Go語言開發GUI程序

簡介

推薦跨平台的flyne來編寫go語言的GUI程序，無任何依賴

賴得翻譯了，直接貼文了。
About

Fyne is an easy-to-use UI toolkit and app API written in Go. It is designed to build applications that run on desktop and mobile devices with a single codebase.

Version 2.1 is the current release of the Fyne API, it introduced RichText and the DocTabs container, as well as the document storage API and FyneApp.toml metadata support. We are now working towards the next big release, codenamed bowmore and more news will follow in our news feeds and GitHub project.

Prerequisites

To develop apps using Fyne you will need Go version 1.12 or later, a C compiler and your system's development tools. If you're not sure if that's all installed or you don't know how then check out our Getting Started document.

Using the standard go tools you can install Fyne's core library using:

$ go get fyne.io/fyne/v2

中文亂碼處理

// Package main provides various examples of Fyne API capabilities
package main

import (
	"fmt"
	"net/url"
	"os"

	"fyne.io/fyne"
	"fyne.io/fyne/app"
	"fyne.io/fyne/canvas"
	"fyne.io/fyne/cmd/fyne_demo/data"
	"fyne.io/fyne/layout"
	"fyne.io/fyne/theme"
	"fyne.io/fyne/widget"
)

const preferenceCurrentTab = "currentTab"

func parseURL(urlStr string) *url.URL {
	link, err := url.Parse(urlStr)
	if err != nil {
		fyne.LogError("Could not parse URL", err)
	}

	return link
}

func welcomeScreen(a fyne.App) fyne.CanvasObject {
	logo := canvas.NewImageFromResource(data.FyneScene)
	logo.SetMinSize(fyne.NewSize(228, 167))

	return widget.NewVBox(
		widget.NewLabelWithStyle("Welcome to the Fyne toolkit demo app", fyne.TextAlignCenter, fyne.TextStyle{Bold: true}),
		layout.NewSpacer(),
		widget.NewHBox(layout.NewSpacer(), logo, layout.NewSpacer()),

		widget.NewHBox(layout.NewSpacer(),
			widget.NewHyperlink("fyne.io", parseURL("https://fyne.io/")),
			widget.NewLabel("-"),
			widget.NewHyperlink("documentation", parseURL("https://fyne.io/develop/")),
			widget.NewLabel("-"),
			widget.NewHyperlink("sponsor", parseURL("https://github.com/sponsors/fyne-io")),
			layout.NewSpacer(),
		),
		layout.NewSpacer(),

		widget.NewGroup("Theme",
			fyne.NewContainerWithLayout(layout.NewGridLayout(2),
				widget.NewButton("Dark", func() {
					a.Settings().SetTheme(theme.DarkTheme())
				}),
				widget.NewButton("Light", func() {
					a.Settings().SetTheme(theme.LightTheme())
				}),
			),
		),
	)
}

func main() {

	// Mac 查看中文字體 fc-list :lang=zh
	// /System/Library/Fonts/STHeiti Medium.ttc
	// 設置FYNE_FONT環境變量，解決中文亂碼問題
	os.Setenv("FYNE_FONT", "/System/Library/Fonts/STHeiti Medium.ttc")

	a := app.NewWithID("io.fyne.demo")
	a.SetIcon(theme.FyneLogo())

	w := a.NewWindow("Fyne Demo")
	w.SetMainMenu(fyne.NewMainMenu(fyne.NewMenu("File",
		fyne.NewMenuItem("New", func() { fmt.Println("Menu New") }),
		// a quit item will be appended to our first menu
	), fyne.NewMenu("Edit",
		fyne.NewMenuItem("Cut", func() { fmt.Println("Menu Cut") }),
		fyne.NewMenuItem("Copy", func() { fmt.Println("Menu Copy") }),
		fyne.NewMenuItem("Paste", func() { fmt.Println("Menu Paste") }),
	)))
	w.SetMaster()

	tabs := widget.NewTabContainer(
		widget.NewTabItemWithIcon("Welcome", theme.HomeIcon(), welcomeScreen(a)),
		widget.NewTabItemWithIcon("Widgets哈哈", theme.ContentCopyIcon(), welcomeScreen(a)),
	)
	tabs.SetTabLocation(widget.TabLocationLeading)
	tabs.SelectTabIndex(a.Preferences().Int(preferenceCurrentTab))
	w.SetContent(tabs)

	w.ShowAndRun()
	a.Preferences().SetInt(preferenceCurrentTab, tabs.CurrentTabIndex())
}