session_dialog.cc

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/*
    Copyright (C) 2013 Paul Davis

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifdef WAF_BUILD
#include "gtk2ardour-config.h"
#endif

#include <fstream>
#include <algorithm>

#include <gtkmm/filechooser.h>

#include "pbd/failed_constructor.h"
#include "pbd/file_utils.h"
#include "pbd/replace_all.h"
#include "pbd/whitespace.h"
#include "pbd/stacktrace.h"
#include "pbd/stl_delete.h"
#include "pbd/openuri.h"

#include "ardour/audioengine.h"
#include "ardour/filesystem_paths.h"
#include "ardour/recent_sessions.h"
#include "ardour/session.h"
#include "ardour/session_state_utils.h"
#include "ardour/template_utils.h"
#include "ardour/filename_extensions.h"

#include "ardour_ui.h"
#include "session_dialog.h"
#include "opts.h"
#include "engine_dialog.h"
#include "i18n.h"
#include "utils.h"

using namespace std;
using namespace Gtk;
using namespace Gdk;
using namespace Glib;
using namespace PBD;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;

SessionDialog::SessionDialog (bool require_new, const std::string& session_name, const std::string& session_path, const std::string& template_name, bool cancel_not_quit)
        : ArdourDialog (_("Session Setup"), true, true)
        , new_only (require_new)
        , _provided_session_name (session_name)
        , _provided_session_path (session_path)
        , new_folder_chooser (FILE_CHOOSER_ACTION_SELECT_FOLDER)
        , more_new_session_options_button (_("Advanced options ..."))
        , _output_limit_count_adj (1, 0, 100, 1, 10, 0)
        , _input_limit_count_adj (1, 0, 100, 1, 10, 0)
        , _master_bus_channel_count_adj (2, 0, 100, 1, 10, 0)
        , _existing_session_chooser_used (false)
{
        set_position (WIN_POS_CENTER);
        get_vbox()->set_spacing (6);

        cancel_button = add_button ((cancel_not_quit ? Stock::CANCEL : Stock::QUIT), RESPONSE_CANCEL);
        back_button = add_button (Stock::GO_BACK, RESPONSE_NO);
        open_button = add_button (Stock::OPEN, RESPONSE_ACCEPT);

        back_button->signal_button_press_event().connect (sigc::mem_fun (*this, &SessionDialog::back_button_pressed), false);

        open_button->set_sensitive (false);
        back_button->set_sensitive (false);

        /* this is where announcements will be displayed, but it may be empty
         * and invisible most of the time.
         */

        info_frame.set_shadow_type(SHADOW_ETCHED_OUT);
        info_frame.set_no_show_all (true);
        info_frame.set_border_width (12);
        get_vbox()->pack_start (info_frame, false, false);

        setup_new_session_page ();
        
        if (!new_only) {
                setup_initial_choice_box ();
                get_vbox()->pack_start (ic_vbox, true, true);
        } else {
                get_vbox()->pack_start (session_new_vbox, true, true);
        }
        
        if (!template_name.empty()) {
                use_template_button.set_active (false);
                load_template_override = template_name;
        }
        
        get_vbox()->show_all ();

        /* fill data models and show/hide accordingly */

        populate_session_templates ();

        if (!template_model->children().empty()) {
                use_template_button.show();
                template_chooser.show ();
        } else {
                use_template_button.hide();
                template_chooser.hide ();
        }

        if (recent_session_model) {
                int cnt = redisplay_recent_sessions ();
                if (cnt > 0) {
                        recent_scroller.show();
                        recent_label.show ();
                        
                        if (cnt > 4) {
                                recent_scroller.set_size_request (-1, 300);
                        }
                } else {
                        recent_scroller.hide();
                        recent_label.hide ();
                }
        }

        /* possibly get out of here immediately if everything is ready to go.
           We still need to set up the whole dialog because of the way
           ARDOUR_UI::get_session_parameters() might skip it on a first
           pass then require it for a second pass (e.g. when there
           is an error with session loading and we have to ask the user
           what to do next).
         */

        if (!session_name.empty() && !require_new) {
                response (RESPONSE_OK);
                return;
        }
}

