Steven Kirk
8 years ago
committed by
GitHub
GitHub
13 changed files with 534 additions and 373 deletions
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using System.Collections.Generic; |
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using System.Reactive; |
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using System.Threading.Tasks; |
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using Avalonia.Controls; |
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using ReactiveUI; |
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|
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namespace ControlCatalog.ViewModels |
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{ |
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public class ContextMenuPageViewModel |
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{ |
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public ContextMenuPageViewModel() |
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{ |
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OpenCommand = ReactiveCommand.CreateFromTask(Open); |
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SaveCommand = ReactiveCommand.Create(Save); |
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OpenRecentCommand = ReactiveCommand.Create<string>(OpenRecent); |
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|
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MenuItems = new[] |
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{ |
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new MenuItemViewModel { Header = "_Open...", Command = OpenCommand }, |
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new MenuItemViewModel { Header = "Save", Command = SaveCommand }, |
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new MenuItemViewModel { Header = "-" }, |
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new MenuItemViewModel |
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{ |
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Header = "Recent", |
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Items = new[] |
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{ |
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new MenuItemViewModel |
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{ |
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Header = "File1.txt", |
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Command = OpenRecentCommand, |
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CommandParameter = @"c:\foo\File1.txt" |
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}, |
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new MenuItemViewModel |
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{ |
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Header = "File2.txt", |
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Command = OpenRecentCommand, |
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CommandParameter = @"c:\foo\File2.txt" |
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}, |
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} |
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}, |
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}; |
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} |
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public IReadOnlyList<MenuItemViewModel> MenuItems { get; set; } |
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public ReactiveCommand<Unit, Unit> OpenCommand { get; } |
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public ReactiveCommand<Unit, Unit> SaveCommand { get; } |
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public ReactiveCommand<string, Unit> OpenRecentCommand { get; } |
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public async Task Open() |
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{ |
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var dialog = new OpenFileDialog(); |
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var result = await dialog.ShowAsync(App.Current.MainWindow); |
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if (result != null) |
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{ |
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foreach (var path in result) |
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{ |
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System.Diagnostics.Debug.WriteLine($"Opened: {path}"); |
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} |
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} |
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} |
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|
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public void Save() |
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{ |
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System.Diagnostics.Debug.WriteLine("Save"); |
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} |
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public void OpenRecent(string path) |
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{ |
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System.Diagnostics.Debug.WriteLine($"Open recent: {path}"); |
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} |
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} |
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} |
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@ -0,0 +1,13 @@ |
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using System.Collections.Generic; |
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using System.Windows.Input; |
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|
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namespace ControlCatalog.ViewModels |
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{ |
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public class MenuItemViewModel |
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{ |
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public string Header { get; set; } |
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public ICommand Command { get; set; } |
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public object CommandParameter { get; set; } |
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public IList<MenuItemViewModel> Items { get; set; } |
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} |
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} |
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@ -0,0 +1,89 @@ |
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using System.Collections.Generic; |
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using System.Reactive; |
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using System.Threading.Tasks; |
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using Avalonia.Controls; |
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using ReactiveUI; |
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|
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namespace ControlCatalog.ViewModels |
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{ |
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public class MenuPageViewModel |
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{ |
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public MenuPageViewModel() |
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{ |
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OpenCommand = ReactiveCommand.CreateFromTask(Open); |
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SaveCommand = ReactiveCommand.Create(Save); |
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OpenRecentCommand = ReactiveCommand.Create<string>(OpenRecent); |
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|
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MenuItems = new[] |
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{ |
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new MenuItemViewModel |
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{ |
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Header = "_File", |
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Items = new[] |
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{ |
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new MenuItemViewModel { Header = "_Open...", Command = OpenCommand }, |
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new MenuItemViewModel { Header = "Save", Command = SaveCommand }, |
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new MenuItemViewModel { Header = "-" }, |
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new MenuItemViewModel |
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{ |
