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
# 015 Avatar 头像
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## 用途
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圆形人物头像。依次回退：图片 → 姓名首字母 → 默认人物图标。
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## 最小示例
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```go
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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ui.Row(c).Gap(8).Children(func() {
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display.Avatar(c, "Sakiko Togawa", display.AvatarOptions{Size: 40})
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display.Avatar(c, "", display.AvatarOptions{})
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})
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}
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```
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## 参数
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`func Avatar(c *ui.Context, name string, opts AvatarOptions) ui.Element`
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Image` | `*ui.Bitmap` | `nil` | 头像图片，按圆形裁切填充。 |
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| `Size` | `float32` | `0`（即 32） | 直径（DIP）。负数 panic。 |
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`name` 用作无障碍名称和首字母来源；为空时无障碍名称是“未命名”。
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## 状态
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- 图片：圆形裁切。
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- 首字母：取第一个和最后一个词的首字母（大写），衬线字体，`AccentText` 文字配 `Selection` 底色。
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- 无可用首字母：`SurfaceHover` 底色加人物图标。
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## 事件
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无。
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## 键盘操作
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不获取焦点。辅助技术把头像读作以 `name` 命名的图片。
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## 限制
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- 首字母字号随头像直径而定，不随系统文本缩放放大，以免溢出圆形。
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- 中文姓名没有空格时按一个词处理，只取第一个字，例如“张伟”显示为“张”。
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- 头像不使用 MyGo `ui.Avatar`，因为它的尺寸固定为字号的 2.25 倍，无法配置（`ui/indicators.go:383`）。
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