Steven Kirk
8 years ago
committed by
GitHub
GitHub
39 changed files with 1970 additions and 10 deletions
@ -0,0 +1,71 @@ |
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using Avalonia.Controls; |
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using Avalonia.Input.DragDrop; |
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using Avalonia.Markup.Xaml; |
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using System; |
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using System.Collections.Generic; |
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using System.Text; |
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|
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namespace ControlCatalog.Pages |
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{ |
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public class DragAndDropPage : UserControl |
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{ |
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private TextBlock _DropState; |
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private TextBlock _DragState; |
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private Border _DragMe; |
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private int DragCount = 0; |
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|
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public DragAndDropPage() |
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{ |
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this.InitializeComponent(); |
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_DragMe.PointerPressed += DoDrag; |
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AddHandler(DragDrop.DropEvent, Drop); |
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AddHandler(DragDrop.DragOverEvent, DragOver); |
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} |
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private async void DoDrag(object sender, Avalonia.Input.PointerPressedEventArgs e) |
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{ |
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DataObject dragData = new DataObject(); |
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dragData.Set(DataFormats.Text, $"You have dragged text {++DragCount} times"); |
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|
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var result = await DragDrop.DoDragDrop(dragData, DragDropEffects.Copy); |
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switch(result) |
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{ |
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case DragDropEffects.Copy: |
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_DragState.Text = "The text was copied"; break; |
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case DragDropEffects.Link: |
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_DragState.Text = "The text was linked"; break; |
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case DragDropEffects.None: |
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_DragState.Text = "The drag operation was canceled"; break; |
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} |
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} |
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|
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private void DragOver(object sender, DragEventArgs e) |
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{ |
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// Only allow Copy or Link as Drop Operations.
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e.DragEffects = e.DragEffects & (DragDropEffects.Copy | DragDropEffects.Link); |
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// Only allow if the dragged data contains text or filenames.
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if (!e.Data.Contains(DataFormats.Text) && !e.Data.Contains(DataFormats.FileNames)) |
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e.DragEffects = DragDropEffects.None; |
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} |
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|
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private void Drop(object sender, DragEventArgs e) |
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{ |
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if (e.Data.Contains(DataFormats.Text)) |
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_DropState.Text = e.Data.GetText(); |
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else if (e.Data.Contains(DataFormats.FileNames)) |
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_DropState.Text = string.Join(Environment.NewLine, e.Data.GetFileNames()); |
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} |
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|
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private void InitializeComponent() |
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{ |
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AvaloniaXamlLoader.Load(this); |
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_DropState = this.Find<TextBlock>("DropState"); |
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_DragState = this.Find<TextBlock>("DragState"); |
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_DragMe = this.Find<Border>("DragMe"); |
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} |
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} |
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} |
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@ -0,0 +1,19 @@ |
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<UserControl xmlns="https://github.com/avaloniaui"> |
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<StackPanel Orientation="Vertical" Gap="4"> |
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<TextBlock Classes="h1">Drag+Drop</TextBlock> |
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<TextBlock Classes="h2">Example of Drag+Drop capabilities</TextBlock> |
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|
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<StackPanel Orientation="Horizontal" |
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Margin="0,16,0,0" |
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HorizontalAlignment="Center" |
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Gap="16"> |
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<Border BorderBrush="{DynamicResource ThemeAccentBrush}" BorderThickness="2" Padding="16" Name="DragMe"> |
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<TextBlock Name="DragState">Drag Me</TextBlock> |
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</Border> |
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<Border Background="{DynamicResource ThemeAccentBrush2}" Padding="16" |
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DragDrop.AllowDrop="True"> |
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<TextBlock Name="DropState">Drop some text or files here</TextBlock> |
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</Border> |
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</StackPanel> |
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</StackPanel> |
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</UserControl> |
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@ -0,0 +1,212 @@ |
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using System; |
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using System.Linq; |
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using System.Reactive.Linq; |
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using System.Reactive.Subjects; |
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using System.Threading.Tasks; |
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using Avalonia.Controls; |
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using Avalonia.Input; |
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using Avalonia.Input.DragDrop; |
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using Avalonia.Input.DragDrop.Raw; |
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using Avalonia.Input.Platform; |
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using Avalonia.Input.Raw; |
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using Avalonia.Threading; |
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using Avalonia.VisualTree; |
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|
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namespace Avalonia.Platform |
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{ |
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class InProcessDragSource : IPlatformDragSource |
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{ |
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private const InputModifiers MOUSE_INPUTMODIFIERS = InputModifiers.LeftMouseButton|InputModifiers.MiddleMouseButton|InputModifiers.RightMouseButton; |
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private readonly IDragDropDevice _dragDrop; |
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private readonly IInputManager _inputManager; |
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private readonly Subject<DragDropEffects> _result = new Subject<DragDropEffects>(); |
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private DragDropEffects _allowedEffects; |
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private IDataObject _draggedData; |
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private IInputElement _lastRoot; |
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private Point _lastPosition; |
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private StandardCursorType _lastCursorType; |
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private object _originalCursor; |
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private InputModifiers? _initialInputModifiers; |
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public InProcessDragSource() |
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{ |
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_inputManager = AvaloniaLocator.Current.GetService<IInputManager>(); |
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_dragDrop = AvaloniaLocator.Current.GetService<IDragDropDevice>(); |
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} |
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public async Task<DragDropEffects> DoDragDrop(IDataObject data, DragDropEffects allowedEffects) |
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{ |
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Dispatcher.UIThread.VerifyAccess(); |
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if (_draggedData == null) |
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{ |
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_draggedData = data; |
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_lastRoot = null; |
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_lastPosition = default(Point); |
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_allowedEffects = allowedEffects; |
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|
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using (_inputManager.PreProcess.OfType<RawMouseEventArgs>().Subscribe(ProcessMouseEvents)) |
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{ |
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using (_inputManager.PreProcess.OfType<RawKeyEventArgs>().Subscribe(ProcessKeyEvents)) |
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{ |
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var effect = await _result.FirstAsync(); |
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return effect; |
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} |
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} |
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} |
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return DragDropEffects.None; |
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} |
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private DragDropEffects RaiseEventAndUpdateCursor(RawDragEventType type, IInputElement root, Point pt, InputModifiers modifiers) |
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{ |
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_lastPosition = pt; |
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RawDragEvent rawEvent = new RawDragEvent(_dragDrop, type, root, pt, _draggedData, _allowedEffects); |
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var tl = root.GetSelfAndVisualAncestors().OfType<TopLevel>().FirstOrDefault(); |
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tl.PlatformImpl.Input(rawEvent); |
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var effect = GetPreferredEffect(rawEvent.Effects & _allowedEffects, modifiers); |
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UpdateCursor(root, effect); |
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return effect; |
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} |
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private DragDropEffects GetPreferredEffect(DragDropEffects effect, InputModifiers modifiers) |
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{ |
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if (effect == DragDropEffects.Copy || effect == DragDropEffects.Move || effect == DragDropEffects.Link || effect == DragDropEffects.None) |
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return effect; // No need to check for the modifiers.
