public DragEventSource(long pointerId, NSDraggingInfo draggingInfo, NSWindow window)
{
Id = pointerId;
_macOSDraggingInfo = draggingInfo;
_window = window;
}
[Export("performDragOperation:")] // Do not remove
internal virtual bool PerformDragOperation(NSDraggingInfo draggingInfo)
{
try
{
return(PerformDragOperationAction.Invoke(draggingInfo));
}
catch
{
return(false);
}
}
[Export("draggingUpdated:")] // Do not remove
internal virtual NSDragOperation DraggingUpdated(NSDraggingInfo draggingInfo)
{
try
{
return(DraggingUpdatedAction.Invoke(draggingInfo));
}
catch
{
return(NSDragOperation.None);
}
}
[Export("draggingExited:")] // Do not remove
internal virtual void DraggingExited(NSDraggingInfo draggingInfo)
{
try
{
DraggingExitedAction.Invoke(draggingInfo);
}
catch
{
// Simply return if an error occurred, it is unrecoverable
}
return;
}
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);
}
private void OnDraggingEnded(NSDraggingInfo draggingInfo)
{
return;
}
private bool OnPerformDragOperation(NSDraggingInfo draggingInfo)
{
var operation = _manager.ProcessDropped(new DragEventSource(_fakePointerId, draggingInfo, _window));
return(operation != DataPackageOperation.None);
}
private void OnDraggingExited(NSDraggingInfo draggingInfo)
{
_ = _manager.ProcessAborted(new DragEventSource(_fakePointerId, draggingInfo, _window));
return;
}
private NSDragOperation OnDraggingUpdated(NSDraggingInfo draggingInfo)
{
var operation = _manager.ProcessMoved(new DragEventSource(_fakePointerId, draggingInfo, _window));
return(ToNSDragOperation(operation));
}
[Export("prepareForDragOperation:")] // Do not remove
internal virtual bool PrepareForDragOperation(NSDraggingInfo draggingInfo)
{
// Always return true as UWP doesn't really have an equivalent step.
// Drop is accepted within DraggingEntered (drag entered event in UWP).
return(true);
}
internal static DataPackageView CreateFromNativeDragDropData(NSDraggingInfo draggingInfo)
{
return(GetFromNative(draggingInfo.DraggingPasteboard));
}