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

feedback/loaders.go

@@ -0,0 +1,43 @@
+package feedback
+
+import (
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type DotsLoaderOptions struct{}
+
+// DotsLoader bounces three dots in turn.
+func DotsLoader(c *ui.Context, text string, o DotsLoaderOptions) *ui.Element {
+	k := pixel.K(c)
+	return ui.Box(c).Role(ui.RoleProgress).Label(text).Size(k.D(18), k.D(8)).Draw(func(p *ui.Painter, r ui.Rect) {
+		g := k.Canvas(p, r)
+		up := g.Busy(6) % 4
+		for i := range 3 {
+			y, ink := 4, pixel.Faint
+			if i == up {
+				y, ink = 0, pixel.Accent
+			}
+			g.Rect(i*7, y, 4, 4, ink)
+		}
+	})
+}
+
+type BarsLoaderOptions struct{}
+
+// heights rise and fall; each bar runs a step behind.
+var heights = [8]int{3, 6, 9, 12, 9, 6, 3, 3}
+
+// BarsLoader raises and drops five bars.
+func BarsLoader(c *ui.Context, text string, o BarsLoaderOptions) *ui.Element {
+	k := pixel.K(c)
+	return ui.Box(c).Role(ui.RoleProgress).Label(text).Size(k.D(23), k.D(12)).Draw(func(p *ui.Painter, r ui.Rect) {
+		g := k.Canvas(p, r)
+		f := g.Busy(10)
+		for i := range 5 {
+			h := heights[(f+8-i)%8]
+			g.Rect(i*5, 12-h, 3, h, pixel.Accent)
+		}
+	})
+}