SessionDialog::~SessionDialog()
{
}

void
SessionDialog::clear_given ()
{
        _provided_session_path = "";
        _provided_session_name = "";
}

bool
SessionDialog::use_session_template ()
{
        if (!load_template_override.empty()) {
                return true;
        }

        if (use_template_button.get_active()) {
                return true;
        }

        return false;
}

std::string
SessionDialog::session_template_name ()
{
        if (!load_template_override.empty()) {
                string the_path (ARDOUR::user_template_directory());
                return Glib::build_filename (the_path, load_template_override + ARDOUR::template_suffix);
        }

        if (use_template_button.get_active()) {
                TreeModel::iterator iter = template_chooser.get_active ();
                TreeModel::Row row = (*iter);
                string s = row[session_template_columns.path];
                return s;
        } 

        return string();
}

std::string
SessionDialog::session_name (bool& should_be_new)
{
        if (!_provided_session_name.empty() && !new_only) {
                should_be_new = false;
                return _provided_session_name;
        }

        /* Try recent session selection */

        TreeIter iter = recent_session_display.get_selection()->get_selected();
        
        if (iter) {
                should_be_new = false;
                return (*iter)[recent_session_columns.visible_name];
        }

        if (_existing_session_chooser_used) {
                /* existing session chosen from file chooser */
                should_be_new = false;
                return existing_session_chooser.get_filename ();
        } else {
                should_be_new = true;
                string val = new_name_entry.get_text ();
                strip_whitespace_edges (val);
                return val;
        }
}

std::string
SessionDialog::session_folder ()
{
        if (!_provided_session_path.empty() && !new_only) {
                return _provided_session_path;
        }

        /* Try recent session selection */
        
        TreeIter iter = recent_session_display.get_selection()->get_selected();
        
        if (iter) {
                string s = (*iter)[recent_session_columns.fullpath];
                if (Glib::file_test (s, Glib::FILE_TEST_IS_REGULAR)) {
                        return Glib::path_get_dirname (s);
                }
                return s;
        }

        if (_existing_session_chooser_used) {
                /* existing session chosen from file chooser */
                return Glib::path_get_dirname (existing_session_chooser.get_current_folder ());
        } else {
                std::string val = new_name_entry.get_text();
                strip_whitespace_edges (val);
                std::string legal_session_folder_name = legalize_for_path (val);
                return Glib::build_filename (new_folder_chooser.get_filename (), legal_session_folder_name);
        }
}

void
SessionDialog::setup_initial_choice_box ()
{
        ic_vbox.set_spacing (6);

        HBox* centering_hbox = manage (new HBox);
        VBox* centering_vbox = manage (new VBox);

        centering_vbox->set_spacing (6);

        Label* new_label = manage (new Label);
        new_label->set_markup (string_compose ("<span weight=\"bold\" size=\"large\">%1</span>", _("New Session")));
        new_label->set_justify (JUSTIFY_CENTER);

        ic_new_session_button.add (*new_label);
        ic_new_session_button.signal_clicked().connect (sigc::mem_fun (*this, &SessionDialog::new_session_button_clicked));

        Gtk::HBox* hbox = manage (new HBox);
        Gtk::VBox* vbox = manage (new VBox);
        hbox->set_spacing (12);
        vbox->set_spacing (12);

        string image_path;

        if (find_file (ardour_data_search_path(), "small-splash.png", image_path)) {
                Gtk::Image* image;
                if ((image = manage (new Gtk::Image (image_path))) != 0) {
                        hbox->pack_start (*image, false, false);
                }
        }
        
        vbox->pack_start (ic_new_session_button, true, true, 20);
        hbox->pack_start (*vbox, true, true, 20);
        
        centering_vbox->pack_start (*hbox, false, false);

        /* Possible update message */

        if (ARDOUR_UI::instance()->announce_string() != "" ) {

                Box *info_box = manage (new VBox);
                info_box->set_border_width (12);
                info_box->set_spacing (6);

                info_box->pack_start (info_scroller_label, false, false);

                info_scroller_count = 0;
                info_scroller_connection = Glib::signal_timeout().connect (mem_fun(*this, &SessionDialog::info_scroller_update), 50);

                Gtk::Button *updates_button = manage (new Gtk::Button (_("Check the website for more...")));

                updates_button->signal_clicked().connect (mem_fun(*this, &SessionDialog::updates_button_clicked) );
                ARDOUR_UI::instance()->tooltips().set_tip (*updates_button, _("Click to open the program website in your web browser"));

                info_box->pack_start (*updates_button, false, false);

                info_frame.add (*info_box);
                info_box->show_all ();
                info_frame.show ();
        }

