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>
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package layout
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import (
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"slices"
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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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// Masonry puts each item in the shortest of n columns.
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func Masonry(c *ui.Context, columns int, items []func()) ui.Element {
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if columns < 1 {
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panic("layout: Masonry needs a column")
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}
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gap := c.Theme().Space(3)
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root := ui.Box(c).FillWidth()
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w := root.LayoutBounds().W
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colW := max(0, (w-gap*float32(columns-1))/float32(columns))
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used, boxes, sum := make([]float32, len(items)), make([]ui.Element, len(items)), make([]float32, columns)
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root.Children(func() {
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for i, item := range items {
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b := ui.Box(c).Key(i).Absolute().Width(colW).Transition(ui.ElementTransition{Position: true})
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used[i] = b.LayoutBounds().H
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j := slices.Index(sum, slices.Min(sum))
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b.Left(float32(j) * (colW + gap)).Top(sum[j]).Children(item)
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sum[j] += used[i] + gap
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boxes[i] = b
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}
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})
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if len(items) > 0 {
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root.Height(slices.Max(sum) - gap)
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}
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kit.Settle(c, root, append(used, w), func() []float32 {
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h := make([]float32, 0, len(boxes)+1)
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for _, b := range boxes {
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h = append(h, b.LayoutBounds().H)
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}
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return append(h, root.LayoutBounds().W)
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})
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return root
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}
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