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Configuration

An object that defines the Diagram UI component's configuration properties.

See Also

autoZoomMode

Specifies how the Diagram UI component automatically zooms the work area.

Type:

String

Default Value: 'disabled'
Accepted Values: 'fitContent' | 'fitWidth' | 'disabled'

Use the DiagramAutoZoomMode enum to specify this property when the UI component is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: FitContent, FitWidth, Disabled.

contextMenu

Configures the context menu's settings.

Type:

Object

Default Value: {}

contextToolbox

Configures the context toolbox's settings.

Type:

Object

Default Value: {}

View Demo

The context toolbox appears when you draw a connector from a shape and release it without it being connected to another shape. The toolbox allows you to create a shape at the end of the connector.

Diagram context toolbox

customShapeComponent

An alias for the customShapeTemplate property specified in React. Accepts a custom component. Refer to Using a Custom Component for more information.

customShapeRender

An alias for the customShapeTemplate property specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information.

customShapes[]

Provide access to an array of custom shapes.

Type:

Array<Object>

Default Value: []

Use the customShapes property to extend a collection of built-in shapes with custom shapes.

Use the toolbox property to add the custom shapes to the toolbox.

jQuery
index.js
$(function() {
    var diagram = $("#diagram").dxDiagram({
        customShapes: [{
            category: "hardware",
            type: "internet",
            title: "Internet",
            backgroundImageUrl: "images/shapes/internet.svg",
            backgroundImageLeft: 0.15,
            backgroundImageTop: 0,
            backgroundImageWidth: 0.7,
            backgroundImageHeight: 0.7,
            defaultWidth: 0.75,
            defaultHeight: 0.75,
            defaultText: "Internet",
            allowEditText: true,
            textLeft: 0,
            textTop: 0.7,
            textWidth: 1,
            textHeight: 0.3,
            connectionPoints: [
                { x: 0.5, y: 0 },
                { x: 0.9, y: 0.5 },
                { x: 0.5, y: 1 },
                { x: 0.1, y: 0.5 }
            ]
        },
        ...
    ],
    toolbox: {
        groups: [{ category: "hardware", title: "Hardware" }]
    }
}).dxDiagram("instance");
Angular
app.component.html
app.component.ts
<dx-diagram #diagram id="diagram">
    <dxi-custom-shape 
        category="hardware"
        type="internet"
        title="Internet"
        backgroundImageUrl="images/shapes/internet.svg"
        [backgroundImageLeft]="0.15"
        [backgroundImageTop]="0"
        [backgroundImageWidth]="0.7"
        [backgroundImageHeight]="0.7"
        [defaultWidth]="0.75"
        [defaultHeight]="0.75"
        defaultText="Internet"
        [allowEditText]="false"
        [textLeft]="0"
        [textTop]="0.7"
        [textWidth]="1"
        [textHeight]="0.3">
        <dxi-connection-point [x]="0.5" [y]="0"></dxi-connection-point>
        <dxi-connection-point [x]="0.9" [y]="0.5"></dxi-connection-point>
        <dxi-connection-point [x]="0.5" [y]="1"></dxi-connection-point>
        <dxi-connection-point [x]="0.1" [y]="0.5"></dxi-connection-point>
    </dxi-custom-shape>
    ...
    <dxo-toolbox>
        <dxi-group category="hardware" title="Hardware"></dxi-group>
    </dxo-toolbox>
</dx-diagram>
import { NgModule, Component, ViewChild, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { HttpClient, HttpClientModule } from '@angular/common/http';

import { DxDiagramModule, DxDiagramComponent } from 'devextreme-angular';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    @ViewChild(DxDiagramComponent, { static: false }, { static: false }) diagram: DxDiagramComponent;
    // Prior to Angular 8
    // @ViewChild(DxDiagramComponent, { static: false }) diagram: DxDiagramComponent;

