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>
65 lines
2.9 KiB
Markdown
65 lines
2.9 KiB
Markdown
# 093 Progress 进度
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## 用途
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显示任务进度（确定或不确定，线形或环形），以及计量值（如磁盘占用）及其阈值。归并 MyGo 的 Progress bar 与 Meter：`Progress` 为进度模式，`Meter` 为计量模式。两者分别基于 `ui.Progress` 与 `ui.Meter` 元素重绘，保留其无障碍角色与数值。
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## 最小示例
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```go
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feedback.Progress(c, 0.62, feedback.ProgressOptions{Label: "Uploading", ShowValue: true})
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feedback.Progress(c, 0, feedback.ProgressOptions{Shape: feedback.ProgressRing, Indeterminate: true, Label: "Connecting"})
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feedback.Meter(c, 93, feedback.MeterOptions{
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Max: 100, Label: "Disk", ShowValue: true,
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Levels: &ui.MeterLevels{Warning: 70, Critical: 90},
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})
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```
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签名：
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- `func Progress(c *ui.Context, value float64, opts ProgressOptions) ui.Element`
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- `func Meter(c *ui.Context, value float64, opts MeterOptions) ui.Element`
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## 参数
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`ProgressOptions`：
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `value` | `float64` | 必填 | 0 到 1；超出或 NaN 时 panic（不确定模式忽略）。 |
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| `Shape` | `ProgressShape` | `ProgressLinear` | `ProgressLinear` 或 `ProgressRing`；其他值 panic。 |
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| `Indeterminate` | `bool` | `false` | 未知长度的进度。 |
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| `Label` | `string` | `""` | 显示在旁边并作为无障碍名称；为空时名称为“Loading”。 |
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| `ShowValue` | `bool` | `false` | 显示百分比。 |
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| `Size` | `float32` | 环形 48、线形填满 | 环形直径或线形宽度；负数、NaN 或无穷 panic。 |
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`MeterOptions`：
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `value` | `float64` | 必填 | 须在范围内，否则 panic。 |
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| `Min`, `Max` | `float64` | 0, 1（两者都为 0 时） | 范围；非有限值或 `Max <= Min` panic。 |
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| `Levels` | `*ui.MeterLevels` | `nil` | 阈值：达到 `Warning` 为偏高、达到 `Critical` 为严重；`Critical < Warning` 时低值为坏（如电量）。须在范围内。 |
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| `Label` | `string` | `""` | 名称。 |
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| `ShowValue` | `bool` | `false` | 显示“值 / 最大值”。 |
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| `Width` | `float32` | 填满 | 宽度；负数、NaN 或无穷 panic。 |
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## 状态
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- 确定进度变化时以 120 ms 过渡，减少动画时直接跳到新值。
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- 不确定进度只在绘制时移动（只重绘、不重建视图）；减少动画时显示满格静态填充（对比度不低于 3:1）和“In progress”文字；切换到减少动画时进行中的过渡直接跳到目标值。
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- 计量条按级别使用 Success / Warning / Danger 颜色，同时显示“Normal / High / Critical / Low”文字与阈值刻度，并把级别写入无障碍名称。
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## 事件
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无。
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## 键盘操作
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不可聚焦；读屏读取名称与数值。
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## 限制
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- 百分比按缩放后的文字尺寸测量，放不进环内时显示在环旁边。
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- MyGo 不提供自定义无障碍数值的公开接口，因此必须基于 `ui.Progress` / `ui.Meter` 元素绘制。
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