Class SelectionHelper

Represents a helper class which is used for selection.

Inheritance
System.Object
SelectionHelper
Namespace: Telerik.Windows.Controls.Primitives
Assembly: Telerik.Windows.Controls.dll

Syntax

public class SelectionHelper : Object

Constructors

SelectionHelper(Func<Boolean>, ISelectorInteraction, ISelectionBehavior, Action<Object, SelectionChangedEventArgs>)

Initializes a new instance of the SelectionHelper class.

Declaration
public SelectionHelper(Func<bool> canExecute, ISelectorInteraction selector, ISelectionBehavior behavior, Action<object, SelectionChangedEventArgs> selectionCallBack)
Parameters
System.Func<System.Boolean> canExecute

ISelectorInteraction selector

ISelectionBehavior behavior

System.Action<System.Object, SelectionChangedEventArgs> selectionCallBack

SelectionHelper(ISelectorInteraction, ISelectionBehavior, Action<Object, SelectionChangedEventArgs>)

Initializes a new instance of the SelectionHelper class.

Declaration
public SelectionHelper(ISelectorInteraction selector, ISelectionBehavior behavior, Action<object, SelectionChangedEventArgs> selectionCallBack)
Parameters
ISelectorInteraction selector

ISelectionBehavior behavior

System.Action<System.Object, SelectionChangedEventArgs> selectionCallBack

Properties

IsActive

Gets a value indicating whether the selection is active.

Declaration
public bool IsActive { get; }
Property Value
System.Boolean

SelectedIndex

Gets the index of the selected item.

Declaration
public int SelectedIndex { get; }
Property Value
System.Int32

SelectedItem

Gets the selected item.

Declaration
public object SelectedItem { get; }
Property Value
System.Object

Methods

AddToSelection(IEnumerable)

Adds items to selection.

Declaration
public void AddToSelection(IEnumerable items)
Parameters
System.Collections.IEnumerable items

ClearSelection()

Clears the selection.

Declaration
public void ClearSelection()

DeselectItems(IEnumerable)

UnSelects the items.

Declaration
public void DeselectItems(IEnumerable items)
Parameters
System.Collections.IEnumerable items

GetSelectedItems()

Gets the selected items.

Declaration
public IList GetSelectedItems()
Returns
System.Collections.IList

ResumeExecution()

Tries to execute all enqueued selection actions.

Declaration
public bool ResumeExecution()
Returns
System.Boolean

Returns true if the actions can be executed, otherwise returns false.

SelectItems(IEnumerable)

Selects the items.

Declaration
public void SelectItems(IEnumerable items)
Parameters
System.Collections.IEnumerable items

UpdateSelection(UIElement, Boolean)

Updates the selection using the container and the current selected state.

Declaration
public void UpdateSelection(UIElement container, bool isSelected)
Parameters
System.Windows.UIElement container

System.Boolean isSelected

UpdateSelectionBehavior(ISelectionBehavior)

Updates the selection behavior.

Declaration
public void UpdateSelectionBehavior(ISelectionBehavior behavior)
Parameters
ISelectionBehavior behavior

UpdateSelectionOnUserInteraction(Object, SelectionMouseState)

Updates the selection on user interaction. The second SelectionMouseState parameter is optional. By default is SelectionMouseState.Left.

Declaration
public void UpdateSelectionOnUserInteraction(object item, SelectionMouseState mouseState)
Parameters
System.Object item

The data item or the container that was affected by the UI selection operation.
SelectionMouseState mouseState

Indicates which mouse button was used to perform the operations.

Extension Methods