Upgrade MyGo to v0.5.5

Elements are now pass-scoped value handles: tests that read bounds
after a frame bind a ui.Handle. pixel tells frames apart by the build
pass's root, since the Tester clock no longer moves on its own.

Fix the regressions the upgrade brought:
- Clipboard reads in input handlers go through c.Services().
- MyGo notes an overlay's opener after building it, so AutoFocus
  inside lost it; pixel.AutoFocus focuses through a Handle, and
  archtest bans the raw call. Dialogs hand the focus back again.
- Elements around a press stay hovered: Tooltip tells a press-given
  focus by focus arriving under the pointer.
- The web host moves the Tester clock with real time, at most 500 ms
  a call, and gives components the real clock.

The gallery's source index also accepts CRLF checkouts.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

navigation/backforward.go

@@ -15,7 +15,7 @@ type BackForwardOptions struct {
 }
 
 type BackForwardResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Moved reports a step through the history.
 	Moved bool
 }

navigation/bottomnav.go

@@ -13,7 +13,7 @@ type BottomNavOptions struct {
 }
 
 type BottomNavResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -25,7 +25,7 @@ func BottomNav(c *ui.Context, text string, items []NavItem, selected *int, o Bot
 	v := *selected
 	res.Element = ui.RadioGroup(c, func() {
 		for i, it := range items {
-			shell, _, st := pixel.Shell(c, func() *ui.Element {
+			shell, _, st := pixel.Shell(c, func() ui.Element {
 				return ui.RadioBase(c, &v, i).Label(it.Label).Disabled(o.Disabled)
 			})
 			w := max(pixel.Measure(it.Label), 12) + 12

navigation/breadcrumbs.go

@@ -13,7 +13,7 @@ type BreadcrumbsOptions struct {
 }
 
 type BreadcrumbsResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Clicked is the part clicked, or -1.
 	Clicked int
 }
@@ -28,7 +28,7 @@ func Breadcrumbs(c *ui.Context, text string, parts []string, o BreadcrumbsOption
 				pixel.Text(c, part, pixel.TextOptions{})
 				break
 			}
-			shell, base, st := pixel.Shell(c, func() *ui.Element {
+			shell, base, st := pixel.Shell(c, func() ui.Element {
 				return ui.ButtonBase(c).Role(ui.RoleLink).Label(part).Disabled(o.Disabled)
 			})
 			if base.Clicked() {

navigation/commandmenu.go

@@ -15,7 +15,7 @@ type CommandMenuOptions struct {
 }
 
 type CommandMenuResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Chosen is the item taken this frame, or -1.
 	Chosen   int
 	Canceled bool
@@ -26,12 +26,12 @@ type cursorKey struct{}
 // CommandMenu is a JRPG command window with a bobbing ▶.
 func CommandMenu(c *ui.Context, text string, items []MenuItem, o CommandMenuOptions) CommandMenuResult {
 	k := pixel.K(c)
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleList).Label(text).Disabled(o.Disabled)
 	})
 	// An off menu never takes the focus.
 	if o.AutoFocus && !base.IsDisabled() {
-		base.AutoFocus()
+		pixel.AutoFocus(c, base)
 	}
 	cur := ui.Local(base, cursorKey{}, func() int { return 0 })
 	res := CommandMenuResult{Element: shell, Chosen: -1}

navigation/commandpalette.go

@@ -15,7 +15,7 @@ type CommandPaletteOptions struct {
 }
 
 type CommandPaletteResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Ran is the command run this frame, or -1.
 	Ran int
 }
@@ -54,7 +54,7 @@ func CommandPalette(c *ui.Context, text string, commands []MenuItem, open *bool,
 			res.Ran, *open = i, false
 		}
 	}
-	res.Element = ui.DialogBase(c, open, func(back, panel *ui.Element) {
+	res.Element = ui.DialogBase(c, open, func(back, panel ui.Element) {
 		back.Draw(func(p *ui.Painter, r ui.Rect) {
 			g := k.Canvas(p, r)
 			g.Checker(0, 0, g.W, g.H, pixel.Back)
@@ -64,7 +64,7 @@ func CommandPalette(c *ui.Context, text string, commands []MenuItem, open *bool,
 			g.Frame(0, 0, g.W, g.H, pixel.Window, pixel.Face)
 		}).Children(func() {
 			f := input.TextInput(c, text, &st.query, input.TextInputOptions{Placeholder: "> …", Width: 228})
-			f.Input.AutoFocus()
+			pixel.AutoFocus(c, f.Input)
 			if f.Changed {
 				st.lit = 0
 			}

navigation/contextmenu.go

@@ -13,7 +13,7 @@ type ContextMenuOptions struct {
 }
 
 type ContextMenuResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Chosen is the item taken this frame, or -1.
 	Chosen int
 }
@@ -70,7 +70,7 @@ func ContextMenu(c *ui.Context, text string, items []MenuItem, o ContextMenuOpti
 	if clicked >= 0 {
 		res.Chosen = clicked
 	}
-	if panel != nil {
+	if panel.Valid() {
 		b := area.Bounds()
 		panel.Left(b.X + s.x).Top(b.Y + s.y)
 	}

