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>
1.7 KiB
1.7 KiB
006 Grid 网格
用途
按行列排布子元素：列宽可为固定尺寸、按内容或按比例分配剩余空间；子项可指定位置与跨行跨列。基于 MyGo 网格布局。
最小示例
layout.Grid(c, layout.GridOptions{Columns: []ui.Track{ui.Fixed(96), ui.Fr(1)}}, func() {
layout.GridCell(c, layout.GridCellOptions{ColumnSpan: -1}, func() { ui.Text(c, "Header") })
ui.Text(c, "Name")
ui.Text(c, "Ada")
})
签名：
func Grid(c *ui.Context, opts GridOptions, children func()) ui.Elementfunc GridCell(c *ui.Context, opts GridCellOptions, build func()) ui.Element
参数
GridOptions
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
Columns |
[]ui.Track |
一列 Fr(1) |
各列尺寸：ui.Fixed(dip)、ui.Fr(n)（分配剩余空间）、ui.FitContent()。 |
Rows |
[]ui.Track |
nil | 前几行尺寸；之后自动添加的行按内容高度。 |
Gap |
Space |
SpaceM（3 单位） |
列间距，也是默认行间距。 |
RowGap |
Space |
同 Gap |
行间距。 |
GridCellOptions
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
Column, Row |
int |
0（自动放置） | 起始列、行，从 1 计；负数 panic。 |
ColumnSpan, RowSpan |
int |
1 | 跨越轨道数；-1 跨到最后一条；小于 -1 panic。 |
GridCell 内的单个子元素会拉伸铺满整个单元格，与网格直接子项一致。
状态
布局组件，无交互状态。
事件
无。
键盘操作
不获取焦点；Tab 顺序为构建顺序。
限制
- 网格会构建全部子项；大量条目请使用虚拟化列表。
- 不校验跨度是否超出列数，超出时由 MyGo 按其规则扩展。