private void InitializeToolbar(ToolbarDefinition toolbarDefinition) { viewerToolbar.Items.Clear(); foreach (var item in toolbarDefinition.Items) { viewerToolbar.Items.Add(CreateToolbarItem(item)); } if (_loader == null) { _loader = new ToolStripLabel(Properties.Resources.icon_loading); _loader.Alignment = ToolStripItemAlignment.Right; _loader.Text = string.Empty; _loader.ImageScaling = ToolStripItemImageScaling.None; } viewerToolbar.Items.Add(_loader); _loader.Visible = mapViewer.IsBusy; }