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>
60 lines
2.1 KiB
Markdown
60 lines
2.1 KiB
Markdown
# 089 Popconfirm 气泡确认
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## 用途
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在触发控件旁做轻量确认（归档、移出列表等可撤销操作）。说明与面板关联，确认与取消都可聚焦。高风险操作请用 AlertDialog。
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## 最小示例
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```go
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open := false
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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b := input.Button(c, "Archive", input.ButtonOptions{Variant: input.Secondary})
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if b.Clicked() {
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open = true
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}
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if overlay.Popconfirm(c, b, &open, overlay.PopconfirmOptions{Title: "Archive this letter?"}).Confirmed {
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fmt.Println("archived")
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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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签名：`func Popconfirm(c *ui.Context, anchor ui.Element, open *bool, opts PopconfirmOptions) PopconfirmResult`。`anchor` 为 nil 或 `Title` 为空时 panic。
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## 参数
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Title` | `string` | 必填 | 问题，也是面板的无障碍名称。 |
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| `Description` | `string` | `""` | 补充说明，作为面板的无障碍描述。 |
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| `ConfirmLabel` | `string` | 内置“确定 / Confirm” | 确认按钮文字。 |
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| `CancelLabel` | `string` | 内置“取消 / Cancel” | 取消按钮文字。 |
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| `Danger` | `bool` | `false` | 确认按钮使用危险变体，图标改为 Danger 色，打开时焦点改在取消。 |
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`PopconfirmResult{Confirmed, Canceled bool}` 只在发生选择的那一帧为 true。
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## 状态
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与 Popover 相同的面板；下方放不下时翻到上方。
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## 事件
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- `Confirmed`：点击确认或在其上按 Enter / Space。
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- `Canceled`：点击取消、Escape、外部点击。
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## 键盘操作
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| 按键 | 行为 |
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| --- | --- |
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| 打开时 | 焦点在确认按钮；`Danger` 时在取消按钮，连按 Enter 不会执行危险操作。 |
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| Enter | 触发聚焦的按钮。 |
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| Tab | 在取消与确认间移动，焦点顺序紧跟锚点。 |
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| Escape | 取消并把焦点还给锚点。 |
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## 限制
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- 打开期间外部点击只用于关闭，不传给下方控件：`PopoverBase` 用覆盖整窗的背板接收点击（`ui/base.go:373`）。
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- 位置只有下方与上方（`ui/widgets.go:689`）；宽度不超过窗口，说明过长时滚动，按钮始终可见。
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