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if (effect.HasFlag(DragDropEffects.Link) && modifiers.HasFlag(InputModifiers.Alt)) |
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return DragDropEffects.Link; |
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if (effect.HasFlag(DragDropEffects.Copy) && modifiers.HasFlag(InputModifiers.Control)) |
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return DragDropEffects.Copy; |
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return DragDropEffects.Move; |
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} |
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private StandardCursorType GetCursorForDropEffect(DragDropEffects effects) |
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{ |
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if (effects.HasFlag(DragDropEffects.Copy)) |
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return StandardCursorType.DragCopy; |
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if (effects.HasFlag(DragDropEffects.Move)) |
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return StandardCursorType.DragMove; |
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if (effects.HasFlag(DragDropEffects.Link)) |
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return StandardCursorType.DragLink; |
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return StandardCursorType.No; |
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} |
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private void UpdateCursor(IInputElement root, DragDropEffects effect) |
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{ |
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if (_lastRoot != root) |
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{ |
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if (_lastRoot is InputElement ieLast) |
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{ |
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if (_originalCursor == AvaloniaProperty.UnsetValue) |
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ieLast.ClearValue(InputElement.CursorProperty); |
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else |
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ieLast.Cursor = _originalCursor as Cursor; |
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} |
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if (root is InputElement ieNew) |
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{ |
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if (!ieNew.IsSet(InputElement.CursorProperty)) |
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_originalCursor = AvaloniaProperty.UnsetValue; |
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else |
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_originalCursor = root.Cursor; |
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} |
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else |
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_originalCursor = null; |
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_lastCursorType = StandardCursorType.Arrow; |
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_lastRoot = root; |
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} |
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if (root is InputElement ie) |
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{ |
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var ct = GetCursorForDropEffect(effect); |
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if (ct != _lastCursorType) |
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{ |
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_lastCursorType = ct; |
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ie.Cursor = new Cursor(ct); |
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} |
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} |
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} |
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private void CancelDragging() |
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{ |
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if (_lastRoot != null) |
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RaiseEventAndUpdateCursor(RawDragEventType.DragLeave, _lastRoot, _lastPosition, InputModifiers.None); |
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UpdateCursor(null, DragDropEffects.None); |
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_result.OnNext(DragDropEffects.None); |
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} |
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private void ProcessKeyEvents(RawKeyEventArgs e) |
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{ |
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if (e.Type == RawKeyEventType.KeyDown && e.Key == Key.Escape) |
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{ |
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if (_lastRoot != null) |
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RaiseEventAndUpdateCursor(RawDragEventType.DragLeave, _lastRoot, _lastPosition, e.Modifiers); |
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UpdateCursor(null, DragDropEffects.None); |
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_result.OnNext(DragDropEffects.None); |
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e.Handled = true; |
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} |
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else if (e.Key == Key.LeftCtrl || e.Key == Key.RightCtrl || e.Key == Key.LeftAlt || e.Key == Key.RightAlt) |
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RaiseEventAndUpdateCursor(RawDragEventType.DragOver, _lastRoot, _lastPosition, e.Modifiers); |
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} |
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private void ProcessMouseEvents(RawMouseEventArgs e) |
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{ |
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if (!_initialInputModifiers.HasValue) |
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_initialInputModifiers = e.InputModifiers & MOUSE_INPUTMODIFIERS; |
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void CheckDraggingAccepted(InputModifiers changedMouseButton) |
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{ |
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if (_initialInputModifiers.Value.HasFlag(changedMouseButton)) |
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{ |
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var result = RaiseEventAndUpdateCursor(RawDragEventType.Drop, e.Root, e.Position, e.InputModifiers); |
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UpdateCursor(null, DragDropEffects.None); |
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_result.OnNext(result); |
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} |
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else |
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CancelDragging(); |
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e.Handled = true; |
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} |
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switch (e.Type) |
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{ |
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case RawMouseEventType.LeftButtonDown: |
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case RawMouseEventType.RightButtonDown: |
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case RawMouseEventType.MiddleButtonDown: |
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case RawMouseEventType.NonClientLeftButtonDown: |
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CancelDragging(); |
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e.Handled = true; |
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return; |
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case RawMouseEventType.LeaveWindow: |
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RaiseEventAndUpdateCursor(RawDragEventType.DragLeave, e.Root, e.Position, e.InputModifiers); break; |
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case RawMouseEventType.LeftButtonUp: |
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CheckDraggingAccepted(InputModifiers.LeftMouseButton); break; |
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case RawMouseEventType.MiddleButtonUp: |
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CheckDraggingAccepted(InputModifiers.MiddleMouseButton); break; |
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case RawMouseEventType.RightButtonUp: |
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CheckDraggingAccepted(InputModifiers.RightMouseButton); break; |
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case RawMouseEventType.Move: |
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var mods = e.InputModifiers & MOUSE_INPUTMODIFIERS; |
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if (_initialInputModifiers.Value != mods) |
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{ |
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CancelDragging(); |
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e.Handled = true; |
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return; |
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} |
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if (e.Root != _lastRoot) |
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{ |
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if (_lastRoot != null) |
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RaiseEventAndUpdateCursor(RawDragEventType.DragLeave, _lastRoot, _lastRoot.PointToClient(e.Root.PointToScreen(e.Position)), e.InputModifiers); |
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RaiseEventAndUpdateCursor(RawDragEventType.DragEnter, e.Root, e.Position, e.InputModifiers); |
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} |
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else |
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RaiseEventAndUpdateCursor(RawDragEventType.DragOver, e.Root, e.Position, e.InputModifiers); |
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break; |
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} |
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} |
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} |
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} |
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@ -0,0 +1,15 @@ |
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namespace Avalonia.Input.DragDrop |
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{ |
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public static class DataFormats |
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{ |
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/// <summary>
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/// Dataformat for plaintext
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/// </summary>
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public static string Text = nameof(Text); |
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/// <summary>
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/// Dataformat for one or more filenames
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/// </summary>
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public static string FileNames = nameof(FileNames); |
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} |
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} |
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@ -0,0 +1,43 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Text; |
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namespace Avalonia.Input.DragDrop |
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{ |
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public class DataObject : IDataObject |
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{ |
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private readonly Dictionary<string, object> _items = new Dictionary<string, object>(); |
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public bool Contains(string dataFormat) |
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{ |
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return _items.ContainsKey(dataFormat); |
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} |
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public object Get(string dataFormat) |
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{ |
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if (_items.ContainsKey(dataFormat)) |
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return _items[dataFormat]; |
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return null; |
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} |
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public IEnumerable<string> GetDataFormats() |
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{ |
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return _items.Keys; |
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} |
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public IEnumerable<string> GetFileNames() |
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{ |
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return Get(DataFormats.FileNames) as IEnumerable<string>; |
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} |
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public string GetText() |
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{ |
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return Get(DataFormats.Text) as string; |
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} |
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public void Set(string dataFormat, object value) |
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{ |
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_items[dataFormat] = value; |
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} |
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} |
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} |
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@ -0,0 +1,54 @@ |
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using System.Threading.Tasks; |
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using Avalonia.Interactivity; |
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using Avalonia.Input.Platform; |
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namespace Avalonia.Input.DragDrop |
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{ |
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public static class DragDrop |
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{ |
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/// <summary>
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/// Event which is raised, when a drag-and-drop operation enters the element.
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/// </summary>
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public static RoutedEvent<DragEventArgs> DragEnterEvent = RoutedEvent.Register<DragEventArgs>("DragEnter", RoutingStrategies.Bubble, typeof(DragDrop)); |
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/// <summary>
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/// Event which is raised, when a drag-and-drop operation leaves the element.
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/// </summary>
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public static RoutedEvent<RoutedEventArgs> DragLeaveEvent = RoutedEvent.Register<RoutedEventArgs>("DragLeave", RoutingStrategies.Bubble, typeof(DragDrop)); |
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/// <summary>
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/// Event which is raised, when a drag-and-drop operation is updated while over the element.
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/// </summary>
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public static RoutedEvent<DragEventArgs> DragOverEvent = RoutedEvent.Register<DragEventArgs>("DragOver", RoutingStrategies.Bubble, typeof(DragDrop)); |
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/// <summary>
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/// Event which is raised, when a drag-and-drop operation should complete over the element.
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/// </summary>
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public static RoutedEvent<DragEventArgs> DropEvent = RoutedEvent.Register<DragEventArgs>("Drop", RoutingStrategies.Bubble, typeof(DragDrop)); |
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public static AvaloniaProperty<bool> AllowDropProperty = AvaloniaProperty.RegisterAttached<Interactive, bool>("AllowDrop", typeof(DragDrop), inherits: true); |
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/// <summary>
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/// Gets a value indicating whether the given element can be used as the target of a drag-and-drop operation.
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/// </summary>
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public static bool GetAllowDrop(Interactive interactive) |
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{ |
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return interactive.GetValue(AllowDropProperty); |
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} |
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/// <summary>
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/// Sets a value indicating whether the given interactive can be used as the target of a drag-and-drop operation.
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/// </summary>
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public static void SetAllowDrop(Interactive interactive, bool value) |
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{ |
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interactive.SetValue(AllowDropProperty, value); |
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} |
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/// <summary>
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/// Starts a dragging operation with the given <see cref="IDataObject"/> and returns the applied drop effect from the target.
