TreeListRowClickEventArgs.InputDevice Property
Returns the input device that triggered the event.
Namespace: DevExpress.Blazor
Assembly: DevExpress.Blazor.v24.1.dll
NuGet Package: DevExpress.Blazor
Declaration
public InputDevice InputDevice { get; }
Property Value
Type | Description |
---|---|
InputDevice | The input device that triggered the event. |
Available values:
Name | Description |
---|---|
Pointer | A pointing device. |
Keyboard | A keyboard. |
Remarks
The TreeList component raises the RowClick event in response to the following actions:
- A user clicks a row with a pointing device.
- A user focuses a data cell in display mode and presses Enter.
Use the InputDevice
event argument to determine which action triggered the RowClick event. For the RowDoubleClick event, the InputDevice
property always returns Pointer
.
The following example expands/collapses a row once a user double-clicks the row or focuses it and presses Enter:
@inject EmployeeTaskService EmployeeTaskService
<DxTreeList Data="TreeListData"
KeyFieldName="Id"
ParentKeyFieldName="ParentId"
RowClick="OnRowClick"
RowDoubleClick="OnRowDoubleClick">
<Columns>
<DxTreeListDataColumn FieldName="Name" Caption="Task" />
<DxTreeListDataColumn FieldName="EmployeeName" />
<DxTreeListDataColumn FieldName="StartDate" />
<DxTreeListDataColumn FieldName="DueDate" />
</Columns>
</DxTreeList>
@code {
List<EmployeeTask> TreeListData { get; set; }
protected override void OnInitialized() {
TreeListData = EmployeeTaskService.GenerateData();
}
void OnRowDoubleClick(TreeListRowClickEventArgs e) {
if (e.TreeList.IsRowExpanded(e.VisibleIndex))
e.TreeList.CollapseRow(e.VisibleIndex);
else
e.TreeList.ExpandRow(e.VisibleIndex);
}
void OnRowClick(TreeListRowClickEventArgs e) {
if (e.InputDevice == InputDevice.Keyboard)
if (e.TreeList.IsRowExpanded(e.VisibleIndex))
e.TreeList.CollapseRow(e.VisibleIndex);
else
e.TreeList.ExpandRow(e.VisibleIndex);
}
}
See Also