        /* recent session scroller */

        recent_label.set_no_show_all (true);
        recent_scroller.set_no_show_all (true);
        
        recent_label.set_markup (string_compose ("<span weight=\"bold\" size=\"large\">%1</span>", _("Recent Sessions")));
        
        recent_session_model = TreeStore::create (recent_session_columns);
        
        recent_session_display.set_model (recent_session_model);
        recent_session_display.append_column (_("Recent Sessions"), recent_session_columns.visible_name);
        recent_session_display.append_column (_("Sample Rate"), recent_session_columns.sample_rate);
        recent_session_display.append_column (_("Disk Format"), recent_session_columns.disk_format);
        recent_session_display.set_headers_visible (false);
        recent_session_display.get_selection()->set_mode (SELECTION_SINGLE);
        
        recent_session_display.get_selection()->signal_changed().connect (sigc::mem_fun (*this, &SessionDialog::recent_session_row_selected));
        
        recent_scroller.add (recent_session_display);
        recent_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
        recent_scroller.set_shadow_type (Gtk::SHADOW_IN);
        
        recent_session_display.show();
        recent_session_display.signal_row_activated().connect (sigc::mem_fun (*this, &SessionDialog::recent_row_activated));
        
        centering_vbox->pack_start (recent_label, false, false, 12);
        centering_vbox->pack_start (recent_scroller, true, true);

        /* Browse button */
        
        existing_session_chooser.set_title (_("Select session file"));
        existing_session_chooser.signal_file_set().connect (sigc::mem_fun (*this, &SessionDialog::existing_session_selected));
        existing_session_chooser.set_current_folder(poor_mans_glob (Config->get_default_session_parent_dir()));
        
        FileFilter session_filter;
        session_filter.add_pattern (string_compose(X_("*%1"), ARDOUR::statefile_suffix));
        session_filter.set_name (string_compose (_("%1 sessions"), PROGRAM_NAME));
        existing_session_chooser.add_filter (session_filter);
        existing_session_chooser.set_filter (session_filter);
        
#ifdef GTKOSX
        existing_session_chooser.add_shortcut_folder ("/Volumes");
#endif
        
        Label* browse_label = manage (new Label);
        browse_label->set_markup (string_compose ("<span weight=\"bold\" size=\"large\">%1</span>", _("Other Sessions")));
        
        centering_vbox->pack_start (*browse_label, false, false, 12);
        centering_vbox->pack_start (existing_session_chooser, false, false);

        /* pack it all up */

        centering_hbox->pack_start (*centering_vbox, true, true);
        ic_vbox.pack_start (*centering_hbox, true, true);
        ic_vbox.show_all ();
}

void
SessionDialog::session_selected ()
{
        /* HACK HACK HACK ... change the "Apply" button label
           to say "Open"
        */

        Gtk::Widget* tl = ic_vbox.get_toplevel();
        Gtk::Window* win;
        if ((win = dynamic_cast<Gtk::Window*>(tl)) != 0) {
                /* ::get_default_widget() is not wrapped in gtkmm */
                Gtk::Widget* def = wrap (gtk_window_get_default_widget (win->gobj()));
                Gtk::Button* button;
                if ((button = dynamic_cast<Gtk::Button*>(def)) != 0) {
                        button->set_label (_("Open"));
                }
        }
}

void
SessionDialog::new_session_button_clicked ()
{
        _existing_session_chooser_used = false;
        recent_session_display.get_selection()->unselect_all ();

        get_vbox()->remove (ic_vbox);
        get_vbox()->pack_start (session_new_vbox, true, true);
        back_button->set_sensitive (true);
        new_name_entry.grab_focus ();
}

bool
SessionDialog::back_button_pressed (GdkEventButton*)
{
        get_vbox()->remove (session_new_vbox);
        back_button->set_sensitive (false);
        get_vbox()->pack_start (ic_vbox);

        return true;
}

void
SessionDialog::populate_session_templates ()
{
        vector<TemplateInfo> templates;

        find_session_templates (templates);

        template_model->clear ();

        for (vector<TemplateInfo>::iterator x = templates.begin(); x != templates.end(); ++x) {
                TreeModel::Row row;

                row = *(template_model->append ());

                row[session_template_columns.name] = (*x).name;
                row[session_template_columns.path] = (*x).path;
        }

        if (!templates.empty()) {
                /* select first row */
                template_chooser.set_active (0);
        }
}

void
SessionDialog::setup_new_session_page ()
{
        session_new_vbox.set_border_width (12);
        session_new_vbox.set_spacing (18);