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/// <seealso cref="DataObject"/>
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/// </summary>
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public static Task<DragDropEffects> DoDragDrop(IDataObject data, DragDropEffects allowedEffects) |
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{ |
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var src = AvaloniaLocator.Current.GetService<IPlatformDragSource>(); |
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return src?.DoDragDrop(data, allowedEffects) ?? Task.FromResult(DragDropEffects.None); |
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} |
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} |
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} |
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@ -0,0 +1,112 @@ |
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using Avalonia.Interactivity; |
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using Avalonia.VisualTree; |
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using System.Linq; |
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using Avalonia.Input.DragDrop.Raw; |
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using Avalonia.Input.Raw; |
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namespace Avalonia.Input.DragDrop |
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{ |
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public class DragDropDevice : IDragDropDevice |
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{ |
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public static readonly DragDropDevice Instance = new DragDropDevice(); |
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private Interactive _lastTarget = null; |
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private Interactive GetTarget(IInputElement root, Point local) |
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{ |
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var target = root.InputHitTest(local)?.GetSelfAndVisualAncestors()?.OfType<Interactive>()?.FirstOrDefault(); |
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if (target != null && DragDrop.GetAllowDrop(target)) |
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return target; |
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return null; |
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} |
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private DragDropEffects RaiseDragEvent(Interactive target, RoutedEvent<DragEventArgs> routedEvent, DragDropEffects operation, IDataObject data) |
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{ |
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if (target == null) |
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return DragDropEffects.None; |
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var args = new DragEventArgs(routedEvent, data) |
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{ |
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RoutedEvent = routedEvent, |
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DragEffects = operation |
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}; |
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target.RaiseEvent(args); |
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return args.DragEffects; |
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} |
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private DragDropEffects DragEnter(IInputElement inputRoot, Point point, IDataObject data, DragDropEffects effects) |
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{ |
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_lastTarget = GetTarget(inputRoot, point); |
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return RaiseDragEvent(_lastTarget, DragDrop.DragEnterEvent, effects, data); |
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} |
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private DragDropEffects DragOver(IInputElement inputRoot, Point point, IDataObject data, DragDropEffects effects) |
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{ |
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var target = GetTarget(inputRoot, point); |
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if (target == _lastTarget) |
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return RaiseDragEvent(target, DragDrop.DragOverEvent, effects, data); |
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try |
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{ |
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if (_lastTarget != null) |
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_lastTarget.RaiseEvent(new RoutedEventArgs(DragDrop.DragLeaveEvent)); |
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return RaiseDragEvent(target, DragDrop.DragEnterEvent, effects, data); |
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} |
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finally |
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{ |
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_lastTarget = target; |
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} |
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} |
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|
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private void DragLeave(IInputElement inputRoot) |
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{ |
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if (_lastTarget == null) |
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return; |
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try |
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{ |
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_lastTarget.RaiseEvent(new RoutedEventArgs(DragDrop.DragLeaveEvent)); |
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} |
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finally |
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{ |
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_lastTarget = null; |
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} |
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} |
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|
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private DragDropEffects Drop(IInputElement inputRoot, Point point, IDataObject data, DragDropEffects effects) |
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{ |
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try |
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{ |
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return RaiseDragEvent(_lastTarget, DragDrop.DropEvent, effects, data); |
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} |
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finally |
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{ |
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_lastTarget = null; |
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} |
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} |
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|
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public void ProcessRawEvent(RawInputEventArgs e) |
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{ |
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if (!e.Handled && e is RawDragEvent margs) |
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ProcessRawEvent(margs); |
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} |
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|
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private void ProcessRawEvent(RawDragEvent e) |
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{ |
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switch (e.Type) |
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{ |
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case RawDragEventType.DragEnter: |
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e.Effects = DragEnter(e.InputRoot, e.Location, e.Data, e.Effects); |
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break; |
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case RawDragEventType.DragOver: |
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e.Effects = DragOver(e.InputRoot, e.Location, e.Data, e.Effects); |
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break; |
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case RawDragEventType.DragLeave: |
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DragLeave(e.InputRoot); |
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break; |
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case RawDragEventType.Drop: |
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e.Effects = Drop(e.InputRoot, e.Location, e.Data, e.Effects); |
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break; |
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} |
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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; |
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|
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namespace Avalonia.Input.DragDrop |
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{ |
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[Flags] |
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public enum DragDropEffects |
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{ |
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None = 0, |
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Copy = 1, |
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Move = 2, |
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Link = 4, |
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} |
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} |
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@ -0,0 +1,18 @@ |
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using Avalonia.Interactivity; |
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|
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namespace Avalonia.Input.DragDrop |
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{ |
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public class DragEventArgs : RoutedEventArgs |
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{ |
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public DragDropEffects DragEffects { get; set; } |
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|
|||
public IDataObject Data { get; private set; } |
|||
|
|||
public DragEventArgs(RoutedEvent<DragEventArgs> routedEvent, IDataObject data) |
|||
: base(routedEvent) |
|||
{ |
|||
this.Data = data; |
|||
} |
|||
|
|||
} |
|||
} |
|||
@ -0,0 +1,39 @@ |
|||
using System.Collections.Generic; |
|||
|
|||
namespace Avalonia.Input.DragDrop |
|||
{ |
|||
/// <summary>
|
|||
/// Interface to access information about the data of a drag-and-drop operation.
|
|||
/// </summary>
|
|||
public interface IDataObject |
|||
{ |
|||
/// <summary>
|
|||
/// Lists all formats which are present in the DataObject.
|
|||
/// <seealso cref="DataFormats"/>
|
|||
/// </summary>
|
|||
IEnumerable<string> GetDataFormats(); |
|||
|
|||
/// <summary>
|
|||
/// Checks wether a given DataFormat is present in this object
|
|||
/// <seealso cref="DataFormats"/>
|
|||
/// </summary>
|
|||
bool Contains(string dataFormat); |
|||
|
|||
/// <summary>
|
|||
/// Returns the dragged text if the DataObject contains any text.
|
|||
/// <seealso cref="DataFormats.Text"/>
|
|||
/// </summary>
|
|||
string GetText(); |
|||
|
|||
/// <summary>
|
|||
/// Returns a list of filenames if the DataObject contains filenames.
|
|||
/// <seealso cref="DataFormats.FileNames"/>
|
|||
/// </summary>
|
|||
IEnumerable<string> GetFileNames(); |
|||
|
|||
/// <summary>
|
|||
/// Tries to get the data of the given DataFormat.
|
|||
/// </summary>
|
|||
object Get(string dataFormat); |
|||
} |
|||
} |
|||
@ -0,0 +1,8 @@ |
|||
using Avalonia.Input; |
|||
|
|||
namespace Avalonia.Input.DragDrop.Raw |
|||
{ |
|||
public interface IDragDropDevice : IInputDevice |
|||
{ |
|||
} |
|||
} |
|||
@ -0,0 +1,26 @@ |
|||
using System; |
|||
using Avalonia.Input; |
|||
using Avalonia.Input.Raw; |
|||
|
|||
namespace Avalonia.Input.DragDrop.Raw |
|||
{ |
|||
public class RawDragEvent : RawInputEventArgs |
|||
{ |
|||
public IInputElement InputRoot { get; } |
|||
public Point Location { get; } |
|||
public IDataObject Data { get; } |
|||
public DragDropEffects Effects { get; set; } |
|||
public RawDragEventType Type { get; } |
|||
|
|||
public RawDragEvent(IDragDropDevice inputDevice, RawDragEventType type, |
|||
IInputElement inputRoot, Point location, IDataObject data, DragDropEffects effects) |
|||
:base(inputDevice, 0) |
|||
{ |
|||
Type = type; |
|||
InputRoot = inputRoot; |
|||
Location = location; |
|||
Data = data; |
|||
Effects = effects; |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,10 @@ |
|||
namespace Avalonia.Input.DragDrop.Raw |
|||
{ |
|||
public enum RawDragEventType |
|||
{ |
|||
DragEnter, |
|||
DragOver, |
|||
DragLeave, |
|||
Drop |
|||
} |
|||
} |
|||
@ -0,0 +1,14 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.Text; |
|||
using System.Threading.Tasks; |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Interactivity; |
|||
|
|||
namespace Avalonia.Input.Platform |
|||
{ |
|||
public interface IPlatformDragSource |
|||
{ |
|||
Task<DragDropEffects> DoDragDrop(IDataObject data, DragDropEffects allowedEffects); |
|||
} |
|||
} |
|||
@ -0,0 +1,125 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.Data; |
|||
using System.IO; |
|||
using System.Linq; |
|||
using System.Linq.Expressions; |
|||
using System.Reactive.Linq; |
|||
using System.Reactive.Subjects; |
|||
using System.Runtime.InteropServices; |
|||
using System.Runtime.Serialization.Formatters.Binary; |
|||
using System.Threading.Tasks; |
|||
using Avalonia.Controls; |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Input.Platform; |
|||
using Avalonia.Input; |
|||
using Avalonia.Input.Raw; |
|||
using MonoMac; |
|||
using MonoMac.AppKit; |
|||
using MonoMac.CoreGraphics; |
|||
using MonoMac.Foundation; |
|||
using MonoMac.OpenGL; |
|||
|
|||
namespace Avalonia.MonoMac |
|||
{ |
|||
public class DragSource : NSDraggingSource, IPlatformDragSource |
|||
{ |
|||
private const string NSPasteboardTypeString = "public.utf8-plain-text"; |
|||
private const string NSPasteboardTypeFileUrl = "public.file-url"; |
|||
|
|||
private readonly Subject<DragDropEffects> _result = new Subject<DragDropEffects>(); |
|||
private readonly IInputManager _inputManager; |
|||
private DragDropEffects _allowedEffects; |
|||
|
|||
public override bool IgnoreModifierKeysWhileDragging => false; |
|||
|
|||
public DragSource() |
|||
{ |
|||
_inputManager = AvaloniaLocator.Current.GetService<IInputManager>(); |
|||
} |
|||
|
|||
private string DataFormatToUTI(string s) |
|||
{ |
|||
if (s == DataFormats.FileNames) |
|||
return NSPasteboardTypeFileUrl; |
|||
if (s == DataFormats.Text) |
|||
return NSPasteboardTypeString; |
|||
return s; |
|||
} |
|||
|
|||
private NSDraggingItem CreateDraggingItem(string format, object data) |
|||
{ |
|||
var pasteboardItem = new NSPasteboardItem(); |
|||
NSData nsData; |
|||
if (data is string s) |
|||
{ |
|||
if (format == DataFormats.FileNames) |
|||
s = new Uri(s).AbsoluteUri; // Ensure file uris...
