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-
Data Grid
- Overview
-
Data Binding
-
Paging and Scrolling
-
Editing
-
Grouping
-
Filtering and Sorting
- Focused Row
-
Row Drag & Drop
-
Selection
-
Columns
- State Persistence
-
Appearance
-
Templates
-
Data Summaries
-
Master-Detail
-
Export to PDF
-
Export to Excel
-
Adaptability
- Keyboard Navigation
-
Pivot Grid
- Overview
-
Data Binding
-
Field Chooser
-
Features
-
Export to Excel
-
Tree List
- Overview
-
Data Binding
- Sorting
- Paging
-
Editing
- Node Drag & Drop
- Focused Row
-
Selection
-
Filtering
-
Column Customization
- State Persistence
- Adaptability
- Keyboard Navigation
-
Scheduler
- Overview
-
Data Binding
-
Views
-
Features
- Virtual Scrolling
-
Grouping
-
Customization
- Adaptability
-
Html Editor
-
Chat
-
Diagram
- Overview
-
Data Binding
-
Featured Shapes
-
Custom Shapes
-
Document Capabilities
-
User Interaction
- UI Customization
- Adaptability
-
Charts
- Overview
-
Data Binding
-
Area Charts
-
Bar Charts
- Bullet Charts
-
Doughnut Charts
-
Financial Charts
-
Line Charts
-
Pie Charts
-
Point Charts
-
Polar and Radar Charts
-
Range Charts
-
Sparkline Charts
-
Tree Map
-
Funnel and Pyramid Charts
- Sankey Chart
-
Combinations
-
More Features
-
Export
-
Selection
-
Tooltips
-
Zooming
-
-
Gantt
- Overview
-
Data
-
UI Customization
- Strip Lines
- Export to PDF
- Sorting
-
Filtering
-
Gauges
- Overview
-
Data Binding
-
Bar Gauge
-
Circular Gauge
-
Linear Gauge
-
Navigation
- Overview
- Accordion
-
Menu
- Multi View
-
Drawer
-
Tab Panel
-
Tabs
-
Toolbar
- Pagination
-
Tree View
- Right-to-Left Support
-
Layout
-
Tile View
- Splitter
-
Gallery
- Scroll View
- Resizable
-
-
Editors
- Overview
- Autocomplete
-
Calendar
- Check Box
- Color Box
- Date Box
-
Date Range Box
-
Drop Down Box
-
Number Box
-
Select Box
- Switch
-
Tag Box
- Text Area
- Text Box
- Validation
- Custom Text Editor Buttons
- Right-to-Left Support
- Editor Appearance Variants
-
Forms and Multi-Purpose
- Overview
- Button Group
- Field Set
-
Filter Builder
-
Form
- Radio Group
-
Range Selector
- Numeric Scale (Lightweight)
- Numeric Scale
- Date-Time Scale (Lightweight)
- Date-Time Scale
- Logarithmic Scale
- Discrete scale
- Custom Formatting
- Use Range Selection for Calculation
- Use Range Selection for Filtering
- Image on Background
- Chart on Background
- Customized Chart on Background
- Chart on Background with Series Template
- Range Slider
- Slider
-
Sortable
-
File Management
-
File Manager
- Overview
-
File System Types
-
Customization
-
File Uploader
-
-
Actions and Lists
-
Maps
- Overview
-
Map
-
Vector Map
-
Dialogs and Notifications
-
Localization
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Gantt - Context Menu
Our feature-complete Gantt component allows you to create and customize its context menu as needed. Use the contextMenu property and contextMenuPreparing event to access and manage context menu items.
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Backend API
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@using DevExtreme.MVC.Demos.Models.SampleData
@using DevExtreme.MVC.Demos.Models.Gantt
<div class="options">
<div class="caption">Options</div>
<div class="option">
@(Html.DevExtreme().CheckBox()
.ID("preventContextMenuShowing")
.Value(false)
.Text("Prevent Context Menu Showing")
)
</div>
<div class="option">
@(Html.DevExtreme().CheckBox()
.Value(true)
.Text("Customize Context Menu")
.OnValueChanged("customizeContextMenu_changed")
)
</div>
</div>
@(Html.DevExtreme().Gantt<Task>()
.ID("gantt")
.Tasks(t => t
.DataSource(ds => ds.Array().Data(SampleData.GanttTasks).Key("ID"))
.KeyExpr("ID")
.TitleExpr("Title")
.ParentIdExpr("ParentId")
.StartExpr("Start")
.EndExpr("End")
.ProgressExpr("Progress")
)
.Dependencies(d => d
.DataSource(ds => ds.Array().Data(SampleData.GanttDependencies).Key("ID"))
.KeyExpr("ID")
.PredecessorIdExpr("PredecessorId")
.SuccessorIdExpr("SuccessorId")
.TypeExpr("Type")
)
.Resources(r => r
.DataSource(ds => ds.Array().Data(SampleData.GanttResources).Key("ID"))
.KeyExpr("ID")
.TextExpr("Text")
)
.ResourceAssignments(ra => ra
.DataSource(ds => ds.Array().Data(SampleData.GanttResourceAssignments).Key("ID"))
.KeyExpr("ID")
.TaskIdExpr("TaskId")
.ResourceIdExpr("ResourceId")
)
.Editing(e => e.Enabled(true))
.Columns(columns => {
columns.AddFor(m => m.Title)
.Caption("Subject")
.Width(300);
columns.AddFor(m => m.Start)
.Caption("Start Date");
columns.AddFor(m => m.End)
.Caption("End Date");
})
.TaskListWidth(500)
.ScaleType(GanttScaleType.Weeks)
.OnCustomCommand("onCustomCommandClick")
.ContextMenu(cm => {
cm.Items(i => {
i.Add().Name(GanttContextMenuItem.AddTask);
i.Add().Name(GanttContextMenuItem.TaskDetails);
i.Add().Name(GanttContextMenuItem.DeleteTask);
i.Add().Name("ToggleDisplayOfResources").Text("Toggle Display of Resources");
});
})
.OnContextMenuPreparing("onContextMenuPreparing")
)
<script>
function getGanttInstance() {
return $("#gantt").dxGantt("instance");
}
function onContextMenuPreparing(e) {
e.cancel = $("#preventContextMenuShowing").dxCheckBox("instance").option("value");
}
function customizeContextMenu_changed(e) {
var ganttInstance = getGanttInstance();
var items = e.value ? getContextMenuItems() : undefined;
ganttInstance.option("contextMenu.items", items);
}
function onCustomCommandClick(e) {
var ganttInstance = getGanttInstance();
if (e.name == 'ToggleDisplayOfResources') {
var showResources = ganttInstance.option("showResources");
ganttInstance.option("showResources", !showResources);
}
}
function getContextMenuItems() {
return [
"addTask",
"taskdetails",
"deleteTask",
{
name: "ToggleDisplayOfResources",
text: "Toggle Display of Resources"
}
]
}
</script>
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