Dialog File

Dialog File

Wails menyediakan dialog file native dengan tampilan sesuai platform untuk membuka file, menyimpan file, dan memilih folder. API sederhana dengan filter tipe file, dukungan pemilihan ganda, dan lokasi default.

Membuat Dialog File

Dialog file diakses melalui manager app.Dialog:

app.Dialog.OpenFile()
app.Dialog.SaveFile()

Dialog Buka File

Pilih file untuk dibuka:

path, err := app.Dialog.OpenFile().
    SetTitle("Select Image").
    AddFilter("Images", "*.png;*.jpg;*.gif").
    AddFilter("All Files", "*.*").
    PromptForSingleSelection()

if err != nil || path == "" {
    return
}

openFile(path)

Kasus penggunaan:

• Buka dokumen
• Impor file
• Muat gambar
• Pilih file konfigurasi

Pemilihan File Tunggal

path, err := app.Dialog.OpenFile().
    SetTitle("Open Document").
    AddFilter("Text Files", "*.txt").
    AddFilter("All Files", "*.*").
    PromptForSingleSelection()

if err != nil || path == "" {
    // User cancelled or error occurred
    return
}

// Use selected file
data, _ := os.ReadFile(path)

Pemilihan Beberapa File

paths, err := app.Dialog.OpenFile().
    SetTitle("Select Images").
    AddFilter("Images", "*.png;*.jpg;*.jpeg;*.gif").
    PromptForMultipleSelection()

if err != nil {
    return
}

// Process all selected files
for _, path := range paths {
    processFile(path)
}

Dengan Direktori Default

path, err := app.Dialog.OpenFile().
    SetTitle("Open File").
    SetDirectory("/Users/me/Documents").
    PromptForSingleSelection()

Dialog Simpan File

Pilih lokasi penyimpanan:

path, err := app.Dialog.SaveFile().
    SetFilename("document.txt").
    AddFilter("Text Files", "*.txt").
    AddFilter("All Files", "*.*").
    PromptForSingleSelection()

if err != nil || path == "" {
    return
}

saveFile(path, data)

Kasus penggunaan:

• Simpan dokumen
• Ekspor data
• Buat file baru
• Simpan sebagai…

Dengan Nama File Default

path, err := app.Dialog.SaveFile().
    SetFilename("export.csv").
    AddFilter("CSV Files", "*.csv").
    PromptForSingleSelection()

Dengan Direktori Default

path, err := app.Dialog.SaveFile().
    SetDirectory("/Users/me/Documents").
    SetFilename("untitled.txt").
    PromptForSingleSelection()

Konfirmasi Timpa

path, err := app.Dialog.SaveFile().
    SetFilename("document.txt").
    PromptForSingleSelection()

if err != nil || path == "" {
    return
}

// Check if file exists
if _, err := os.Stat(path); err == nil {
    dialog := app.Dialog.Question().
        SetTitle("Confirm Overwrite").
        SetMessage("File already exists. Overwrite?")

    overwriteBtn := dialog.AddButton("Overwrite")
    overwriteBtn.OnClick(func() {
        saveFile(path, data)
    })

    cancelBtn := dialog.AddButton("Cancel")
    dialog.SetDefaultButton(cancelBtn)
    dialog.SetCancelButton(cancelBtn)
    dialog.Show()
    return
}

saveFile(path, data)

Dialog Pilih Folder

Pilih direktori menggunakan dialog buka file dengan pemilihan direktori diaktifkan:

path, err := app.Dialog.OpenFile().
    SetTitle("Select Output Folder").
    CanChooseDirectories(true).
    CanChooseFiles(false).
    PromptForSingleSelection()

if err != nil || path == "" {
    return
}

exportToFolder(path)

Kasus penggunaan:

• Pilih direktori output
• Pilih workspace
• Pilih lokasi backup
• Pilih direktori instalasi

Dengan Direktori Default

path, err := app.Dialog.OpenFile().
    SetTitle("Select Folder").
    SetDirectory("/Users/me/Documents").
    CanChooseDirectories(true).
    CanChooseFiles(false).
    PromptForSingleSelection()

Filter File

Gunakan metode AddFilter() untuk menambahkan filter tipe file ke dialog. Setiap panggilan menambahkan opsi filter baru.

