golang implements gui programming

With the rapid development of the Internet, more and more applications are beginning to move toward mobile and Web terminals, which also puts forward higher requirements for application development. GUI programming has always been an important issue that developers need to face, and the emergence of the golang language provides a brand new way for GUI programming.

Golang, also called Go, is a brand new programming language released by Google. As an excellent language, it has many advantages such as multi-threading, high concurrency, fast compilation, etc., and it also performs well in terms of performance. Because the Golang language is lightweight, efficient, simple and easy to learn, it is increasingly favored by developers and has become one of the main languages ​​​​for development in the new era.

In terms of GUI programming, Golang is implemented through the support of some libraries. The following will introduce some commonly used GUI development libraries in Golang and their specific implementation methods.

1. Go-GTK

Go-GTK is a GTK 3 binding library in Golang that provides an easy way to create GUI applications. GTK is a popular cross-platform graphical user interface toolkit widely used in Linux operating systems. Through Go-GTK, we can develop GTK-based GUI applications on multiple platforms such as Windows, Mac OS X, and Linux.

The following is the code to create a simple GUI using Go-GTK:

package main

import (
    "github.com/gotk3/gotk3/gtk"
)

func main() {
    gtk.Init(nil)
    win, _ := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
    win.SetTitle("Hello World")
    win.Connect("destroy", func() {
        gtk.MainQuit()
    })
    win.ShowAll()
    gtk.Main()
}

With this code, we can create a window containing a title "Hello World", and after closing the window Exit the application.

2. Walk

Walk is a cross-platform GUI library that enables the development of form-based applications on Windows, Mac OS X and Linux. It provides a rich set of controls, including labels, text boxes, buttons, progress bars, and more.

The following is the code to create a simple GUI using Walk:

package main

import (
    "github.com/lxn/walk"
)

func main() {
    mainWindow, _ := walk.NewMainWindow()
    mainWindow.SetTitle("Hello World")

    label, _ := walk.NewLabel(mainWindow)
    label.SetText("Hello, World!")
    label.SetBounds(walk.Rectangle{10, 10, 100, 30})

    mainWindow.Show()
    walk.Run()
}

With this code, we can create a window containing a label and display "Hello, World!" in the label.

3. Gio

Gio is an OpenGL-based GUI library that can create GUI programs for different platforms. It provides functions such as layout, event management, animation, etc., supports cross-platform and high performance, and Gio also has good mobile device support.

The following is the code to create a simple GUI using Gio:

package main

import (
    "image"
    "log"
    "os"

    "gioui.org/app"
    "gioui.org/io/system"
    "gioui.org/layout"
    "gioui.org/widget"
    "gioui.org/widget/material"
)

func main() {
    go func() {
        w := app.NewWindow()
        th := material.NewTheme()

        var hello widget.Clickable

        for {
            select {
            case e := <-w.Events():
                switch e := e.(type) {
                case system.DestroyEvent:
                    os.Exit(0)
                case system.FrameEvent:
                    gtx := layout.NewContext(&ops, e)
                    material.H2(th, "Hello, Gio!").Layout(gtx)
                    if hello.Button(gtx, "Say Hello!") {
                        log.Println("Hello, Gio!")
                    }
                    e.Frame(gtx.Ops)
                }
            }
        }
    }()
    app.Main()
}

With this code, we can create a window containing a "Say Hello!" button and output it after clicking the button "Hello, Gio!" log information.

Summary

With the rapid popularity of Golang language and the increasing demand for GUI programming, more and more GUI development libraries are moving closer to Golang. Go-GTK, Walk and Gio have also become the most popular and respected GUI libraries among developers. These libraries not only provide a convenient GUI development method, but also are lightweight, fast to develop, easy to use and powerful, and are more suitable for high-performance and high-concurrency application development.

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