WIP motion 1

bars_loader.go

@@ -0,0 +1,23 @@
+package mujica
+
+import (
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/internal"
+)
+
+// BarsLoader shows four bars rising and falling in turn.
+func BarsLoader(c *ui.Context, opts LoaderOptions) *ui.Element {
+	return loaderMark(c, opts, 1.25, 1000, func(p *ui.Painter, r ui.Rect, t float64, col ui.Color, still bool) {
+		w := r.W / 7
+		for i := range 4 {
+			h := float32(0.6)
+			if !still {
+				h = 0.3 + 0.7*loaderWave(t-float64(i)/8)
+			}
+			bh := internal.Snap(p, r.H*h)
+			x := r.X + float32(i)*w*2
+			p.Fill(ui.Rect{X: x, Y: internal.Snap(p, r.Y+(r.H-bh)/2), W: w, H: bh}, col, 1)
+		}
+	})
+}