Add display components 041-065; move Icon into display; QR via rsc.io/qr

display/avatar.go

@@ -0,0 +1,149 @@
+package display
+
+import (
+	"hash/fnv"
+	"image"
+	"strings"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+var (
+	head = pixel.MustSprite(`
+		................
+		................
+		................
+		....eeeeeeee....
+		...e########e...
+		..e##########e..
+		..e##########e..
+		..e##########e..
+		..e##########e..
+		..e##########e..
+		..e##########e..
+		..e##########e..
+		...e########e...
+		....e######e....
+		.....eeeeee.....
+		................
+	`)
+	hair = []*pixel.Sprite{pixel.MustSprite(`
+		................
+		................
+		....########....
+		...##########...
+		..############..
+		..##........##..
+		..#..........#..
+	`), pixel.MustSprite(`
+		................
+		....#.#..#.#....
+		...##########...
+		..############..
+		..###.####.###..
+		..#..........#..
+	`), pixel.MustSprite(`
+		................
+		................
+		....########....
+		...##########...
+		..############..
+		..###......###..
+		..##........##..
+		..##........##..
+		..##........##..
+		..##........##..
+		..##........##..
+		...#........#...
+	`)}
+	eyes = []*pixel.Sprite{pixel.MustSprite(`
+		.....#....#.....
+		.....#....#.....
+	`), pixel.MustSprite(`
+		....##....##....
+		................
+	`), pixel.MustSprite(`
+		....#.#..#.#....
+		.....#....#.....
+	`)}
+	mouths = []*pixel.Sprite{pixel.MustSprite(`
+		......#..#......
+		.......##.......
+	`), pixel.MustSprite(`
+		................
+		......####......
+	`), pixel.MustSprite(`
+		.......##.......
+		.......##.......
+	`)}
+	backs  = []pixel.Slot{pixel.Info, pixel.Good, pixel.Magic, pixel.Warn, pixel.AccentLit, pixel.Accent}
+	skins  = []pixel.Slot{pixel.Lit, pixel.Face, pixel.Shade, pixel.Well}
+	colors = []pixel.Slot{pixel.Ink, pixel.Edge, pixel.Bad, pixel.Warn, pixel.Magic, pixel.Faint, pixel.Info}
+)
+
+type AvatarOptions struct {
+	Scale int
+	// Picture replaces the drawn face.
+	Picture image.Image
+}
+
+// Avatar draws a face seeded by name, or a picture.
+func Avatar(c *ui.Context, name string, o AvatarOptions) *ui.Element {
+	k, sc := pixel.K(c), scale(o.Scale)
+	if o.Picture != nil {
+		return Picture(c, o.Picture, PictureOptions{W: 16 * sc, H: 16 * sc, Label: name})
+	}
+	return art(c, k, name, 16*sc, 16*sc, func(g pixel.Canvas) { drawFace(g, 0, name, sc) })
+}
+
+// drawFace paints the face of name at x, scaled.
+func drawFace(g pixel.Canvas, x int, name string, sc int) {
+	h := fnv.New32a()
+	h.Write([]byte(strings.ToLower(name)))
+	n := h.Sum32()
+	pick := func(k int) int { v := int(n % uint32(k)); n /= uint32(k); return v }
+	g.Rect(x, 0, 16*sc, 16*sc, backs[pick(len(backs))])
+	g.Sprite(x, 0, head, 0, skins[pick(len(skins))], sc)
+	g.Sprite(x, 0, hair[pick(len(hair))], 0, colors[pick(len(colors))], sc)
+	g.Sprite(x, 8*sc, eyes[pick(len(eyes))], 0, pixel.Ink, sc)
+	g.Sprite(x, 11*sc, mouths[pick(len(mouths))], 0, pixel.Ink, sc)
+}
+
+type AvatarGroupOptions struct {
+	// Max faces shown before +N; zero means 4.
+	Max   int
+	Scale int
+}
+
+// AvatarGroup overlaps faces and counts the rest in a chip.
+func AvatarGroup(c *ui.Context, names []string, o AvatarGroupOptions) *ui.Element {
+	k, sc := pixel.K(c), scale(o.Scale)
+	shown := names[:min(len(names), orDef("AvatarGroup Max", o.Max, 4))]
+	rest := len(names) - len(shown)
+	more := ""
+	if rest > 0 {
+		more = "+" + itoa(rest)
+	}
+	step := 12 * sc
+	w := max(0, len(shown)-1)*step + 16*sc
+	if more != "" {
+		w += pixel.MicroWidth(more) + 8
+	}
+	return art(c, k, strings.Join(names, ", "), w, 16*sc, func(g pixel.Canvas) {
+		for i, name := range shown {
+			x := i * step
+			drawFace(g, x, name, sc)
+			if i > 0 {
+				g.VLine(x, 0, 16*sc, pixel.Back)
+			}
+		}
+		if more != "" {
+			x := len(shown)*step + 4*sc
+			cw := pixel.MicroWidth(more) + 4
+			g.Frame(x, (16*sc-9)/2, cw, 9, pixel.Notched, pixel.Face)
+			g.Micro(x+2, (16*sc-9)/2+2, more, pixel.Ink, 1)
+		}
+	})
+}