Benedikt Stebner
6 years ago
committed by
GitHub
GitHub
31 changed files with 1233 additions and 806 deletions
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#include "common.h" |
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extern AvnDragDropEffects ConvertDragDropEffects(NSDragOperation nsop) |
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{ |
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int effects = 0; |
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if((nsop & NSDragOperationCopy) != 0) |
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effects |= (int)AvnDragDropEffects::Copy; |
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if((nsop & NSDragOperationMove) != 0) |
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effects |= (int)AvnDragDropEffects::Move; |
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if((nsop & NSDragOperationLink) != 0) |
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effects |= (int)AvnDragDropEffects::Link; |
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return (AvnDragDropEffects)effects; |
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}; |
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extern NSString* GetAvnCustomDataType() |
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{ |
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char buffer[256]; |
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sprintf(buffer, "net.avaloniaui.inproc.uti.n%in", getpid()); |
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return [NSString stringWithUTF8String:buffer]; |
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} |
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@interface AvnDndSource : NSObject<NSDraggingSource> |
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@end |
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@implementation AvnDndSource |
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{ |
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NSDragOperation _operation; |
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ComPtr<IAvnDndResultCallback> _cb; |
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void* _sourceHandle; |
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}; |
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- (NSDragOperation)draggingSession:(nonnull NSDraggingSession *)session sourceOperationMaskForDraggingContext:(NSDraggingContext)context |
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{ |
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return NSDragOperationCopy; |
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} |
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- (AvnDndSource*) initWithOperation: (NSDragOperation)operation |
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andCallback: (IAvnDndResultCallback*) cb |
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andSourceHandle: (void*) handle |
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{ |
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self = [super init]; |
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_operation = operation; |
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_cb = cb; |
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_sourceHandle = handle; |
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return self; |
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} |
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- (void)draggingSession:(NSDraggingSession *)session |
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endedAtPoint:(NSPoint)screenPoint |
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operation:(NSDragOperation)operation |
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{ |
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if(_cb != nil) |
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{ |
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auto cb = _cb; |
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_cb = nil; |
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cb->OnDragAndDropComplete(ConvertDragDropEffects(operation)); |
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} |
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if(_sourceHandle != nil) |
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{ |
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FreeAvnGCHandle(_sourceHandle); |
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_sourceHandle = nil; |
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} |
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} |
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- (void*) gcHandle |
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{ |
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return _sourceHandle; |
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} |
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@end |
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extern NSObject<NSDraggingSource>* CreateDraggingSource(NSDragOperation op, IAvnDndResultCallback* cb, void* handle) |
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{ |
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return [[AvnDndSource alloc] initWithOperation:op andCallback:cb andSourceHandle:handle]; |
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}; |
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extern void* GetAvnDataObjectHandleFromDraggingInfo(NSObject<NSDraggingInfo>* info) |
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{ |
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id obj = [info draggingSource]; |
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if(obj == nil) |
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return nil; |
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if([obj isKindOfClass: [AvnDndSource class]]) |
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{ |
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auto src = (AvnDndSource*)obj; |
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return [src gcHandle]; |
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} |
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return nil; |
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} |
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@ -0,0 +1,115 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Collections.ObjectModel; |
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using System.Linq; |
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using System.Reactive; |
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using Avalonia.Controls; |
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using ReactiveUI; |
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namespace ControlCatalog.ViewModels |
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{ |
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public class TreeViewPageViewModel : ReactiveObject |
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{ |
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private readonly Node _root; |
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private SelectionMode _selectionMode; |
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public TreeViewPageViewModel() |
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{ |
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_root = new Node(); |
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Items = _root.Children; |
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Selection = new SelectionModel(); |
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Selection.SelectionChanged += SelectionChanged; |
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AddItemCommand = ReactiveCommand.Create(AddItem); |
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RemoveItemCommand = ReactiveCommand.Create(RemoveItem); |
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} |
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public ObservableCollection<Node> Items { get; } |
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public SelectionModel Selection { get; } |
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public ReactiveCommand<Unit, Unit> AddItemCommand { get; } |
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public ReactiveCommand<Unit, Unit> RemoveItemCommand { get; } |
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public SelectionMode SelectionMode |
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{ |
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get => _selectionMode; |
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set |
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{ |
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Selection.ClearSelection(); |
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this.RaiseAndSetIfChanged(ref _selectionMode, value); |
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} |
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} |
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private void AddItem() |
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{ |
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var parentItem = Selection.SelectedItems.Count > 0 ? (Node)Selection.SelectedItems[0] : _root; |
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parentItem.AddItem(); |
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} |
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private void RemoveItem() |
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{ |
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while (Selection.SelectedItems.Count > 0) |
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{ |
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Node lastItem = (Node)Selection.SelectedItems[0]; |
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RecursiveRemove(Items, lastItem); |
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Selection.DeselectAt(Selection.SelectedIndices[0]); |
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} |
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bool RecursiveRemove(ObservableCollection<Node> items, Node selectedItem) |
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{ |
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if (items.Remove(selectedItem)) |
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{ |
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return true; |
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} |
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foreach (Node item in items) |
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{ |
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if (item.AreChildrenInitialized && RecursiveRemove(item.Children, selectedItem)) |
