ui::TransitionStoryboard¶

Header: winui/ui/Animation.hpp.

The storyboard a theme or navigation transition builds for one element: key-framed tracks over its TransitionTargetState, started delay late (a stagger), scaling about scale_origin. When it ends the transition target goes back to identity.

Example:

// A custom "nudge": slide 12 DIPs right and back over 200 ms.
auto                     element = std::make_unique<ui::RectangleControl>();
ui::TransitionStoryboard nudge;
nudge.tracks.push_back({ui::TransitionChannel::TranslateX,
                        {ui::KeyFrame::linear(0ms, 0.0f), ui::KeyFrame::linear(100ms, 12.0f),
                         ui::KeyFrame::linear(200ms, 0.0f)}});
element->run_transition(std::move(nudge), [] { /* back at rest */ });

// Or one of the stock ones:
element->run_transition(ui::transition_storyboards::popup_in(ui::Point{0.0f, 40.0f}));

tracks¶

std::vector<TransitionTrack> tracks {}

The key-framed tracks.

delay¶

Duration delay {}

Start delay (a stagger).

scale_origin¶

Point scale_origin {0.5f, 0.5f}

Scale origin as a fraction of the size.

duration¶

Duration duration() const

Total length: the delay plus the longest track.

empty¶

bool empty() const

True when there is nothing to play (no tracks), e.g. for NoPageTransition.