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>
42 lines
1.5 KiB
Markdown
42 lines
1.5 KiB
Markdown
# 203 MessageBubble 消息气泡
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## 用途
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按角色框住一条消息：用户靠右、Selection 底色；助手靠左、Surface 底与细边；系统居中、灰色小字；错误带 Danger 边框与警示图标。头像与名称为插槽，宽度可限制。
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## 最小示例
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```go
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chat.MessageBubble(c, chat.MessageAssistant, chat.MessageBubbleOptions{Name: "Herald"}, func() {
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ui.Text(c, "The ball begins at nine.")
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})
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```
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签名：`func MessageBubble(c *ui.Context, role MessageRole, opts MessageBubbleOptions, content func()) 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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| `role` | `MessageRole` | 必填 | `MessageUser`、`MessageAssistant`、`MessageSystem`、`MessageError`。 |
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| `Name` | `string` | "" | 显示在气泡上方的名称。 |
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| `Avatar` | `func()` | nil | 头像插槽，用户在右侧、其他角色在左侧；系统消息不显示。 |
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| `MaxWidth` | `float32` | 560 | 气泡最大宽度 DIP；负数 panic。 |
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| `content` | `func()` | 必填 | 气泡内容，如 MarkdownView 或 StreamingText。 |
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## 状态
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四种角色外观；错误角色同时使用图标、边框与文字，不只依赖颜色。
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## 事件
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无；交互由内容与 MessageActions 提供。
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## 键盘操作
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气泡本身不获取焦点；内容中的链接、按钮按 Tab 顺序访问。辅助技术读到“角色，名称”分组。
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## 限制
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- 气泡不自带操作栏；把 MessageActions 放在 content 中或气泡下方。
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