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>
36 lines
908 B
Markdown
36 lines
908 B
Markdown
# 133 TrendIndicator 趋势指示
|
||
|
||
## 用途
|
||
|
||
以方向箭头、带符号数值和无障碍方向文字展示指标变化。
|
||
|
||
## 最小示例
|
||
|
||
```go
|
||
view := func(c *ui.Context) {
|
||
core.Use(c, core.Settings{})
|
||
chart.TrendIndicator(c, 12.5, chart.TrendIndicatorOptions{Precision: 1, Unit: "%", Note: "vs Lent"})
|
||
}
|
||
ui.Render(view, 400, 100, 1)
|
||
```
|
||
|
||
## 参数
|
||
|
||
`change float64` 必须有限；`Precision` 默认 0，负值 panic；`Unit` 和 `Note` 默认空；`Invert` 默认 false，开启后下降采用成功语义；`Format` 替换数值格式。
|
||
|
||
## 状态
|
||
|
||
上升、下降、持平；正负号与箭头提供颜色之外的区分；方向词支持中英文和消息覆盖。
|
||
|
||
## 事件
|
||
|
||
返回 `ui.Element`，展示调用方提供的变化值。
|
||
|
||
## 键盘操作
|
||
|
||
展示部件；辅助技术读取方向和完整变化值。
|
||
|
||
## 限制
|
||
|
||
变化值由调用方计算；组件提供显示和语义颜色。
|