Route icon results through UI events (T-607)

app-win7/cmd/softbox/main.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"context"
+	"errors"
 	"log"
 	"os"
 
@@ -11,8 +13,11 @@ import (
 	"softbox.local/app-win7/platform/windows"
 	softboxgio "softbox.local/app-win7/ui/gio"
 	"softbox.local/core"
+	"softbox.local/core/application"
 )
 
+const applicationEventCapacity = 32
+
 func main() {
 	go func() {
 		if err := run(); err != nil {
@@ -33,6 +38,31 @@ func run() error {
 
 	theme := softboxgio.NewTheme()
 	shell := softboxgio.NewAppShell(string(platform.Edition()))
+	runtime := application.NewRuntime(applicationEventCapacity)
+	relay, err := application.NewEventRelay(applicationEventCapacity)
+	if err != nil {
+		return err
+	}
+	eventContext, cancelEvents := context.WithCancel(context.Background())
+	pumpDone := make(chan error, 1)
+	go func() {
+		pumpDone <- application.PumpEvents(
+			eventContext,
+			runtime.Events(),
+			relay,
+			window.Invalidate,
+		)
+	}()
+	defer func() {
+		cancelEvents()
+		runtime.Close()
+		relay.Close()
+		if pumpErr := <-pumpDone; pumpErr != nil &&
+			!errors.Is(pumpErr, context.Canceled) &&
+			!errors.Is(pumpErr, application.ErrEventRelayClosed) {
+			log.Printf("application event pump stopped: %v", pumpErr)
+		}
+	}()
 	var operations op.Ops
 
 	for {
@@ -40,6 +70,9 @@ func run() error {
 		case app.DestroyEvent:
 			return event.Err
 		case app.FrameEvent:
+			if err := relay.Drain(shell.ApplyEvent); err != nil {
+				log.Printf("apply application event: %v", err)
+			}
 			context := app.NewContext(&operations, event)
 			shell.Layout(context, theme)
 			event.Frame(context.Ops)