|
|||
nsData = NSData.FromString(s); |
|||
} |
|||
else if (data is Stream strm) |
|||
nsData = NSData.FromStream(strm); |
|||
else if (data is byte[] bytes) |
|||
nsData = NSData.FromArray(bytes); |
|||
else |
|||
{ |
|||
BinaryFormatter bf = new BinaryFormatter(); |
|||
using (var ms = new MemoryStream()) |
|||
{ |
|||
bf.Serialize(ms, data); |
|||
ms.Position = 0; |
|||
nsData = NSData.FromStream(ms); |
|||
} |
|||
} |
|||
pasteboardItem.SetDataForType(nsData, DataFormatToUTI(format)); |
|||
|
|||
NSPasteboardWriting writing = new NSPasteboardWriting(pasteboardItem.Handle); |
|||
|
|||
return new NSDraggingItem(writing); |
|||
} |
|||
|
|||
public IEnumerable<NSDraggingItem> CreateDraggingItems(string format, object data) |
|||
{ |
|||
if (format == DataFormats.FileNames && data is IEnumerable<string> files) |
|||
{ |
|||
foreach (var file in files) |
|||
yield return CreateDraggingItem(format, file); |
|||
|
|||
yield break; |
|||
} |
|||
|
|||
yield return CreateDraggingItem(format, data); |
|||
} |
|||
|
|||
|
|||
public async Task<DragDropEffects> DoDragDrop(IDataObject data, DragDropEffects allowedEffects) |
|||
{ |
|||
// We need the TopLevelImpl + a mouse location so we just wait for the next event.
|
|||
var mouseEv = await _inputManager.PreProcess.OfType<RawMouseEventArgs>().FirstAsync(); |
|||
var view = ((mouseEv.Root as TopLevel)?.PlatformImpl as TopLevelImpl)?.View; |
|||
if (view == null) |
|||
return DragDropEffects.None; |
|||
|
|||
// Prepare the source event:
|
|||
var pt = view.TranslateLocalPoint(mouseEv.Position).ToMonoMacPoint(); |
|||
var ev = NSEvent.MouseEvent(NSEventType.LeftMouseDown, pt, 0, 0, 0, null, 0, 0, 0); |
|||
|
|||
_allowedEffects = allowedEffects; |
|||
var items = data.GetDataFormats().SelectMany(fmt => CreateDraggingItems(fmt, data.Get(fmt))).ToArray(); |
|||
view.BeginDraggingSession(items ,ev, this); |
|||
|
|||
return await _result; |
|||
} |
|||
|
|||
public override NSDragOperation DraggingSourceOperationMaskForLocal(bool flag) |
|||
{ |
|||
return DraggingInfo.ConvertDragOperation(_allowedEffects); |
|||
} |
|||
|
|||
public override void DraggedImageEndedAtOperation(NSImage image, CGPoint screenPoint, NSDragOperation operation) |
|||
{ |
|||
_result.OnNext(DraggingInfo.ConvertDragOperation(operation)); |
|||
_result.OnCompleted(); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,90 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.Linq; |
|||
using Avalonia.Input.DragDrop; |
|||
using MonoMac.AppKit; |
|||
using MonoMac.Foundation; |
|||
|
|||
namespace Avalonia.MonoMac |
|||
{ |
|||
class DraggingInfo : IDataObject |
|||
{ |
|||
private readonly NSDraggingInfo _info; |
|||
|
|||
public DraggingInfo(NSDraggingInfo info) |
|||
{ |
|||
_info = info; |
|||
} |
|||
|
|||
internal static NSDragOperation ConvertDragOperation(DragDropEffects d) |
|||
{ |
|||
NSDragOperation result = NSDragOperation.None; |
|||
if (d.HasFlag(DragDropEffects.Copy)) |
|||
result |= NSDragOperation.Copy; |
|||
if (d.HasFlag(DragDropEffects.Link)) |
|||
result |= NSDragOperation.Link; |
|||
if (d.HasFlag(DragDropEffects.Move)) |
|||
result |= NSDragOperation.Move; |
|||
return result; |
|||
} |
|||
|
|||
internal static DragDropEffects ConvertDragOperation(NSDragOperation d) |
|||
{ |
|||
DragDropEffects result = DragDropEffects.None; |
|||
if (d.HasFlag(NSDragOperation.Copy)) |
|||
result |= DragDropEffects.Copy; |
|||
if (d.HasFlag(NSDragOperation.Link)) |
|||
result |= DragDropEffects.Link; |
|||
if (d.HasFlag(NSDragOperation.Move)) |
|||
result |= DragDropEffects.Move; |
|||
return result; |
|||
} |
|||
|
|||
public Point Location => new Point(_info.DraggingLocation.X, _info.DraggingLocation.Y); |
|||
|
|||
public IEnumerable<string> GetDataFormats() |
|||
{ |
|||
return _info.DraggingPasteboard.Types.Select(NSTypeToWellknownType); |
|||
} |
|||
|
|||
private string NSTypeToWellknownType(string type) |
|||
{ |
|||
if (type == NSPasteboard.NSStringType) |
|||
return DataFormats.Text; |
|||
if (type == NSPasteboard.NSFilenamesType) |
|||
return DataFormats.FileNames; |
|||
return type; |
|||
} |
|||
|
|||
public string GetText() |
|||
{ |
|||
return _info.DraggingPasteboard.GetStringForType(NSPasteboard.NSStringType); |
|||
} |
|||
|
|||
public IEnumerable<string> GetFileNames() |
|||
{ |
|||
using(var fileNames = (NSArray)_info.DraggingPasteboard.GetPropertyListForType(NSPasteboard.NSFilenamesType)) |
|||
{ |
|||
if (fileNames != null) |
|||
return NSArray.StringArrayFromHandle(fileNames.Handle); |
|||
} |
|||
|
|||
return Enumerable.Empty<string>(); |
|||
} |
|||
|
|||
public bool Contains(string dataFormat) |
|||
{ |
|||
return GetDataFormats().Any(f => f == dataFormat); |
|||
} |
|||
|
|||
public object Get(string dataFormat) |
|||
{ |
|||
if (dataFormat == DataFormats.Text) |
|||
return GetText(); |
|||
if (dataFormat == DataFormats.FileNames) |
|||
return GetFileNames(); |
|||
|
|||
return _info.DraggingPasteboard.GetDataForType(dataFormat).ToArray(); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,80 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.ComponentModel; |
|||
using System.Linq; |
|||
using System.Text; |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Win32.Interop; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
static class ClipboardFormats |
|||
{ |
|||
private const int MAX_FORMAT_NAME_LENGTH = 260; |
|||
|
|||
class ClipboardFormat |
|||
{ |
|||
public short Format { get; private set; } |
|||
public string Name { get; private set; } |
|||
public short[] Synthesized { get; private set; } |
|||
|
|||
public ClipboardFormat(string name, short format, params short[] synthesized) |
|||
{ |
|||
Format = format; |
|||
Name = name; |
|||
Synthesized = synthesized; |
|||
} |
|||
} |
|||
|
|||
private static readonly List<ClipboardFormat> FormatList = new List<ClipboardFormat>() |
|||
{ |
|||
new ClipboardFormat(DataFormats.Text, (short)UnmanagedMethods.ClipboardFormat.CF_UNICODETEXT, (short)UnmanagedMethods.ClipboardFormat.CF_TEXT), |
|||
new ClipboardFormat(DataFormats.FileNames, (short)UnmanagedMethods.ClipboardFormat.CF_HDROP), |
|||
}; |
|||
|
|||
|
|||
private static string QueryFormatName(short format) |
|||
{ |
|||
StringBuilder sb = new StringBuilder(MAX_FORMAT_NAME_LENGTH); |
|||
if (UnmanagedMethods.GetClipboardFormatName(format, sb, sb.Capacity) > 0) |
|||
return sb.ToString(); |