    constructor(http: HttpClient) {
        http.get('data/diagram-hardware.json').subscribe(data => {
            this.diagram.instance.import(JSON.stringify(data));
        }, err => {
            throw 'Data Loading Error'
        });
    }
}
Vue
App.vue
<template>
    <DxDiagram
        id="diagram"
        ref="diagram"
    >
        <DxCustomShape
            :category="'hardware'"
            :type="'internet'"
            :title="'Internet'"
            :background-image-url="'images/shapes/internet.svg'"
            :background-image-left="0.15"
            :background-image-top="0"
            :background-image-width="0.7"
            :background-image-height="0.7"
            :default-width="0.75"
            :default-height="0.75"
            :default-text="'Internet'"
            :allow-edit-text="true"
            :text-left="0"
            :text-top="0.7"
            :text-width="1"
            :text-height="0.3"
        >
            <DxConnectionPoint
                :x="0.5"
                :y="0"
            />
            <DxConnectionPoint
                :x="0.9"
                :y="0.5"
            />
            <DxConnectionPoint
                :x="0.5"
                :y="1"
            />
            <DxConnectionPoint
                :x="0.1"
                :y="0.5"
            />
        </DxCustomShape>
        ...
        <DxToolbox :visible="true">
            <DxGroup
                :category="'hardware'"
                :title="'Hardware'"
            />
        </DxToolbox>
    </DxDiagram>
</template>

<script>
import { DxDiagram, DxGroup, DxToolbox, DxCustomShape, DxConnectionPoint } from 'devextreme-vue/diagram';
import 'whatwg-fetch';

export default {
components: {
    DxDiagram, DxGroup, DxToolbox, DxCustomShape, DxConnectionPoint
},
mounted() {
    var diagram = this.$refs['diagram'].instance;
    fetch('data/diagram-hardware.json')
    .then(function(response) {
        return response.json();
    })
    .then(function(json) {
        diagram.import(JSON.stringify(json));
    })
    .catch(function() {
        throw 'Data Loading Error';
    });
}
};
</script>
React
App.js
import React from 'react';
import Diagram, { CustomShape, ConnectionPoint, Group, Toolbox } from 'devextreme-react/diagram';

class App extends React.Component {
constructor(props) {
    super(props);

    this.diagramRef = React.createRef();
}

    render() {
        return (
            <Diagram id="diagram" ref={this.diagramRef}>
                <CustomShape
                    category="hardware"
                    type="internet"
                    title="Internet"
                    backgroundImageUrl="images/shapes/internet.svg"
                    backgroundImageLeft={0.15}
                    backgroundImageTop={0}
                    backgroundImageWidth={0.7}
                    backgroundImageHeight={0.7}
                    defaultWidth={0.75}
                    defaultHeight={0.75}
                    defaultText="Internet"
                    allowEditText={true}
                    textLeft={0}
                    textTop={0.7}
                    textWidth={1}
                    textHeight={0.3}>
                <ConnectionPoint x={0.5} y={0} />
                <ConnectionPoint x={0.9} y={0.5} />
                <ConnectionPoint x={0.5} y={1} />
                <ConnectionPoint x={0.1} y={0.5} />
                </CustomShape>
                ...
                <Toolbox>
                    <Group category="hardware" title="Hardware" />
                </Toolbox>
            </Diagram>
        );
    }
}
export default App;
ASP.NET MVC Controls
CustomShapesWithIcons.cshtml
@(Html.DevExtreme().Diagram()
    .ID("diagram")
    .CustomShapes(cs => {
        cs.Add()
            .Category("hardware")
            .Type("internet")
            .Title("Internet")
            .BackgroundImageUrl("../../Content/Images/shapes/internet.svg")
            .BackgroundImageLeft(0.15)
            .BackgroundImageTop(0)
            .BackgroundImageWidth(0.7)
            .BackgroundImageHeight(0.7)
            .DefaultWidth(1.9)
            .DefaultHeight(1.9)
            .DefaultText("Internet")
            .AllowEditText(true)
            .TextLeft(0)
            .TextTop(0.7)
            .TextWidth(1)
            .TextHeight(0.3)
            .ConnectionPoints(cp => {
                cp.Add().X(0.5).Y(0);
                cp.Add().X(0.9).Y(0.5);
                cp.Add().X(0.5).Y(1);
                cp.Add().X(0.1).Y(0.5);

