(): void {
        this.StartPort = [{
            id: 'StartPort',
            visibility: PortVisibility.Visible,
            shape: 'Circle',
            offset: { x: 1, y: 0.5 },
            style: { strokeColor: '#366F8C', fill: '#366F8C' }
        }];
        this.EndPort = [{
            id: 'EndPort',
            visibility: PortVisibility.Visible,
            shape: 'Circle',
            offset: { x: 0, y: 0.5 },
            style: { strokeColor: '#366F8C', fill: '#366F8C' }
        }];
        this.bezierSettings = { controlPointsVisibility: ControlPointsVisibility.Source | ControlPointsVisibility.Target };
    }
        public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.shape = { type: 'Basic', shape: 'Rectangle' };
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(connector: ConnectorModel): ConnectorModel {
     connector.style = {
        strokeColor: '#6BA5D7',
        fill: '#6BA5D7',
        strokeWidth: 2
    },
    connector.targetDecorator: { shape: 'None' },
    connector.constraints = ConnectorConstraints.Default | ConnectorConstraints.DragSegmentThumb;
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Decorator

Starting and ending points of a connector can be decorated with some customizable shapes like arrows, circles, diamond, or path. The connection end points can be decorated with the sourceDecorator and targetDecorator properties of the connector.
The shape property of sourceDecorator allows to define the shape of the decorators. Similarly, the shape property of targetDecorator allows to define the shape of the decorators.
To create custom shape for source decorator, use pathData property. Similarly, to create custom shape for target decorator, use pathData property.

The following code example illustrates how to create decorators of various shapes.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, DecoratorModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
                <e-connector id='connector' type='Bezier' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint' [sourceDecorator]='sourceDecorator' [targetDecorator]='targetDecorator'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public sourceDecorator: DecoratorModel;
    public targetDecorator: DecoratorModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.sourceDecorator = {
            shape: 'Circle',
            // Defines the style for the sourceDecorator
            style: {
                // Defines the strokeWidth for the sourceDecorator
                strokeWidth: 3,
                // Defines the strokeColor for the sourceDecorator
                strokeColor: 'red'
            },

        }
        // Decorator shape - Diamond
        this.targetDecorator = {
            // Defines the custom shape for the connector's target decorator
            shape: 'Custom',
            //Defines the  path for the connector's target decorator
            pathData: 'M80.5,12.5 C80.5,19.127417 62.59139,24.5 40.5,24.5 C18.40861,24.5 0.5,19.127417 0.5,12.5' +
                'C0.5,5.872583 18.40861,0.5 40.5,0.5 C62.59139,0.5 80.5,5.872583 80.5,12.5 z'
            //defines the style for the target decorator
            style: {
                // Defines the strokeWidth for the targetDecorator
                strokeWidth: 3,
                // Defines the strokeColor for the sourceDecorator
                strokeColor: 'green',
                // Defines the opacity for the sourceDecorator
                opacity: .8
            },
        }
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Padding

Padding is used to leave the space between the Connector’s end point and the object to where it is connected.

The sourcePadding property of connector defines space between the source point and the source node of the connector.
The targetPadding property of connector defines space between the end point and the target node of the connector.

The following code example illustrates how to leave space between the connection end points and source and target nodes.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getNodeDefaults] ='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
        <e-nodes>
            <e-node id='node1' [offsetX]=150 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Node1">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='node2' [offsetX]=350 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Custom Template">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector' type='Straight' sourceID='node1' targetID='node2'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        // Set Source Padding value
        obj.sourcePadding = 20
        // Set Target Padding value
        obj.targetPadding = 20
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Flip

The diagram Provides support to flip the connector. The flip is performed to give the mirrored image of the original element.

The flip types are as follows:

HorizontalFlip - Horizontal is used to interchange the connector source and target x points.
VerticalFlip - Vertical is used to interchange the connector source and target y points.
Both - Both is used to interchange the source point as target point and target point as source point

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, DecoratorModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
                <e-connector id='connector' type='Orthogonal' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public segments: OrthogonalSegmentModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        // Flip the connector in horizontal direction
        obj.flip = "Horizontal"
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Note: The flip is not applicable when the connectors connect in nodes.

Bridging

Line bridging creates a bridge for lines to smartly cross over the other lines, at points of intersection. By default, bridgeDirection is set to top. Depending upon the direction given bridging direction appears.