|||
return null; |
|||
} |
|||
|
|||
public static string GetFormat(short format) |
|||
{ |
|||
lock (FormatList) |
|||
{ |
|||
var pd = FormatList.FirstOrDefault(f => f.Format == format || Array.IndexOf(f.Synthesized, format) >= 0); |
|||
if (pd == null) |
|||
{ |
|||
string name = QueryFormatName(format); |
|||
if (string.IsNullOrEmpty(name)) |
|||
name = string.Format("Unknown_Format_{0}", format); |
|||
pd = new ClipboardFormat(name, format); |
|||
FormatList.Add(pd); |
|||
} |
|||
return pd.Name; |
|||
} |
|||
} |
|||
|
|||
public static short GetFormat(string format) |
|||
{ |
|||
lock (FormatList) |
|||
{ |
|||
var pd = FormatList.FirstOrDefault(f => StringComparer.OrdinalIgnoreCase.Equals(f.Name, format)); |
|||
if (pd == null) |
|||
{ |
|||
int id = UnmanagedMethods.RegisterClipboardFormat(format); |
|||
if (id == 0) |
|||
throw new Win32Exception(); |
|||
pd = new ClipboardFormat(format, (short)id); |
|||
FormatList.Add(pd); |
|||
} |
|||
return pd.Format; |
|||
} |
|||
} |
|||
|
|||
|
|||
} |
|||
} |
|||
@ -0,0 +1,361 @@ |
|||
using System; |
|||
using System.Linq; |
|||
using System.Collections.Generic; |
|||
using System.Runtime.InteropServices; |
|||
using System.Runtime.InteropServices.ComTypes; |
|||
using System.Text; |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Win32.Interop; |
|||
using IDataObject = Avalonia.Input.DragDrop.IDataObject; |
|||
using IOleDataObject = System.Runtime.InteropServices.ComTypes.IDataObject; |
|||
using System.IO; |
|||
using System.Runtime.Serialization.Formatters.Binary; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
class DataObject : IDataObject, IOleDataObject |
|||
{ |
|||
// Compatibility with WinForms + WPF...
|
|||
internal static readonly byte[] SerializedObjectGUID = new Guid("FD9EA796-3B13-4370-A679-56106BB288FB").ToByteArray(); |
|||
|
|||
class FormatEnumerator : IEnumFORMATETC |
|||
{ |
|||
private FORMATETC[] _formats; |
|||
private int _current; |
|||
|
|||
private FormatEnumerator(FORMATETC[] formats, int current) |
|||
{ |
|||
_formats = formats; |
|||
_current = current; |
|||
} |
|||
|
|||
public FormatEnumerator(IDataObject dataobj) |
|||
{ |
|||
_formats = dataobj.GetDataFormats().Select(ConvertToFormatEtc).ToArray(); |
|||
_current = 0; |
|||
} |
|||
|
|||
private FORMATETC ConvertToFormatEtc(string aFormatName) |
|||
{ |
|||
FORMATETC result = default(FORMATETC); |
|||
result.cfFormat = ClipboardFormats.GetFormat(aFormatName); |
|||
result.dwAspect = DVASPECT.DVASPECT_CONTENT; |
|||
result.ptd = IntPtr.Zero; |
|||
result.lindex = -1; |
|||
result.tymed = TYMED.TYMED_HGLOBAL; |
|||
return result; |
|||
} |
|||
|
|||
public void Clone(out IEnumFORMATETC newEnum) |
|||
{ |
|||
newEnum = new FormatEnumerator(_formats, _current); |
|||
} |
|||
|
|||
public int Next(int celt, FORMATETC[] rgelt, int[] pceltFetched) |
|||
{ |
|||
if (rgelt == null) |
|||
return unchecked((int)UnmanagedMethods.HRESULT.E_INVALIDARG); |
|||
|
|||
int i = 0; |
|||
while (i < celt && _current < _formats.Length) |
|||
{ |
|||
rgelt[i] = _formats[_current]; |
|||
_current++; |
|||
i++; |
|||
} |
|||
if (pceltFetched != null) |
|||
pceltFetched[0] = i; |
|||
|
|||
if (i != celt) |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_FALSE); |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
|
|||
public int Reset() |
|||
{ |
|||
_current = 0; |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
|
|||
public int Skip(int celt) |
|||
{ |
|||
_current += Math.Min(celt, int.MaxValue - _current); |
|||
if (_current >= _formats.Length) |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_FALSE); |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
} |
|||
|
|||
private const int DV_E_TYMED = unchecked((int)0x80040069); |
|||
private const int DV_E_DVASPECT = unchecked((int)0x8004006B); |
|||
private const int DV_E_FORMATETC = unchecked((int)0x80040064); |
|||
private const int OLE_E_ADVISENOTSUPPORTED = unchecked((int)0x80040003); |
|||
private const int STG_E_MEDIUMFULL = unchecked((int)0x80030070); |
|||
private const int GMEM_ZEROINIT = 0x0040; |
|||
private const int GMEM_MOVEABLE = 0x0002; |
|||
|
|||
|
|||
IDataObject _wrapped; |
|||
|
|||
public DataObject(IDataObject wrapped) |
|||
{ |
|||
_wrapped = wrapped; |
|||
} |
|||
|
|||
#region IDataObject
|
|||
bool IDataObject.Contains(string dataFormat) |
|||
{ |
|||
return _wrapped.Contains(dataFormat); |
|||
} |
|||
|
|||
IEnumerable<string> IDataObject.GetDataFormats() |
|||
{ |
|||
return _wrapped.GetDataFormats(); |
|||
} |
|||
|
|||
IEnumerable<string> IDataObject.GetFileNames() |
|||
{ |
|||
return _wrapped.GetFileNames(); |
|||
} |
|||
|
|||
string IDataObject.GetText() |
|||
{ |
|||
return _wrapped.GetText(); |
|||
} |
|||
|
|||
object IDataObject.Get(string dataFormat) |
|||
{ |
|||
return _wrapped.Get(dataFormat); |
|||
} |
|||
#endregion
|
|||
|
|||
#region IOleDataObject
|
|||
|
|||
int IOleDataObject.DAdvise(ref FORMATETC pFormatetc, ADVF advf, IAdviseSink adviseSink, out int connection) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
return ole.DAdvise(ref pFormatetc, advf, adviseSink, out connection); |
|||
connection = 0; |
|||
return OLE_E_ADVISENOTSUPPORTED; |
|||
} |
|||
|
|||
void IOleDataObject.DUnadvise(int connection) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
ole.DUnadvise(connection); |
|||
Marshal.ThrowExceptionForHR(OLE_E_ADVISENOTSUPPORTED); |
|||
} |
|||
|
|||
int IOleDataObject.EnumDAdvise(out IEnumSTATDATA enumAdvise) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
return ole.EnumDAdvise(out enumAdvise); |
|||
|
|||
enumAdvise = null; |
|||
return OLE_E_ADVISENOTSUPPORTED; |
|||
} |
|||
|
|||
IEnumFORMATETC IOleDataObject.EnumFormatEtc(DATADIR direction) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
return ole.EnumFormatEtc(direction); |
|||
if (direction == DATADIR.DATADIR_GET) |
|||
return new FormatEnumerator(_wrapped); |
|||
throw new NotSupportedException(); |
|||
} |
|||
|
|||
int IOleDataObject.GetCanonicalFormatEtc(ref FORMATETC formatIn, out FORMATETC formatOut) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
return ole.GetCanonicalFormatEtc(ref formatIn, out formatOut); |
|||
|
|||
formatOut = new FORMATETC(); |
|||
formatOut.ptd = IntPtr.Zero; |
|||
return unchecked((int)UnmanagedMethods.HRESULT.E_NOTIMPL); |
|||
} |
|||
|
|||
