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>
52 lines
1.3 KiB
Markdown
52 lines
1.3 KiB
Markdown
# 348 AudioPlayer 音频播放器
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## 用途
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音频播放外壳：播放、暂停、进度与时长，播放本身由调用方驱动。
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## 最小示例
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```go
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st := media.AudioState{Title: "Overture", Duration: 3 * time.Minute}
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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media.AudioPlayer(c, st, media.AudioPlayerOptions{
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OnPlay: func() { st.Playing = true },
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OnPause: func() { st.Playing = false },
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OnSeek: func(d time.Duration) { st.Position = d },
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})
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}
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ui.Render(view, 400, 300, 1)
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```
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## 参数
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`func AudioPlayer(c *ui.Context, st AudioState, opts AudioPlayerOptions) ui.Element`
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`AudioState`：`Title`、`Position`、`Duration`、`Playing`。
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `OnPlay / OnPause / OnSeek` | `func` | 必填 | 缺少任一回调时 panic。 |
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| `Disabled` | `bool` | false | 禁用。 |
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## 状态
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播放中显示暂停按钮，暂停时显示播放按钮；`Duration` 为 0 时不显示进度条。
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## 事件
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通过回调报告，组件不改动 `st`。
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## 键盘操作
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| 按键 | 作用 |
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| --- | --- |
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| Tab | 播放按钮、进度条 |
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| Space | 组件内任意位置播放或暂停（按钮聚焦时由按钮处理） |
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| ← / → | 进度条聚焦时跳转 5 秒 |
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## 限制
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- 组件不播放声音。
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