            });
        ...    
    })
    .Toolbox(tb => tb
        .Groups(g => g.Add().Category("hardware").Title("Hardware"))
    )
)    

View Demo

See Also

customShapeTemplate

Specifies a custom template for shapes.

Type:

template

Template Data:
Name Type Description
item dxDiagramShape

The processed shape's object.

The template content must be presented as SVG elements.

Use the template property to define a template of an individual shape.

NOTE

If the textExpr option is specified, template content may overlap with text from the data source.

Since the textExpr option has the default value 'text', the widget will obtain node texts from the data source’s 'text' field. To prevent his behavior, set the option to an empty string: nodes: { textExpr: "", ....

View Demo View Demo

See Also

customShapeToolboxComponent

An alias for the customShapeToolboxTemplate property specified in React. Accepts a custom component. Refer to Using a Custom Component for more information.

customShapeToolboxRender

An alias for the customShapeToolboxTemplate property specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information.

customShapeToolboxTemplate

Specifies a custom template for shapes in the toolbox.

Type:

template

Template Data:
Name Type Description
item dxDiagramShape

Information about the currently processed shape.

The template content must be presented as SVG elements.

Use the toolboxTemplate property to define a template for each shape in the toolbox.

View Demo

See Also

defaultItemProperties

Configures default item properties.

Type:

Object

Default Value: {}

Default property values are applied to newly created items if no other values are provided.

index.js
$(function() {
    $("#diagram").dxDiagram({
        nodes: {
            //...
        },
        defaultItemProperties: {
            connectorLineStart: "outlinedTriangle",
            connectorLineEnd: "none",
            connectorLineType: "straight",
            style: "fill: #d9d9d9; stroke: #999999",
            textStyle: "font-weight: bold; text-decoration: underline"
        }
    });
});

disabled

Specifies whether the UI component responds to user interaction.

Type:

Boolean

Default Value: false

edges

Allows you to bind the collection of diagram edges to a data source. For more information, see the Data Binding section.

Type:

Object

Default Value: null

editing

Specifies which editing operations a user can perform.

Type:

Object

Default Value: {}

elementAttr

Specifies the global attributes to be attached to the UI component's container element.

Type:

Object

Default Value: {}

jQuery
$(function(){
    $("#diagramContainer").dxDiagram({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});
Angular
HTML
TypeScript
<dx-diagram ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-diagram>
import { DxDiagramModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxDiagramModule
    ],
    // ...
})
Vue
App.vue
<template>
    <DxDiagram ...
        :element-attr="diagramAttributes">
    </DxDiagram>
</template>

<script>
import DxDiagram from 'devextreme-vue/diagram';

export default {
    components: {
        DxDiagram
    },
    data() {
        return {
            diagramAttributes: {
                id: 'elementId',
                class: 'class-name'
            }
        }
    }
}
</script>
React
App.js
import React from 'react';

import Diagram from 'devextreme-react/diagram';

class App extends React.Component {
    diagramAttributes = {
        id: 'elementId',
        class: 'class-name'
    }

    render() {
        return (
            <Diagram ...
                elementAttr={this.diagramAttributes}>
            </Diagram>
        );
    }
}
export default App;

export

Configures export settings.

Type:

Object

These settings are used when a diagram is exported via a UI.

The Export button invokes a drop-down menu that lists export commands. The following formats are supported: PNG, JPEG, and SVG.

fullScreen

Specifies whether or not to display the UI component in full-screen mode.