void IOleDataObject.GetData(ref FORMATETC format, out STGMEDIUM medium) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
{ |
|||
ole.GetData(ref format, out medium); |
|||
return; |
|||
} |
|||
if(!format.tymed.HasFlag(TYMED.TYMED_HGLOBAL)) |
|||
Marshal.ThrowExceptionForHR(DV_E_TYMED); |
|||
|
|||
if (format.dwAspect != DVASPECT.DVASPECT_CONTENT) |
|||
Marshal.ThrowExceptionForHR(DV_E_DVASPECT); |
|||
|
|||
string fmt = ClipboardFormats.GetFormat(format.cfFormat); |
|||
if (string.IsNullOrEmpty(fmt) || !_wrapped.Contains(fmt)) |
|||
Marshal.ThrowExceptionForHR(DV_E_FORMATETC); |
|||
|
|||
medium = default(STGMEDIUM); |
|||
medium.tymed = TYMED.TYMED_HGLOBAL; |
|||
int result = WriteDataToHGlobal(fmt, ref medium.unionmember); |
|||
Marshal.ThrowExceptionForHR(result); |
|||
} |
|||
|
|||
void IOleDataObject.GetDataHere(ref FORMATETC format, ref STGMEDIUM medium) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
{ |
|||
ole.GetDataHere(ref format, ref medium); |
|||
return; |
|||
} |
|||
|
|||
if (medium.tymed != TYMED.TYMED_HGLOBAL || !format.tymed.HasFlag(TYMED.TYMED_HGLOBAL)) |
|||
Marshal.ThrowExceptionForHR(DV_E_TYMED); |
|||
|
|||
if (format.dwAspect != DVASPECT.DVASPECT_CONTENT) |
|||
Marshal.ThrowExceptionForHR(DV_E_DVASPECT); |
|||
|
|||
string fmt = ClipboardFormats.GetFormat(format.cfFormat); |
|||
if (string.IsNullOrEmpty(fmt) || !_wrapped.Contains(fmt)) |
|||
Marshal.ThrowExceptionForHR(DV_E_FORMATETC); |
|||
|
|||
if (medium.unionmember == IntPtr.Zero) |
|||
Marshal.ThrowExceptionForHR(STG_E_MEDIUMFULL); |
|||
|
|||
int result = WriteDataToHGlobal(fmt, ref medium.unionmember); |
|||
Marshal.ThrowExceptionForHR(result); |
|||
} |
|||
|
|||
int IOleDataObject.QueryGetData(ref FORMATETC format) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
return ole.QueryGetData(ref format); |
|||
if (format.dwAspect != DVASPECT.DVASPECT_CONTENT) |
|||
return DV_E_DVASPECT; |
|||
if (!format.tymed.HasFlag(TYMED.TYMED_HGLOBAL)) |
|||
return DV_E_TYMED; |
|||
|
|||
string dataFormat = ClipboardFormats.GetFormat(format.cfFormat); |
|||
if (!string.IsNullOrEmpty(dataFormat) && _wrapped.Contains(dataFormat)) |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
return DV_E_FORMATETC; |
|||
} |
|||
|
|||
void IOleDataObject.SetData(ref FORMATETC formatIn, ref STGMEDIUM medium, bool release) |
|||
{ |
|||
if (_wrapped is IOleDataObject ole) |
|||
{ |
|||
ole.SetData(ref formatIn, ref medium, release); |
|||
return; |
|||
} |
|||
Marshal.ThrowExceptionForHR(unchecked((int)UnmanagedMethods.HRESULT.E_NOTIMPL)); |
|||
} |
|||
|
|||
private int WriteDataToHGlobal(string dataFormat, ref IntPtr hGlobal) |
|||
{ |
|||
object data = _wrapped.Get(dataFormat); |
|||
if (dataFormat == DataFormats.Text || data is string) |
|||
return WriteStringToHGlobal(ref hGlobal, Convert.ToString(data)); |
|||
if (dataFormat == DataFormats.FileNames && data is IEnumerable<string> files) |
|||
return WriteFileListToHGlobal(ref hGlobal, files); |
|||
if (data is Stream stream) |
|||
{ |
|||
byte[] buffer = new byte[stream.Length - stream.Position]; |
|||
stream.Read(buffer, 0, buffer.Length); |
|||
return WriteBytesToHGlobal(ref hGlobal, buffer); |
|||
} |
|||
if (data is IEnumerable<byte> bytes) |
|||
{ |
|||
var byteArr = bytes is byte[] ? (byte[])bytes : bytes.ToArray(); |
|||
return WriteBytesToHGlobal(ref hGlobal, byteArr); |
|||
} |
|||
return WriteBytesToHGlobal(ref hGlobal, SerializeObject(data)); |
|||
} |
|||
|
|||
private byte[] SerializeObject(object data) |
|||
{ |
|||
using (var ms = new MemoryStream()) |
|||
{ |
|||
ms.Write(SerializedObjectGUID, 0, SerializedObjectGUID.Length); |
|||
BinaryFormatter binaryFormatter = new BinaryFormatter(); |
|||
binaryFormatter.Serialize(ms, data); |
|||
return ms.ToArray(); |
|||
} |
|||
} |
|||
|
|||
private int WriteBytesToHGlobal(ref IntPtr hGlobal, byte[] data) |
|||
{ |
|||
int required = data.Length; |
|||
if (hGlobal == IntPtr.Zero) |
|||
hGlobal = UnmanagedMethods.GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, required); |
|||
|
|||
long available = UnmanagedMethods.GlobalSize(hGlobal).ToInt64(); |
|||
if (required > available) |
|||
return STG_E_MEDIUMFULL; |
|||
|
|||
IntPtr ptr = UnmanagedMethods.GlobalLock(hGlobal); |
|||
try |
|||
{ |
|||
Marshal.Copy(data, 0, ptr, data.Length); |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
finally |
|||
{ |
|||
UnmanagedMethods.GlobalUnlock(hGlobal); |
|||
} |
|||
} |
|||
|
|||
private int WriteFileListToHGlobal(ref IntPtr hGlobal, IEnumerable<string> files) |
|||
{ |
|||
if (!files?.Any() ?? false) |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
|
|||
char[] filesStr = (string.Join("\0", files) + "\0\0").ToCharArray(); |
|||
_DROPFILES df = new _DROPFILES(); |
|||
df.pFiles = Marshal.SizeOf<_DROPFILES>(); |
|||
df.fWide = true; |
|||
|
|||
int required = (filesStr.Length * sizeof(char)) + Marshal.SizeOf<_DROPFILES>(); |
|||
if (hGlobal == IntPtr.Zero) |
|||
hGlobal = UnmanagedMethods.GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, required); |
|||
|
|||
long available = UnmanagedMethods.GlobalSize(hGlobal).ToInt64(); |
|||
if (required > available) |
|||
return STG_E_MEDIUMFULL; |
|||
|
|||
IntPtr ptr = UnmanagedMethods.GlobalLock(hGlobal); |
|||
try |
|||
{ |
|||
Marshal.StructureToPtr(df, ptr, false); |
|||
|
|||
Marshal.Copy(filesStr, 0, ptr + Marshal.SizeOf<_DROPFILES>(), filesStr.Length); |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
finally |
|||
{ |
|||
UnmanagedMethods.GlobalUnlock(hGlobal); |
|||
} |
|||
} |
|||
|
|||
private int WriteStringToHGlobal(ref IntPtr hGlobal, string data) |
|||
{ |
|||
int required = (data.Length + 1) * sizeof(char); |
|||
if (hGlobal == IntPtr.Zero) |
|||
hGlobal = UnmanagedMethods.GlobalAlloc(GMEM_MOVEABLE|GMEM_ZEROINIT, required); |
|||
|
|||
long available = UnmanagedMethods.GlobalSize(hGlobal).ToInt64(); |
|||
if (required > available) |
|||
return STG_E_MEDIUMFULL; |
|||
|
|||
IntPtr ptr = UnmanagedMethods.GlobalLock(hGlobal); |
|||
try |
|||
{ |
|||
char[] chars = (data + '\0').ToCharArray(); |
|||
Marshal.Copy(chars, 0, ptr, chars.Length); |
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
finally |
|||
{ |
|||
UnmanagedMethods.GlobalUnlock(hGlobal); |
|||
} |
|||
} |
|||
|
|||
#endregion
|
|||
} |
|||
} |
|||
@ -0,0 +1,27 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.Text; |
|||
