- name
- layout
- description
- macOS layout patterns: window sizing, toolbar, sidebar columns, resizable windows, Dynamic Type. Use when working on macOS layout, window management, or toolbar customization. Triggers: layout, window, toolbar, sidebar, defaultSize, windowResizability.
# Layout Patterns (macOS)
## Window Default Sizing
```swift
WindowGroup {
ContentView()
}
.defaultSize(width: 900, height: 600)
```
## Window Resizability
```swift
// Allow free resizing with a minimum content size
WindowGroup {
ContentView()
.frame(minWidth: 600, minHeight: 400)
}
.windowResizability(.contentMinSize)
// Fixed content size (non-resizable)
Window("Preferences", id: "prefs") {
PreferencesView()
}
.windowResizability(.contentSize)
```
## Toolbar
```swift
NavigationSplitView {
SidebarView()
} detail: {
DetailView()
.toolbar {
ToolbarItem(placement: .principal) {
Text("Document")
.font(AppTheme.Fonts.headline)
}
ToolbarItemGroup {
Button("Share", systemImage: "square.and.arrow.up") { share() }
Button("Settings", systemImage: "gear") { openSettings() }
}
}
}
```
## Customizable Toolbar
```swift
.toolbar(id: "editor") {
ToolbarItem(id: "bold", placement: .automatic) {
Button("Bold", systemImage: "bold") { toggleBold() }
}
ToolbarItem(id: "italic", placement: .automatic) {
Button("Italic", systemImage: "italic") { toggleItalic() }
}
}
.toolbarRole(.editor)
```
## Sidebar Column Width
```swift
NavigationSplitView {
SidebarView()
.navigationSplitViewColumnWidth(min: 180, ideal: 220, max: 300)
} content: {
ContentList()
.navigationSplitViewColumnWidth(min: 250, ideal: 300)
} detail: {
DetailView()
}
```
## Adaptive Sizing
```swift
GeometryReader { geometry in
let columns = geometry.size.width > 800
? [GridItem(.adaptive(minimum: 200))]
: [GridItem(.adaptive(minimum: 150))]
LazyVGrid(columns: columns) {
ForEach(items) { item in
ItemCard(item: item)
}
}
}
```
## Dynamic Type + Accessibility
```swift
@Environment(\.dynamicTypeSize) var dynamicTypeSize
var body: some View {
VStack(spacing: AppTheme.Spacing.medium) {
Text(title)
.font(AppTheme.Fonts.headline)
Text(subtitle)
.font(AppTheme.Fonts.body)
}
.padding(AppTheme.Spacing.large)
}
```
## Safe Areas
macOS windows have title bar inset and traffic light buttons area:
```swift
VStack {
content
}
.padding() // Respect default window padding
```
## File Handling (Open/Save Panels)
```swift
.fileImporter(
isPresented: $showImporter,
allowedContentTypes: [.json, .plainText]
) { result in
handleImport(result)
}
.fileExporter(
isPresented: $showExporter,
document: myDocument,
contentType: .json
) { result in
handleExport(result)
}
```
## NOT Available on macOS
- No device rotation — desktop has resizable windows
- No `.edgesIgnoringSafeArea` patterns for notch/Dynamic Island
- No status bar customization
- No `UIScreen.main.bounds` — use GeometryReader or window sizing
## Rules
1. Use `.defaultSize(width:height:)` for initial window dimensions
2. Use `.windowResizability(.contentMinSize)` for resizable windows with minimums
3. Use `.toolbar {}` with placement for toolbar items
4. Use `.toolbarRole(.editor)` for user-customizable toolbars
5. Use `.navigationSplitViewColumnWidth()` to control sidebar widths
6. Design for resizable windows — never assume fixed dimensions
7. Use AppTheme spacing tokens for consistent layout
8. Use `.fileImporter()` / `.fileExporter()` for open/save panels
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