Type:

Boolean

Default Value: false

If the Diagram UI component is contained in a frame, the fullScreen property can be set in a user-generated event handler (a button click, a key press) for security reasons.

gridSize

Specifies the grid pitch.

Type:

Number

|

Object

When the showGrid property is set to true, the Diagram UI component displays grid lines that help users align diagram elements. Use the gridSize property to specify the grid pitch.

The units property specifies the measurement unit.

jQuery
JavaScript
$(function() {
    $("#diagram").dxDiagram({
        viewUnits: "cm",
        units: "cm",
        gridSize: {
            value: 2,
            items: [1, 2, 3]
        },
        // or
        // gridSize: 2,
    });
});
See Also

hasChanges

Indicates whether diagram content has been changed.

Type:

Boolean

Default Value: false

The hasChanges property is set to true on any diagram change. You can use this property together with the optionChanged event to implement diagram content autosave.

jQuery
var autoSaveIntervalMs = 2000;
var autoSaveTimeout = -1;
$("#diagram").dxDiagram({
onOptionChanged: function(e) {
    if(e.name === "hasChanges" && e.value && autoSaveTimeout === -1) {
        autoSaveTimeout = setTimeout(function() {
            var data = e.component.export();
            window.localStorage.setItem("foo", data); // store data in some storage
            autoSaveTimeout = -1;
            e.component.option("hasChanges", false);
        }, autoSaveIntervalMs);
    }
}
...  

height

Specifies the UI component's height.

Type:

Number

|

String

|

Function

Return Value:

Number

|

String

The UI component's height.

Default Value: undefined

This property accepts a value of one of the following types:

  • Number
    The height in pixels.

  • String
    A CSS-accepted measurement of height. For example, "55px", "80%", "inherit".

  • Function
    A function returning either of the above. For example:

    JavaScript
    height: function() {
        return window.innerHeight / 1.5;
    }

historyToolbar

Configures the history toolbar's settings.

Type:

Object

Default Value: {}

mainToolbar

Configures the main toolbar settings.

Type:

Object

Default Value: {}

nodes

Allows you to bind the collection of diagram nodes to a data source. For more information, see the Data Binding section.

Type:

Object

Default Value: null

onContentReady

A function that is executed when the UI component's content is ready and each time the content is changed.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component's instance.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only when using Knockout.

Default Value: null

onCustomCommand

A function that is executed after a custom command item was clicked and allows you to implement the custom command's logic.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component instance's name.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

name

String

The name of the clicked item.

onDisposing

A function that is executed before the UI component is disposed of.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component's instance.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onInitialized

A function used in JavaScript frameworks to save the UI component instance.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component's instance.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

Default Value: null

See Also

onItemClick

A function that is executed after a shape or connector is clicked.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component instance's name.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

item dxDiagramItem

A dxDiagramItem object descendant (DiagramShape or DiagramConnector) related to the event.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onItemDblClick

A function that is executed after a shape or connector is double-clicked.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component instance's name.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

item dxDiagramItem

A dxDiagramItem object descendant (DiagramShape or DiagramConnector) related to the event.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onOptionChanged

A function that is executed after a UI component property is changed.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component's instance.

fullName

String

The path to the modified property that includes all parent properties.

name

String

The modified property if it belongs to the first level. Otherwise, the first-level property it is nested into.

value any

The modified property's new value.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

The following example shows how to subscribe to component property changes:

jQuery
index.js
$(function() {
    $("#diagramContainer").dxDiagram({
        // ...
        onOptionChanged: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-diagram ...
    (onOptionChanged)="handlePropertyChange($event)"> 
</dx-diagram>
import { Component } from '@angular/core'; 

@Component({ 
    selector: 'app-root', 
    templateUrl: './app.component.html', 
    styleUrls: ['./app.component.css'] 
}) 

export class AppComponent { 
    // ...
    handlePropertyChange(e) {
        if(e.name === "changedProperty") { 
            // handle the property change here
        }
    }
}
import { BrowserModule } from '@angular/platform-browser'; 
import { NgModule } from '@angular/core'; 
import { AppComponent } from './app.component'; 
import { DxDiagramModule } from 'devextreme-angular'; 

