DataViewBase.GetIsEditorActivationAction Event

Allows you to specify whether an action (key down, text input, or mouse left button click) activates the focused editor.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v24.1.Core.dll

NuGet Package: DevExpress.Wpf.Grid.Core

Declaration

C#

public event EventHandler<GetIsEditorActivationActionEventArgs> GetIsEditorActivationAction

VB.NET

Public Event GetIsEditorActivationAction As EventHandler(Of GetIsEditorActivationActionEventArgs)

Event Data

The GetIsEditorActivationAction event's data class is GetIsEditorActivationActionEventArgs. The following properties provide information specific to this event:

Property	Description
ActivationAction	Gets an activation action’s type. Inherited from ActivationActionEventArgsBase.
Column	Gets or sets a grid column, for which an event has been raised. Inherited from EditorEventArgsBase.
Handled	Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
IsActivationAction	Gets or sets whether the action activates the focused cell’s editor.
KeyDownEventArgs	Event arguments for the KeyDown activation action. Inherited from ActivationActionEventArgsBase.
MouseLeftButtonEventArgs	Event arguments for the MouseLeftButton activation action. Inherited from ActivationActionEventArgsBase.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent	Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
RowHandle	Gets or sets the row handle, for which an event has been raised. Inherited from EditorEventArgsBase.
Source	Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.
TemplateChild	An in-place editor specified in a cell template. Inherited from ActivationActionEventArgsBase.
TextInputEventArgs	Event arguments for the TextInput activation action. Inherited from ActivationActionEventArgsBase.
Value	Gets the edit value stored in the editor, for which an event has been raised. Inherited from EditorEventArgsBase.

The event data class exposes the following methods:

Method	Description
InvokeEventHandler(Delegate, Object)	When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object)	When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.

Remarks

The following code sample shows how to prohibit end users from activating an editor using the mouse:

Xaml

<dxg:GridControl AutoGenerateColumns="AddNew" EnableSmartColumnsGeneration="True" ItemsSource="{Binding Items}" SelectionMode="Cell">
    <dxg:GridColumn FieldName="Country"/>
    <dxg:GridColumn FieldName="City">
        <dxg:GridColumn.CellTemplate>
            <DataTemplate>
                <dxe:ListBoxEdit x:Name="PART_Editor" ItemsSource="{Binding RowData.Row.Cities}" />
            </DataTemplate>
        </dxg:GridColumn.CellTemplate>
    </dxg:GridColumn>
    <dxg:GridControl.View>
        <dxg:TableView GetIsEditorActivationAction="GetIsEditorActivationAction" />
    </dxg:GridControl.View>
</dxg:GridControl> 

C#

private void GetIsEditorActivationAction(object sender, DevExpress.Xpf.Grid.GetIsEditorActivationActionEventArgs e) {
    if (e.ActivationAction == ActivationAction.MouseLeftButtonDown)
        e.IsActivationAction = false;
}

VB.NET

Private Sub GetIsEditorActivationAction(ByVal sender As Object, ByVal e As DevExpress.Xpf.Grid.GetIsEditorActivationActionEventArgs)
    If e.ActivationAction = ActivationAction.MouseLeftButton Then e.IsActivationAction = False
End Sub

Process End User Actions

The GridControl provides the following events to process end user actions:

Event	Description
DataViewBase.GetIsEditorActivationAction	Allows you to specify whether an action (key down, text input, or mouse left button click) activates the focused editor.
DataViewBase.ProcessEditorActivationAction	Allows you to make the focused editor process an activation action.
DataViewBase.GetActiveEditorNeedsKey	Allows you to specify whether an active editor responds to keys that a user presses.