Class KeyboardSelectionHandler

This class handles the selection from the keyboard.

Inheritance
System.Object
KeyboardSelectionHandler
Namespace: Telerik.Windows.Documents.Selection
Assembly: Telerik.Windows.Controls.RichTextBox.dll

Syntax

public class KeyboardSelectionHandler : Object

Constructors

KeyboardSelectionHandler(RadDocument)

Initializes a new instance of the KeyboardSelectionHandler class.

Declaration
public KeyboardSelectionHandler(RadDocument document)
Parameters
RadDocument document

The current document.

Properties

Document

Gets the current document.

Declaration
protected RadDocument Document { get; }
Property Value
RadDocument

LastCaretPosition

Gets the caret position when starting the selection.

Declaration
protected DocumentPosition LastCaretPosition { get; }
Property Value
DocumentPosition

Methods

ExpandDownLeft(DocumentPosition)

Expands the selection downwards and to the left from the specified document position.

Declaration
public virtual DocumentPosition ExpandDownLeft(DocumentPosition currentPosition)
Parameters
DocumentPosition currentPosition

The starting position from which to expand the selection.
Returns
DocumentPosition

Returns the new selection position after expanding.

ExpandTopRight(DocumentPosition)

Expands the selection to the top right from the specified document position.

Declaration
public virtual DocumentPosition ExpandTopRight(DocumentPosition currentPosition)
Parameters
DocumentPosition currentPosition

The starting document position from which to expand the selection.
Returns
DocumentPosition

Returns a boolean indicating whether the selection was successfully expanded.

UpdateSelection(MoveCaretDirections)

This method updates the selected range when the caret is moved by pressing shift and the arrow keys.

Declaration
public virtual void UpdateSelection(MoveCaretDirections direction)
Parameters
MoveCaretDirections direction

The current movement direction of the caret.

Extension Methods