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>
1.5 KiB
1.5 KiB
353 MediaControls 媒体控制
用途
上一首、播放/暂停、下一首、循环、随机，一组可用方向键切换焦点的按钮。
最小示例
st := media.MediaControlsState{}
view := func(c *ui.Context) {
core.Use(c, core.Settings{})
media.MediaControls(c, st, media.MediaControlsOptions{
OnPrevious: func() {}, OnNext: func() {},
OnPlay: func() { st.Playing = true }, OnPause: func() { st.Playing = false },
OnLoop: func(m media.LoopMode) { st.Loop = m }, OnShuffle: func(on bool) { st.Shuffle = on },
})
}
ui.Render(view, 400, 300, 1)
参数
func MediaControls(c *ui.Context, st MediaControlsState, opts MediaControlsOptions) ui.Element
MediaControlsState：Playing、Loop（LoopOff、LoopAll、LoopOne）、Shuffle、NoPrevious、NoNext。
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
OnPrevious / OnPlay / OnPause / OnNext |
func() |
必填 | 按钮回调。 |
OnLoop |
func(LoopMode) |
必填 | 收到下一个循环模式：不循环 → 列表 → 单曲。 |
OnShuffle |
func(bool) |
必填 | 随机开关。 |
Disabled |
bool |
false | 禁用。 |
状态
循环与随机开启时有选中底色和下划线，单曲循环换用带“1”的图标；循环按钮的名称说明当前模式。
事件
全部通过回调报告。
键盘操作
| 按键 | 作用 |
|---|---|
| Tab | 进入按钮组 |
| ← / → | 在按钮间移动焦点 |
| Enter / Space | 按下 |
限制
- 无。