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{ |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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private void SelectionChanged(object sender, SelectionModelSelectionChangedEventArgs e) |
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{ |
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var selected = string.Join(",", e.SelectedIndices); |
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var deselected = string.Join(",", e.DeselectedIndices); |
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System.Diagnostics.Debug.WriteLine($"Selected '{selected}', Deselected '{deselected}'"); |
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} |
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public class Node |
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{ |
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private ObservableCollection<Node> _children; |
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private int _childIndex = 10; |
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public Node() |
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{ |
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Header = "Item"; |
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} |
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public Node(Node parent, int index) |
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{ |
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Parent = parent; |
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Header = parent.Header + ' ' + index; |
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} |
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public Node Parent { get; } |
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public string Header { get; } |
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public bool AreChildrenInitialized => _children != null; |
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public ObservableCollection<Node> Children => _children ??= CreateChildren(); |
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public void AddItem() => Children.Add(new Node(this, _childIndex++)); |
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public void RemoveItem(Node child) => Children.Remove(child); |
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public override string ToString() => Header; |
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private ObservableCollection<Node> CreateChildren() |
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{ |
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return new ObservableCollection<Node>( |
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Enumerable.Range(0, 10).Select(i => new Node(this, i))); |
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} |
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} |
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} |
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} |
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@ -0,0 +1,76 @@ |
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using System; |
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using System.Runtime.InteropServices; |
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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.Platform; |
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using Avalonia.Interactivity; |
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using Avalonia.Native.Interop; |
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using Avalonia.Platform; |
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using Avalonia.VisualTree; |
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namespace Avalonia.Native |
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{ |
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class AvaloniaNativeDragSource : IPlatformDragSource |
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{ |
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private readonly IAvaloniaNativeFactory _factory; |
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public AvaloniaNativeDragSource(IAvaloniaNativeFactory factory) |
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{ |
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_factory = factory; |
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} |
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TopLevel FindRoot(IInteractive interactive) |
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{ |
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while (interactive != null && !(interactive is IVisual)) |
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interactive = interactive.InteractiveParent; |
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if (interactive == null) |
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return null; |
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var visual = (IVisual)interactive; |
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return visual.VisualRoot as TopLevel; |
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} |
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class DndCallback : CallbackBase, IAvnDndResultCallback |
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{ |
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private TaskCompletionSource<DragDropEffects> _tcs; |
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public DndCallback(TaskCompletionSource<DragDropEffects> tcs) |
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{ |
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_tcs = tcs; |
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} |
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public void OnDragAndDropComplete(AvnDragDropEffects effect) |
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{ |
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_tcs?.TrySetResult((DragDropEffects)effect); |
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_tcs = null; |
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} |
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} |
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public Task<DragDropEffects> DoDragDrop(PointerEventArgs triggerEvent, IDataObject data, DragDropEffects allowedEffects) |
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{ |
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// Sanity check
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var tl = FindRoot(triggerEvent.Source); |
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var view = tl?.PlatformImpl as WindowBaseImpl; |
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if (view == null) |
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throw new ArgumentException(); |
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triggerEvent.Pointer.Capture(null); |
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var tcs = new TaskCompletionSource<DragDropEffects>(); |
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var clipboardImpl = _factory.CreateDndClipboard(); |
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using (var clipboard = new ClipboardImpl(clipboardImpl)) |
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using (var cb = new DndCallback(tcs)) |
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{ |
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if (data.Contains(DataFormats.Text)) |
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// API is synchronous, so it's OK
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clipboard.SetTextAsync(data.GetText()).Wait(); |
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view.BeginDraggingSession((AvnDragDropEffects)allowedEffects, |
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triggerEvent.GetPosition(tl).ToAvnPoint(), clipboardImpl, cb, |
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GCHandle.ToIntPtr(GCHandle.Alloc(data))); |
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} |
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return tcs.Task; |
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} |
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} |
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} |
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@ -0,0 +1,39 @@ |
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using System.Runtime.InteropServices; |
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namespace Avalonia.Native.Interop |
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{ |
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unsafe partial class IAvnString |
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{ |
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private string _managed; |
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public string String |
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{ |
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get |
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{ |
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if (_managed == null) |
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{ |
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var ptr = Pointer(); |
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if (ptr == null) |
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return null; |
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_managed = System.Text.Encoding.UTF8.GetString((byte*)ptr.ToPointer(), Length()); |
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} |
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return _managed; |
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} |
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} |
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public override string ToString() => String; |
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} |
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partial class IAvnStringArray |
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{ |
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public string[] ToStringArray() |
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{ |
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var arr = new string[Count]; |
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for(uint c = 0; c<arr.Length;c++) |
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using (var s = Get(c)) |
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arr[c] = s.String; |
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return arr; |
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} |
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} |
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} |
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