IDirectManipulationViewportEventHandler interface (directmanipulation.h)

Defines methods for handling status and update events for the viewport.

Note  When implementing a Direct Manipulation object, ensure that the IUnknown implementation supports multithreading through thread-safe reference counting. For more information, see InterlockedIncrement and InterlockedDecrement.

 

Inheritance

The IDirectManipulationViewportEventHandler interface inherits from the IUnknown interface. IDirectManipulationViewportEventHandler also has these types of members:

Methods

The IDirectManipulationViewportEventHandler interface has these methods.

IDirectManipulationViewportEventHandler::OnContentUpdated Called when content inside a viewport is updated.
IDirectManipulationViewportEventHandler::OnViewportStatusChanged Called when the status of a viewport changes.
IDirectManipulationViewportEventHandler::OnViewportUpdated Called after all content in the viewport has been updated.

Remarks

Client apps implement this handler to receive status and update events for viewports. Use AddEventHandler to set the handler for a viewport. Each viewport can have more than one handler.

Requirements

Requirement	Value
Minimum supported client	Windows 8 [desktop apps only]
Minimum supported server	Windows Server 2012 [desktop apps only]
Target Platform	Windows
Header	directmanipulation.h

See also

Direct Manipulation Interfaces