Bridging can be enabled/disabled either with the connector.constraints or diagram.constraints. The following code example illustrates how to enable line bridging.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, DecoratorModel, PointModel, DiagramConstraints } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults' [constraints]='constraints'>
        <e-connectors>
            <e-connector id='connector1' type='Straight' [sourcePoint]='sourcePoint1' [targetPoint]='targetPoint1'></e-connector>
            <e-connector id='connector2' type='Straight' [sourcePoint]='sourcePoint2' [targetPoint]='targetPoint2'></e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint1: PointModel;
    public targetPoint1: PointModel;
    public sourcePoint2: PointModel;
    public targetPoint2: PointModel;
    public sourceDecorator: DecoratorModel;
    public targetDecorator: DecoratorModel;
    public constraints: DiagramConstraints;
    ngOnInit(): void {
        this.sourcePoint1 = { x: 100, y: 100 };
        this.targetPoint1 = { x: 200, y: 200 };
        this.sourcePoint2 = { x: 200, y: 100 };
        this.targetPoint2 = { x: 100, y: 200 };
        this.constraints = DiagramConstraints.Default | DiagramConstraints.Bridging;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, ConnectorBridgingService } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ConnectorBridgingService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Note: You need to inject connector bridging module into the diagram.

The bridgeSpace property of connectors can be used to define the width for line bridging.

Limitation: Bezier segments do not support bridging.

Corner radius

Corner radius allows to create connectors with rounded corners. The radius of the rounded corner is set with the cornerRadius property.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, NodeModel, ConnectorModel, OrthogonalSegmentModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getNodeDefaults] ='getNodeDefaults' [getConnectorDefaults] ='getConnectorDefaults'>
        <e-nodes>
            <e-node id='node1' [offsetX]=150 [offsetY]=150>
                <e-node-annotations>
                    <e-node-annotation content="Node1">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
            <e-node id='node2' [offsetX]=350 [offsetY]=350>
                <e-node-annotations>
                    <e-node-annotation content="Custom Template">
                    </e-node-annotation>
                </e-node-annotations>
            </e-node>
        </e-nodes>
        <e-connectors>
            <e-connector id='connector' type='Straight' sourceID='node1' sourcrPortID='port1' targetID='node2' targetPortID='port2' [cornerRadius]='cornerRadius'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public cornerRadius: number;
    ngOnInit(): void {
        this.cornerRadius = 10;
    }
    public getNodeDefaults(node: NodeModel): NodeModel {
        node.height = 100;
        node.width = 100;
        node.style.fill = "#6BA5D7";
        node.style.strokeColor = "White";
        return node;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Appearance

The connector’s strokeWidth, strokeColor, strokeDashArray, and opacity properties are used to customize the appearance of the connector segments.
The visible property of the connector enables or disables the visibility of connector.
Default values for all the connectors can be set using the getConnectorDefaults properties. For example, if all connectors have the same type or having the same property then such properties can be moved into getConnectorDefaults.

Segment appearance

The following code example illustrates how to customize the segment appearance.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, OrthogonalSegmentModel, PointModel, StrokeStyleModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector' type='Straight' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    public style: StrokeStyleModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.style = {
            // Stroke color
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            // Stroke width of the line
            strokeWidth: 2,
            // Line style
            strokeDashArray: '2,2'
        }
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Decorator appearance

The source decorator’s strokeColor, strokeWidth, and strokeDashArray properties are used to customize the color, width, and appearance of the decorator.
To set the border stroke color, stroke width, and stroke dash array for the target decorator, use strokeColor, strokeWidth, and strokeDashArray.
To set the size for source and target decorator, use width and height property.

The following code example illustrates how to customize the appearance of the decorator.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, DecoratorModel, PointModel } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
                <e-connector id='connector' type='Bezier' [sourcePoint]='sourcePoint' [targetPoint]='targetPoint'[targetDecorator]='targetDecorator'>
            </e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint: PointModel;
    public targetPoint: PointModel;
    ngOnInit(): void {
        this.sourcePoint = { x: 100, y: 100 };
        this.targetPoint = { x: 200, y: 200 };
        this.targetDecorator = {
            style: {
                // Fill color of the decorator
                fill: '#6BA5D7',
                // Stroke color of the decorator
                strokeColor: '#6BA5D7'
            }
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Interaction

Diagram allows to edit the connectors at runtime. To edit the connector segments at runtime, refer to Connection Editing.

