Add feedback components 106-130; inert scope, focus return, two-step deploy

feedback/readygo.go

@@ -0,0 +1,62 @@
+package feedback
+
+import (
+	"log/slog"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type ReadyGoOptions struct {
+	// Cue starts the count each time it changes.
+	Cue int
+}
+
+type ReadyGoResult struct {
+	Element *ui.Element
+	// Done comes once, as GO! shows.
+	Done bool
+}
+
+type goKey struct{}
+
+// ready is a count's cue, start, and Done flag.
+type ready struct {
+	n    int
+	at   time.Time
+	said bool
+}
+
+// ReadyGo counts 3, 2, 1, GO! in big digits.
+func ReadyGo(c *ui.Context, o ReadyGoOptions) ReadyGoResult {
+	k := pixel.K(c)
+	e := ui.Box(c)
+	s := ui.Local(e, goKey{}, func() ready { return ready{n: o.Cue} })
+	if s.n != o.Cue {
+		*s = ready{n: o.Cue, at: k.Now()}
+	}
+	res := ReadyGoResult{Element: e}
+	sec := since(c, k, s.at, 10, 40) / 10
+	// Done comes once, even when time jumps past GO!.
+	if sec >= 3 && !s.said && !s.at.IsZero() {
+		s.said, res.Done = true, true
+		slog.Debug("8bit: ready go")
+	}
+	if sec >= 4 {
+		return res
+	}
+	word := [...]string{"3", "2", "1", k.Msg("go")}[sec]
+	e.Role(ui.RoleStatus).Label(word).Size(k.D(120), k.D(4*pixel.LineHeight)).Draw(func(p *ui.Painter, r ui.Rect) {
+		g := k.Canvas(p, r)
+		ink := pixel.Warn
+		if sec == 3 {
+			ink = pixel.Good
+		}
+		w := pixel.Measure(word) * 4
+		g.Text((g.W-w)/2+2, 2, word, pixel.Shade, 4)
+		g.Text((g.W-w)/2, 0, word, ink, 4)
+	})
+	return res
+}