go-widgets/gallery

Live wasm demo of go-widgets/toolkit.

Deploys to https://go-widgets.github.io/gallery/ on every push to main (see .github/workflows/pages.yml).

Local dev

pkgx task build   # compiles gallery.wasm + copies wasm_exec.js
pkgx task serve   # http://localhost:8090/

The gallery uses a plain <canvas> + putImageData — no SharedArrayBuffer, no COOP/COEP, no server-side dep. That makes it easy to iframe from any static host (python3 -m http.server, GitHub Pages, S3, ...).

Native controls gallery

The wasm page above shows the toolkit's drawn widgets. Its native mirror shows the same widget set as the platform's own controls — one toolkit.NativeControl descriptor per NativeKind, hosted by go-widgets/window's cocoa / win32 / gtk back-end (real NSButton/GtkEntry/… over the framebuffer), pure Go, CGO_ENABLED=0.

go build -tags gallerynative -o gallery-native .
./gallery-native                     # macOS / Windows
GO_WIDGETS_GTK=1 ./gallery-native    # Linux (GTK4-hosted back-end)

native.go builds the descriptor grid (tag-less, 100%-tested); native_main.go (behind the gallerynative tag, so the wasm build and the coverage-gated tests never pull in the windowing stack) opens the window and runs it.

Layout

scene.go composes widgets from the toolkit onto a 960-wide surface whose height is computed from the box-layout content (no hard-coded height — the canvas grows as widgets are added) as a three-column card grid plus a full-width band, every widget kind in its own labelled slot rather than being hidden behind a tab. Around it:

• MenuBar (File / Edit / View / Help) — clicking a name opens a popover the host paints under it.
• Toolbar (New / Open / Save / … / About) — each click fires a Notification toast.
• Statusbar — 4-segment readout at the bottom.
• Notification — top-right toast, auto-dismisses via a 60 Hz setInterval that calls state.tick().

The scene composes the full toolkit catalogue (~98 widgets across the v0.7–v0.85 waves) into labelled slots — leaf widgets, the container/layout system (VBox/HBox/Grid/Frame/Border/Paned), and the Wave-7 dashboard widgets (Kanban, Gantt, Agenda, Sparkline, Area/ Scatter/Radar charts).

Interactions

The gallery is a demonstrator you drive, not just look at:

• Drag — Kanban cards move between columns; Gantt bars move, and their edges resize (mousedown→mousemove→mouseup routed through a scene drag-capture into the widgets' EventClick/EventMouseDrag/ EventMouseUp).
• Right-click edit menu — a ContextMenu on every editable widget (Kanban card, Gantt task, Agenda day, ListBox item, Table row, TreeView / TreeTable node, PropertyGrid row): move / duplicate / delete / add-child / … The scene hit-tests via the toolkit's exported CardAt/TaskAt/DayAt/IndexAt/RowAt/NodeAt helpers.
• Agenda — a Week/Month/Quarter/Year switcher; click (or right- click) an empty day to add an event.
• Theme switcher — recolours the whole scene (Light/Dark/Adwaita/ WhiteSur) by swapping one Theme value.
• Full window — the ⛶ button (or double-click) expands the canvas to fill the browser window in a scrollable overlay; Esc exits. It is deliberately not the OS Fullscreen API — it stays inside the browser window.

Interactive state flows through go-widgets/mvvm: the theme and Agenda-view switchers are two-way-bound Observables, the Agenda events an ObservableList mirrored into the widget, and the command palette a Command (see viewmodel.go).

The SVG-per-widget variant of the same catalogue (43 widgets, one .svg + .png each) is available at https://go-widgets.github.io/svg/ via go-widgets/svg's gallery-render command, which is regenerated on every toolkit dep bump.

License

BSD-3-Clause.