        VBox *vbox1 = manage (new VBox);
        HBox* hbox1 = manage (new HBox);
        Label* label1 = manage (new Label);

        vbox1->set_spacing (6);

        hbox1->set_spacing (6);
        hbox1->pack_start (*label1, false, false);
        hbox1->pack_start (new_name_entry, true, true);

        label1->set_text (_("Session name:"));

        if (!ARDOUR_COMMAND_LINE::session_name.empty()) {
                new_name_entry.set_text  (Glib::path_get_basename (ARDOUR_COMMAND_LINE::session_name));
                /* name provided - they can move right along */
                open_button->set_sensitive (true);
        }

        new_name_entry.signal_changed().connect (sigc::mem_fun (*this, &SessionDialog::new_name_changed));
        new_name_entry.signal_activate().connect (sigc::mem_fun (*this, &SessionDialog::new_name_activated));

        vbox1->pack_start (*hbox1, true, true);

        /* --- */

        HBox* hbox2 = manage (new HBox);
        Label* label2 = manage (new Label);

        hbox2->set_spacing (6);
        hbox2->pack_start (*label2, false, false);
        hbox2->pack_start (new_folder_chooser, true, true);

        label2->set_text (_("Create session folder in:"));

        if (!ARDOUR_COMMAND_LINE::session_name.empty()) {
                new_folder_chooser.set_current_folder (poor_mans_glob (Glib::path_get_dirname (ARDOUR_COMMAND_LINE::session_name)));
        } else if (ARDOUR_UI::instance()->session_loaded) {
                // point the new session file chooser at the parent directory of the current session
                string session_parent_dir = Glib::path_get_dirname(ARDOUR_UI::instance()->the_session()->path());
                string::size_type last_dir_sep = session_parent_dir.rfind(G_DIR_SEPARATOR);
                session_parent_dir = session_parent_dir.substr(0, last_dir_sep);
                new_folder_chooser.set_current_folder (session_parent_dir);
                string default_session_folder = poor_mans_glob (Config->get_default_session_parent_dir());

                try {
                        /* add_shortcut_folder throws an exception if the folder being added already has a shortcut */
                        new_folder_chooser.add_shortcut_folder (default_session_folder);
                }
                catch (Glib::Error & e) {
                        std::cerr << "new_folder_chooser.add_shortcut_folder (" << default_session_folder << ") threw Glib::Error " << e.what() << std::endl;
                }
        } else {
                new_folder_chooser.set_current_folder (poor_mans_glob (Config->get_default_session_parent_dir()));
        }
        new_folder_chooser.show ();
        new_folder_chooser.set_title (_("Select folder for session"));

#ifdef __APPLE__
        new_folder_chooser.add_shortcut_folder ("/Volumes");
#endif

        vbox1->pack_start (*hbox2, false, false);
                
        session_new_vbox.pack_start (*vbox1, false, false);

        /* --- */

        VBox *vbox2 = manage (new VBox);
        HBox* hbox3 = manage (new HBox);
        template_model = ListStore::create (session_template_columns);

        vbox2->set_spacing (6);

        VBox *vbox3 = manage (new VBox);

        vbox3->set_spacing (6);

        /* we may want to hide this and show it at various
           times depending on the existence of templates.
        */
        template_chooser.set_no_show_all (true);
        use_template_button.set_no_show_all (true);

        HBox* hbox4a = manage (new HBox);
        use_template_button.set_label (_("Use this template"));
                
        TreeModel::Row row = *template_model->prepend ();
        row[session_template_columns.name] = (_("no template"));
        row[session_template_columns.path] = string();
                
        hbox4a->set_spacing (6);
        hbox4a->pack_start (use_template_button, false, false);
        hbox4a->pack_start (template_chooser, true, true);
                
        template_chooser.set_model (template_model);
                
        Gtk::CellRendererText* text_renderer = Gtk::manage (new Gtk::CellRendererText);
        text_renderer->property_editable() = false;
                
        template_chooser.pack_start (*text_renderer);
        template_chooser.add_attribute (text_renderer->property_text(), session_template_columns.name);
        template_chooser.set_active (0);

        vbox3->pack_start (*hbox4a, false, false);

        /* --- */
        
        HBox* hbox5 = manage (new HBox);
        
        hbox5->set_spacing (6);
        hbox5->pack_start (more_new_session_options_button, false, false);
        
        setup_more_options_box ();
        more_new_session_options_button.add (more_options_vbox);
        
        vbox3->pack_start (*hbox5, false, false);
        hbox3->pack_start (*vbox3, true, true, 8);
        vbox2->pack_start (*hbox3, false, false);
        
