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>
2.9 KiB
2.9 KiB
093 Progress 进度
用途
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。
最小示例
feedback.Progress(c, 0.62, feedback.ProgressOptions{Label: "Uploading", ShowValue: true})
feedback.Progress(c, 0, feedback.ProgressOptions{Shape: feedback.ProgressRing, Indeterminate: true, Label: "Connecting"})
feedback.Meter(c, 93, feedback.MeterOptions{
Max: 100, Label: "Disk", ShowValue: true,
Levels: &ui.MeterLevels{Warning: 70, Critical: 90},
})
签名：
func Progress(c *ui.Context, value float64, opts ProgressOptions) ui.Elementfunc Meter(c *ui.Context, value float64, opts MeterOptions) ui.Element
参数
ProgressOptions：
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
value |
float64 |
必填 | 0 到 1；超出或 NaN 时 panic（不确定模式忽略）。 |
Shape |
ProgressShape |
ProgressLinear |
ProgressLinear 或 ProgressRing；其他值 panic。 |
Indeterminate |
bool |
false |
未知长度的进度。 |
Label |
string |
"" |
显示在旁边并作为无障碍名称；为空时名称为“Loading”。 |
ShowValue |
bool |
false |
显示百分比。 |
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。 |
MeterOptions：
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
value |
float64 |
必填 | 须在范围内，否则 panic。 |
Min, Max |
float64 |
0, 1（两者都为 0 时） | 范围；非有限值或 Max <= Min panic。 |
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。 |
Label |
string |
"" |
名称。 |
ShowValue |
bool |
false |
显示“值 / 最大值”。 |
Width |
float32 |
填满 | 宽度；负数、NaN 或无穷 panic。 |
状态
- 确定进度变化时以 120 ms 过渡，减少动画时直接跳到新值。
- 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。
- 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。
事件
无。
键盘操作
不可聚焦；读屏读取名称与数值。
限制
- 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。
- 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。