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>
51 lines
1.6 KiB
Markdown
51 lines
1.6 KiB
Markdown
# 078 Statistic · 统计数值
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## 用途
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突出显示一个数值，附带标题、单位、前后缀、精度与变化值说明。组件只格式化调用方给出的数值，不计算业务指标。
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## 最小示例
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```go
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change := 12.5
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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data.Statistic(c, 12840, data.StatisticOptions{
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Title: "Pilgrims", Unit: "souls", Precision: 0,
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Change: &change, ChangeUnit: "%", ChangeNote: "vs last feast",
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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 Statistic(c *ui.Context, value float64, opts StatisticOptions) ui.Element`。
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Title` | `string` | 空 | 数值上方的标题。 |
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| `Precision` | `int` | 0 | 小数位数；负数 panic。 |
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| `Prefix`, `Suffix` | `string` | 空 | 紧贴数字的前后缀，如 `£`、`k`。 |
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| `Unit` | `string` | 空 | 数字后的较小单位文字。 |
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| `Format` | `func(float64) string` | 千分位分组 | 自定义数字格式。 |
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| `Change` | `*float64` | nil | 变化值：正数显示上箭头与 Success 色，负数下箭头与 Danger 色，零为持平；同时带正负号。 |
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| `ChangeUnit` | `string` | 空 | 变化值单位，如 `%`。 |
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| `ChangeNote` | `string` | 空 | 变化值说明，如“较上次”。 |
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## 状态
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仅展示：上升、下降、持平（图标、符号与颜色共同表示）。
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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；分组名称把标题、数值、单位与变化一起读出。
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## 限制
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- 默认格式使用逗号分组与点号小数；其他地区格式通过 `Format` 提供。
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