ZacharyZhang-NYandClaude Opus 5.5
4efaf2680f
Stack through StickyHeader, with behavior tests and gallery demos. kit gains Arrive, Settle (paint-time layout check) and Shade. Several actions return named ui.Element results; mygo vet forbids elements in structs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
32 lines
981 B
Go
32 lines
981 B
Go
package layout
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import (
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"git.zacharyzhang.com/ZacharyZhang-NY/CrychicUI/kit"
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"github.com/egoist/mygo/ui"
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)
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// ScrollArea scrolls content; edge shadows fade with the offset.
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func ScrollArea(c *ui.Context, content func()) ui.Element {
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root := ui.Box(c).Clip()
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st := ui.Local(root, "scroll", func() ui.ScrollState { return ui.ScrollState{} })
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kit.Settle(c, root, []float32{st.Y, st.MaxY}, func() []float32 { return []float32{st.Y, st.MaxY} })
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return root.Children(func() {
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ui.Scroll(c).Fill().TrackScroll(st).Children(content)
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edge := func(key string, show bool, angle float32) {
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e := ui.Box(c).Key(key).PassThrough().Absolute().Left(0).Right(0).Height(c.Theme().Space(3))
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target := float32(0)
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if show {
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target = 1
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}
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e.Gradient(kit.Shade(0.12), kit.Shade(0), angle).Opacity(e.AnimateTo("o", target, ui.Snappy))
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if key == "top" {
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e.Top(0)
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} else {
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e.Bottom(0)
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}
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}
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edge("top", st.Y > 0, 180)
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edge("bottom", st.Y < st.MaxY, 0)
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})
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}
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