        /* --- */
        
        session_new_vbox.pack_start (*vbox2, false, false);
        session_new_vbox.show_all ();
}

void
SessionDialog::new_name_changed ()
{
        if (!new_name_entry.get_text().empty()) {
                session_selected ();
                open_button->set_sensitive (true);
        } else {
                open_button->set_sensitive (false);
        }
}

void
SessionDialog::new_name_activated ()
{
        response (RESPONSE_ACCEPT);
}

int
SessionDialog::redisplay_recent_sessions ()
{
        std::vector<std::string> session_directories;
        RecentSessionsSorter cmp;

        recent_session_display.set_model (Glib::RefPtr<TreeModel>(0));
        recent_session_model->clear ();

        ARDOUR::RecentSessions rs;
        ARDOUR::read_recent_sessions (rs);

        if (rs.empty()) {
                recent_session_display.set_model (recent_session_model);
                return 0;
        }
        //
        // sort them alphabetically
        sort (rs.begin(), rs.end(), cmp);

        for (ARDOUR::RecentSessions::iterator i = rs.begin(); i != rs.end(); ++i) {
                session_directories.push_back ((*i).second);
        }
        
        int session_snapshot_count = 0;

        for (vector<std::string>::const_iterator i = session_directories.begin(); i != session_directories.end(); ++i)
        {
                std::vector<std::string> state_file_paths;

                // now get available states for this session

                get_state_files_in_directory (*i, state_file_paths);

                vector<string> states;
                vector<const gchar*> item;
                string dirname = *i;

                /* remove any trailing / */

                if (dirname[dirname.length()-1] == '/') {
                        dirname = dirname.substr (0, dirname.length()-1);
                }

                /* check whether session still exists */
                if (!Glib::file_test(dirname.c_str(), Glib::FILE_TEST_EXISTS)) {
                        /* session doesn't exist */
                        continue;
                }

                /* now get available states for this session */

                states = Session::possible_states (dirname);

                if (states.empty()) {
                        /* no state file? */
                        continue;
                }

                std::vector<string> state_file_names(get_file_names_no_extension (state_file_paths));

                if (state_file_names.empty()) {
                        continue;
                }

                Gtk::TreeModel::Row row = *(recent_session_model->append());

                float sr;
                SampleFormat sf;
                std::string state_file_basename = state_file_names.front();

                std::string s = Glib::build_filename (dirname, state_file_basename + statefile_suffix);

                row[recent_session_columns.fullpath] = dirname; /* just the dir, but this works too */
                row[recent_session_columns.tip] = Glib::Markup::escape_text (dirname);

                if (Session::get_info_from_path (s, sr, sf) == 0) {
                        row[recent_session_columns.sample_rate] = rate_as_string (sr);
                        switch (sf) {
                        case FormatFloat:
                                row[recent_session_columns.disk_format] = _("32 bit float");
                                break;
                        case FormatInt24:
                                row[recent_session_columns.disk_format] = _("24 bit");
                                break;
                        case FormatInt16:
                                row[recent_session_columns.disk_format] = _("16 bit");
                                break;
                        }
                } else {
                        row[recent_session_columns.sample_rate] = "??";
                        row[recent_session_columns.disk_format] = "--";
                }

                ++session_snapshot_count;

                if (state_file_names.size() > 1) {
                        // multiple session files in the session directory - show the directory name.
                        // if there's not a session file with the same name as the session directory,
                        // opening the parent item will fail, but expanding it will show the session
                        // files that actually exist, and the right one can then be opened.
                        row[recent_session_columns.visible_name] = Glib::path_get_basename (dirname);

                        // add the children
                        for (std::vector<std::string>::iterator i2 = state_file_names.begin(); i2 != state_file_names.end(); ++i2) {

                                Gtk::TreeModel::Row child_row = *(recent_session_model->append (row.children()));
                                
                                child_row[recent_session_columns.visible_name] = *i2;
                                child_row[recent_session_columns.fullpath] = Glib::build_filename (dirname, *i2 + statefile_suffix);
                                child_row[recent_session_columns.tip] = Glib::Markup::escape_text (dirname);
                                
                                if (Session::get_info_from_path (s, sr, sf) == 0) {
                                        child_row[recent_session_columns.sample_rate] = rate_as_string (sr);
                                        switch (sf) {
                                        case FormatFloat:
                                                child_row[recent_session_columns.disk_format] = _("32 bit float");
                                                break;
                                        case FormatInt24:
                                                child_row[recent_session_columns.disk_format] = _("24 bit");
                                                break;
                                        case FormatInt16:
                                                child_row[recent_session_columns.disk_format] = _("16 bit");
                                                break;
                                        }
                                } else {
                                        child_row[recent_session_columns.sample_rate] = "??";
                                        child_row[recent_session_columns.disk_format] = "--";
                                }
                                

