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

feedback/levelup.go

@@ -0,0 +1,60 @@
+package feedback
+
+import (
+	"strconv"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/icon"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type LevelUpOptions struct{}
+
+type levelKey struct{}
+
+// rise is the last level seen, and when it rose.
+type rise struct {
+	level int
+	at    time.Time
+}
+
+// LevelUp slides in LEVEL UP! with sparkles when level rises.
+func LevelUp(c *ui.Context, level int, o LevelUpOptions) *ui.Element {
+	k := pixel.K(c)
+	e := ui.Box(c)
+	s := ui.Local(e, levelKey{}, func() rise { return rise{level: level} })
+	if level > s.level {
+		s.at = k.Now()
+	}
+	s.level = level
+	// Ten steps a second: six slide in, twenty stay.
+	step := since(c, k, s.at, 10, 26)
+	if step >= 26 {
+		return e
+	}
+	slide := 5 - min(step, 5)
+	if k.Reduce() {
+		slide = 0
+	}
+	title := k.Msg("level_up") + " LV " + strconv.Itoa(level)
+	w := pixel.Measure(title)*2 + 24
+	return e.Role(ui.RoleStatus).Label(title).Size(k.D(w), k.D(40)).Draw(func(p *ui.Painter, r ui.Rect) {
+		g := k.Canvas(p, r)
+		x := -slide * w / 5
+		g.Clip(0, 0, g.W, g.H, func() {
+			g.Frame(x, 4, w, 32, pixel.Window, pixel.Accent)
+			g.Text(x+13, 5, title, pixel.Shade, 2)
+			g.Text(x+12, 4, title, pixel.AccentInk, 2)
+		})
+		if slide > 0 {
+			return
+		}
+		for i, at := range [][2]int{{2, 0}, {w - 14, 2}, {w / 2, 28}, {8, 26}} {
+			if (g.Step(8)+i)%3 != 0 {
+				g.Sprite(at[0], at[1], icon.Sparkle, 0, pixel.Warn, 1)
+			}
+		}
+	})
+}