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>
50 lines
1.4 KiB
Markdown
50 lines
1.4 KiB
Markdown
# 350 AudioSpectrum 音频频谱
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## 用途
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把调用方提供的频带数值画成柱状频谱；组件自己不做动画，隐藏时不重绘。
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## 最小示例
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```go
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bands := []float32{0.2, 0.6, 0.9, 0.4, 0.1} // set by your analyser, then c.Invalidate()
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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media.AudioSpectrum(c, bands, media.AudioSpectrumOptions{})
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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 AudioSpectrum(c *ui.Context, bands []float32, opts AudioSpectrumOptions) ui.Element`
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每个频带取 0 到 1，超出范围 panic。
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Height` | `float32` | 0（即 120） | 高度。 |
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| `BandLabel` | `func(i int) string` | nil | 读数中频带的名称，如“1 kHz”；nil 时编号。 |
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| `Status / Error` | `DataStatus / string` | DataReady | 加载、失败与无数据占位，尺寸相同。 |
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| `Label` | `string` | "Spectrum" | 无障碍名称。 |
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## 状态
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聚焦后用方向键选中的频带以正文色显示，带虚线框和读数，不只靠颜色。
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## 事件
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无事件；方向键读数会通过 `Announce` 朗读。
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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 | 聚焦频谱 |
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| ← / → | 上一个 / 下一个频带 |
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| Home / End | 第一个 / 最后一个频带 |
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## 限制
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- 刷新节奏由调用方决定：更新数据后调用 `c.Invalidate()`。
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