public static CheckablePatternDataViewModel ToCheckable(this PatternDataViewModel source, ItemState state)
 {
     return(new CheckablePatternDataViewModel(source, state));
 }
 public CheckablePatternDataViewModel(PatternDataViewModel viewModel)
     : base(viewModel.Name, viewModel.PatternType, viewModel.Data)
 {
     Id = viewModel.Id;
 }
 public CheckablePatternDataViewModel(PatternDataViewModel viewModel, ItemState state)
     : this(viewModel)
 {
     State = state;
 }
        private void AddPatterns()
        {
            OpenFileDialog fileDialog = new OpenFileDialog()
            {
                CheckFileExists = true,
                CheckPathExists = true,
                Multiselect     = true,
                Filter          = "JPEG Files (*.jpeg)|*.jpeg|PNG Files (*.png)|*.png|JPG Files (*.jpg)|*.jpg"
            };

            Func <string, bool> isValidFile = file =>
            {
                string[] extensions =
                {
                    ".png",
                    ".jpeg",
                    ".jpg"
                };

                string ext = Path.GetExtension(file);
                return(extensions.Contains(ext));
            };

            fileDialog.FileOk += (sender, args) =>
            {
                if (!fileDialog.FileNames.All(isValidFile))
                {
                    args.Cancel = true;
                }
            };

            bool?dialogResult = fileDialog.ShowDialog();

            if (dialogResult.HasValue && dialogResult.Value)
            {
                try
                {
                    Stream[] files = fileDialog.OpenFiles();
                    for (int i = 0; i < fileDialog.FileNames.Length; i++)
                    {
                        string filePath = fileDialog.FileNames[i];
                        Stream file     = files[i];
                        byte[] fileData = null;

                        using (var stream = new MemoryStream())
                        {
                            file.CopyTo(stream);
                            fileData = stream.ToArray();
                        }

                        CheckablePatternDataViewModel viewModel = new PatternDataViewModel(Path.GetFileName(filePath), Pattern.PatternType, fileData)
                                                                  .ToCheckable(ItemState.Added);

                        Children.Add(viewModel);
                    }
                }
                catch (Exception ex)
                {
                }


                CheckItem();
            }
        }