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>
40 lines
1.2 KiB
Markdown
40 lines
1.2 KiB
Markdown
# 094 Spinner 加载标记
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## 用途
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表示未知长度的加载：四个菱形绕中心旋转。可调尺寸，可显示说明文字。Button 的加载状态也使用它。标记基于 MyGo `ui.Spinner` 元素重绘，读屏视为不确定进度。
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## 最小示例
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```go
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core.Spinner(c, core.SpinnerOptions{Size: 20, Label: "Syncing", ShowLabel: true})
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```
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签名：`func Spinner(c *ui.Context, opts SpinnerOptions) ui.Element`
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## 参数
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Size` | `float32` | 16 | 标记边长（DIP）；负数、NaN 或无穷 panic。 |
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| `Label` | `string` | 内置“Loading / 加载中” | 无障碍名称；`ShowLabel` 时也显示在旁边。 |
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| `ShowLabel` | `bool` | `false` | 在标记旁显示说明。 |
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| `Color` | `ui.Color` | `AccentText` | 标记颜色。 |
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## 状态
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- 只在被绘制时请求重绘：不再构建（隐藏或停止加载）或滚出视口后动画立即停止，不留定时器。
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- 减少动画模式下静止显示，保留名称与说明。
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## 事件
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无。
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## 键盘操作
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不可聚焦。
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## 限制
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- 每帧重绘，而非 MyGo 自带 spinner 的分步重绘；只在显示时产生开销。
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