navigation/documenttabs.go

@@ -22,7 +22,7 @@ type DocumentTabsOptions struct {
 }
 
 type DocumentTabsResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 	// Closed is the tab × or Delete closed, or -1.
 	Closed int
@@ -46,8 +46,8 @@ func DocumentTabs(c *ui.Context, text string, titles []string, selected *int, o
 		for i, t := range titles {
 			// Keyed by title, so focus follows its tab.
 			ui.Box(c).Key(t).Children(func() {
-				var x *ui.Element
-				shell, base, st := pixel.Shell(c, func() *ui.Element {
+				var x ui.Element
+				shell, base, st := pixel.Shell(c, func() ui.Element {
 					tab := p.Tab(i).Label(t).Disabled(o.Disabled)
 					// The × is no Tab stop; Delete closes by keyboard.
 					tab.Children(func() {

navigation/dropdown.go

@@ -14,7 +14,7 @@ type DropdownMenuOptions struct {
 }
 
 type DropdownMenuResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Chosen is the item taken this frame, or -1.
 	Chosen int
 }

navigation/levelselect.go

@@ -34,7 +34,7 @@ type LevelSelectOptions struct {
 }
 
 type LevelSelectResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Chosen is Enter or a click on an open stage.
 	Changed, Chosen bool
 }

navigation/menubar.go

@@ -19,7 +19,7 @@ type MenuBarOptions struct {
 }
 
 type MenuBarResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Menu and Item are this frame's choice, else -1.
 	Menu, Item int
 }
@@ -66,7 +66,7 @@ func MenuBar(c *ui.Context, text string, menus []Menu, o MenuBarOptions) MenuBar
 	px, py, over := row.PointerPosition()
 	moved := over && [2]float32{px, py} != b.ptr
 	b.ptr = [2]float32{px, py}
-	var anchor *ui.Element
+	var anchor ui.Element
 	row.Draw(func(p *ui.Painter, r ui.Rect) {
 		g := k.Canvas(p, r)
 		g.Rect(0, 0, g.W, g.H, pixel.Face)
@@ -92,7 +92,7 @@ func MenuBar(c *ui.Context, text string, menus []Menu, o MenuBarOptions) MenuBar
 			}
 		}
 	})
-	if b.open >= 0 && anchor != nil {
+	if b.open >= 0 && anchor.Valid() {
 		items := menus[b.open].Items
 		res.Item = b.m.keys(row.Shortcut, items)
 		if _, clicked := b.m.list(c, anchor, items); clicked >= 0 {

navigation/menus.go

@@ -62,10 +62,10 @@ func (m *menu) keys(short func(ui.Modifiers, ui.Key) bool, items []MenuItem) int
 }
 
 // list shows the menu under anchor and returns clicks.
-func (m *menu) list(c *ui.Context, anchor *ui.Element, items []MenuItem) (panel *ui.Element, clicked int) {
+func (m *menu) list(c *ui.Context, anchor ui.Element, items []MenuItem) (panel ui.Element, clicked int) {
 	k := pixel.K(c)
 	clicked = -1
-	panel = ui.PopoverBase(c, anchor, &m.open, func(panel *ui.Element) {
+	panel = ui.PopoverBase(c, anchor, &m.open, func(panel ui.Element) {
 		// Only a pointer that moves lights the item under it.
 		px, py, over := panel.PointerPosition()
 		moved := over && [2]float32{px, py} != m.ptr
@@ -104,7 +104,7 @@ func (m *menu) list(c *ui.Context, anchor *ui.Element, items []MenuItem) (panel
 		})
 	})
 	// Clicks on a rule or the edge close it too.
-	if panel != nil && panel.Clicked() {
+	if panel.Valid() && panel.Clicked() {
 		m.open = false
 	}
 	return panel, clicked

navigation/pagedots.go

@@ -14,7 +14,7 @@ type PageDotsOptions struct {
 }
 
 type PageDotsResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -22,7 +22,7 @@ type PageDotsResult struct {
 func PageDots(c *ui.Context, text string, page *int, total int, o PageDotsOptions) PageDotsResult {
 	k := pixel.K(c)
 	check(*page, total)
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleSlider).Label(text).Description(fmt.Sprintf("%d/%d", *page, total)).Disabled(o.Disabled)
 	})
 	old := *page

