private void ZoomBorder_Drop(object sender, DragEventArgs e)
        {
            // Files.
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                try
                {
                    var files = (string[])e.Data.GetData(DataFormats.FileDrop);
                    if (_projectEditor.OnDropFiles(files))
                    {
                        e.Handled = true;
                    }
                }
                catch (Exception ex)
                {
                    _projectEditor?.Log?.LogError($"{ex.Message}{Environment.NewLine}{ex.StackTrace}");
                }
            }

            // Shapes.
            if (e.Data.GetDataPresent(typeof(IBaseShape)))
            {
                try
                {
                    if (e.Data.GetData(typeof(IBaseShape)) is IBaseShape shape)
                    {
                        var p = e.GetPosition(drawableControl);
                        _projectEditor.OnDropShape(shape, p.X, p.Y);
                        e.Handled = true;
                    }
                }
                catch (Exception ex)
                {
                    _projectEditor?.Log?.LogError($"{ex.Message}{Environment.NewLine}{ex.StackTrace}");
                }
            }

            // Groups.
            if (e.Data.GetDataPresent(typeof(IGroupShape)))
            {
                try
                {
                    if (e.Data.GetData(typeof(IGroupShape)) is IGroupShape group)
                    {
                        var p = e.GetPosition(drawableControl);
                        _projectEditor.OnDropShapeAsClone(group, p.X, p.Y);
                        e.Handled = true;
                    }
                }
                catch (Exception ex)
                {
                    _projectEditor?.Log?.LogError($"{ex.Message}{Environment.NewLine}{ex.StackTrace}");
                }
            }

            // Records.
            if (e.Data.GetDataPresent(typeof(IRecord)))
            {
                try
                {
                    if (e.Data.GetData(typeof(IRecord)) is IRecord record)
                    {
                        var p = e.GetPosition(drawableControl);
                        _projectEditor.OnDropRecord(record, p.X, p.Y);
                        e.Handled = true;
                    }
                }
                catch (Exception ex)
                {
                    _projectEditor?.Log?.LogError($"{ex.Message}{Environment.NewLine}{ex.StackTrace}");
                }
            }

            // Styles.
            if (e.Data.GetDataPresent(typeof(IShapeStyle)))
            {
                try
                {
                    if (e.Data.GetData(typeof(IShapeStyle)) is IShapeStyle style)
                    {
                        var p = e.GetPosition(drawableControl);
                        _projectEditor.OnDropStyle(style, p.X, p.Y);
                        e.Handled = true;
                    }
                }
                catch (Exception ex)
                {
                    _projectEditor?.Log?.LogError($"{ex.Message}{Environment.NewLine}{ex.StackTrace}");
                }
            }

            // Templates.
            if (e.Data.GetDataPresent(typeof(IPageContainer)))
            {
                try
                {
                    if (e.Data.GetData(typeof(IPageContainer)) is IPageContainer template)
                    {
                        _projectEditor.OnApplyTemplate(template);
                        e.Handled = true;
                    }
                }
                catch (Exception ex)
                {
                    _projectEditor?.Log?.LogError($"{ex.Message}{Environment.NewLine}{ex.StackTrace}");
                }
            }
        }