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>
56 lines
1.6 KiB
Markdown
56 lines
1.6 KiB
Markdown
# 020 Kbd 快捷键
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## 用途
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把单键或组合键显示为键帽。按平台显示：macOS 用 ⌘ ⇧ ⌥ ⌃ 等符号且不加连接符；其他平台显示 Ctrl、Shift、Alt，键之间用“+”连接。只做展示，不注册快捷键。
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## 最小示例
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```go
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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ui.Row(c).Gap(6).Children(func() {
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display.Text(c, "Command palette", display.TextOptions{})
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display.Kbd(c, "Mod", "Shift", "P")
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})
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}
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```
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## 参数
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`func Kbd(c *ui.Context, keys ...string) ui.Element`
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至少要传一个键，键名不能为空，否则 panic。键名不区分大小写：
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| 键名 | macOS | 其他平台 |
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| --- | --- | --- |
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| `Mod` | ⌘（Command） | Ctrl |
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| `Ctrl` | ⌃ | Ctrl |
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| `Alt` | ⌥（Option） | Alt |
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| `Shift` | ⇧ | Shift |
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| `Enter` | ↩ | Enter |
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| `Esc` | esc | Esc |
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| `Tab` | ⇥ | Tab |
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| `Backspace` | ⌫ | Backspace |
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| `Delete` | ⌦ | Delete |
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| `Up` `Down` `Left` `Right` | ↑ ↓ ← → | ↑ ↓ ← → |
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其他键名按原样显示；单个字符转为大写。
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## 状态
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纯展示。键帽随系统文本缩放放大，使用等宽字体、`Surface` 底色、`ControlBorder` 边框，底边 2 DIP。
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## 事件
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无。
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## 键盘操作
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不获取焦点，也不注册任何快捷键。辅助技术读出完整的组合键文字，例如“Command+Shift+P”或“Ctrl+Shift+P”。
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## 限制
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- 平台在编译时由 `runtime.GOOS` 决定。Gallery 的网页镜像显示的是运行 Go 进程那台机器的平台。
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- `Mod` 与 MyGo 的 `ui.Cmd` 一致：macOS 上是 Command，其他平台是 Control。
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