navigation/pagination.go

@@ -17,7 +17,7 @@ type PaginationOptions struct {
 }
 
 type PaginationResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 

navigation/rail.go

@@ -18,7 +18,7 @@ type NavRailOptions struct {
 }
 
 type NavRailResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -30,7 +30,7 @@ func NavRail(c *ui.Context, text string, items []NavItem, selected *int, o NavRa
 	v := *selected
 	res.Element = ui.RadioGroup(c, func() {
 		for i, it := range items {
-			shell, _, st := pixel.Shell(c, func() *ui.Element {
+			shell, _, st := pixel.Shell(c, func() ui.Element {
 				return ui.RadioBase(c, &v, i).Label(it.Label).Disabled(o.Disabled)
 			})
 			shell.Size(k.D(22), k.D(22)).Draw(func(p *ui.Painter, r ui.Rect) {

navigation/sidebar.go

@@ -27,7 +27,7 @@ type SidebarOptions struct {
 }
 
 type SidebarResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -46,7 +46,7 @@ func Sidebar(c *ui.Context, text string, sections []SidebarSection, selected *in
 			for _, it := range sec.Items {
 				i := n
 				n++
-				shell, _, st := pixel.Shell(c, func() *ui.Element {
+				shell, _, st := pixel.Shell(c, func() ui.Element {
 					return ui.RadioBase(c, &v, i).Label(it.Label).Disabled(o.Disabled)
 				})
 				shell.Size(k.D(w), k.D(pixel.LineHeight+2)).Draw(func(p *ui.Painter, r ui.Rect) {

navigation/steps.go

@@ -38,7 +38,7 @@ var waving = pixel.MustSprite(`
 type StepsOptions struct{}
 
 // Steps are flags on a path: done, waving, then locked.
-func Steps(c *ui.Context, labels []string, current int, o StepsOptions) *ui.Element {
+func Steps(c *ui.Context, labels []string, current int, o StepsOptions) ui.Element {
 	k := pixel.K(c)
 	if current < 0 || current >= len(labels) {
 		panic(fmt.Sprintf("navigation: step %d of %d", current, len(labels)))

navigation/tabs.go

@@ -14,7 +14,7 @@ type TabsOptions struct {
 }
 
 type TabsResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -52,7 +52,7 @@ func tabs(c *ui.Context, text string, labels []string, selected *int, side bool,
 		}
 		p.List.Label(text).Children(func() {
 			for i, l := range labels {
-				shell, _, st := pixel.Shell(c, func() *ui.Element { return p.Tab(i).Label(l).Disabled(o.Disabled) })
+				shell, _, st := pixel.Shell(c, func() ui.Element { return p.Tab(i).Label(l).Disabled(o.Disabled) })
 				w, h := size(i), th
 				if side {
 					w = tw

navigation/toc.go

@@ -29,7 +29,7 @@ type TableOfContentsOptions struct {
 }
 
 type TableOfContentsResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -42,7 +42,7 @@ func TableOfContents(c *ui.Context, text string, items []TocItem, current *int,
 	v := *current
 	res.Element = ui.RadioGroup(c, func() {
 		for i, it := range items {
-			shell, _, st := pixel.Shell(c, func() *ui.Element {
+			shell, _, st := pixel.Shell(c, func() ui.Element {
 				return ui.RadioBase(c, &v, i).Label(it.Title).Disabled(o.Disabled)
 			})
 			shell.Size(k.D(w), k.D(pixel.LineHeight)).Draw(func(p *ui.Painter, r ui.Rect) {

navigation/toolbar.go

@@ -9,7 +9,7 @@ import (
 type ToolbarOptions struct{}
 
 // Toolbar holds tool buttons as one Tab stop; arrows move.
-func Toolbar(c *ui.Context, text string, o ToolbarOptions, content func()) *ui.Element {
+func Toolbar(c *ui.Context, text string, o ToolbarOptions, content func()) ui.Element {
 	k := pixel.K(c)
 	return ui.Row(c).AlignSelf(ui.Start).Gap(k.D(2)).Padding(k.D(3)).AlignItems(ui.Center).Role(ui.RoleToolbar).Label(text).FocusGroup(ui.Horizontal).Draw(func(p *ui.Painter, r ui.Rect) {
 		g := k.Canvas(p, r)

navigation/verticaltabs.go

@@ -9,7 +9,7 @@ type VerticalTabsOptions struct {
 }
 
 type VerticalTabsResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 

navigation/worldmap.go

@@ -46,7 +46,7 @@ type WorldMapOptions struct {
 }
 
 type WorldMapResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Entered reports Enter, or a click, at the hero's node.
 	Changed, Entered bool
 }
@@ -66,7 +66,7 @@ func WorldMap(c *ui.Context, text string, nodes []MapNode, paths [][2]int, at *i
 		panic(fmt.Sprintf("navigation: node %d of %d", *at, len(nodes)))
 	}
 	w, h := pixel.Or("WorldMap Width", o.Width, 240), pixel.Or("WorldMap Height", o.Height, 140)
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleGroup).Label(text).Description(nodes[*at].Name).Disabled(o.Disabled)
 	})
 	wk := ui.Local(base, walkKey{}, func() walk { return walk{from: *at} })