public bool Run (OpenFileDialogData data)
		{
			NSSavePanel panel = null;
			
			try {
				bool directoryMode = data.Action != Gtk.FileChooserAction.Open
					&& data.Action != Gtk.FileChooserAction.Save;
				
				if (data.Action == Gtk.FileChooserAction.Save) {
					panel = new NSSavePanel ();
				} else {
					panel = new NSOpenPanel () {
						CanChooseDirectories = directoryMode,
						CanChooseFiles = !directoryMode,
					};
				}
				
				MacSelectFileDialogHandler.SetCommonPanelProperties (data, panel);
				
				SelectEncodingPopUpButton encodingSelector = null;
				NSPopUpButton viewerSelector = null;
				NSButton closeSolutionButton = null;
				
				var box = new MDBox (LayoutDirection.Vertical, 2, 2);
				
				List<FileViewer> currentViewers = null;
				List<MDAlignment> labels = new List<MDAlignment> ();
				
				if (!directoryMode) {
					var filterPopup = MacSelectFileDialogHandler.CreateFileFilterPopup (data, panel);
					
					var filterLabel = new MDAlignment (new MDLabel (GettextCatalog.GetString ("Show files:")), true);
					var filterBox = new MDBox (LayoutDirection.Horizontal, 2, 0) {
						{ filterLabel },
						{ new MDAlignment (filterPopup, true) { MinWidth = 200 } }
					};
					labels.Add (filterLabel);
					box.Add (filterBox);
					
					if (data.ShowEncodingSelector) {
						encodingSelector = new SelectEncodingPopUpButton (data.Action != Gtk.FileChooserAction.Save);
						encodingSelector.SelectedEncodingId = data.Encoding;
						
						var encodingLabel = new MDAlignment (new MDLabel (GettextCatalog.GetString ("Encoding:")), true);
						var encodingBox = new MDBox (LayoutDirection.Horizontal, 2, 0) {
							{ encodingLabel },
							{ new MDAlignment (encodingSelector, true) { MinWidth = 200 }  }
						};
						labels.Add (encodingLabel);
						box.Add (encodingBox);
					}
					
					if (data.ShowViewerSelector && panel is NSOpenPanel) {
						currentViewers = new List<FileViewer> ();
						viewerSelector = new NSPopUpButton () {
							Enabled = false,
						};
						
						if (encodingSelector != null) {
							viewerSelector.Activated += delegate {
								var idx = viewerSelector.IndexOfSelectedItem;
								encodingSelector.Enabled = ! (idx == 0 && currentViewers[0] == null);
							};
						}
						
						var viewSelLabel = new MDLabel (GettextCatalog.GetString ("Open with:"));
						var viewSelBox = new MDBox (LayoutDirection.Horizontal, 2, 0) {
							{ viewSelLabel, true },
							{ new MDAlignment (viewerSelector, true) { MinWidth = 200 }  }
						};
						
						if (IdeApp.Workspace.IsOpen) {
							closeSolutionButton = new NSButton () {
								Title = GettextCatalog.GetString ("Close current workspace"),
								Hidden = true,
								State = NSCellStateValue.On,
							};
							
							closeSolutionButton.SetButtonType (NSButtonType.Switch);
							closeSolutionButton.SizeToFit ();
							
							viewSelBox.Add (closeSolutionButton, true);
						}
						
						box.Add (viewSelBox);
					}
				}
				
				if (labels.Count > 0) {
					float w = labels.Max (l => l.MinWidth);
					foreach (var l in labels) {
						l.MinWidth = w;
						l.XAlign = LayoutAlign.Begin;
					}
				}
				
				if (box.Count > 0) {
					box.Layout ();
					panel.AccessoryView = box.View;
					box.Layout (box.View.Superview.Frame.Size);
				}
				
				panel.SelectionDidChange += delegate(object sender, EventArgs e) {
					var selection = MacSelectFileDialogHandler.GetSelectedFiles (panel);
					bool slnViewerSelected = false;
					if (viewerSelector != null) {
						FillViewers (currentViewers, viewerSelector, selection);
						if (currentViewers.Count == 0 || currentViewers[0] != null) {
							if (closeSolutionButton != null)
								closeSolutionButton.Hidden = true;
							slnViewerSelected = false;
						} else {
							if (closeSolutionButton != null)
								closeSolutionButton.Hidden = false;
							slnViewerSelected = true;
						}
						box.Layout (box.View.Superview.Frame.Size);
					} 
					if (encodingSelector != null)
						encodingSelector.Enabled = !slnViewerSelected;
				};
				
				try {
					var action = MacSelectFileDialogHandler.RunPanel (data, panel);
					if (!action) {
						GtkQuartz.FocusWindow (data.TransientFor ?? MessageService.RootWindow);
						return false;
					}
				} catch (Exception ex) {
					System.Console.WriteLine (ex);
					throw;
				}
				
				data.SelectedFiles = MacSelectFileDialogHandler.GetSelectedFiles (panel);
				
				if (encodingSelector != null)
					data.Encoding = encodingSelector.SelectedEncodingId;
				
				if (viewerSelector != null ) {
					if (closeSolutionButton != null)
						data.CloseCurrentWorkspace = closeSolutionButton.State != NSCellStateValue.Off;
					data.SelectedViewer = currentViewers[viewerSelector.IndexOfSelectedItem];
				}
				
				GtkQuartz.FocusWindow (data.TransientFor ?? MessageService.RootWindow);
				return true;
			} finally {
				if (panel != null)
					panel.Dispose ();
			}
		}
        public bool Run(OpenFileDialogData data)
        {
            NSSavePanel panel = null;

            try {
                bool directoryMode = data.Action != Gtk.FileChooserAction.Open &&
                                     data.Action != Gtk.FileChooserAction.Save;

                if (data.Action == Gtk.FileChooserAction.Save)
                {
                    panel = new NSSavePanel();
                }
                else
                {
                    panel = new NSOpenPanel()
                    {
                        CanChooseDirectories = directoryMode,
                        CanChooseFiles       = !directoryMode,
                    };
                }

