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>
44 lines
1.4 KiB
Markdown
44 lines
1.4 KiB
Markdown
# 012 Heading 标题
|
|
|
|
## 用途
|
|
|
|
页面与区块的三级衬线标题，可带副标题与旧金色装饰分隔线（对称细线加中央菱形）。
|
|
|
|
## 最小示例
|
|
|
|
```go
|
|
view := func(c *ui.Context) {
|
|
core.Use(c, core.Settings{})
|
|
display.Heading(c, "The Grand Hall", display.HeadingOptions{Subtitle: "Winter ceremonies", Divider: true})
|
|
display.Heading(c, "Guest Ledger", display.HeadingOptions{Level: 2})
|
|
}
|
|
```
|
|
|
|
## 参数
|
|
|
|
`func Heading(c *ui.Context, title string, opts HeadingOptions) ui.Element`
|
|
|
|
| 字段 | 类型 | 默认值 | 含义 |
|
|
| --- | --- | --- | --- |
|
|
| `Level` | `int` | `0`（即 1） | 1、2、3 级，对应 28、22、18 DIP。其他值 panic。 |
|
|
| `Subtitle` | `string` | `""` | 标题下方的说明文字，使用 `TextMuted`。 |
|
|
| `Divider` | `bool` | `false` | 在下方绘制装饰分隔线，颜色为 `Ornament`。 |
|
|
|
|
## 状态
|
|
|
|
纯展示，仅默认状态。字号按系统文本缩放（`Preferences().TextScale`）放大。
|
|
|
|
## 事件
|
|
|
|
无。
|
|
|
|
## 键盘操作
|
|
|
|
不获取焦点。装饰线不进入无障碍树。
|
|
|
|
## 限制
|
|
|
|
- 标题字体为 `theme.SerifFont`（Georgia、宋体类回退）；系统缺字时由系统回退字体显示。
|
|
- MyGo v0.2.10 没有 Heading 角色（`ui/access.go` 的 Role 列表中没有），辅助技术把标题读作普通文本，无法按标题层级导航。
|
|
- 分隔线只在 Heading 内绘制，不依赖 Divider 组件。
|