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Header = "Recent", |
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Items = new[] |
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{ |
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new MenuItemViewModel |
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{ |
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Header = "File1.txt", |
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Command = OpenRecentCommand, |
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CommandParameter = @"c:\foo\File1.txt" |
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}, |
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new MenuItemViewModel |
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{ |
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Header = "File2.txt", |
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Command = OpenRecentCommand, |
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CommandParameter = @"c:\foo\File2.txt" |
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}, |
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} |
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}, |
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} |
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}, |
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new MenuItemViewModel |
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{ |
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Header = "_Edit", |
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Items = new[] |
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{ |
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new MenuItemViewModel { Header = "_Copy" }, |
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new MenuItemViewModel { Header = "_Paste" }, |
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} |
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} |
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}; |
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} |
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|
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public IReadOnlyList<MenuItemViewModel> MenuItems { get; set; } |
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public ReactiveCommand<Unit, Unit> OpenCommand { get; } |
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public ReactiveCommand<Unit, Unit> SaveCommand { get; } |
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public ReactiveCommand<string, Unit> OpenRecentCommand { get; } |
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public async Task Open() |
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{ |
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var dialog = new OpenFileDialog(); |
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var result = await dialog.ShowAsync(App.Current.MainWindow); |
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if (result != null) |
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{ |
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foreach (var path in result) |
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{ |
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System.Diagnostics.Debug.WriteLine($"Opened: {path}"); |
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} |
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} |
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} |
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public void Save() |
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{ |
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System.Diagnostics.Debug.WriteLine("Save"); |
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} |
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public void OpenRecent(string path) |
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{ |
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System.Diagnostics.Debug.WriteLine($"Open recent: {path}"); |
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} |
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} |
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} |
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@ -0,0 +1,192 @@ |
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// Copyright (c) The Avalonia Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using Avalonia.Controls.Generators; |
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using Avalonia.Controls.Platform; |
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using Avalonia.Controls.Primitives; |
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using Avalonia.Controls.Templates; |
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using Avalonia.Input; |
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using Avalonia.Interactivity; |
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using Avalonia.LogicalTree; |
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namespace Avalonia.Controls |
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{ |
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/// <summary>
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/// Base class for menu controls.
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/// </summary>
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public abstract class MenuBase : SelectingItemsControl, IFocusScope, IMenu |
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{ |
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/// <summary>
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/// Defines the <see cref="IsOpen"/> property.
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/// </summary>
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public static readonly DirectProperty<Menu, bool> IsOpenProperty = |
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AvaloniaProperty.RegisterDirect<Menu, bool>( |
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nameof(IsOpen), |
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o => o.IsOpen); |
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/// <summary>
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/// Defines the <see cref="MenuOpened"/> event.
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/// </summary>
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public static readonly RoutedEvent<RoutedEventArgs> MenuOpenedEvent = |
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RoutedEvent.Register<MenuItem, RoutedEventArgs>(nameof(MenuOpened), RoutingStrategies.Bubble); |
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/// <summary>
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/// Defines the <see cref="MenuClosed"/> event.
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/// </summary>
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public static readonly RoutedEvent<RoutedEventArgs> MenuClosedEvent = |
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RoutedEvent.Register<MenuItem, RoutedEventArgs>(nameof(MenuClosed), RoutingStrategies.Bubble); |
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private bool _isOpen; |
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/// <summary>
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/// Initializes a new instance of the <see cref="MenuBase"/> class.
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/// </summary>
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public MenuBase() |
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{ |
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InteractionHandler = new DefaultMenuInteractionHandler(false); |
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} |
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/// <summary>
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/// Initializes a new instance of the <see cref="MenuBase"/> class.
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/// </summary>
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/// <param name="interactionHandler">The menu interaction handler.</param>
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public MenuBase(IMenuInteractionHandler interactionHandler) |
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{ |
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Contract.Requires<ArgumentNullException>(interactionHandler != null); |
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InteractionHandler = interactionHandler; |
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} |
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/// <summary>
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/// Initializes static members of the <see cref="MenuBase"/> class.
