How to write interface program in golang

How to use Go to write interface programs

Introduction
Go is a popular programming language that is mainly used for server-side development. However, Go also supports the use of third-party libraries to create programs with graphical user interfaces (GUIs). This article will introduce how to use Go to write interface programs.

Step 1: Choose a GUI library
First, you need to choose a library for creating GUI. Popular GUI libraries available in Go include:

• [GoGi](https://github.com/go-kirin/go-kirin)
• [Fyne](https: //github.com/fyne-io/fyne)
• [Glui](https://github.com/AllenDang/glui)

Step 2: Installation Libraries
Install the required GUI libraries using the Go module system:

<code>go mod tidy</code>

Step 3: Create the window
Next, create the window using the selected GUI library :

GoGi Example:

<code class="go">import (
    "github.com/go-kirin/go-kirin"
)

func main() {
    win := kirin.NewWindow("Hello World", 600, 400)
    win.Show()
    win.Run()
}</code>

Fyne Example:

<code class="go">import (
    "github.com/fyne-io/fyne"
)

func main() {
    app := fyne.NewApp("Hello World")
    app.SetIcon(resourceAppIconPng)
    w := app.NewWindow("Hello World")
    w.Resize(fyne.Size{Width: 600, Height: 400})
    w.ShowAndRun()
}</code>

Step 4: Add Control
Then, add controls to the window, such as buttons, labels, and text input boxes:

GoGi example:

<code class="go">func main() {
    ...
    button := kirin.NewButton("Click Me")
    label := kirin.NewLabel("Hello, World!")
    edit := kirin.NewTextBox()
    win.SetChild(kirin.Stack().AddChildren(button, label, edit))
    ...
}</code>

Fyne example:

<code class="go">func main() {
    ...
    button := fyne.NewButton("Click Me")
    label := fyne.NewLabel("Hello, World!")
    edit := fyne.NewEntry()
    w.SetContent(fyne.Container.NewVBox(button, label, edit))
    ...
}</code>

Step 5: Handling Events
Finally, user events can be handled, such as button clicks or text input:

GoGi Example:

<code class="go">func main() {
    ...
    button.OnClicked(func(e *kirin.MouseEvent) {
        label.SetText("Clicked!")
    })
    ...
}</code>

Fyne Example:

<code class="go">func main() {
    ...
    button.OnTapped = func() {
        label.SetText("Clicked!")
    }
    ...
}</code>

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