Filter Dasar

path, _ := app.Dialog.OpenFile().
    AddFilter("Text Files", "*.txt").
    AddFilter("All Files", "*.*").
    PromptForSingleSelection()

Beberapa Ekstensi

Gunakan titik koma untuk menentukan beberapa ekstensi dalam satu filter:

dialog := app.Dialog.OpenFile().
    AddFilter("Images", "*.png;*.jpg;*.jpeg;*.gif;*.bmp").
    AddFilter("Documents", "*.txt;*.doc;*.docx;*.pdf").
    AddFilter("All Files", "*.*")

Format Pola

Gunakan titik koma untuk memisahkan beberapa ekstensi dalam satu filter:

// Multiple extensions separated by semicolons
AddFilter("Images", "*.png;*.jpg;*.gif")

Contoh Lengkap

Buka File Gambar

func openImage(app *application.App) (image.Image, error) {
    path, err := app.Dialog.OpenFile().
        SetTitle("Select Image").
        AddFilter("Images", "*.png;*.jpg;*.jpeg;*.gif;*.bmp").
        PromptForSingleSelection()

    if err != nil {
        return nil, err
    }

    if path == "" {
        return nil, errors.New("no file selected")
    }

    // Open and decode image
    file, err := os.Open(path)
    if err != nil {
        app.Dialog.Error().
            SetTitle("Open Failed").
            SetMessage(err.Error()).
            Show()
        return nil, err
    }
    defer file.Close()

    img, _, err := image.Decode(file)
    if err != nil {
        app.Dialog.Error().
            SetTitle("Invalid Image").
            SetMessage("Could not decode image file.").
            Show()
        return nil, err
    }

    return img, nil
}

Simpan Dokumen dengan Validasi

func saveDocument(app *application.App, content string) {
    path, err := app.Dialog.SaveFile().
        SetFilename("document.txt").
        AddFilter("Text Files", "*.txt").
        AddFilter("Markdown Files", "*.md").
        AddFilter("All Files", "*.*").
        PromptForSingleSelection()

    if err != nil || path == "" {
        return
    }

    // Validate extension
    ext := filepath.Ext(path)
    if ext != ".txt" && ext != ".md" {
        dialog := app.Dialog.Question().
            SetTitle("Confirm Extension").
            SetMessage(fmt.Sprintf("Save as %s file?", ext))

        saveBtn := dialog.AddButton("Save")
        saveBtn.OnClick(func() {
            doSave(app, path, content)
        })

        cancelBtn := dialog.AddButton("Cancel")
        dialog.SetDefaultButton(cancelBtn)
        dialog.SetCancelButton(cancelBtn)
        dialog.Show()
        return
    }

    doSave(app, path, content)
}

func doSave(app *application.App, path, content string) {
    if err := os.WriteFile(path, []byte(content), 0644); err != nil {
        app.Dialog.Error().
            SetTitle("Save Failed").
            SetMessage(err.Error()).
            Show()
        return
    }

    app.Dialog.Info().
        SetTitle("Saved").
        SetMessage("Document saved successfully!").
        Show()
}

Pemrosesan File Batch

func processMultipleFiles(app *application.App) {
    paths, err := app.Dialog.OpenFile().
        SetTitle("Select Files to Process").
        AddFilter("Images", "*.png;*.jpg").
        PromptForMultipleSelection()

    if err != nil || len(paths) == 0 {
        return
    }

    // Confirm processing
    dialog := app.Dialog.Question().
        SetTitle("Confirm Processing").
        SetMessage(fmt.Sprintf("Process %d file(s)?", len(paths)))

    processBtn := dialog.AddButton("Process")
    processBtn.OnClick(func() {
        // Process files
        var errs []error
        for i, path := range paths {
            if err := processFile(path); err != nil {
                errs = append(errs, err)
            }

            // Update progress
            // app.Event.Emit("progress", map[string]interface{}{
            //     "current": i + 1,
            //     "total":   len(paths),
            // })
            _ = i // suppress unused variable warning in example
        }

        // Show results
        if len(errs) > 0 {
            app.Dialog.Warning().
                SetTitle("Processing Complete").
                SetMessage(fmt.Sprintf("Processed %d files with %d errors.",
                    len(paths), len(errs))).
                Show()
        } else {
            app.Dialog.Info().
                SetTitle("Success").
                SetMessage(fmt.Sprintf("Processed %d files successfully!", len(paths))).
                Show()
        }
    })

    cancelBtn := dialog.AddButton("Cancel")
    dialog.SetCancelButton(cancelBtn)
    dialog.Show()
}

