main.go

package main

import (
	"flag"
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/layout"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
	"github.com/golang/glog"
	"github.com/zzu-andrew/net_utils/window"
)

const preferenceCurrentTutorial = "currentTutorial"

func main() {
	// 参数解析
	flag.Parse()
	defer glog.Flush()

	netUtils := window.NewNetUtils()

	content := container.NewMax()
	title := widget.NewLabel("Component name")
	intro := widget.NewLabel("An introduction would probably go\nhere, as well as a")
	intro.Wrapping = fyne.TextWrapWord

	setTutorial := func(t window.Tutorial) {

		title.SetText(t.Title)
		intro.SetText(t.Intro)

		content.Objects = []fyne.CanvasObject{t.View(netUtils, netUtils.GetWin())}
		content.Refresh()
	}

	tutorial := container.NewBorder(
		container.NewVBox(title, widget.NewSeparator(), intro), nil, nil, nil, content)

	split := container.NewHSplit(makeNav(setTutorial, true), tutorial)
	split.Offset = 0.2

	netUtils.GetWin().SetContent(container.NewBorder(nil, netUtils.NewStatusBar(), nil, nil, container.NewPadded(split)))

	netUtils.GetWin().Resize(fyne.NewSize(640, 460))
	netUtils.GetWin().ShowAndRun()
}

func makeNav(setTutorial func(tutorial window.Tutorial), loadPrevious bool) fyne.CanvasObject {
	a := fyne.CurrentApp()

	tree := &widget.Tree{
		ChildUIDs: func(uid string) []string {
			return window.TutorialIndex[uid]
		},
		IsBranch: func(uid string) bool {
			children, ok := window.TutorialIndex[uid]

			return ok && len(children) > 0
		},
		CreateNode: func(branch bool) fyne.CanvasObject {
			return widget.NewLabel("Collection Widgets")
		},
		UpdateNode: func(uid string, branch bool, obj fyne.CanvasObject) {
			t, ok := window.Tutorials[uid]
			if !ok {
				fyne.LogError("Missing tutorial panel: "+uid, nil)
				return
			}
			obj.(*widget.Label).SetText(t.Title)
		},
		OnSelected: func(uid string) {
			if t, ok := window.Tutorials[uid]; ok {
				a.Preferences().SetString(preferenceCurrentTutorial, uid)
				setTutorial(t)
			}
		},
	}

	if loadPrevious {
		currentPref := a.Preferences().StringWithFallback(preferenceCurrentTutorial, "welcome")
		tree.Select(currentPref)
	}

	themes := container.New(layout.NewGridLayout(2),
		widget.NewButton("Dark", func() {
			a.Settings().SetTheme(theme.DarkTheme())
		}),
		widget.NewButton("Light", func() {
			a.Settings().SetTheme(theme.LightTheme())
		}),
	)

	return container.NewBorder(nil, themes, nil, nil, tree)
}