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>
1.4 KiB
1.4 KiB
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
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。