Slider

The slider widget allows a user to choose a number by dragging a handle between two fixed values. Create one using widget.NewSlider() which takes the float64 minimum and maximum of the range. Read the chosen number from the Value field, or set it to move the handle from your code.

The Step field controls how far the handle moves at a time, it defaults to 1 so remember to set a smaller value if you want a fine-grained range such as 0 to 1. To lay the widget out vertically set the Orientation field to widget.Vertical.

Two callbacks are available. OnChanged is called for every value the slider passes through as the user drags, which is useful for live previews. OnChangeEnded is called once the user releases the handle, which is a better place to trigger anything expensive.

A slider can also be connected to a data binding using widget.NewSliderWithData(), passing a binding.Float.

  package main

import (
	"log"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/widget"
)

func main() {
	myApp := app.New()
	myWindow := myApp.NewWindow("Slider Widget")

	slide := widget.NewSlider(0, 100)
	slide.Step = 5
	slide.OnChangeEnded = func(value float64) {
		log.Println("Slider set to", value)
	}

	myWindow.SetContent(slide)
	myWindow.Resize(fyne.NewSize(200, 100))
	myWindow.ShowAndRun()
}