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(AddFileDialogData data)
        {
            using (var panel = new NSOpenPanel()
            {
                CanChooseDirectories = false,
                CanChooseFiles = true,
            }) {
                MacSelectFileDialogHandler.SetCommonPanelProperties(data, panel);

                var popup       = new NSPopUpButton(new RectangleF(0, 0, 200, 28), false);
                var dropdownBox = new MDBox(LayoutDirection.Horizontal, 2, 0)
                {
                    { new MDLabel(GettextCatalog.GetString("Override build action:")), true },
                    { new MDAlignment(popup, true)
                      {
                          MinWidth = 200
                      } }
                };

                var filterPopup = MacSelectFileDialogHandler.CreateFileFilterPopup(data, panel);
                if (filterPopup != null)
                {
                    dropdownBox.Layout();
                    var box = new MDBox(LayoutDirection.Vertical, 2, 2)
                    {
                        dropdownBox.View,
                        filterPopup,
                    };
                    box.Layout();
                    panel.AccessoryView = box.View;
                    box.Layout(box.View.Superview.Frame.Size);
                }
                else
                {
                    dropdownBox.Layout();
                    panel.AccessoryView = dropdownBox.View;
                }

                popup.AddItem(GettextCatalog.GetString("(Default)"));
                popup.Menu.AddItem(NSMenuItem.SeparatorItem);

                foreach (var b in data.BuildActions)
                {
                    if (b == "--")
                    {
                        popup.Menu.AddItem(NSMenuItem.SeparatorItem);
                    }
                    else
                    {
                        popup.AddItem(b);
                    }
                }

                var action = MacSelectFileDialogHandler.RunPanel(data, panel);
                if (!action)
                {
                    GtkQuartz.FocusWindow(data.TransientFor ?? MessageService.RootWindow);
                    return(false);
                }

                data.SelectedFiles = MacSelectFileDialogHandler.GetSelectedFiles(panel);

                var idx = popup.IndexOfSelectedItem - 2;
                if (idx >= 0)
                {
                    data.OverrideAction = data.BuildActions[idx];
                }

                GtkQuartz.FocusWindow(data.TransientFor ?? MessageService.RootWindow);
                return(true);
            }
        }