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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.

[sourcecode lang=”go” autolinks=”false” classname=”myclass” collapse=”false” firstline=”1″ gutter=”true” highlight=”1-3,6,9″ htmlscript=”false” light=”false” padlinenumbers=”false” smarttabs=”true” tabsize=”4″ toolbar=”false” title=”Source Code main.go”] 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()
}

[/sourcecode] [easy_media_download url=”http://blogvali.com/wp-content/uploads/fyne-golang-downloads/main14.go” text=”Download Code” color=”red_darker”]