Add navigation components 131-150; pixel Pad, Finish, Park, Since

navigation/sidebar.go

@@ -0,0 +1,88 @@
+package navigation
+
+import (
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type SidebarItem struct {
+	Icon  *pixel.Sprite
+	Label string
+	// Badge is a short count or word at the right.
+	Badge string
+}
+
+type SidebarSection struct {
+	Title string
+	Items []SidebarItem
+}
+
+type SidebarOptions struct {
+	// Width is in dots; zero means 140.
+	Width    int
+	Disabled bool
+}
+
+type SidebarResult struct {
+	Element *ui.Element
+	Changed bool
+}
+
+// Sidebar lists sections of items; Up and Down choose.
+func Sidebar(c *ui.Context, text string, sections []SidebarSection, selected *int, o SidebarOptions) SidebarResult {
+	k := pixel.K(c)
+	w := pixel.Or("Sidebar Width", o.Width, 140)
+	res := SidebarResult{}
+	n := 0
+	res.Element = ui.RadioGroup(c, func() {
+		for _, sec := range sections {
+			if sec.Title != "" {
+				pixel.Text(c, sec.Title, pixel.TextOptions{Slot: pixel.Faint})
+			}
+			for _, it := range sec.Items {
+				i := n
+				n++
+				shell, base, st := pixel.Shell(c, func() *ui.Element {
+					return ui.RadioBase(c, selected, i).Label(it.Label).Disabled(o.Disabled)
+				})
+				if base.Changed() {
+					res.Changed = true
+				}
+				shell.Size(k.D(w), k.D(pixel.LineHeight+2)).Draw(func(p *ui.Painter, r ui.Rect) {
+					entry(k.Canvas(p, r), it, i == *selected, st)
+				})
+			}
+		}
+	}).Gap(k.D(1)).Label(text)
+	if res.Changed {
+		slog.Debug("8bit: sidebar", "label", text, "selected", *selected)
+	}
+	return res
+}
+
+// entry draws a sidebar row: icon, label, badge.
+func entry(g pixel.Canvas, it SidebarItem, on bool, st pixel.State) {
+	ink := pixel.Ink
+	switch {
+	case on:
+		g.Rect(0, 0, g.W, g.H, pixel.Accent)
+		ink = pixel.AccentInk
+	case st.Hover:
+		g.Rect(0, 0, g.W, g.H, pixel.Lit)
+	}
+	x := 4
+	if it.Icon != nil {
+		g.Sprite(x, (g.H-it.Icon.H)/2, it.Icon, 0, ink, 1)
+		x += it.Icon.W + 4
+	}
+	g.Text(x, 1, it.Label, ink, 1)
+	if it.Badge != "" {
+		bw := pixel.Measure(it.Badge) + 6
+		g.Frame(g.W-bw-3, 2, bw, g.H-4, pixel.Notched, pixel.Bad)
+		g.Text(g.W-bw, 1, it.Badge, pixel.AccentInk, 1)
+	}
+	g.Finish(st)
+}