Files Upload

Allows a user to upload images and files.

Single File

Show Code

package main

import (
  "fmt"
  "image"
  "path/filepath"

  _ "image/gif"
  _ "image/jpeg"
  _ "image/png"

  "fyne.io/fyne/v2"
  "fyne.io/fyne/v2/app"
  "fyne.io/fyne/v2/canvas"
  "fyne.io/fyne/v2/container"
  "fyne.io/fyne/v2/dialog"
  "fyne.io/fyne/v2/storage"
  "fyne.io/fyne/v2/widget"
)

func main() {
  myApp := app.NewWithID("com.example.fileupload")
  myWindow := myApp.NewWindow("File/Image Upload")

  // Label to show file info or errors
  infoLabel := widget.NewLabel("No file selected")

  // Placeholder for displaying images
  imageDisplay := canvas.NewImageFromResource(nil)
  imageDisplay.FillMode = canvas.ImageFillContain
  imageDisplay.SetMinSize(fyne.NewSize(200, 200))

  // Button to open file dialog
  uploadButton := widget.NewButton("Upload File", func() {
    fd := dialog.NewFileOpen(func(reader fyne.URIReadCloser, err error) {
      if err != nil {
        // Handle unexpected dialog errors
        dialog.ShowError(fmt.Errorf("failed to open file: %w", err), myWindow)
        return
      }
      if reader == nil {
        // User cancelled selection
        infoLabel.SetText("No file selected")
        return
      }
      defer reader.Close()

      // Check file extension
      ext := filepath.Ext(reader.URI().Name())
      if ext != ".png" && ext != ".jpg" && ext != ".jpeg" && ext != ".gif" {
        infoLabel.SetText("Unsupported file type: " + ext)
        return
      }

      // Decode image to verify it's valid
      img, _, imgErr := image.Decode(reader)
      if imgErr != nil {
        infoLabel.SetText("Error decoding image: " + imgErr.Error())
        return
      }

      // If valid, show image and file details
      imageDisplay.Image = img
      imageDisplay.Refresh()

      fileInfo := fmt.Sprintf("File: %s\nSize: %dx%d px", reader.URI().Name(), img.Bounds().Dx(), img.Bounds().Dy())
      infoLabel.SetText(fileInfo)
    }, myWindow)

    // Set filter to only images
    fd.SetFilter(storage.NewExtensionFileFilter([]string{".png", ".jpg", ".jpeg", ".gif"}))
    fd.Show()
  })

  // Layout
  content := container.NewVBox(
    uploadButton,
    infoLabel,
    imageDisplay,
  )

  myWindow.SetContent(content)
  myWindow.Resize(fyne.NewSize(400, 400))
  myWindow.ShowAndRun()
}