Ekspor dengan Pemilihan Folder

func exportData(app *application.App, data []byte) {
    // Select output folder
    folder, err := app.Dialog.OpenFile().
        SetTitle("Select Export Folder").
        SetDirectory(getDefaultExportFolder()).
        CanChooseDirectories(true).
        CanChooseFiles(false).
        PromptForSingleSelection()

    if err != nil || folder == "" {
        return
    }

    // Generate filename
    filename := fmt.Sprintf("export_%s.csv",
        time.Now().Format("2006-01-02_15-04-05"))
    path := filepath.Join(folder, filename)

    // Save file
    if err := os.WriteFile(path, data, 0644); err != nil {
        app.Dialog.Error().
            SetTitle("Export Failed").
            SetMessage(err.Error()).
            Show()
        return
    }

    // Show success with option to open folder
    dialog := app.Dialog.Question().
        SetTitle("Export Complete").
        SetMessage(fmt.Sprintf("Exported to %s", filename))

    openBtn := dialog.AddButton("Open Folder")
    openBtn.OnClick(func() {
        openFolder(folder)
    })

    dialog.AddButton("OK")
    dialog.Show()
}

Impor dengan Validasi

func importConfiguration(app *application.App) {
    path, err := app.Dialog.OpenFile().
        SetTitle("Import Configuration").
        AddFilter("JSON Files", "*.json").
        AddFilter("YAML Files", "*.yaml;*.yml").
        PromptForSingleSelection()

    if err != nil || path == "" {
        return
    }

    // Read file
    data, err := os.ReadFile(path)
    if err != nil {
        app.Dialog.Error().
            SetTitle("Read Failed").
            SetMessage(err.Error()).
            Show()
        return
    }

    // Validate configuration
    config, err := parseConfig(data)
    if err != nil {
        app.Dialog.Error().
            SetTitle("Invalid Configuration").
            SetMessage("File is not a valid configuration.").
            Show()
        return
    }

    // Confirm import
    dialog := app.Dialog.Question().
        SetTitle("Confirm Import").
        SetMessage("Import this configuration?")

    importBtn := dialog.AddButton("Import")
    importBtn.OnClick(func() {
        // Apply configuration
        if err := applyConfig(config); err != nil {
            app.Dialog.Error().
                SetTitle("Import Failed").
                SetMessage(err.Error()).
                Show()
            return
        }

        app.Dialog.Info().
            SetTitle("Success").
            SetMessage("Configuration imported successfully!").
            Show()
    })

    cancelBtn := dialog.AddButton("Cancel")
    dialog.SetCancelButton(cancelBtn)
    dialog.Show()
}

Praktik Terbaik

✅ Lakukan

• Sediakan filter file - Bantu pengguna menemukan file
• Atur judul yang sesuai - Konteks yang jelas
• Gunakan direktori default - Mulai di lokasi yang logis
• Validasi pilihan - Periksa tipe file
• Tangani pembatalan - Pengguna mungkin membatalkan
• Tampilkan konfirmasi - Untuk aksi destruktif
• Berikan umpan balik - Pesan sukses/error

❌ Jangan

• Jangan lewati validasi - Periksa tipe file
• Jangan abaikan error - Tangani pembatalan
• Jangan gunakan filter generik - Spesifik
• Jangan lupa “All Files” - Selalu sertakan sebagai opsi
• Jangan hardcode path - Gunakan home directory pengguna
• Jangan asumsikan file ada - Periksa sebelum membuka

Perbedaan Platform

macOS

• NSOpenPanel/NSSavePanel native
• Gaya sheet saat dilampirkan ke window
• Mengikuti tema sistem
• Mendukung preview Quick Look
• Integrasi tag dan favorit

Windows

• Dialog File Open/Save native
• Mengikuti tema sistem
• Integrasi file recent
• Dukungan lokasi jaringan

Linux

• GTK file chooser
• Bervariasi menurut desktop environment
• Mengikuti tema desktop
• Dukungan file recent

Langkah Selanjutnya

Dialog Pesan

Dialog info, peringatan, dan error.

Pelajari Selengkapnya →

Dialog Kustom

Buat window dialog kustom.

Pelajari Selengkapnya →

Binding

Panggil fungsi Go dari JavaScript.

Pelajari Selengkapnya →

Event

Gunakan event untuk pembaruan progress.

Pelajari Selengkapnya →

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Pertanyaan? Tanyakan di Discord atau lihat contoh dialog file.