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>
46 lines
1.0 KiB
Markdown
46 lines
1.0 KiB
Markdown
# 358 MicLevelMeter 麦克风电平
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## 用途
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分段电平条，带峰值保持与 dB 读数。
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## 最小示例
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```go
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level := float32(0.4) // the input's peak, 0 to 1 of full scale
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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media.MicLevelMeter(c, level, media.MicLevelMeterOptions{})
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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 MicLevelMeter(c *ui.Context, level float32, opts MicLevelMeterOptions) ui.Element`
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`level` 为满刻度的 0 到 1，超出 panic。
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Hold` | `time.Duration` | 1.5 秒 | 峰值保持时长。 |
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| `Label` | `string` | "Microphone level" | 无障碍名称；描述中读出当前与峰值 dB。 |
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## 状态
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24 段：前 70% 为成功色，接着警告色，最后 10% 为危险色；峰值段为空心标记；右侧显示 dB 数值，不只靠颜色。
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## 事件
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无。
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## 键盘操作
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| 按键 | 作用 |
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| --- | --- |
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| — | 不获取焦点 |
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## 限制
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- 保持结束时只请求一次重绘，空闲时不持续重绘。
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