using System.Threading.Tasks; |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Input.Platform; |
|||
using Avalonia.Threading; |
|||
using Avalonia.Win32.Interop; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
class DragSource : IPlatformDragSource |
|||
{ |
|||
public Task<DragDropEffects> DoDragDrop(IDataObject data, DragDropEffects allowedEffects) |
|||
{ |
|||
Dispatcher.UIThread.VerifyAccess(); |
|||
|
|||
OleDragSource src = new OleDragSource(); |
|||
DataObject dataObject = new DataObject(data); |
|||
int allowed = (int)OleDropTarget.ConvertDropEffect(allowedEffects); |
|||
|
|||
int[] finalEffect = new int[1]; |
|||
UnmanagedMethods.DoDragDrop(dataObject, src, allowed, finalEffect); |
|||
|
|||
return Task.FromResult(OleDropTarget.ConvertDropEffect((DropEffect)finalEffect[0]));} |
|||
} |
|||
} |
|||
@ -0,0 +1,47 @@ |
|||
using System; |
|||
using System.Threading; |
|||
using Avalonia.Platform; |
|||
using Avalonia.Threading; |
|||
using Avalonia.Win32.Interop; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
class OleContext |
|||
{ |
|||
private static OleContext fCurrent; |
|||
|
|||
internal static OleContext Current |
|||
{ |
|||
get |
|||
{ |
|||
if (!IsValidOleThread()) |
|||
return null; |
|||
|
|||
if (fCurrent == null) |
|||
fCurrent = new OleContext(); |
|||
return fCurrent; |
|||
} |
|||
} |
|||
|
|||
|
|||
private OleContext() |
|||
{ |
|||
if (UnmanagedMethods.OleInitialize(IntPtr.Zero) != UnmanagedMethods.HRESULT.S_OK) |
|||
throw new SystemException("Failed to initialize OLE"); |
|||
} |
|||
|
|||
private static bool IsValidOleThread() |
|||
{ |
|||
return Dispatcher.UIThread.CheckAccess() && |
|||
Thread.CurrentThread.GetApartmentState() == ApartmentState.STA; |
|||
} |
|||
|
|||
internal bool RegisterDragDrop(IPlatformHandle hwnd, IDropTarget target) |
|||
{ |
|||
if (hwnd?.HandleDescriptor != "HWND" || target == null) |
|||
return false; |
|||
|
|||
return UnmanagedMethods.RegisterDragDrop(hwnd.Handle, target) == UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,171 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.IO; |
|||
using System.Linq; |
|||
using System.Runtime.InteropServices; |
|||
using System.Runtime.InteropServices.ComTypes; |
|||
using System.Runtime.Serialization.Formatters.Binary; |
|||
using System.Text; |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Win32.Interop; |
|||
using IDataObject = System.Runtime.InteropServices.ComTypes.IDataObject; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
class OleDataObject : Avalonia.Input.DragDrop.IDataObject |
|||
{ |
|||
private IDataObject _wrapped; |
|||
|
|||
public OleDataObject(IDataObject wrapped) |
|||
{ |
|||
_wrapped = wrapped; |
|||
} |
|||
|
|||
public bool Contains(string dataFormat) |
|||
{ |
|||
return GetDataFormatsCore().Any(df => StringComparer.OrdinalIgnoreCase.Equals(df, dataFormat)); |
|||
} |
|||
|
|||
public IEnumerable<string> GetDataFormats() |
|||
{ |
|||
return GetDataFormatsCore().Distinct(); |
|||
} |
|||
|
|||
public string GetText() |
|||
{ |
|||
return GetDataFromOleHGLOBAL(DataFormats.Text, DVASPECT.DVASPECT_CONTENT) as string; |
|||
} |
|||
|
|||
public IEnumerable<string> GetFileNames() |
|||
{ |
|||
return GetDataFromOleHGLOBAL(DataFormats.FileNames, DVASPECT.DVASPECT_CONTENT) as IEnumerable<string>; |
|||
} |
|||
|
|||
public object Get(string dataFormat) |
|||
{ |
|||
return GetDataFromOleHGLOBAL(dataFormat, DVASPECT.DVASPECT_CONTENT); |
|||
} |
|||
|
|||
private object GetDataFromOleHGLOBAL(string format, DVASPECT aspect) |
|||
{ |
|||
FORMATETC formatEtc = new FORMATETC(); |
|||
formatEtc.cfFormat = ClipboardFormats.GetFormat(format); |
|||
formatEtc.dwAspect = aspect; |
|||
formatEtc.lindex = -1; |
|||
formatEtc.tymed = TYMED.TYMED_HGLOBAL; |
|||
if (_wrapped.QueryGetData(ref formatEtc) == 0) |
|||
{ |
|||
_wrapped.GetData(ref formatEtc, out STGMEDIUM medium); |
|||
try |
|||
{ |
|||
if (medium.unionmember != IntPtr.Zero && medium.tymed == TYMED.TYMED_HGLOBAL) |
|||
{ |
|||
if (format == DataFormats.Text) |
|||
return ReadStringFromHGlobal(medium.unionmember); |
|||
if (format == DataFormats.FileNames) |
|||
return ReadFileNamesFromHGlobal(medium.unionmember); |
|||
|
|||
byte[] data = ReadBytesFromHGlobal(medium.unionmember); |
|||
|
|||
if (IsSerializedObject(data)) |
|||
{ |
|||
using (var ms = new MemoryStream(data)) |
|||
{ |
|||
ms.Position = DataObject.SerializedObjectGUID.Length; |
|||
BinaryFormatter binaryFormatter = new BinaryFormatter(); |
|||
return binaryFormatter.Deserialize(ms); |
|||
} |
|||
} |
|||
return data; |
|||
} |
|||
} |
|||
finally |
|||
{ |
|||
UnmanagedMethods.ReleaseStgMedium(ref medium); |
|||
} |
|||
} |
|||
return null; |
|||
} |
|||
|
|||
private bool IsSerializedObject(byte[] data) |
|||
{ |
|||
if (data.Length < DataObject.SerializedObjectGUID.Length) |
|||
return false; |
|||
for (int i = 0; i < DataObject.SerializedObjectGUID.Length; i++) |
|||
if (data[i] != DataObject.SerializedObjectGUID[i]) |
|||
return false; |
|||
return true; |
|||
} |
|||
|
|||
private static IEnumerable<string> ReadFileNamesFromHGlobal(IntPtr hGlobal) |
|||
{ |
|||
List<string> files = new List<string>(); |
|||
int fileCount = UnmanagedMethods.DragQueryFile(hGlobal, -1, null, 0); |
|||
if (fileCount > 0) |
|||
{ |
|||
for (int i = 0; i < fileCount; i++) |
|||
{ |
|||
int pathLen = UnmanagedMethods.DragQueryFile(hGlobal, i, null, 0); |
|||
StringBuilder sb = new StringBuilder(pathLen+1); |
|||
|
|||
if (UnmanagedMethods.DragQueryFile(hGlobal, i, sb, sb.Capacity) == pathLen) |
|||
{ |
|||
files.Add(sb.ToString()); |
|||
} |
|||
} |
|||
} |
|||
return files; |
|||
} |
|||
|
|||
private static string ReadStringFromHGlobal(IntPtr hGlobal) |
|||
{ |
|||
IntPtr ptr = UnmanagedMethods.GlobalLock(hGlobal); |
|||
try |
|||
{ |
|||
return Marshal.PtrToStringAuto(ptr); |
|||
} |
|||
finally |
|||
{ |
|||
UnmanagedMethods.GlobalUnlock(hGlobal); |
|||
} |
|||
} |
|||
|
|||
private static byte[] ReadBytesFromHGlobal(IntPtr hGlobal) |
|||
{ |
|||
IntPtr source = UnmanagedMethods.GlobalLock(hGlobal); |
|||
try |
|||
{ |
|||
int size = (int)UnmanagedMethods.GlobalSize(hGlobal).ToInt64(); |
|||
byte[] data = new byte[size]; |
|||
Marshal.Copy(source, data, 0, size); |
|||
return data; |
|||
} |
|||
finally |
|||
{ |
|||
UnmanagedMethods.GlobalUnlock(hGlobal); |
|||
} |
|||
} |
|||
|
|||
