private void Initialize(IReadOnlyList <ShellObject> items)
{
var pidls = items.Select(item => ShellContextMenuNativeMethods.ILFindLastID(item.PIDL)).ToArray();
var parent = (ShellContainer)items.Select(item => item.Parent).DistinctByIEquatable().Single();
parent.NativeShellFolder.GetUIObjectOf(IntPtr.Zero, (uint)pidls.Length, pidls, typeof(IContextMenu).GUID, 0, out var result);
_contextMenu = (IContextMenu)Marshal.GetTypedObjectForIUnknown(result, typeof(IContextMenu));
_messageHandler = new ShellContextMenuMessageHandler(_contextMenu);
}
public void ShowIn(UIElement element)
{
var point = element.PointToScreen(Mouse.GetPosition(element));
var popupMenu = ShellContextMenuNativeMethods.CreatePopupMenu();
_contextMenu.QueryContextMenu(popupMenu, 0, CmdFirst, CmdLast, CMF.EXPLORE);
int command = ShellContextMenuNativeMethods.TrackPopupMenuEx(popupMenu, TPM.TPM_RETURNCMD, (int)point.X, (int)point.Y, _messageHandler.Handle, IntPtr.Zero);
if (command > 0)
{
_messageHandler.InvokeCommand(command - CmdFirst);
}
}
