Merge branch 'main' into worktree-agent-ac0c9e7144c57cf07

internal/display.go

@@ -0,0 +1,27 @@
+package internal
+
+import (
+	"math"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+)
+
+// Fade animates e's background and border colors over d; zero skips it.
+func Fade(e *ui.Element, d time.Duration) *ui.Element {
+	if d > 0 {
+		e.Transition(ui.ElementTransition{Colors: true, Duration: d})
+	}
+	return e
+}
+
+// Rule draws a 1 DIP horizontal line from x0 to x1 at y, on device pixels.
+func Rule(p *ui.Painter, x0, x1, y float32, c ui.Color) {
+	s := float64(p.Scale())
+	px := math.Floor(float64(y) * s)
+	if int(math.Round(s))%2 == 1 {
+		px += 0.5
+	}
+	yy := float32(px / s)
+	p.Line(x0, yy, x1, yy, 1, c)
+}