private IEnumerable<string> GetDataFormatsCore() |
|||
{ |
|||
var enumFormat = _wrapped.EnumFormatEtc(DATADIR.DATADIR_GET); |
|||
if (enumFormat != null) |
|||
{ |
|||
enumFormat.Reset(); |
|||
FORMATETC[] formats = new FORMATETC[1]; |
|||
int[] fetched = { 1 }; |
|||
while (fetched[0] > 0) |
|||
{ |
|||
fetched[0] = 0; |
|||
if (enumFormat.Next(1, formats, fetched) == 0 && fetched[0] > 0) |
|||
{ |
|||
if (formats[0].ptd != IntPtr.Zero) |
|||
Marshal.FreeCoTaskMem(formats[0].ptd); |
|||
|
|||
yield return ClipboardFormats.GetFormat(formats[0].cfFormat); |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,39 @@ |
|||
using System; |
|||
using System.Collections.Generic; |
|||
using System.Linq; |
|||
using Avalonia.Win32.Interop; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
class OleDragSource : IDropSource |
|||
{ |
|||
private const int DRAGDROP_S_USEDEFAULTCURSORS = 0x00040102; |
|||
private const int DRAGDROP_S_DROP = 0x00040100; |
|||
private const int DRAGDROP_S_CANCEL = 0x00040101; |
|||
|
|||
private const int KEYSTATE_LEFTMB = 1; |
|||
private const int KEYSTATE_MIDDLEMB = 16; |
|||
private const int KEYSTATE_RIGHTMB = 2; |
|||
private static readonly int[] MOUSE_BUTTONS = new int[] { KEYSTATE_LEFTMB, KEYSTATE_MIDDLEMB, KEYSTATE_RIGHTMB }; |
|||
|
|||
public int QueryContinueDrag(int fEscapePressed, int grfKeyState) |
|||
{ |
|||
if (fEscapePressed != 0) |
|||
return DRAGDROP_S_CANCEL; |
|||
|
|||
int pressedMouseButtons = MOUSE_BUTTONS.Where(mb => (grfKeyState & mb) == mb).Count(); |
|||
|
|||
if (pressedMouseButtons >= 2) |
|||
return DRAGDROP_S_CANCEL; |
|||
if (pressedMouseButtons == 0) |
|||
return DRAGDROP_S_DROP; |
|||
|
|||
return unchecked((int)UnmanagedMethods.HRESULT.S_OK); |
|||
} |
|||
|
|||
public int GiveFeedback(int dwEffect) |
|||
{ |
|||
return DRAGDROP_S_USEDEFAULTCURSORS; |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,161 @@ |
|||
using Avalonia.Input.DragDrop; |
|||
using Avalonia.Input.DragDrop.Raw; |
|||
using Avalonia.Input; |
|||
using Avalonia.Platform; |
|||
using Avalonia.Win32.Interop; |
|||
using IDataObject = Avalonia.Input.DragDrop.IDataObject; |
|||
using IOleDataObject = System.Runtime.InteropServices.ComTypes.IDataObject; |
|||
|
|||
namespace Avalonia.Win32 |
|||
{ |
|||
class OleDropTarget : IDropTarget |
|||
{ |
|||
private readonly IInputElement _target; |
|||
private readonly ITopLevelImpl _tl; |
|||
private readonly IDragDropDevice _dragDevice; |
|||
|
|||
private IDataObject _currentDrag = null; |
|||
|
|||
public OleDropTarget(ITopLevelImpl tl, IInputElement target) |
|||
{ |
|||
_dragDevice = AvaloniaLocator.Current.GetService<IDragDropDevice>(); |
|||
_tl = tl; |
|||
_target = target; |
|||
} |
|||
|
|||
public static DropEffect ConvertDropEffect(DragDropEffects operation) |
|||
{ |
|||
DropEffect result = DropEffect.None; |
|||
if (operation.HasFlag(DragDropEffects.Copy)) |
|||
result |= DropEffect.Copy; |
|||
if (operation.HasFlag(DragDropEffects.Move)) |
|||
result |= DropEffect.Move; |
|||
if (operation.HasFlag(DragDropEffects.Link)) |
|||
result |= DropEffect.Link; |
|||
return result; |
|||
} |
|||
|
|||
public static DragDropEffects ConvertDropEffect(DropEffect effect) |
|||
{ |
|||
DragDropEffects result = DragDropEffects.None; |
|||
if (effect.HasFlag(DropEffect.Copy)) |
|||
result |= DragDropEffects.Copy; |
|||
if (effect.HasFlag(DropEffect.Move)) |
|||
result |= DragDropEffects.Move; |
|||
if (effect.HasFlag(DropEffect.Link)) |
|||
result |= DragDropEffects.Link; |
|||
return result; |
|||
} |
|||
|
|||
UnmanagedMethods.HRESULT IDropTarget.DragEnter(IOleDataObject pDataObj, int grfKeyState, long pt, ref DropEffect pdwEffect) |
|||
{ |
|||
var dispatch = _tl?.Input; |
|||
if (dispatch == null) |
|||
{ |
|||
pdwEffect = DropEffect.None; |
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
_currentDrag = pDataObj as IDataObject; |
|||
if (_currentDrag == null) |
|||
_currentDrag = new OleDataObject(pDataObj); |
|||
var args = new RawDragEvent( |
|||
_dragDevice, |
|||
RawDragEventType.DragEnter, |
|||
_target, |
|||
GetDragLocation(pt), |
|||
_currentDrag, |
|||
ConvertDropEffect(pdwEffect) |
|||
); |
|||
dispatch(args); |
|||
pdwEffect = ConvertDropEffect(args.Effects); |
|||
|
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
|
|||
UnmanagedMethods.HRESULT IDropTarget.DragOver(int grfKeyState, long pt, ref DropEffect pdwEffect) |
|||
{ |
|||
var dispatch = _tl?.Input; |
|||
if (dispatch == null) |
|||
{ |
|||
pdwEffect = DropEffect.None; |
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
|
|||
var args = new RawDragEvent( |
|||
_dragDevice, |
|||
RawDragEventType.DragOver, |
|||
_target, |
|||
GetDragLocation(pt), |
|||
_currentDrag, |
|||
ConvertDropEffect(pdwEffect) |
|||
); |
|||
dispatch(args); |
|||
pdwEffect = ConvertDropEffect(args.Effects); |
|||
|
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
|
|||
UnmanagedMethods.HRESULT IDropTarget.DragLeave() |
|||
{ |
|||
try |
|||
{ |
|||
_tl?.Input(new RawDragEvent( |
|||
_dragDevice, |
|||
RawDragEventType.DragLeave, |
|||
_target, |
|||
default(Point), |
|||
null, |
|||
DragDropEffects.None |
|||
)); |
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
finally |
|||
{ |
|||
_currentDrag = null; |
|||
} |
|||
} |
|||
|
|||
UnmanagedMethods.HRESULT IDropTarget.Drop(IOleDataObject pDataObj, int grfKeyState, long pt, ref DropEffect pdwEffect) |
|||
{ |
|||
try |
|||
{ |
|||
var dispatch = _tl?.Input; |
|||
if (dispatch == null) |
|||
{ |
|||
pdwEffect = DropEffect.None; |
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
|
|||
_currentDrag = pDataObj as IDataObject; |
|||
if (_currentDrag == null) |
|||
_currentDrag= new OleDataObject(pDataObj); |
|||
|
|||
var args = new RawDragEvent( |
|||
_dragDevice, |
|||
RawDragEventType.Drop, |
|||
_target, |
|||
GetDragLocation(pt), |
|||
_currentDrag, |
|||
ConvertDropEffect(pdwEffect) |
|||
); |
|||
dispatch(args); |
|||
pdwEffect = ConvertDropEffect(args.Effects); |
|||
|
|||
return UnmanagedMethods.HRESULT.S_OK; |
|||
} |
|||
finally |
|||
{ |
|||
_currentDrag = null; |
|||
} |
|||
} |
|||
|
|||
private Point GetDragLocation(long dragPoint) |
|||
{ |
|||
int x = (int)dragPoint; |
|||
int y = (int)(dragPoint >> 32); |
|||
|
|||
Point screenPt = new Point(x, y); |
|||
return _target.PointToClient(screenPt); |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue