Scenes

scroll-fade

Builds ScrollArea ScrollFade

The code that drew it

A still frame holds a repeating animation at its first frame and a one-shot at its last, because a still of a moving thing is not reproducible. Run the gallery to review motion.

fn scroll_fade(_window: &mut Window, cx: &mut App) -> AnyElement {
    let theme = cx.theme().clone();
    crate::layout::scroll_to("scene.fade.output", gpui::point(px(0.0), px(120.0)), cx);
    stack(&theme)
        .w(px(480.0))
        .child(caption(&theme, "Scrolled: content runs past both ends"))
        .child(
            div()
                .hairline(&theme)
                .radius(&theme, Radius::Card)
                .overflow_hidden()
                .child(
                    ScrollFade::new("scene.fade.scrolled")
                        .edges(FadeEdges::vertical())
                        .fit_height()
                        .child(
                            ScrollArea::new("scene.fade.output")
                                .label("Run output")
                                .vertical()
                                .height(200.0)
                                .child(filler(&theme, "Output", 20)),
                        ),
                ),
        )
        // Nothing is hidden here, so no edge fades and the caller says so.
        .child(caption(&theme, "Nothing hidden: no edge fades"))
        .child(
            div()
                .hairline(&theme)
                .radius(&theme, Radius::Card)
                .overflow_hidden()
                .child(
                    ScrollFade::new("scene.fade.settled").fit_height().child(
                        ScrollArea::new("scene.fade.summary")
                            .label("Summary")
                            .vertical()
                            .height(120.0)
                            .child(filler(&theme, "Summary", 2)),
                    ),
                ),
        )
        .into_any_element()
}