                                ++session_snapshot_count;
                        }
                } else {
                        // only a single session file in the directory - show its actual name.
                        row[recent_session_columns.visible_name] = state_file_basename;
                }
        }

        recent_session_display.set_tooltip_column(1); // recent_session_columns.tip 
        recent_session_display.set_model (recent_session_model);
        return session_snapshot_count;
}

void
SessionDialog::recent_session_row_selected ()
{
        if (recent_session_display.get_selection()->count_selected_rows() > 0) {
                open_button->set_sensitive (true);
                session_selected ();
        } else {
                open_button->set_sensitive (false);
        }
}

void
SessionDialog::setup_more_options_box ()
{
        more_options_vbox.set_border_width (24);

        _output_limit_count.set_adjustment (_output_limit_count_adj);
        _input_limit_count.set_adjustment (_input_limit_count_adj);
        _master_bus_channel_count.set_adjustment (_master_bus_channel_count_adj);

        chan_count_label_1.set_text (_("channels"));
        chan_count_label_3.set_text (_("channels"));
        chan_count_label_4.set_text (_("channels"));

        chan_count_label_1.set_alignment(0,0.5);
        chan_count_label_1.set_padding(0,0);
        chan_count_label_1.set_line_wrap(false);

        chan_count_label_3.set_alignment(0,0.5);
        chan_count_label_3.set_padding(0,0);
        chan_count_label_3.set_line_wrap(false);

        chan_count_label_4.set_alignment(0,0.5);
        chan_count_label_4.set_padding(0,0);
        chan_count_label_4.set_line_wrap(false);

        bus_label.set_markup (_("<b>Busses</b>"));
        input_label.set_markup (_("<b>Inputs</b>"));
        output_label.set_markup (_("<b>Outputs</b>"));

        _master_bus_channel_count.set_flags(Gtk::CAN_FOCUS);
        _master_bus_channel_count.set_update_policy(Gtk::UPDATE_ALWAYS);
        _master_bus_channel_count.set_numeric(true);
        _master_bus_channel_count.set_digits(0);
        _master_bus_channel_count.set_wrap(false);

        _create_master_bus.set_label (_("Create master bus"));
        _create_master_bus.set_flags(Gtk::CAN_FOCUS);
        _create_master_bus.set_relief(Gtk::RELIEF_NORMAL);
        _create_master_bus.set_mode(true);
        _create_master_bus.set_active(true);
        _create_master_bus.set_border_width(0);

        advanced_table.set_row_spacings(0);
        advanced_table.set_col_spacings(0);

        _connect_inputs.set_label (_("Automatically connect to physical inputs"));
        _connect_inputs.set_flags(Gtk::CAN_FOCUS);
        _connect_inputs.set_relief(Gtk::RELIEF_NORMAL);
        _connect_inputs.set_mode(true);
        _connect_inputs.set_active(Config->get_input_auto_connect() != ManualConnect);
        _connect_inputs.set_border_width(0);

        _limit_input_ports.set_label (_("Use only"));
        _limit_input_ports.set_flags(Gtk::CAN_FOCUS);
        _limit_input_ports.set_relief(Gtk::RELIEF_NORMAL);
        _limit_input_ports.set_mode(true);
        _limit_input_ports.set_sensitive(true);
        _limit_input_ports.set_border_width(0);

        _input_limit_count.set_flags(Gtk::CAN_FOCUS);
        _input_limit_count.set_update_policy(Gtk::UPDATE_ALWAYS);
        _input_limit_count.set_numeric(true);
        _input_limit_count.set_digits(0);
        _input_limit_count.set_wrap(false);
        _input_limit_count.set_sensitive(false);

        bus_hbox.pack_start (bus_table, Gtk::PACK_SHRINK, 18);

        bus_label.set_alignment(0, 0.5);
        bus_label.set_padding(0,0);
        bus_label.set_line_wrap(false);
        bus_label.set_selectable(false);
        bus_label.set_use_markup(true);
        bus_frame.set_shadow_type(Gtk::SHADOW_NONE);
        bus_frame.set_label_align(0,0.5);
        bus_frame.add(bus_hbox);
        bus_frame.set_label_widget(bus_label);