Automatic line routing

Diagram provides additional flexibility to re-route the diagram connectors. A connector will frequently re-route itself when a shape moves next to it. The following screenshot illustrates how the connector automatically re-routes the segments.

1.Dependency LineRouting module should be injected to the application as the following code snippet.

import {  LineRouting, Diagram } from '@syncfusion/ej2-diagrams';
/**
 * Injecting the automatic line routing module.
 */
Diagram.Inject(LineRouting);

2.Now, the line routing constraints must be included to the default diagram constraints to enable automatic line routing support like below.

/**
 *  Initialize the Diagram
 */
  <ejs-diagram #diagram [constraints]='constraints'>

  // Enable line routing constraints.
 public constraints: DiagramConstraints = DiagramConstraints.Default | DiagramConstraints.LineRouting;

3.The following code block shows how to create the diagram with specifying nodes, connectors, constraints, and necessary modules for line routing.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { Diagram, DiagramComponent, NodeModel, ConnectorModel } from '@syncfusion/ej2-angular-diagrams';
import { NodeConstraints, LineRouting, DiagramConstraints, ConnectorConstraints, SnapConstraints, SnapSettingsModel } from '@syncfusion/ej2-diagrams';
Diagram.Inject(LineRouting);

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="645px" [nodes]='nodes' [connectors]='connectors' [getNodeDefaults]='getNodeDefaults' [constraints]='constraints'>`, encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild('diagram')
  public diagram: DiagramComponent;
  public constraints: DiagramConstraints = DiagramConstraints.Default | DiagramConstraints.LineRouting;
  public nodes: NodeModel[] = [
  { id: 'shape1', offsetX: 100, offsetY: 100, width: 120, height: 50 },
  { id: 'shape2', offsetX: 300, offsetY: 300, width: 120, height: 50 },
  { id: 'shape3', offsetX: 150, offsetY: 200, width: 120, height: 50 }
  ];

  public connectors: ConnectorModel[] = [
     { id: 'connector', sourceID: 'shape1', targetID: 'shape2', type: 'Orthogonal' }
  ];
  public getNodeDefaults(obj: NodeModel): NodeModel {
    obj = { style: { strokeColor: '#6BA5D7', fill: '#6BA5D7' } };
    return obj;
  }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

4.In some situations, automatic line routing enabled diagram needs to ignore a specific connector from automatic line routing. So, in this case, auto routing feature can be disabled to the specific connector using the constraints property of the connector like the following code snippet.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { Diagram, DiagramComponent, NodeModel, ConnectorModel } from '@syncfusion/ej2-angular-diagrams';
import { NodeConstraints, LineRouting, DiagramConstraints, ConnectorConstraints, SnapConstraints, SnapSettingsModel } from '@syncfusion/ej2-diagrams';
Diagram.Inject(LineRouting);

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="645px" [nodes]='nodes' [connectors]='connectors' [getNodeDefaults]='getNodeDefaults' [constraints]='constraints'>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild('diagram')
  public diagram: DiagramComponent;
  public constraints: DiagramConstraints = DiagramConstraints.Default | DiagramConstraints.LineRouting;
  public nodes: NodeModel[] = [
    { id: 'shape1', offsetX: 100, offsetY: 100, width: 120, height: 50 },
    { id: 'shape2', offsetX: 350, offsetY: 300, width: 120, height: 50 },
    { id: 'shape3', offsetX: 150, offsetY: 200, width: 120, height: 50 },
    { id: 'shape4', offsetX: 300, offsetY: 200, width: 120, height: 50 }
  ];

  public connectors: ConnectorModel[] = [
    { id: 'connector', sourceID: 'shape1', targetID: 'shape2', type: 'Orthogonal', annotations: [{ offset: .7, content: ' Routing \n enabled', style: { fill: "white" } }] },
    { id: 'connector2', sourceID: 'shape1', targetID: 'shape2', annotations: [{ offset: .6, content: ' Routing \n disabled', style: { fill: "white" } }], type: 'Orthogonal', constraints: ConnectorConstraints.Default & ~ConnectorConstraints.InheritLineRouting }
  ];
  public getNodeDefaults(obj: NodeModel): NodeModel {
    obj = { style: { strokeColor: '#6BA5D7', fill: '#6BA5D7' } };
    return obj;
  }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Constraints

The constraints property of connector allows to enable/disable certain features of connectors. To enable or disable the constraints, refer constraints.