                MacSelectFileDialogHandler.SetCommonPanelProperties(data, panel);

                SelectEncodingPopUpButton encodingSelector = null;
                NSPopUpButton             viewerSelector   = null;
                NSButton closeSolutionButton = null;

                var box = new MDBox(LayoutDirection.Vertical, 2, 2);

                List <FileViewer>  currentViewers = null;
                List <MDAlignment> labels         = new List <MDAlignment> ();

                if (!directoryMode)
                {
                    var filterPopup = MacSelectFileDialogHandler.CreateFileFilterPopup(data, panel);

                    var filterLabel = new MDAlignment(new MDLabel(GettextCatalog.GetString("Show files:")), true);
                    var filterBox   = new MDBox(LayoutDirection.Horizontal, 2, 0)
                    {
                        { filterLabel },
                        { new MDAlignment(filterPopup, true)
                          {
                              MinWidth = 200
                          } }
                    };
                    labels.Add(filterLabel);
                    box.Add(filterBox);

                    if (data.ShowEncodingSelector)
                    {
                        encodingSelector = new SelectEncodingPopUpButton(data.Action != Gtk.FileChooserAction.Save);
                        encodingSelector.SelectedEncodingId = data.Encoding;

                        var encodingLabel = new MDAlignment(new MDLabel(GettextCatalog.GetString("Encoding:")), true);
                        var encodingBox   = new MDBox(LayoutDirection.Horizontal, 2, 0)
                        {
                            { encodingLabel },
                            { new MDAlignment(encodingSelector, true)
                              {
                                  MinWidth = 200
                              } }
                        };
                        labels.Add(encodingLabel);
                        box.Add(encodingBox);
                    }

                    if (data.ShowViewerSelector && panel is NSOpenPanel)
                    {
                        currentViewers = new List <FileViewer> ();
                        viewerSelector = new NSPopUpButton()
                        {
                            Enabled = false,
                        };

                        if (encodingSelector != null)
                        {
                            viewerSelector.Activated += delegate {
                                var idx = viewerSelector.IndexOfSelectedItem;
                                encodingSelector.Enabled = !(idx == 0 && currentViewers[0] == null);
                            };
                        }

                        var viewSelLabel = new MDLabel(GettextCatalog.GetString("Open with:"));
                        var viewSelBox   = new MDBox(LayoutDirection.Horizontal, 2, 0)
                        {
                            { viewSelLabel, true },
                            { new MDAlignment(viewerSelector, true)
                              {
                                  MinWidth = 200
                              } }
                        };

                        if (IdeApp.Workspace.IsOpen)
                        {
                            closeSolutionButton = new NSButton()
                            {
                                Title  = GettextCatalog.GetString("Close current workspace"),
                                Hidden = true,
                                State  = NSCellStateValue.On,
                            };

                            closeSolutionButton.SetButtonType(NSButtonType.Switch);
                            closeSolutionButton.SizeToFit();

                            viewSelBox.Add(closeSolutionButton, true);
                        }

                        box.Add(viewSelBox);
                    }
                }

                if (labels.Count > 0)
                {
                    float w = labels.Max(l => l.MinWidth);
                    foreach (var l in labels)
                    {
                        l.MinWidth = w;
                        l.XAlign   = LayoutAlign.Begin;
                    }
                }

                if (box.Count > 0)
                {
                    box.Layout();
                    panel.AccessoryView = box.View;
                    box.Layout(box.View.Superview.Frame.Size);
                }

                panel.SelectionDidChange += delegate(object sender, EventArgs e) {
                    var  selection         = MacSelectFileDialogHandler.GetSelectedFiles(panel);
                    bool slnViewerSelected = false;
                    if (viewerSelector != null)
                    {
                        FillViewers(currentViewers, viewerSelector, selection);
                        if (currentViewers.Count == 0 || currentViewers[0] != null)
                        {
                            if (closeSolutionButton != null)
                            {
                                closeSolutionButton.Hidden = true;
                            }
                            slnViewerSelected = false;
                        }
                        else
                        {
                            if (closeSolutionButton != null)
                            {
                                closeSolutionButton.Hidden = false;
                            }
                            slnViewerSelected = true;
                        }
                        box.Layout(box.View.Superview.Frame.Size);
                    }
                    if (encodingSelector != null)
                    {
                        encodingSelector.Enabled = !slnViewerSelected;
                    }
                };

                try {
                    var action = MacSelectFileDialogHandler.RunPanel(data, panel);
                    if (!action)
                    {
                        GtkQuartz.FocusWindow(data.TransientFor ?? MessageService.RootWindow);
                        return(false);
                    }
                } catch (Exception ex) {
                    System.Console.WriteLine(ex);
                    throw;
                }

                data.SelectedFiles = MacSelectFileDialogHandler.GetSelectedFiles(panel);

                if (encodingSelector != null)
                {
                    data.Encoding = encodingSelector.SelectedEncodingId;
                }

                if (viewerSelector != null)
                {
                    if (closeSolutionButton != null)
                    {
                        data.CloseCurrentWorkspace = closeSolutionButton.State != NSCellStateValue.Off;
                    }
                    data.SelectedViewer = currentViewers[viewerSelector.IndexOfSelectedItem];
                }

                GtkQuartz.FocusWindow(data.TransientFor ?? MessageService.RootWindow);
                return(true);
            } finally {
                if (panel != null)
                {
                    panel.Dispose();
                }
            }
        }