BuyLog In
DevExtreme
All docs
V 23.2
24.1
23.2
23.1
22.2
The page you are viewing does not exist in version 22.2.
22.1
The page you are viewing does not exist in version 22.1.
21.2
The page you are viewing does not exist in version 21.2.
21.1
The page you are viewing does not exist in version 21.1.
20.2
The page you are viewing does not exist in version 20.2.
20.1
The page you are viewing does not exist in version 20.1.
19.2
The page you are viewing does not exist in version 19.2.
19.1
The page you are viewing does not exist in version 19.1.
18.2
The page you are viewing does not exist in version 18.2.
18.1
The page you are viewing does not exist in version 18.1.
17.2
The page you are viewing does not exist in version 17.2.
All docs
V23.2

General Information

.NET Subscription

What's Included
DevExpress Installation
DevExpress Code Examples

Common Tools

Project Converter
Assembly Deployment Tool
Localization Service

Quality Assurance and Productivity

CodeRush for Visual Studio (FREE)
TestCafe Studio

Desktop

Controls

WinForms
WPF
VCL
WinUI

Tools

WinForms Skin Editor
WPF Theme Designer
WPF Theme Editor (Legacy)
Coded UI Test Extension

Frameworks and Libraries

XAF - Cross-Platform .NET App UI
XPO - .NET ORM Library (FREE)
XPO Profiler
Core Libraries
Drawing Graphics Library
.NET App Security & Web API Service (FREE)

Web

Controls and Extensions

ASP.NET Web Forms Controls
ASP.NET MVC Extensions
ASP.NET Core Controls
ASP.NET Bootstrap Controls
DevExtreme
DevExtreme ASP.NET MVC Controls
Blazor Components

Tools

ASP.NET Theme Builder
ASP.NET Theme Deployer

Maintenance Mode

ASP.NET Core Bootstrap Controls

Mobile

Xamarin UI Controls (FREE)
.NET MAUI (FREE)

Enterprise and Analytic Tools

Reporting
Report and Dashboard Server
BI Dashboard
Office File API

End-User Documentation

Interface Elements for Desktop
Interface Elements for Web
Dashboard for Desktop
Dashboard for Web
24.1
23.2
23.1
22.2
The page you are viewing does not exist in version 22.2.
22.1
The page you are viewing does not exist in version 22.1.
21.2
The page you are viewing does not exist in version 21.2.
21.1
The page you are viewing does not exist in version 21.1.
20.2
The page you are viewing does not exist in version 20.2.
20.1
The page you are viewing does not exist in version 20.1.
19.2
The page you are viewing does not exist in version 19.2.
19.1
The page you are viewing does not exist in version 19.1.
18.2
The page you are viewing does not exist in version 18.2.
18.1
The page you are viewing does not exist in version 18.1.
17.2
The page you are viewing does not exist in version 17.2.
Full-text search
Overview
Getting Started
UI Components
Accordion
ActionSheet
Autocomplete
BarGauge
Box
Bullet
Button
ButtonGroup
Calendar
Chart
CheckBox
CircularGauge
ColorBox
ContextMenu
DataGrid
DateBox
DateRangeBox
DeferRendering
Diagram
Draggable
Drawer
DropDownBox
DropDownButton
FileManager
FileUploader
FilterBuilder
Floating Action Button
Form
Funnel
Gallery
Gantt
Getting Started
How To
API
Configuration
Methods
Events
Types
ContentReadyEvent
ContextMenuPreparingEvent
cancel
component
data
element
event
items
targetKey
targetType
CustomCommandEvent
DependencyDeletedEvent
DependencyDeletingEvent
DependencyInsertedEvent
DependencyInsertingEvent
DisposingEvent
GanttPdfExportDateRange
GanttPdfExportMode
GanttPredefinedContextMenuItem
GanttPredefinedToolbarItem
GanttRenderScaleType
GanttScaleType
GanttTaskTitlePosition
InitializedEvent
OptionChangedEvent
ResourceAssignedEvent
ResourceAssigningEvent
ResourceDeletedEvent
ResourceDeletingEvent
ResourceInsertedEvent
ResourceInsertingEvent
ResourceManagerDialogShowingEvent
ResourceUnassignedEvent
ResourceUnassigningEvent
ScaleCellPreparedEvent
SelectionChangedEvent
TaskClickEvent
TaskDblClickEvent
TaskDeletedEvent
TaskDeletingEvent
TaskEditDialogShowingEvent
TaskInsertedEvent
TaskInsertingEvent
TaskMovingEvent
TaskUpdatedEvent
TaskUpdatingEvent
Demos
HtmlEditor
LinearGauge
List
LoadIndicator
LoadPanel
Lookup
Map
Menu
MultiView
NumberBox
PieChart
PivotGrid
PivotGridFieldChooser
PolarChart
Popover
Popup
ProgressBar
RadioGroup
RangeSelector
RangeSlider
Resizable
ResponsiveBox
Sankey
Scheduler
ScrollView
SelectBox
Slider
Sortable
Sparkline
Switch
TabPanel
Tabs
TagBox
TextArea
TextBox
TileView
Toast
Toolbar
Tooltip
TreeList
TreeMap
TreeView
VectorMap
Common Types
Utilities
Data Binding
Data Validation
Localization and Globalization
UI Customization
DevExtreme CLI
Data Analytics and BI
.NET Backend Solutions
Advanced Topics
Troubleshooting
Migrate to the New Version

General Information

.NET Subscription

What's Included
DevExpress Installation
DevExpress Code Examples

Common Tools

Project Converter
Assembly Deployment Tool
Localization Service

Quality Assurance and Productivity

CodeRush for Visual Studio (FREE)
TestCafe Studio

Desktop

Controls

WinForms
WPF
VCL
WinUI

Tools

WinForms Skin Editor
WPF Theme Designer
WPF Theme Editor (Legacy)
Coded UI Test Extension

Frameworks and Libraries

XAF - Cross-Platform .NET App UI
XPO - .NET ORM Library (FREE)
XPO Profiler
Core Libraries
Drawing Graphics Library
.NET App Security & Web API Service (FREE)

Web

Controls and Extensions

ASP.NET Web Forms Controls
ASP.NET MVC Extensions
ASP.NET Core Controls
ASP.NET Bootstrap Controls
DevExtreme
DevExtreme ASP.NET MVC Controls
Blazor Components

Tools

ASP.NET Theme Builder
ASP.NET Theme Deployer

Maintenance Mode

ASP.NET Core Bootstrap Controls

Mobile

Xamarin UI Controls (FREE)
.NET MAUI (FREE)

Enterprise and Analytic Tools

Reporting
Report and Dashboard Server
BI Dashboard
Office File API

End-User Documentation

Interface Elements for Desktop
Interface Elements for Web
Dashboard for Desktop
Dashboard for Web

jQuery Gantt - ContextMenuPreparingEvent

The type of the contextMenuPreparing event handler's argument.

import { ContextMenuPreparingEvent } from "devextreme/ui/gantt"
Type:

Object

Used in:

cancel

Specifies whether the event is cancelable.

Type:

Boolean

component

Type:

Gantt

data

Type: any

element

Type:

HTMLElement | jQuery

event

items

Type:

Array<Object>

targetKey

Type: any

targetType

Type:

String