The following code illustrates how to disable selection.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, DecoratorModel, PointModel, ConnectorConstraints } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector1' type='Straight' [sourcePoint]='sourcePoint1' [targetPoint]='targetPoint1' [constraints]='constraints'></e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint1: PointModel;
    public targetPoint1: PointModel;
    public constraints: ConnectorConstraints;
    ngOnInit(): void {
        this.sourcePoint1 = { x: 100, y: 100 };
        this.targetPoint1 = { x: 200, y: 200 };
        this.constraints = ConnectorConstraints.Default & ~ConnectorConstraints.Select;
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Custom properties

The addInfo property of connectors allow you to maintain additional information to the connectors.

<e-connectors>
    <e-connector id='connector1' type='Straight' addInfo='centralconnector' [sourcePoint]='sourcePoint1' [targetPoint]='targetPoint1' [constraints]='constraints'></e-connector>
</e-connectors>

Stack order

The connectors zIndex property specifies the stack order of the connector. A connector with greater stack order is always in front of a connector with a lower stack order.

The following code illustrates how to render connector based on the stack order.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { DiagramComponent, Diagram, ConnectorModel, DecoratorModel, PointModel, ConnectorConstraints } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" [getConnectorDefaults] ='getConnectorDefaults'>
        <e-connectors>
            <e-connector id='connector1' type='Straight' zIndex=2 [sourcePoint]='sourcePoint1' [targetPoint]='targetPoint1'></e-connector>
            <e-connector id='connector2' type='Straight' zIndex=1 [sourcePoint]='sourcePoint2' [targetPoint]='targetPoint2'></e-connector>
        </e-connectors>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public sourcePoint1: PointModel;
    public targetPoint1: PointModel;
    public sourcePoint2: PointModel;
    public targetPoint2: PointModel;
    ngOnInit(): void {
        this.sourcePoint1 = { x: 100, y: 100 };
        this.targetPoint1 = { x: 200, y: 200 };
        this.sourcePoint2 = { x: 200, y: 100 };
        this.targetPoint2 = { x: 100, y: 200 };
    }
    public getConnectorDefaults(obj: ConnectorModel): ConnectorModel {
        obj.style = {
            strokeColor: '#6BA5D7',
            fill: '#6BA5D7',
            strokeWidth: 2
        }
        obj.targetDecorator = {
            style: {
                fill: '#6BA5D7',
                strokeColor: '#6BA5D7'
            }
        }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Enable Connector Splitting

The connectors are used to create a link between two points, ports, or nodes to represent the relationship between them. Split the connector between two nodes when dropping a new node onto an existing connector and create a connection between the new node and existing nodes by setting the enableConnectorSplit as true. The default value of the enableConnectorSplit is false.

The following code illustrates how to split the connector and create a connection with new node.

app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { Diagram, DiagramComponent, NodeModel, ConnectorModel,ConnectorConstraints  } from '@syncfusion/ej2-angular-diagrams';

@Component({
    selector: "app-container",
    template: `<ejs-diagram #diagram id="diagram" width="100%" height="580px" enableConnectorSplit:true [nodes]='nodes' [connectors]='connectors'>
    </ejs-diagram>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent {
    @ViewChild("diagram")
    public diagram: DiagramComponent;
    public constraints: ConnectorConstraints;
    public nodes: NodeModel[] = [
    { id: 'node1', offsetX: 150, offsetY: 150, width: 100, height: 100, annotations: [{ content: 'node1' }] },
    { id: 'node2', offsetX: 650, offsetY: 150, width: 100, height: 100, annotations: [{ content: 'node2' }] },
    { id: 'node3', offsetX: 490, offsetY: 290, width: 100, height: 100, annotations: [{ content: 'node3' }] }
  ];
    public connectors: ConnectorModel[] = [{
        id: 'connector1',sourceID:"node1",targetID:"node2",
        constraints: ConnectorConstraints.Default | ConnectorConstraints.AllowDrop
    }
  ];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule } from '@syncfusion/ej2-angular-diagrams';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, DiagramModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Enable Connector Split