fyne v2 free drawing example

fyne_free_draw.go

package main

import (
	"image/color"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/canvas"
	"fyne.io/fyne/v2/container"
)

func main() {
	myApp := app.New()
	myWindow := myApp.NewWindow("Canvas")
	myCanvas := myWindow.Canvas()

	myWidget := container.NewWithoutLayout()

	blue := color.NRGBA{R: 0, G: 0, B: 180, A: 255}
	rect := canvas.NewRectangle(blue)
	myWidget.Add(rect)
	rect.Resize(fyne.NewSize(100, 100))

	line := canvas.NewLine(color.Black)
	line.Position1 = fyne.NewPos(0, 0)
	line.Position2 = fyne.NewPos(100, 100)
	line.StrokeWidth = 5
	myWidget.Add(line)

	myCanvas.SetContent(myWidget)
	myWindow.Resize(fyne.NewSize(100, 100))
	myWindow.ShowAndRun()
}