        bus_table.set_row_spacings (0);
        bus_table.set_col_spacings (0);
        bus_table.attach (_create_master_bus, 0, 1, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
        bus_table.attach (_master_bus_channel_count, 1, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
        bus_table.attach (chan_count_label_1, 2, 3, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 6, 0);

        input_port_limit_hbox.pack_start(_limit_input_ports, Gtk::PACK_SHRINK, 6);
        input_port_limit_hbox.pack_start(_input_limit_count, Gtk::PACK_SHRINK, 0);
        input_port_limit_hbox.pack_start(chan_count_label_3, Gtk::PACK_SHRINK, 6);
        input_port_vbox.pack_start(_connect_inputs, Gtk::PACK_SHRINK, 0);
        input_port_vbox.pack_start(input_port_limit_hbox, Gtk::PACK_EXPAND_PADDING, 0);
        input_table.set_row_spacings(0);
        input_table.set_col_spacings(0);
        input_table.attach(input_port_vbox, 0, 1, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 6, 6);

        input_hbox.pack_start (input_table, Gtk::PACK_SHRINK, 18);

        input_label.set_alignment(0, 0.5);
        input_label.set_padding(0,0);
        input_label.set_line_wrap(false);
        input_label.set_selectable(false);
        input_label.set_use_markup(true);
        input_frame.set_shadow_type(Gtk::SHADOW_NONE);
        input_frame.set_label_align(0,0.5);
        input_frame.add(input_hbox);
        input_frame.set_label_widget(input_label);

        _connect_outputs.set_label (_("Automatically connect outputs"));
        _connect_outputs.set_flags(Gtk::CAN_FOCUS);
        _connect_outputs.set_relief(Gtk::RELIEF_NORMAL);
        _connect_outputs.set_mode(true);
        _connect_outputs.set_active(Config->get_output_auto_connect() != ManualConnect);
        _connect_outputs.set_border_width(0);
        _limit_output_ports.set_label (_("Use only"));
        _limit_output_ports.set_flags(Gtk::CAN_FOCUS);
        _limit_output_ports.set_relief(Gtk::RELIEF_NORMAL);
        _limit_output_ports.set_mode(true);
        _limit_output_ports.set_sensitive(true);
        _limit_output_ports.set_border_width(0);
        _output_limit_count.set_flags(Gtk::CAN_FOCUS);
        _output_limit_count.set_update_policy(Gtk::UPDATE_ALWAYS);
        _output_limit_count.set_numeric(false);
        _output_limit_count.set_digits(0);
        _output_limit_count.set_wrap(false);
        _output_limit_count.set_sensitive(false);
        output_port_limit_hbox.pack_start(_limit_output_ports, Gtk::PACK_SHRINK, 6);
        output_port_limit_hbox.pack_start(_output_limit_count, Gtk::PACK_SHRINK, 0);
        output_port_limit_hbox.pack_start(chan_count_label_4, Gtk::PACK_SHRINK, 6);

        _connect_outputs_to_master.set_label (_("... to master bus"));
        _connect_outputs_to_master.set_flags(Gtk::CAN_FOCUS);
        _connect_outputs_to_master.set_relief(Gtk::RELIEF_NORMAL);
        _connect_outputs_to_master.set_mode(true);
        _connect_outputs_to_master.set_active(Config->get_output_auto_connect() == AutoConnectMaster);
        _connect_outputs_to_master.set_border_width(0);

        _connect_outputs_to_master.set_group (connect_outputs_group);
        _connect_outputs_to_physical.set_group (connect_outputs_group);

        _connect_outputs_to_physical.set_label (_("... to physical outputs"));
        _connect_outputs_to_physical.set_flags(Gtk::CAN_FOCUS);
        _connect_outputs_to_physical.set_relief(Gtk::RELIEF_NORMAL);
        _connect_outputs_to_physical.set_mode(true);
        _connect_outputs_to_physical.set_active(Config->get_output_auto_connect() == AutoConnectPhysical);
        _connect_outputs_to_physical.set_border_width(0);

        output_conn_vbox.pack_start(_connect_outputs, Gtk::PACK_SHRINK, 0);
        output_conn_vbox.pack_start(_connect_outputs_to_master, Gtk::PACK_SHRINK, 0);
        output_conn_vbox.pack_start(_connect_outputs_to_physical, Gtk::PACK_SHRINK, 0);
        output_vbox.set_border_width(6);

        output_port_vbox.pack_start(output_port_limit_hbox, Gtk::PACK_SHRINK, 0);