@NgModule({ 
    declarations: [ 
        AppComponent 
    ], 
    imports: [ 
        BrowserModule, 
        DxDiagramModule 
    ], 
    providers: [ ], 
    bootstrap: [AppComponent] 
}) 

export class AppModule { }  
Vue
App.vue
<template> 
    <DxDiagram ...
        @option-changed="handlePropertyChange"
    />            
</template> 

<script> 
import 'devextreme/dist/css/dx.common.css'; 
import 'devextreme/dist/css/dx.light.css'; 
import DxDiagram from 'devextreme-vue/diagram'; 

export default { 
    components: { 
        DxDiagram
    }, 
    // ...
    methods: { 
        handlePropertyChange: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    } 
} 
</script> 
React
App.js
import React from 'react'; 
import 'devextreme/dist/css/dx.common.css'; 
import 'devextreme/dist/css/dx.light.css'; 

import Diagram from 'devextreme-react/diagram'; 

const handlePropertyChange = (e) => {
    if(e.name === "changedProperty") {
        // handle the property change here
    }
}

export default function App() { 
    return ( 
        <Diagram ...
            onOptionChanged={handlePropertyChange}
        />        
    ); 
} 

onRequestEditOperation

A function that allows you to prohibit an edit operation at run time.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
allowed

Boolean

Specifies whether the edit operation is allowed. Default value: true.

args dxDiagramAddShapeArgs | dxDiagramAddShapeFromToolboxArgs | dxDiagramDeleteShapeArgs | dxDiagramDeleteConnectorArgs | dxDiagramChangeConnectionArgs | dxDiagramChangeConnectorPointsArgs | dxDiagramBeforeChangeShapeTextArgs | dxDiagramChangeShapeTextArgs | dxDiagramBeforeChangeConnectorTextArgs | dxDiagramChangeConnectorTextArgs | dxDiagramResizeShapeArgs | dxDiagramMoveShapeArgs

An object that contains information about the processed shape or connector. The parameter's value type depends on the operation.

component Diagram

The UI component instance's name.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

operation 'addShape' | 'addShapeFromToolbox' | 'deleteShape' | 'deleteConnector' | 'changeConnection' | 'changeConnectorPoints' | 'beforeChangeShapeText' | 'changeShapeText' | 'beforeChangeConnectorText' | 'changeConnectorText' | 'resizeShape' | 'moveShape'

The processed operation.

reason 'checkUIElementAvailability' | 'modelModification'

Identifies the reason why the event is raised.

Default Value: null

If you want to disable a specific operation type for the entire diagram, you can also set an Allow{Operation} property to false.

View Demo

See Also

onRequestLayoutUpdate

The Diagram UI component reloads the modified diagram data every time the data source changes. The onRequestLayoutUpdate function is executed after diagram data is reloaded and allows you to specify whether or not the UI component should update the diagram layout.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
allowed

Boolean

Specifies whether or not the diagram layout should be updated. Default value: false.

changes

Array<any>

The received changes.

component Diagram

The UI component instance's name.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onSelectionChanged

A function that is executed after the selection is changed in the Diagram.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component Diagram

The UI component instance's name.

element

HTMLElement or jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

items

Array<dxDiagramItem>

An array of selected items (DiagramShapes or DiagramConnectors).

model

Object

Model data. Available only if you use Knockout.

Default Value: null

pageColor

Specifies the color of a diagram page.

Type:

String

Default Value: 'white'

The following color formats are available:

  • Longhand and shorthand hexadecimal notations. For example, "#3b3", "#31bb32".

  • RGB and RGBA formats. For example, "rgb(51,187,51)", "rgba(0,204,0,1)".

  • Named colors. For example, "darkturquoise".

