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Class 14 Funny Project – Traffic Lights – Fyne GUI Golang

This is traffic light Project in Fyne and GoLang.

Though it is just show off and not a tutorial.

But you will enjoy coding it.

package main

// import Fyne
import (
	"fmt"
	"image/color"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/canvas"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/layout"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
)

func main() {
	var x uint8 = 0

	a := app.New()

	w := a.NewWindow("Traffic Lights Project")
	w.Resize(fyne.NewSize(400, 400))
	fyne.CurrentApp().Settings().SetTheme(theme.DarkTheme())

	rect1 := canvas.NewCircle(color.NRGBA{R: 255, G: 255, B: 255, A: 255})
	rect1.Resize(fyne.NewSize(50, 50))
	rect2 := canvas.NewCircle(color.NRGBA{R: 255, G: 255, B: 255, A: 255})
	rect2.Resize(fyne.NewSize(50, 50))
	rect3 := canvas.NewCircle(color.NRGBA{R: 255, G: 255, B: 255, A: 255})
	rect3.Resize(fyne.NewSize(50, 50))

	btnR := widget.NewButton("Red", func() {
		fmt.Printf("%t", true)

		Reset(rect1, rect2, rect3)
		rect1.FillColor = color.NRGBA{R: incrementMove(x), G: 0, B: 0, A: 255}
		rect1.Refresh()
	})
	btnG := widget.NewButton("Green", func() {

		Reset(rect1, rect2, rect3)
		rect2.FillColor = color.NRGBA{R: 0, G: incrementMove(x), B: 0, A: 255}
		rect2.Refresh()
	})
	btnB := widget.NewButton("Blue", func() {

		Reset(rect1, rect2, rect3)
		rect3.FillColor = color.NRGBA{R: 0, G: 0, B: incrementMove(x), A: 255}
		rect3.Refresh()
	})

	btnReset := widget.NewButton("Reset", func() {

		rect1.FillColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
		rect2.FillColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
		rect3.FillColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
		rect1.Refresh()
		rect2.Refresh()
		rect3.Refresh()
	})

	w.SetContent(
		container.NewHSplit(
			container.NewGridWithRows(

				7,

				layout.NewSpacer(),
				rect1,
				layout.NewSpacer(),
				rect2,
				layout.NewSpacer(),
				rect3,
				layout.NewSpacer(),
			),

			container.NewGridWithRows(
				9,
				layout.NewSpacer(),
				btnR,

				btnG,

				btnB,

				btnReset,
				layout.NewSpacer(),
			),
		),
	)
	w.ShowAndRun()
}
func incrementMove(x uint8) (a uint8) {
	if x == 255 {
		x = 0
	} else if x == 0 {
		x = 255
	}

	return x
}

func Reset(rect1, rect2, rect3 *canvas.Circle) {

	rect1.FillColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
	rect2.FillColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
	rect3.FillColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
	rect1.Refresh()
	rect2.Refresh()
	rect3.Refresh()
}

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