Add data components 151-175; clear MyGo row highlights

Lists, tables, trees, grids, inventories and records in data/.
Outline and GridView build on ui.List: ui.Outline strokes its arrows
and ui.GridView spaces and tints items. The pixel theme keeps MyGo's
row highlights clear so scrolled rows stay on whole dots; off lists
take a veil against the wheel. Adds Canvas.Silhouette, SwitchOptions
Label and exports Rarity.Slot.

data/matrix.go

@@ -0,0 +1,96 @@
+package data
+
+import (
+	"fmt"
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type MatrixOptions struct {
+	Disabled bool
+}
+
+type MatrixResult struct {
+	Element *ui.Element
+	Changed bool
+}
+
+type matrixKey struct{}
+
+// Matrix toggles cells under row and column headers.
+func Matrix(c *ui.Context, text string, rows, cols []string, on [][]bool, o MatrixOptions) MatrixResult {
+	k := pixel.K(c)
+	if len(on) != len(rows) {
+		panic(fmt.Sprintf("data: Matrix has %d rows, %d of values", len(rows), len(on)))
+	}
+	cw, rw, ch := 14, 0, pixel.LineHeight+2
+	for _, l := range cols {
+		cw = max(cw, pixel.Measure(l)+6)
+	}
+	for i, l := range rows {
+		rw = max(rw, pixel.Measure(l)+6)
+		if len(on[i]) != len(cols) {
+			panic(fmt.Sprintf("data: Matrix row %q has %d values, not %d", l, len(on[i]), len(cols)))
+		}
+	}
+	box := ui.Column(c)
+	cur := ui.Local(box, matrixKey{}, func() int { return 0 })
+	res := MatrixResult{Element: box}
+	head := func(l string, w, h int) {
+		ui.Box(c).Size(k.D(w), k.D(h)).Role(ui.RoleText).Label(l).Draw(func(p *ui.Painter, r ui.Rect) {
+			g := k.Canvas(p, r)
+			g.Text((g.W-pixel.Measure(l))/2, (g.H-pixel.LineHeight)/2, l, pixel.Faint, 1)
+		})
+	}
+	box.Children(func() {
+		ui.Row(c).Padding(0, 0, 0, k.D(rw)).Children(func() {
+			for _, l := range cols {
+				head(l, cw, pixel.LineHeight)
+			}
+		})
+		ui.Row(c).Children(func() {
+			ui.Column(c).Children(func() {
+				for _, l := range rows {
+					head(l, rw, ch)
+				}
+			})
+			n := len(cols)
+			*cur = max(0, min(*cur, len(rows)*n-1))
+			shell, base, st, picked := pixel.Pad(c, text, n, len(rows)*n, cw, ch, cur, o.Disabled)
+			if picked >= 0 {
+				on[picked/n][picked%n] = !on[picked/n][picked%n]
+				res.Changed = true
+			}
+			if *cur < len(rows)*n {
+				r, cl, state := *cur/n, *cur%n, "off"
+				if on[r][cl] {
+					state = "on"
+				}
+				base.Description(rows[r] + " " + cols[cl] + " " + k.Msg(state))
+			}
+			shell.Draw(func(p *ui.Painter, rc ui.Rect) {
+				g := k.Canvas(p, rc)
+				for r := range rows {
+					for cl := range cols {
+						x, y := cl*cw, r*ch
+						if st.Focus && r*n+cl == *cur {
+							g.Cursor(x, y, cw, ch)
+						}
+						g.Frame(x+(cw-8)/2, y+(ch-8)/2, 8, 8, pixel.Sunken, pixel.Well)
+						if on[r][cl] {
+							g.Rect(x+(cw-8)/2+2, y+(ch-8)/2+2, 4, 4, pixel.Accent)
+						}
+					}
+				}
+				g.Finish(st)
+			})
+		})
+	})
+	if res.Changed {
+		slog.Debug("8bit: matrix", "label", text, "cell", *cur)
+	}
+	return res
+}