NOTE
  • If you call the import method, it applies the imported page settings and the pageColor property is ignored.

  • Page settings are stored in a diagram model. The pageColor property is not in effect if the model is read-only (the readOnly property is set to true).

pageOrientation

Specifies the page orientation.

Type:

String

Default Value: 'portrait'
Accepted Values: 'portrait' | 'landscape'

NOTE
  • If you call the import method, it applies the imported page settings and the pageOrientation property is ignored.

  • Page settings are stored in a diagram model. The pageOrientation property is not in effect if the model is read-only (the readOnly property is set to true).

Use the DiagramPageOrientation enum to specify this property when the UI component is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: Portrait, Landscape.

pageSize

Specifies a size of pages.

Type:

Object

The units property specifies the page's measurement units.

jQuery
JavaScript
$(function() {
    $("#diagram").dxDiagram({
        units: "cm",
        pageSize: {
            width: 10,
            height: 10,
        },
    });
});
NOTE
  • If you call the import method, it applies the imported page settings and the pageSize property is ignored.

  • Page settings are stored in a diagram model. The pageSize property is not in effect if the model is read-only (the readOnly property is set to true).

propertiesPanel

Configures the Properties panel settings.

Type:

Object

Default Value: {}

readOnly

Specifies whether the diagram is read-only.

Type:

Boolean

Default Value: false

Set the readOnly property to true to prohibit users from editing the diagram.

View Demo

NOTE
Diagram page settings are stored in a diagram model. When the readOnly property is set to true, the model can not be modified and page settings (pageColor, pageOrientation, and pageSize) are not in effect.

rtlEnabled

Switches the UI component to a right-to-left representation.

Type:

Boolean

Default Value: false

When this property is set to true, the UI component text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

JavaScript
DevExpress.config({
    rtlEnabled: true
});
See Also

showGrid

Specifies whether grid lines are visible.

Type:

Boolean

Default Value: true

See Also

simpleView

Switch the Diagram UI component to simple view mode.

Type:

Boolean

Default Value: false

In simple view mode, the control does not divide the work area into pages and the diagram's content occupies all the available area inside the component.

View Demo

snapToGrid

Specifies whether diagram elements should snap to grid lines.

Type:

Boolean

Default Value: true

See Also

toolbox

Configures the toolbox settings.

Type:

Object

Default Value: {}

View Demo

The toolbox contains groups of shapes. Use this property to access the toolbox settings.

Diagram toolbox

units

Specifies the unit for measurement properties (for example, defaultHeight, gridSize, leftExpr).

Type:

String

Default Value: 'in'
Accepted Values: 'in' | 'cm' | 'px'

Use the DiagramUnits enum to specify this property when the UI component is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: In, Cm, Px.

viewToolbar

Configures the view toolbar settings.

Type:

Object

Default Value: {}

viewUnits

Specifies the measurement unit that is displayed in user interface elements.

Type:

String

Default Value: 'in'
Accepted Values: 'in' | 'cm' | 'px'

The viewUnits property specifies the measurement unit in Properties panel and in the Diagram work area.

Diagram viewUnits

Use the DiagramUnits enum to specify this property when the UI component is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: In, Cm, Px.

visible

Specifies whether the UI component is visible.

Type:

Boolean

Default Value: true

width

Specifies the UI component's width.

Type:

Number

|

String

|

Function

Return Value:

Number

|

String

The UI component's width.

Default Value: undefined

This property accepts a value of one of the following types:

  • Number
    The width in pixels.

  • String
    A CSS-accepted measurement of width. For example, "55px", "80%", "auto", "inherit".

  • Function
    A function returning either of the above. For example:

    JavaScript
    width: function() {
        return window.innerWidth / 1.5;
    }

zoomLevel

Specifies the zoom level.

Type:

Number

|

Object

Default Value: 1

jQuery
JavaScript
$(function() {
    $("#diagram").dxDiagram({
        zoomLevel: 0.75,
    });
});