Add navigation components 131-150; pixel Pad, Finish, Park, Since

navigation/steps.go

@@ -0,0 +1,78 @@
+package navigation
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/icon"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+// waving is a flag in two frames of wind.
+var waving = pixel.MustSprite(`
+	.#..........
+	.#######....
+	.########...
+	.#########..
+	.########...
+	.#######....
+	.#..........
+	.#..........
+	.#..........
+	.#..........
+
+	.#..........
+	.##.#####...
+	.#########..
+	.#########..
+	.##########.
+	.##.#####...
+	.#..........
+	.#..........
+	.#..........
+	.#..........
+`)
+
+type StepsOptions struct{}
+
+// Steps are flags on a path: done, waving, then locked.
+func Steps(c *ui.Context, labels []string, current int, o StepsOptions) *ui.Element {
+	k := pixel.K(c)
+	if current < 0 || current >= len(labels) {
+		panic(fmt.Sprintf("navigation: step %d of %d", current, len(labels)))
+	}
+	ws, total := make([]int, len(labels)), 0
+	for i, l := range labels {
+		ws[i] = max(pixel.Measure(l), 12) + 16
+		total += ws[i]
+	}
+	return ui.Box(c).Role(ui.RoleList).Label(strings.Join(labels, ", ")).Description(fmt.Sprintf("%d/%d", current+1, len(labels))).
+		Size(k.D(total), k.D(14+pixel.LineHeight)).Draw(func(p *ui.Painter, r ui.Rect) {
+		g := k.Canvas(p, r)
+		x := 0
+		for i, l := range labels {
+			mid := x + ws[i]/2
+			if i > 0 {
+				for d := x - ws[i-1]/2 + 10; d < mid-8; d += 3 {
+					g.Dot(d, 6, pixel.Faint)
+				}
+			}
+			switch {
+			case i < current:
+				g.Sprite(mid-6, 0, waving, 0, pixel.Good, 1)
+			case i == current:
+				g.Sprite(mid-6, 0, waving, g.Step(4)%2, pixel.Accent, 1)
+			default:
+				g.Sprite(mid-6, 0, icon.Lock, 0, pixel.Faint, 1)
+			}
+			ink := pixel.Faint
+			if i <= current {
+				ink = pixel.Ink
+			}
+			g.Text(mid-pixel.Measure(l)/2, 14, l, ink, 1)
+			x += ws[i]
+		}
+	})
+}