Counter

class MyApp extends App{
	
	counter = 0
	
	createStartPage(){
		return CounterPage
	}
	
	incrementCounter(){
		a.counter += 1
	}
	
	decrementCounter(){
		a.counter -= 1
	}
	
	resetCounter(){
		a.counter = 0
	}
	
}

class CounterPage extends Page{
	createGui(){
		return Rows.children(
			Text.text(`${a.counter}`).grow(1),
			Columns.grow(1).children(
				Rows.grow(1).children(
					Button.text(`-`).grow(1).onClick(a.decrementCounter),
					Button.text(`Reset`).grow(1).onClick(a.resetCounter),
				),
				Button.text(`+`).grow(1).onClick(a.incrementCounter),
			),
		)
	}
}