Files
8bitMyGoUI/navigation/dropdown.go
T
ZacharyZhang-NYandClaude Opus 5.5 03e1f91706 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>
2026-10-17 01:31:08 -04:00

47 lines
1.2 KiB
Go

package navigation
import (
"log/slog"
"github.com/egoist/mygo/ui"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/input"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
)
type DropdownMenuOptions struct {
Disabled bool
}
type DropdownMenuResult struct {
Element ui.Element
// Chosen is the item taken this frame, or -1.
Chosen int
}
// DropdownMenu is a button opening a menu of items.
func DropdownMenu(c *ui.Context, text string, items []MenuItem, o DropdownMenuOptions) DropdownMenuResult {
off := o.Disabled || pixel.Current(c).Inert
b := input.Button(c, text+" ▼", input.ButtonOptions{Label: text, Disabled: o.Disabled})
m := ui.Local(b.Element, menuKey{}, func() menu { return menu{lit: -1} })
// The button keeps the focus and parks it while off.
if off {
m.open = false
}
res := DropdownMenuResult{Element: b.Element, Chosen: -1}
switch {
case b.Clicked && m.open:
m.open = false
case b.Clicked, !m.open && !off && pixel.Shortcut(b.Element, 0, ui.KeyDown):
m.show(items)
}
res.Chosen = m.keys(b.Element.Shortcut, items)
if _, clicked := m.list(c, b.Element, items); clicked >= 0 {
res.Chosen = clicked
}
if res.Chosen >= 0 {
slog.Debug("8bit: dropdown", "label", text, "item", items[res.Chosen].Label)
}
return res
}