Responsive GNOME layouts: AdwBreakpoint conditions, BreakpointBin, MultiLayoutView, BottomSheet, narrow/wide layout swaps. Use when making an app work on phones or narrow windows.
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Use AdwBreakpointBin and set properties at breakpoints:
Adw.BreakpointBin {
width-request: 300;
height-request: 200;
Adw.Breakpoint {
condition ("max-width: 500sp")
setters {
header_bar.title-widget: null; /* hide ViewSwitcher */
view_switcher_bar.reveal: true; /* show bottom bar */
some_row.compact: true; /* compact custom rows */
}
}
child: Adw.ToolbarView { /* content */ };
}
Use AdwMultiLayoutView with completely different layouts:
<object class="AdwMultiLayoutView">
<child>
<object class="AdwLayout">
<property name="name">wide</property>
<!-- Full desktop layout with sidebar -->
</object>
</child>
<child>
<object class="AdwLayout">
<property name="name">narrow</property>
<!-- Compact layout with bottom sheet -->
</object>
</child>
</object>
<object class="AdwBreakpoint">
<condition>max-width: 650sp</condition>
<setter object="multi_layout" property="layout-name">narrow</setter>
</object>
| Condition | App | Effect |
|---|---|---|
max-width: 400sp | Text Editor | Buttons become icon-only |
max-width: 500sp | Settings | ViewSwitcherBar revealed |
max-width: 590sp | Loupe | Layout switches to narrow |
max-width: 600sp | Clocks | ViewSwitcherBar revealed |
max-width: 650sp | Text Editor | Full layout switch |
min-width: 590sp | Loupe | Layout switches to wide |
sp = scaled pixels (font-relative, respects accessibility).
| Desktop (wide) | Mobile (narrow) |
|---|---|
AdwViewSwitcher in header bar | AdwViewSwitcherBar at bottom |
AdwOverlaySplitView sidebar | AdwBottomSheet |
| Label + Icon buttons | Icon-only buttons |
| Grid with 3 columns | Grid with 1-2 columns |
margin-start/end: 20 | margin-start/end: 8 |
<object class="AdwBottomSheet">
<property name="open" bind-source="toggle_btn" bind-property="active" bind-flags="bidirectional|sync-create"/>
<property name="content"><!-- main content --></property>
<property name="sheet"><!-- sidebar content --></property>
</object>
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Add a standard AdwAboutDialog wired to app metadata, plus the AppStream metainfo file it should share data with. Use when adding an About entry, release notes, credits, or preparing app metadata.
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Make a GTK4/libadwaita app accessible — accessible labels and roles, tooltips on icon-only buttons, keyboard navigation, contrast, and testing with Orca/Accerciser. Use when fixing a11y issues or running the accessibility category of a HIG audit.
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Onboarding tour with AdwCarousel and navigation dots, skippable welcome screens. Use when adding a first-run tour or feature showcase to a GNOME app.
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Implement GNOME's 4-tier destructive-action pattern: undo toasts instead of confirmation dialogs, AdwAlertDialog for irreversible actions. Use when adding delete, remove, clear, or other destructive actions.
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Loading, empty, and error states with AdwStatusPage and AdwSpinner — placeholder icons, titles, action buttons. Use when an app view can be empty, loading, or failed.
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Package a GNOME app as a Flatpak — manifest for the GNOME runtime, sandbox permissions, build/run/test loop, and Flathub submission checklist. Use when packaging, distributing, or preparing a GNOME app for Flathub.
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