Feat: add a new control PathPicker, add PathPickerDemo
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望尘空忧
211
src/Ursa/Controls/PathPicker/PathPicker.cs
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211
src/Ursa/Controls/PathPicker/PathPicker.cs
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using System.Windows.Input;
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using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Controls.Metadata;
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using Avalonia.Controls.Primitives;
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using Avalonia.Data;
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using Avalonia.Input;
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using Avalonia.Interactivity;
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using Avalonia.Platform.Storage;
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using Avalonia.Threading;
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using Irihi.Avalonia.Shared.Common;
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namespace Ursa.Controls;
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[TemplatePart(Name = "PART_Button", Type = typeof(Button))]
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public class PathPicker : TemplatedControl
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{
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public static readonly StyledProperty<string?> SelectedPathProperty =
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AvaloniaProperty.Register<PathPicker, string?>(
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nameof(SelectedPath), defaultBindingMode: BindingMode.TwoWay, enableDataValidation: true,
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validate: x => string.IsNullOrWhiteSpace(x) || File.Exists(x) || Directory.Exists(x));
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public static readonly StyledProperty<string> SuggestedStartPathProperty =
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AvaloniaProperty.Register<PathPicker, string>(
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nameof(SuggestedStartPath), string.Empty);
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public static readonly StyledProperty<UsePickerTypes> UsePickerTypeProperty =
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AvaloniaProperty.Register<PathPicker, UsePickerTypes>(
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nameof(UsePickerType));
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public static readonly StyledProperty<string> SuggestedFileNameProperty =
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AvaloniaProperty.Register<PathPicker, string>(
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nameof(SuggestedFileName), string.Empty);
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public static readonly StyledProperty<string> FileFilterProperty = AvaloniaProperty.Register<PathPicker, string>(
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nameof(FileFilter), string.Empty);
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public static readonly StyledProperty<string> TitleProperty = AvaloniaProperty.Register<PathPicker, string>(
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nameof(Title), string.Empty);
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public static readonly StyledProperty<string> DefaultFileExtensionProperty =
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AvaloniaProperty.Register<PathPicker, string>(
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nameof(DefaultFileExtension), string.Empty);
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public static readonly DirectProperty<PathPicker, IReadOnlyList<string>> SelectedPathsProperty =
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AvaloniaProperty.RegisterDirect<PathPicker, IReadOnlyList<string>>(
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nameof(SelectedPaths), o => o.SelectedPaths, (o, v) => o.SelectedPaths = v);
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public static readonly StyledProperty<ICommand?> CommandProperty = AvaloniaProperty.Register<PathPicker, ICommand?>(
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nameof(Command));
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public static readonly StyledProperty<bool> AllowMultipleProperty = AvaloniaProperty.Register<PathPicker, bool>(
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nameof(AllowMultiple));
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private Button? _button;
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private IReadOnlyList<string> _selectedPaths = [];
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public PathPicker()
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{
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KeyBindings.Add(new KeyBinding
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{
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Command = new IRIHI_CommandBase(() =>
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{
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if (!SelectedPathProperty.ValidateValue!.Invoke(SelectedPath)) return;
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SelectedPaths = string.IsNullOrWhiteSpace(SelectedPath) ? Array.Empty<string>() : [SelectedPath!];
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Command?.Execute(Task.FromResult(SelectedPaths));
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}),
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Gesture = new KeyGesture(Key.Enter)
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});
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}
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public bool AllowMultiple
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{
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get => GetValue(AllowMultipleProperty);
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set => SetValue(AllowMultipleProperty, value);
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}
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public ICommand? Command
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{
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get => GetValue(CommandProperty);
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set => SetValue(CommandProperty, value);
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}
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public IReadOnlyList<string> SelectedPaths
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{
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get => _selectedPaths;
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private set => SetAndRaise(SelectedPathsProperty, ref _selectedPaths, value);
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}
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public string SuggestedFileName
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{
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get => GetValue(SuggestedFileNameProperty);
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set => SetValue(SuggestedFileNameProperty, value);
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}
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public string DefaultFileExtension
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{
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get => GetValue(DefaultFileExtensionProperty);
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set => SetValue(DefaultFileExtensionProperty, value);
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}
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public string Title
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{
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get => GetValue(TitleProperty);
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set => SetValue(TitleProperty, value);
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}
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public string FileFilter
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{
