Simple App for GoMobile, that logs lifecycle and paints events for debugging purposes

main.go

// +build darwin linux

package main

import "fmt"

import "golang.org/x/mobile/app"
import "golang.org/x/mobile/event/lifecycle"
import "golang.org/x/mobile/event/paint"

func main() {
	app.Main(func(a app.App) {
		// each posible lyfecycle stage
		stages := []lifecycle.Stage{lifecycle.StageDead, lifecycle.StageAlive, lifecycle.StageVisible, lifecycle.StageFocused}
		for e := range a.Events() {
			// when an events come's
			switch e := a.Filter(e).(type) {
			case lifecycle.Event:
				// if it's a lifecycle status event
				for _, stage := range stages {
					// log each state
					fmt.Println(stage, e.Crosses(stage))
				}
			case paint.Event:
				// if it's a paint event, log it
				if e.External {
					fmt.Println("paint external")
				} else {
					fmt.Println("paint internal")
				}
				a.Publish()
			}
		}
	})
}