gallery.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"strings"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/dialog"

	"fyne.io/fyne/v2/canvas"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/widget"
)

func showGalleryApp() {
	w := myapp.NewWindow("ImageViewer")
	w.Resize(fyne.NewSize(800, 600))
	var root_src string
	selectFolderButton := widget.NewButton("Select target folder", func() {
		dialog.NewFolderOpen(func(dir fyne.ListableURI, err error) {
			if err == nil && dir.Name() != "" {
				fmt.Println(dir.Name())
			}
			root_src = dir.Path()
			files, err := ioutil.ReadDir(root_src)
			if err != nil {
				log.Fatal(err)
			}
			tabs := container.NewAppTabs()
			for _, file := range files {
				fmt.Println(file.Name(), file.IsDir())
				if !file.IsDir() {
					extensions := strings.Split(file.Name(), ".")[1]
					if extensions == "png" || extensions == "jpeg" || extensions == "jpg" {
						image := canvas.NewImageFromFile(root_src + "\\" + file.Name())
						image.FillMode = canvas.ImageFillContain
						tabs.Append(container.NewTabItem(file.Name(), image))
					}
				}
			}
			tabs.SetTabLocation(container.TabLocationLeading)
			w.SetContent(container.NewBorder(nil, nil, nil, nil, tabs))
		}, w).Show()

	})

	r, _ := fyne.LoadResourceFromPath("media\\gallery1.png")
	w.SetIcon(r)
	w.SetContent(container.NewBorder(selectFolderButton, nil, nil, nil))
	w.CenterOnScreen()
	w.Show()
}