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get => GetValue(FileFilterProperty);
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set => SetValue(FileFilterProperty, value);
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}
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public UsePickerTypes UsePickerType
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{
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get => GetValue(UsePickerTypeProperty);
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set => SetValue(UsePickerTypeProperty, value);
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}
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public string SuggestedStartPath
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{
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get => GetValue(SuggestedStartPathProperty);
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set => SetValue(SuggestedStartPathProperty, value);
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}
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public string? SelectedPath
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{
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get => GetValue(SelectedPathProperty);
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set => SetValue(SelectedPathProperty, value);
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}
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protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
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{
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base.OnPropertyChanged(change);
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if (change.Property == SelectedPathsProperty)
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SelectedPath = SelectedPaths.Count > 0 ? SelectedPaths[0] : string.Empty;
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}
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protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
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{
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base.OnApplyTemplate(e);
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_button = e.NameScope.Find<Button>("PART_Button");
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_button!.Click += LaunchPicker;
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}
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private void LaunchPicker(object? sender, RoutedEventArgs e)
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{
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if (TopLevel.GetTopLevel(this)?.StorageProvider is not { } storageProvider) return;
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Task<IReadOnlyList<string>> task = Task.Run(async () =>
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{
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await Dispatcher.UIThread.InvokeAsync(async () =>
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{
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switch (UsePickerType)
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{
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case UsePickerTypes.OpenFile:
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FilePickerOpenOptions filePickerOpenOptions = new()
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{
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Title = Title,
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AllowMultiple = AllowMultiple,
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SuggestedStartLocation =
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await storageProvider.TryGetFolderFromPathAsync(SuggestedStartPath),
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FileTypeFilter = FileFilter?.Split(',')
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.Select(x => new FilePickerFileType(x) { Patterns = [x] }).ToList()
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};
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var resFiles = await storageProvider.OpenFilePickerAsync(filePickerOpenOptions);
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SelectedPaths = resFiles.Select(x => x.TryGetLocalPath()).ToArray()!;
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break;
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case UsePickerTypes.SaveFile:
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FilePickerSaveOptions filePickerSaveOptions = new()
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{
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Title = Title,
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SuggestedStartLocation =
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await storageProvider.TryGetFolderFromPathAsync(SuggestedStartPath),
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SuggestedFileName = SuggestedFileName,
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FileTypeChoices = FileFilter?.Split(',')
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.Select(x => new FilePickerFileType(x) { Patterns = [x] }).ToList(),
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DefaultExtension = DefaultFileExtension
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};
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var path = (await storageProvider.SaveFilePickerAsync(filePickerSaveOptions))
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?.TryGetLocalPath();
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SelectedPaths = string.IsNullOrEmpty(path)
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? Array.Empty<string>()
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: [path!];
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break;
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case UsePickerTypes.OpenFolder:
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FolderPickerOpenOptions folderPickerOpenOptions = new()
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{
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Title = Title,
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AllowMultiple = AllowMultiple,
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SuggestedStartLocation =
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await storageProvider.TryGetFolderFromPathAsync(SuggestedStartPath),
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SuggestedFileName = SuggestedFileName
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};
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var resFolder = await storageProvider.OpenFolderPickerAsync(folderPickerOpenOptions);
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SelectedPaths = resFolder.Select(x => x.TryGetLocalPath()).ToArray()!;
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break;
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default:
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throw new ArgumentOutOfRangeException();
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}
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});
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return await Dispatcher.UIThread.InvokeAsync(() => SelectedPaths);
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});
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_button!.CommandParameter = task;
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}
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}
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8
src/Ursa/Controls/PathPicker/UsePickerTypes.cs
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8
src/Ursa/Controls/PathPicker/UsePickerTypes.cs
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@@ -0,0 +1,8 @@
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namespace Ursa.Controls;
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public enum UsePickerTypes
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{
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OpenFile,
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SaveFile,
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OpenFolder
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}
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