5 Ways To Build Gui Apps With Fyne By Andrew Williams

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Building GUI apps can be a daunting task, especially for developers who are new to the field. However, with the right tools and frameworks, creating GUI apps can be a breeze. One such framework is Fyne, an open-source toolkit for building GUI apps in Go. In this article, we will explore five ways to build GUI apps with Fyne.

What is Fyne?

Fyne is a cross-platform GUI toolkit written in Go. It allows developers to build GUI apps that can run on multiple platforms, including Windows, macOS, and Linux. Fyne is designed to be easy to use and provides a simple, yet powerful API for building GUI apps.

Advantages of Using Fyne

Before we dive into the five ways to build GUI apps with Fyne, let's take a look at some of the advantages of using this framework. Here are a few:

• Cross-platform compatibility: Fyne allows you to build GUI apps that can run on multiple platforms, including Windows, macOS, and Linux.
• Easy to use: Fyne has a simple and intuitive API that makes it easy to build GUI apps.
• Fast and efficient: Fyne is built on top of Go, which means that it inherits Go's speed and efficiency.
• Extensive library: Fyne has an extensive library of widgets and tools that make it easy to build complex GUI apps.

1. Building a Simple GUI App with Fyne

Let's start with a simple example. In this section, we will build a basic GUI app with Fyne. Here's the code:

package main

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

func main() {
	a := app.New()
	w := a.NewWindow("Hello World")

	label := widget.NewLabel("Hello World!")
	w.SetContent(label)

	w.ShowAndRun()
}

This code creates a new GUI app with a single window that displays the text "Hello World!". The app.New() function creates a new Fyne app, and the a.NewWindow() function creates a new window. The widget.NewLabel() function creates a new label widget, and the w.SetContent() function sets the content of the window to the label.

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2. Building a GUI App with Buttons

In this section, we will build a GUI app with buttons. Here's the code:

package main

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

func main() {
	a := app.New()
	w := a.NewWindow("Button App")

	btn := widget.NewButton("Click me!", func() {
		println("Button clicked!")
	})
	w.SetContent(btn)

	w.ShowAndRun()
}

This code creates a new GUI app with a single window that displays a button. The widget.NewButton() function creates a new button widget, and the w.SetContent() function sets the content of the window to the button. The button has a callback function that prints a message to the console when clicked.

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3. Building a GUI App with Text Input

In this section, we will build a GUI app with text input. Here's the code:

package main

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

func main() {
	a := app.New()
	w := a.NewWindow("Text Input App")

-entry := widget.NewEntry()
	entry.SetPlaceHolder("Enter your name...")
	w.SetContent(entry)

	w.ShowAndRun()
}

This code creates a new GUI app with a single window that displays a text input field. The widget.NewEntry() function creates a new text input widget, and the w.SetContent() function sets the content of the window to the text input field.

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4. Building a GUI App with Lists

In this section, we will build a GUI app with lists. Here's the code:

package main

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

func main() {
	a := app.New()
	w := a.NewWindow("List App")

	list := widget.NewList(
		[]string{"Item 1", "Item 2", "Item 3"},
		func() fyne.CanvasObject {
			return widget.NewLabel("Item")
		},
		func(id widget.ListItemID, item fyne.CanvasObject) {
			item.(*widget.Label).SetText("Item " + fmt.Sprintf("%d", id))
		},
	)

	w.SetContent(list)

	w.ShowAndRun()
}

This code creates a new GUI app with a single window that displays a list of items. The widget.NewList() function creates a new list widget, and the w.SetContent() function sets the content of the window to the list.

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5. Building a GUI App with Menus

In this section, we will build a GUI app with menus. Here's the code:

package main

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/menu"
)

func main() {
	a := app.New()
	w := a.NewWindow("Menu App")

	menu := fyne.NewMenu(
		"File",
		fyne.NewMenuItem("Open", func() { println("Open menu item clicked!") }),
		fyne.NewMenuItem("Save", func() { println("Save menu item clicked!") }),
	)

	w.SetMainMenu(menu)

	w.ShowAndRun()
}

This code creates a new GUI app with a single window that displays a menu. The fyne.NewMenu() function creates a new menu, and the w.SetMainMenu() function sets the main menu of the window to the menu.

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Gallery of Fyne Apps

FAQ

In conclusion, building GUI apps with Fyne is a straightforward process that requires creating a new Fyne app, creating a new window, and setting the content of the window to a widget. With Fyne, you can build complex GUI apps with ease, and the framework provides several advantages, including cross-platform compatibility, ease of use, and speed.