Interface IDragEvents

Namespace

Icy.Input.Events

Assembly

IcyUI.dll

Represents an interface for the drag and drop related events.

public interface IDragEvents : IInputEventProvider, IUpdateableInput, IInitializable

Inherited Members

IInputEventProvider.InputSystem

IUpdateableInput.Update(TimeSpan)

IInitializable.IsInitialized

IInitializable.Initialize()

Extension Methods

PropertyReferencesExtensions.ContainsProperty(object, IPropertyReference)

Remarks

Usually, when player uses mouse for control, he can hold the pointer with left button pressed and then move it anywhere out of minimal drag distance. This will trigger drag event sequence:

• At the start of cursor movement out of range, the DragStarted event is raised.
• Whenever the pointer moves during the drag, the DragPerforming event is raised.
• When the pointer is released, the DragEnded event is raised. When the drag ends without a release (a second finger started a pinch, or the contact vanished), DragCanceled is raised instead.

Drags come from touch and the left mouse button, recognized by IGestureEvents. The Hold event is suppressed while dragging. However, the TouchDown and TouchUp events are performed anyway.

Events

DragCanceled

Occurs when a drag ends without being released - a second finger started a pinch, or the contact vanished. Handlers must undo the drag rather than complete it (no drop).

event EventHandler<GenericEventArgs<Point>>? DragCanceled

Event Type

EventHandler<GenericEventArgs<Point>>

DragEnded

Occurs when the drag sequence has been ended.

event EventHandler<GenericEventArgs<Point>>? DragEnded

Event Type

EventHandler<GenericEventArgs<Point>>

DragPerforming

Occurs when the pointer moves while the drag sequence is performing.

event EventHandler<GenericEventArgs<Point>>? DragPerforming

Event Type

EventHandler<GenericEventArgs<Point>>

DragStarted

Occurs when the drag sequence is started.

event EventHandler<AcceptableEventArgs<Point>>? DragStarted

Event Type

EventHandler<AcceptableEventArgs<Point>>