public void StartNativeDrag(CoreDragInfo info)
=> CoreDispatcher.Main.RunAsync(CoreDispatcherPriority.High, async() =>
{
try
{
var sourceEvent = new NSEvent();
var source = new NSDraggingSource2();
source.DraggingSessionEndedAction =
(NSImage image, CGPoint screenPoint, NSDragOperation operation) =>
{
// The drop was completed externally
_manager.ProcessDropped(new DragEventSource(info.SourceId, _window));
return;
};
if (_window.ContentView != null)
{
_window.ContentView.BeginDraggingSession(
await DataPackage.CreateNativeDragDropData(info.Data, info.GetPosition(null)),
sourceEvent,
source);
}
else
{
this.Log().Error("Failed to start native Drag and Drop (Window.ContentView is null)");
}
}
catch (Exception e)
{
this.Log().Error("Failed to start native Drag and Drop.", e);
}
});
private NSDragOperation OnDraggingEnteredEvent(NSDraggingInfo draggingInfo)
{
var source = new DragEventSource(_fakePointerId, draggingInfo, _window);
var data = DataPackage.CreateFromNativeDragDropData(draggingInfo);
var allowedOperations = DataPackageOperation.Copy; // Should match with return value
var info = new CoreDragInfo(source, data, allowedOperations);
CoreDragDropManager.GetForCurrentView()?.DragStarted(info);
// Note: No need to _manager.ProcessMove, the DragStarted will actually have the same effect
// To allow the macOS drag to continue, we must assume drop is supported here.
// This will immediately be updated within the OnDraggingUpdated method.
return(NSDragOperation.Copy);
}
void IDragDropExtension.StartNativeDrag(CoreDragInfo info)
{
// There is no way to programmatically initiate a DragAndDrop in browsers.
// We instead have to rely on the native drag and drop support.
}
