ZacharyZhang-NYandClaude Opus 5.5
bcce34cda1
MyGo v0.5.5 returns ui.Element as a checked value handle instead of a
pointer. Migrated with `mygo migrate-ui`, then fixed what the codemod
leaves to review:
- Element nil checks become .Valid(); absent elements are ui.Element{}.
- Input handlers and paint callbacks run outside the build pass, where
elements expire and Context methods are inert: read IsDisabled into a
local during the build, keep a ui.Handle for Focus, use c.Services()
for clipboard access, create ui.Local state during the build.
- Add core.AutoFocus: v0.5.5 records an overlay's opener after its
content builds, so same-frame autofocus lost focus restore on close.
It focuses one frame later; cascader rows defer their focus likewise.
- core.OverlayLayer identifies build passes by the root element, not
c.Now(), which repeats across passes and under the Tester clock.
- Context menus survive the opening press counted as PressedOutside;
split button tooltip no longer reorders its open menu; disabled
menubar rows pass presses to the panel; Form defers blur-started
async checks so the growing message no longer moves Submit away
from the release; Combobox drops its disabled copy now that MyGo
blocks typing under a disabled wrapper (canary flipped to a guard).
- The Tester clock is virtual: tests use Advance/Now instead of
time.Sleep/time.Now and read element state inside the view. The web
mirror advances the clock to wall time before each frame and input.
- AGENTS.md and docs describe the value Element API and the new pin.
Snapshot goldens are darwin-only and were not re-verified here.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
3.1 KiB
3.1 KiB
065 NavigationMenu 导航菜单
用途
站点式的顶层导航：直接链接与下拉分组（分组内可再分小节），用应用已有的 *ui.Router 标记当前路径并跳转；可选显示 MyGo 的后退、前进按钮。
最小示例
navigation.NavigationMenu(c, router, []navigation.NavigationLink{
{Label: "Home", Path: "/"},
{Label: "Library", Items: []navigation.NavigationLink{
{Label: "Poems", Path: "/library/poems", Description: "Verse of the court"},
}},
}, navigation.NavigationMenuOptions{History: true})
router.View(c, func(r *ui.Route) { ui.Text(c, r.Path()) })
签名：func NavigationMenu(c *ui.Context, router *ui.Router, links []NavigationLink, opts NavigationMenuOptions) ui.Element
参数
router 为 nil 或 links 为空时 panic。路由状态由应用持有，组件只读 Path() 并调用 Push。
NavigationLink
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
Label |
string |
必填 | 名称；为空时 panic。 |
Path |
string |
叶子必填 | 点击后 router.Push(Path)；既无 Path 也无 Items 时 panic。 |
Icon |
*ui.SVG |
nil | 名称前图标。 |
Description |
string |
"" | 下拉面板中名称下方的说明。 |
Items |
[]NavigationLink |
nil | 非 nil 时为分组：顶层显示为下拉按钮，面板内显示为小节标题。 |
NavigationMenuOptions
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
History |
bool |
false | 在前面显示后退、前进按钮（MyGo BackButton / ForwardButton）。 |
Label |
string |
内置“导航菜单” | 链接组的无障碍名称。 |
状态
- 当前路径：路径等于链接，或位于其下（
/library覆盖/library/poems；/只匹配自身）。顶层项以 600 字重与底部 AccentText 线标记；面板中的当前项为 Selection 背景、左侧边线与 600 字重。 - 悬停或展开：SurfaceHover 背景。焦点环 2 DIP。
- 历史按钮在历史两端禁用；右键列出可前往的页面（MyGo 行为）。
事件
- 无返回事件：跳转直接作用于
router，调用方读取router.Path()。
键盘操作
- Tab：进入顶层链接组；←/→ 在顶层项之间移动。
- 在分组上按 ↓、Enter 或 Space 打开面板，焦点在第一个链接；↑/↓ 在面板内移动，Enter 跳转并关闭，Escape 关闭并把焦点还给分组按钮。
- 历史：Cmd+[ / Cmd+]（macOS），Alt+←/→（其他平台），以及鼠标侧键，由 MyGo 路由处理。
限制
- MyGo 历史按钮的提示文字固定为英文 “Back” / “Forward”（
ui/router.go:713）；本组件覆盖了无障碍名称，但提示仍为英文。 - 历史按钮的外观来自 MyGo 主题按钮样式（经
core.Use映射为 MujicaUI 颜色）。 - 弹层打开时在 160 ms 内淡入，减少动画时直接显示。关闭时立即消失：弹层关闭后 MyGo 不再构建其元素，公开接口无法为已移除的浮层做淡出。
- 下拉面板最高为锚点上方或下方可用空间，超出时在面板内滚动；方向键移动焦点时自动滚入视野。