protected void OnDragDrop(object sender, DragEventArgs e)
{
Point p = textArea.PointToClient(new Point(e.X, e.Y));
if (e.Data.GetDataPresent(typeof(string)))
{
textArea.BeginUpdate();
textArea.Document.UndoStack.StartUndoGroup();
try {
int offset = textArea.Caret.Offset;
if (textArea.IsReadOnly(offset))
{
return;
}
if (e.Data.GetDataPresent(typeof(DefaultSelection)))
{
ISelection sel = (ISelection)e.Data.GetData(typeof(DefaultSelection));
if (sel.ContainsPosition(textArea.Caret.Position))
{
return;
}
if (GetDragDropEffect(e) == DragDropEffects.Move)
{
if (SelectionManager.SelectionIsReadOnly(textArea.Document, sel))
{
return;
}
int len = sel.Length;
textArea.Document.Remove(sel.Offset, len);
if (sel.Offset < offset)
{
offset -= len;
}
}
}
textArea.SelectionManager.ClearSelection();
InsertString(offset, (string)e.Data.GetData(typeof(string)));
textArea.Document.RequestUpdate(new TextAreaUpdate(TextAreaUpdateType.WholeTextArea));
} finally {
textArea.Document.UndoStack.EndUndoGroup();
textArea.EndUpdate();
}
}
}
void ShowHiddenCursorIfMovedOrLeft()
{
textArea.ShowHiddenCursor(!textArea.Focused ||
!textArea.ClientRectangle.Contains(textArea.PointToClient(Cursor.Position)));
}