IUIAnimationStoryboard::AddTransitionAtKeyframe method (uianimation.h)
Adds a transition that starts at the specified keyframe.
Syntax
HRESULT AddTransitionAtKeyframe(
[in] IUIAnimationVariable *variable,
[in] IUIAnimationTransition *transition,
[in] UI_ANIMATION_KEYFRAME startKeyframe
);
Parameters
[in] variable
The animation variable for which a transition is to be added.
[in] transition
The transition to be added.
[in] startKeyframe
The keyframe that specifies the beginning of the new 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.
| Return code | Description |
|---|---|
|
This transition has already been added to a storyboard or has been added to a storyboard that has finished playing and been released. |
|
The transition might eclipse the beginning of another transition in the storyboard. |
Remarks
Transitions must be added in the order in which they will be played. A transition may begin playing before the preceding transition in the storyboard has finished, in which case the initial value and velocity seen by the new transition is determined by the state of the preceding one. A transition should not begin before the start of the preceding transition.
A keyframe represents a moment in time within a storyboard and can be used to specify the start and end times of transitions. Because keyframes can be added at the ends of transitions, their offsets from the start of the storyboard may not be known until the storyboard is playing.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7, Windows Vista and Platform Update for Windows Vista [desktop apps | UWP apps] |
| Minimum supported server | None supported |
| Target Platform | Windows |
| Header | uianimation.h |
| DLL | UIAnimation.dll |
See also
IUIAnimationStoryboard::AddKeyframeAfterTransition
IUIAnimationStoryboard::AddKeyframeAtOffset
IUIAnimationStoryboard::AddTransition