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InteractiveService Class

Summary

Defines the service to translate mouse and tap events to common user interface interactions.

Syntax

Java

Objective-C

WinRT C#

public class InteractiveService

Public Class InteractiveService

public sealed class InteractiveService

iOS: 
@interface LTInteractiveService : NSObject <LTBasicGestureRecognizerDelegate> 
macOS: 
@interface LTInteractiveService : NSObject

public class InteractiveService

function Leadtools.Controls.InteractiveService()

Remarks

The InteractiveService object hooks to the target framework element TargetElement and starts listening to the events like tap, drag, hold, double tap and drag events.

ImageViewer contains an instance of InteractiveService internally (accessible through the ImageViewer.InteractiveService property) and use it along with the ImageViewerInteractiveMode classes to perform rich interactive user interface interactions such as zoom, pan, scale, rubber banding and magnify glass.

To use the InteractiveService, call the InteractiveService Constructor(FrameworkElement,FrameworkElement) constructor. The events of the target framework element will be subscribed to and converted from raw mouse and tap to the common events mentioned above. All coordinates will be translated based on its position.

InteractiveService contains the following members:

Members	Description
Owner	The owner of the service. This is not used by InteractiveService but can be used by the application to pass any class and extra data. ImageViewer passes `this` for this parameter in the InteractiveService Constructor(FrameworkElement,FrameworkElement) constructor.
TargetElement	The target element.
StartListening, StopListening and IsListening	Subscribe/Unsubscribe to the events
Tap, DoubleTap, Hold, DragStarted, DragDelta and DragCompleted	Uniform events for common user interface interaction regardless of the event source (mouse or touch)

InteractiveService will subscribe to multiple Windows Runtime events. It is recommended if you create an instance of this object to call Dispose on it when you are done to free the resources used.

Requirements

Target Platforms

See Also