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>
1.2 KiB
1.2 KiB
298 LayoutTransition 布局过渡
用途
内容的尺寸与位置变化时从旧布局过渡到新布局（FLIP）。
最小示例
open := false
view := func(c *ui.Context) {
core.Use(c, core.Settings{})
feedback.LayoutTransition(c, feedback.LayoutTransitionOptions{Clip: true}, func() {
ui.Text(c, "Program")
if open {
ui.Text(c, "Overture · Masquerade · Finale")
}
})
}
ui.Render(view, 400, 300, 1)
签名：func LayoutTransition(c *ui.Context, opts LayoutTransitionOptions, content func()) ui.Element
参数
LayoutTransitionOptions
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
| Duration | time.Duration | 0（即 120 ms） | 时长；为负 panic。 |
| Row | bool | false | 横向排列内容。 |
| Clip | bool | false | 尺寸变化时裁剪溢出内容。 |
基于 MyGo Transition 的 Position 与 Size。
状态
- 尺寸过渡中内容按每一帧的尺寸重新布局。
- 窗口缩放引起的变化不动画；减少动画时直接到位。
事件
- 无。
键盘操作
- 无。
限制
- 被同一变化推动的兄弟元素需要各自的 LayoutTransition 才会同步移动。