Suriyakumarvijayanayagam
50a843ce46
The window hides to the tray on close, so the natural next step for a shop assistant is to double-click the shortcut again. That started a second full copy of the app: a second tray icon, a second engine supervisor on the same SQLite WAL and the same port - the start-twice failure the agent package was built to prevent, on the one binary that never had the guard. Seen on a Windows install as a row of tray icons. Wails' SingleInstanceLock now hands the second launch to the first process, which brings its window to the front. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KGcjxF1cNLcuwc3DAPcnfj
92 lines
3.0 KiB
Go
92 lines
3.0 KiB
Go
// Command behavision-desktop is the store-facing application: a tray icon, a
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// window, and the supervisor for the recognition engine.
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//
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// It is one process rather than three because the tray, the window and the
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// supervisor all need the same state, and because a user who quits the tray
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// expects recognition to stop. It is deliberately NOT a Windows service: a
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// service runs in session 0 and cannot draw a tray icon, and spawning a child
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// process needs no elevation while controlling a service does.
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package main
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import (
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"context"
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"embed"
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"log"
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"github.com/wailsapp/wails/v2"
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"github.com/wailsapp/wails/v2/pkg/options"
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"github.com/wailsapp/wails/v2/pkg/options/assetserver"
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"github.com/wailsapp/wails/v2/pkg/options/windows"
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"github.com/wailsapp/wails/v2/pkg/runtime"
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)
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//go:embed all:frontend/dist
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var assets embed.FS
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func main() {
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app := NewApp()
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tray := newTray(app)
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// One process per PC, enforced by the OS rather than by hoping.
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//
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// The window hides to the tray on close, so the ordinary next thing a shop
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// assistant does is double-click the desktop shortcut again to get it
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// back. Without this lock that started a SECOND complete copy: a second
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// tray icon, a second engine supervisor on the same SQLite WAL and the
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// same port - the "start twice" failure the agent package exists to
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// prevent, on the one binary that never had the guard. Seen on a Windows
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// install as a row of Behavision icons in the tray. A second launch now
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// only brings the existing window to the front, which is what the person
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// wanted in the first place.
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var ctxRef context.Context
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single := &options.SingleInstanceLock{
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UniqueId: "ai.loyaly.behavision.desktop",
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OnSecondInstanceLaunch: func(options.SecondInstanceData) {
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if ctxRef != nil {
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runtime.Show(ctxRef)
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runtime.WindowUnminimise(ctxRef)
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}
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},
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}
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err := wails.Run(&options.App{
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SingleInstanceLock: single,
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Title: "Behavision",
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Width: 1280,
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Height: 820,
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// Small enough to still be usable on a cramped shop-counter monitor.
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MinWidth: 1024,
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MinHeight: 640,
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AssetServer: &assetserver.Options{Assets: assets},
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// Closing the window hides it rather than quitting: the engine must
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// keep recognising after a shop assistant clicks the X, and the tray
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// is where they get the window back.
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HideWindowOnClose: true,
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OnStartup: func(ctx context.Context) {
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ctxRef = ctx
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app.startup(ctx)
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tray.start(ctx)
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},
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OnBeforeClose: func(ctx context.Context) bool {
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runtime.Hide(ctx)
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return true // prevent the close
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},
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OnShutdown: func(ctx context.Context) {
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tray.stop()
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app.proxy.stop()
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app.StopEngine()
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},
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Bind: []any{app},
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Windows: &windows.Options{
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WebviewIsTransparent: false,
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WindowIsTranslucent: false,
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// A shop PC is not a developer machine; a stray right-click that
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// opens devtools looks like the software is broken.
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DisableWindowIcon: false,
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},
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})
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if err != nil {
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log.Fatalf("behavision-desktop: %v", err)
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}
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}
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