Documentation

Class GestureRecognizerBase

A specific gesture recognizer. The inheritors of this class should handle the basic touch events and translate them to specific gesture related events. A recognizer can be responsible for a family of gestures (for example Tap, TapAndHold, TapHoldAndRelease). A recognizer can be responsible for a family of events (for example SwipeStarted, Swipe, SwipeFinished).

Inheritance
System.Object
GestureRecognizerBase
DragGestureRecognizer
PinchGestureRecognizer
SwipeGestureRecognizer
TapGestureRecognizer
Namespace: Telerik.Windows.Input.Touch
Assembly: Telerik.Windows.Controls.dll

Syntax

public abstract class GestureRecognizerBase : Object

Constructors

GestureRecognizerBase(UIElement)

Initializes a new instance of the GestureRecognizerBase class.

Declaration
protected GestureRecognizerBase(UIElement element)
Parameters
System.Windows.UIElement element

Properties

Element

The element this recognizer is assigned to.

Declaration
public UIElement Element { get; }
Property Value
System.Windows.UIElement

HasGestureHandlers

Gets or sets a value indicating whether there are any attached handlers for the specific gesture.

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

Methods

OnCeaseGesturesRequested()

When this method is called, any gestures activated by this recognizer should be ceased. This method is invoked when the CeaseGestures method of the TouchManager is called with an argument either null or a root of the element this recognizer is assigned to.

Declaration
public virtual void OnCeaseGesturesRequested()

OnTouchDown(GestureRecognizerEventArgs)

Invoked when a TouchDown occurs inside this element.

Declaration
public abstract void OnTouchDown(GestureRecognizerEventArgs args)
Parameters
GestureRecognizerEventArgs args

OnTouchEnter(GestureRecognizerEventArgs)

Invoked when a TouchEnter occurs inside this element.

Declaration
public abstract void OnTouchEnter(GestureRecognizerEventArgs args)
Parameters
GestureRecognizerEventArgs args

OnTouchLeave(GestureRecognizerEventArgs)

Invoked when a TouchLeave occurs inside this element.

Declaration
public abstract void OnTouchLeave(GestureRecognizerEventArgs args)
Parameters
GestureRecognizerEventArgs args

OnTouchMove(GestureRecognizerEventArgs)

Invoked when a TouchMove occurs inside this element.

Declaration
public abstract void OnTouchMove(GestureRecognizerEventArgs args)
Parameters
GestureRecognizerEventArgs args

OnTouchUp(GestureRecognizerEventArgs)

Invoked when a TouchUp occurs inside this element.

Declaration
public abstract void OnTouchUp(GestureRecognizerEventArgs args)
Parameters
GestureRecognizerEventArgs args

Extension Methods