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),
ConvertKeyState(grfKeyState)
);
dispatch(args);
pdwEffect = ConvertDropEffect(args.Effects);
return(UnmanagedMethods.HRESULT.S_OK);
}
public AvnDragDropEffects DragEvent(AvnDragEventType type, AvnPoint position,
AvnInputModifiers modifiers,
AvnDragDropEffects effects,
IAvnClipboard clipboard, IntPtr dataObjectHandle)
{
var device = AvaloniaLocator.Current.GetService <IDragDropDevice>();
IDataObject dataObject = null;
if (dataObjectHandle != IntPtr.Zero)
{
dataObject = GCHandle.FromIntPtr(dataObjectHandle).Target as IDataObject;
}
using (var clipboardDataObject = new ClipboardDataObject(clipboard))
{
if (dataObject == null)
{
dataObject = clipboardDataObject;
}
var args = new RawDragEvent(device, (RawDragEventType)type,
_parent._inputRoot, position.ToAvaloniaPoint(), dataObject, (DragDropEffects)effects,
(RawInputModifiers)modifiers);
_parent.Input(args);
return((AvnDragDropEffects)args.Effects);
}
}
unsafe void Win32Com.IDropTarget.Drop(Win32Com.IDataObject pDataObj, int grfKeyState, UnmanagedMethods.POINT pt, DropEffect *pdwEffect)
{
try
{
var dispatch = _tl?.Input;
if (dispatch == null)
{
*pdwEffect = (int)DropEffect.None;
}
SetDataObject(pDataObj);
var args = new RawDragEvent(
_dragDevice,
RawDragEventType.Drop,
_target,
GetDragLocation(pt),
_currentDrag,
ConvertDropEffect(*pdwEffect),
ConvertKeyState(grfKeyState)
);
dispatch(args);
*pdwEffect = ConvertDropEffect(args.Effects);
}
finally
{
ReleaseDataObject();
}
}
private DragDropEffects RaiseEventAndUpdateCursor(RawDragEventType type, IInputRoot root, Point pt, RawInputModifiers modifiers)
{
_lastPosition = pt;
RawDragEvent rawEvent = new RawDragEvent(_dragDrop, type, root, pt, _draggedData, _allowedEffects, modifiers);
var tl = root.GetSelfAndVisualAncestors().OfType <TopLevel>().FirstOrDefault();
tl.PlatformImpl?.Input(rawEvent);
var effect = GetPreferredEffect(rawEvent.Effects & _allowedEffects, modifiers);
UpdateCursor(root, effect);
return(effect);
}
private NSDragOperation SendRawDragEvent(NSDraggingInfo sender, RawDragEventType type)
{
Action <RawInputEventArgs> input = _tl.Input;
IDragDropDevice dragDevice = _tl._dragDevice;
IInputRoot root = _tl?.InputRoot;
if (root == null || dragDevice == null || input == null)
{
return(NSDragOperation.None);
}
var dragOp = DraggingInfo.ConvertDragOperation(sender.DraggingSourceOperationMask);
DraggingInfo info = new DraggingInfo(sender);
var pt = TranslateLocalPoint(info.Location);
var args = new RawDragEvent(dragDevice, type, root, pt, info, dragOp);
input(args);
return(DraggingInfo.ConvertDragOperation(args.Effects));
}
private void ProcessRawEvent(RawDragEvent e)
{
switch (e.Type)
{
case RawDragEventType.DragEnter:
e.Effects = DragEnter(e.InputRoot, e.Location, e.Data, e.Effects);
break;
case RawDragEventType.DragOver:
e.Effects = DragOver(e.InputRoot, e.Location, e.Data, e.Effects);
break;
case RawDragEventType.DragLeave:
DragLeave(e.InputRoot);
break;
case RawDragEventType.Drop:
e.Effects = Drop(e.InputRoot, e.Location, e.Data, e.Effects);
break;
}
}
unsafe void Win32Com.IDropTarget.DragOver(int grfKeyState, UnmanagedMethods.POINT pt, DropEffect *pdwEffect)
{
var dispatch = _tl?.Input;
if (dispatch == null)
{
*pdwEffect = (int)DropEffect.None;
}
var args = new RawDragEvent(
_dragDevice,
RawDragEventType.DragOver,
_target,
GetDragLocation(pt),
_currentDrag,
ConvertDropEffect(*pdwEffect),
ConvertKeyState(grfKeyState)
);
dispatch(args);
*pdwEffect = ConvertDropEffect(args.Effects);
}