Catalog/imagecatalog/AvaloniaMainWindow.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Media.Imaging;
using Avalonia.Platform.Storage;
using Avalonia.Styling;
using Avalonia.Threading;
using System;
using System.IO;

namespace ImageCatalog_2;

public partial class AvaloniaMainWindow : Window
{
    private readonly DataModel _model;
    private bool _isDarkTheme = false;

    public AvaloniaMainWindow(DataModel model)
    {
        InitializeComponent();
        _model = model;
        DataContext = _model;

        // Provide Avalonia dispatcher so DataModel can marshal UI updates
        _model.UiInvoker = action => Dispatcher.UIThread.Invoke(action);

        // Wire dialog events
        _model.SelectSourceFolderRequested += async (_, _) =>
        {
            var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions { Title = "Seleziona cartella sorgente" });
            if (folders.Count > 0) _model.SourcePath = folders[0].Path.LocalPath + Path.DirectorySeparatorChar;
        };

        _model.SelectDestinationFolderRequested += async (_, _) =>
        {
            var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions { Title = "Seleziona cartella destinazione" });
            if (folders.Count > 0) _model.DestinationPath = folders[0].Path.LocalPath + Path.DirectorySeparatorChar;
        };

        _model.SelectLogoFileRequested += async (_, _) =>
        {
            var files = await StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
            {
                Title = "Seleziona logo",
                FileTypeFilter = new[] { new FilePickerFileType("Immagini") { Patterns = new[] { "*.jpg", "*.jpeg", "*.png", "*.bmp", "*.gif" } } }
            });
            if (files.Count > 0)
            {
                _model.LogoFile = files[0].Path.LocalPath;
                UpdateLogoPreview(_model.LogoFile);
            }
        };

        _model.SelectModelsFolderRequested += async (_, _) =>
        {
            var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions { Title = "Seleziona cartella modelli" });
            if (folders.Count > 0) _model.ModelsFolderPath = folders[0].Path.LocalPath + Path.DirectorySeparatorChar;
        };

        _model.SelectCsvOutputRequested += async (_, _) =>
        {
            var file = await StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
            {
                Title = "Salva CSV",
                DefaultExtension = "csv",
                FileTypeChoices = new[] { new FilePickerFileType("CSV") { Patterns = new[] { "*.csv" } } }
            });
            if (file != null) _model.CsvOutputPath = file.Path.LocalPath;
        };

        _model.SaveSettingsRequested += async (_, _) =>
        {
            var file = await StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
            {
                Title = "Salva impostazioni",
                DefaultExtension = "xml",
                FileTypeChoices = new[] { new FilePickerFileType("Setup") { Patterns = new[] { "*.xml" } } }
            });
            if (file != null) await _model.SaveSettingsToFileAsync(file.Path.LocalPath);
        };

        _model.LoadSettingsRequested += async (_, _) =>
        {
            var files = await StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
            {
                Title = "Carica impostazioni",
                FileTypeFilter = new[] { new FilePickerFileType("Setup") { Patterns = new[] { "*.xml" } } }
            });
            if (files.Count > 0) await _model.LoadSettingsFromFileAsync(files[0].Path.LocalPath);
        };

        _model.SelectColorRequested += (_, _) =>
        {
            // Color is set by typing hex directly in the TextBox
        };

        _model.SelectTransparentColorRequested += (_, _) =>
        {
            // Color is set by typing hex directly in the TextBox
        };

        _model.PropertyChanged += (_, e) =>
        {
            if (e.PropertyName == nameof(_model.LogoFile))
                UpdateLogoPreview(_model.LogoFile);
        };
    }

    private void ToggleTheme_Click(object? sender, RoutedEventArgs e)
    {
        _isDarkTheme = !_isDarkTheme;
        if (Avalonia.Application.Current != null)
            Avalonia.Application.Current.RequestedThemeVariant = _isDarkTheme ? ThemeVariant.Dark : ThemeVariant.Light;
    }

    private void OpenSourceFolder_Click(object? sender, RoutedEventArgs e) => OpenInExplorer(_model.SourcePath);
    private void OpenDestinationFolder_Click(object? sender, RoutedEventArgs e) => OpenInExplorer(_model.DestinationPath);
    private void OpenModelsFolder_Click(object? sender, RoutedEventArgs e) => OpenInExplorer(_model.ModelsFolderPath);
    private void OpenCsvOutputFolder_Click(object? sender, RoutedEventArgs e)
    {
        var dir = Path.GetDirectoryName(_model.CsvOutputPath);
        OpenInExplorer(string.IsNullOrWhiteSpace(dir) ? _model.CsvOutputPath : dir);
    }

    private static void OpenInExplorer(string? path)
    {
        if (string.IsNullOrWhiteSpace(path)) return;
        path = path.Trim().Trim('"');
        try
        {
            if (File.Exists(path))
                System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{path}\"");
            else if (Directory.Exists(path))
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo { FileName = path, UseShellExecute = true });
        }
        catch { }
    }

    private void UpdateLogoPreview(string? path)
    {
        var preview = this.FindControl<Avalonia.Controls.Image>("LogoPreview");
        if (preview == null) return;
        if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))
        {
            preview.Source = null;
            return;
        }
        try { preview.Source = new Avalonia.Media.Imaging.Bitmap(path); }
        catch { preview.Source = null; }
    }
}