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>
1.6 KiB
1.6 KiB
002 TitleBar 标题栏
用途
窗口顶部的标题行：衬线体应用标题、前后工具插槽。空白处可拖动窗口，并为系统窗口按钮留出空间。配合 mygo.TitleBarHidden 使用。
最小示例
layout.TitleBar(c, "Court Records", layout.TitleBarOptions{
Trailing: func() { input.Button(c, "Share", input.ButtonOptions{Variant: input.Ghost}) },
})
签名：func TitleBar(c *ui.Context, title string, opts TitleBarOptions) ui.Element
参数
| 字段 | 类型 | 默认值 | 含义 |
|---|---|---|---|
title |
string |
必填 | 标题文字，过长时单行省略。 |
Leading |
func() |
nil | 标题前的工具，如侧栏开关。 |
Trailing |
func() |
nil | 标题后的工具。 |
状态
- 最小高度取
c.TitleBar().Height与控件高度 + 2 单位中较大者（默认密度 44 DIP）；标题字号随系统文本缩放，放大后标题栏随之增高。 - 左右内边距在
c.TitleBar().Left/Right之外再加 3 单位，不覆盖系统按钮；全屏时预留为 0。 - Surface 底色，底部 1 DIP Border 分隔线。
事件
TitleBar 本身无事件；插槽中控件照常报告 Clicked 等事件。
键盘操作
插槽控件照常接受 Tab、Enter、Space。标题栏本身不获取焦点。
限制
- 拖动、双击缩放由 MyGo
DragWindow实现，只作用于非交互区域；需真机验证，无窗口测试无法覆盖。 - 系统窗口按钮外观由系统决定，不换肤。
- 普通有标题栏的窗口中
c.TitleBar()为零，组件只是一行普通标题。