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>
45 lines
1.3 KiB
Markdown
45 lines
1.3 KiB
Markdown
# 429 CurrentTimeIndicator · 当前时间线
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## 用途
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填满父元素，按当前时间在当天中的比例画一条横线，用于时间网格。
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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.Box(c).Size(200, 240).Children(func() {
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datetime.CurrentTimeIndicator(c, datetime.CurrentTimeIndicatorOptions{Location: time.Local})
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})
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}
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ui.Render(view, 400, 300, 1)
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```
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## 参数
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`func CurrentTimeIndicator(c *ui.Context, opts CurrentTimeIndicatorOptions) ui.Element`
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Location` | `*time.Location` | 必填 | 切分日期与显示时间所用的时区；为 nil 时 panic，不做隐式 UTC 转换。 |
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| `Day` | `Date` | 零值（今天） | 父元素自上而下代表的日期；不是今天时不显示。 |
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| `Now` | `time.Time` | 零值（系统时钟） | 当前时间；固定后不再定时刷新，便于测试。 |
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| `Hour12` | `bool` | false | 12 小时制显示时间。 |
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## 状态
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显示（Danger 色线与菱形）、不在当天时隐藏。
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## 事件
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无事件；读屏通过标签读出当前时间。
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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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- 仅在被构建（可见）时用 `c.After` 预约下一分钟的重绘；隐藏后不再预约，自动停止。
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