IUIAnimationInterpolator::GetDuration method (uianimation.h)

Gets the duration of a transition.

Syntax

HRESULT GetDuration(
  [out] UI_ANIMATION_SECONDS *duration
);

Parameters

[out] duration

The duration of the transition.

Return value

If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. See Windows Animation Error Codes for a list of error codes.

Remarks

Windows Animation always calls the SetInitialValueAndVelocity method to set the initial value and velocity before calling GetDuration, so a custom interpolator need not check whether the initial value and velocity have been set.

Windows Animation can call SetInitialValueAndVelocity multiple times with different parameters. Interpolators can cache internal state to improve performance, but they must update this cached state each time SetInitialValueAndVelocity is called and ensure that the results of subsequent calls to GetDuration reflect the updated state.

Requirements

See also

IUIAnimationInterpolator

UI_ANIMATION_SECONDS