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/// </summary>
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static MenuBase() |
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{ |
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MenuItem.SubmenuOpenedEvent.AddClassHandler<MenuBase>(x => x.OnSubmenuOpened); |
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} |
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/// <summary>
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/// Gets a value indicating whether the menu is open.
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/// </summary>
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public bool IsOpen |
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{ |
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get { return _isOpen; } |
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protected set { SetAndRaise(IsOpenProperty, ref _isOpen, value); } |
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} |
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/// <inheritdoc/>
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IMenuInteractionHandler IMenu.InteractionHandler => InteractionHandler; |
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/// <inheritdoc/>
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IMenuItem IMenuElement.SelectedItem |
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{ |
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get |
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{ |
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var index = SelectedIndex; |
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return (index != -1) ? |
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(IMenuItem)ItemContainerGenerator.ContainerFromIndex(index) : |
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null; |
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} |
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set |
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{ |
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SelectedIndex = ItemContainerGenerator.IndexFromContainer(value); |
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} |
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} |
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/// <inheritdoc/>
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IEnumerable<IMenuItem> IMenuElement.SubItems |
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{ |
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get |
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{ |
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return ItemContainerGenerator.Containers |
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.Select(x => x.ContainerControl) |
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.OfType<IMenuItem>(); |
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} |
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} |
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/// <summary>
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/// Gets the interaction handler for the menu.
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/// </summary>
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protected IMenuInteractionHandler InteractionHandler { get; } |
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/// <summary>
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/// Occurs when a <see cref="Menu"/> is opened.
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/// </summary>
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public event EventHandler<RoutedEventArgs> MenuOpened |
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{ |
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add { AddHandler(MenuOpenedEvent, value); } |
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remove { RemoveHandler(MenuOpenedEvent, value); } |
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} |
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/// <summary>
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/// Occurs when a <see cref="Menu"/> is closed.
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/// </summary>
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public event EventHandler<RoutedEventArgs> MenuClosed |
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{ |
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add { AddHandler(MenuClosedEvent, value); } |
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remove { RemoveHandler(MenuClosedEvent, value); } |
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} |
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/// <summary>
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/// Closes the menu.
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/// </summary>
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public abstract void Close(); |
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/// <summary>
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/// Opens the menu.
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/// </summary>
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public abstract void Open(); |
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/// <inheritdoc/>
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bool IMenuElement.MoveSelection(NavigationDirection direction, bool wrap) => MoveSelection(direction, wrap); |
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/// <inheritdoc/>
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protected override IItemContainerGenerator CreateItemContainerGenerator() |
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{ |
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return new ItemContainerGenerator<MenuItem>(this, MenuItem.HeaderProperty, null); |
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} |
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/// <inheritdoc/>
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protected override void OnKeyDown(KeyEventArgs e) |
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{ |
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// Don't handle here: let the interaction handler handle it.
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} |
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/// <inheritdoc/>
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protected override void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e) |
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{ |
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base.OnAttachedToVisualTree(e); |
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InteractionHandler.Attach(this); |
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} |
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/// <inheritdoc/>
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protected override void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e) |
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{ |
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base.OnDetachedFromVisualTree(e); |
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InteractionHandler.Detach(this); |
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} |
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|
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/// <summary>
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/// Called when a submenu opens somewhere in the menu.
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/// </summary>
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/// <param name="e">The event args.</param>
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protected virtual void OnSubmenuOpened(RoutedEventArgs e) |
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{ |
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if (e.Source is MenuItem menuItem && menuItem.Parent == this) |
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{ |
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foreach (var child in this.GetLogicalChildren().OfType<MenuItem>()) |
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{ |
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if (child != menuItem && child.IsSubMenuOpen) |
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{ |
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child.IsSubMenuOpen = false; |
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} |
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} |
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} |
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IsOpen = true; |
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} |
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} |
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} |
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