        output_vbox.pack_start(output_conn_vbox);
        output_vbox.pack_start(output_port_vbox);

        output_label.set_alignment(0, 0.5);
        output_label.set_padding(0,0);
        output_label.set_line_wrap(false);
        output_label.set_selectable(false);
        output_label.set_use_markup(true);
        output_frame.set_shadow_type(Gtk::SHADOW_NONE);
        output_frame.set_label_align(0,0.5);

        output_hbox.pack_start (output_vbox, Gtk::PACK_SHRINK, 18);

        output_frame.add(output_hbox);
        output_frame.set_label_widget(output_label);

        more_options_vbox.pack_start(advanced_table, Gtk::PACK_SHRINK, 0);
        more_options_vbox.pack_start(bus_frame, Gtk::PACK_SHRINK, 6);
        more_options_vbox.pack_start(input_frame, Gtk::PACK_SHRINK, 6);
        more_options_vbox.pack_start(output_frame, Gtk::PACK_SHRINK, 0);

        /* signals */

        _connect_inputs.signal_clicked().connect (sigc::mem_fun (*this, &SessionDialog::connect_inputs_clicked));
        _connect_outputs.signal_clicked().connect (sigc::mem_fun (*this, &SessionDialog::connect_outputs_clicked));
        _limit_input_ports.signal_clicked().connect (sigc::mem_fun (*this, &SessionDialog::limit_inputs_clicked));
        _limit_output_ports.signal_clicked().connect (sigc::mem_fun (*this, &SessionDialog::limit_outputs_clicked));
        _create_master_bus.signal_clicked().connect (sigc::mem_fun (*this, &SessionDialog::master_bus_button_clicked));

        /* note that more_options_vbox is "visible" by default even
         * though it may not be displayed to the user, this is so the dialog
         * doesn't resize.
         */
        more_options_vbox.show_all ();
}

bool
SessionDialog::create_master_bus() const
{
        return _create_master_bus.get_active();
}

int
SessionDialog::master_channel_count() const
{
        return _master_bus_channel_count.get_value_as_int();
}

bool
SessionDialog::connect_inputs() const
{
        return _connect_inputs.get_active();
}

bool
SessionDialog::limit_inputs_used_for_connection() const
{
        return _limit_input_ports.get_active();
}

int
SessionDialog::input_limit_count() const
{
        return _input_limit_count.get_value_as_int();
}

bool
SessionDialog::connect_outputs() const
{
        return _connect_outputs.get_active();
}

bool
SessionDialog::limit_outputs_used_for_connection() const
{
        return _limit_output_ports.get_active();
}

int
SessionDialog::output_limit_count() const
{
        return _output_limit_count.get_value_as_int();
}

bool
SessionDialog::connect_outs_to_master() const
{
        return _connect_outputs_to_master.get_active();
}

bool
SessionDialog::connect_outs_to_physical() const
{
        return _connect_outputs_to_physical.get_active();
}

void
SessionDialog::connect_inputs_clicked ()
{
        _limit_input_ports.set_sensitive(_connect_inputs.get_active());

        if (_connect_inputs.get_active() && _limit_input_ports.get_active()) {
                _input_limit_count.set_sensitive(true);
        } else {
                _input_limit_count.set_sensitive(false);
        }
}

void
SessionDialog::connect_outputs_clicked ()
{
        bool const co = _connect_outputs.get_active ();
        _limit_output_ports.set_sensitive(co);
        _connect_outputs_to_master.set_sensitive(co);
        _connect_outputs_to_physical.set_sensitive(co);

        if (co && _limit_output_ports.get_active()) {
                _output_limit_count.set_sensitive(true);
        } else {
                _output_limit_count.set_sensitive(false);
        }
}

void
SessionDialog::limit_inputs_clicked ()
{
        _input_limit_count.set_sensitive(_limit_input_ports.get_active());
}

void
SessionDialog::limit_outputs_clicked ()
{
        _output_limit_count.set_sensitive(_limit_output_ports.get_active());
}

void
SessionDialog::master_bus_button_clicked ()
{
        bool const yn = _create_master_bus.get_active();

        _master_bus_channel_count.set_sensitive(yn);
        _connect_outputs_to_master.set_sensitive(yn);
}

void
SessionDialog::recent_row_activated (const Gtk::TreePath&, Gtk::TreeViewColumn*)
{
        response (RESPONSE_ACCEPT);
}

void
SessionDialog::existing_session_selected ()
{
        _existing_session_chooser_used = true;
        recent_session_display.get_selection()->unselect_all();
        /* mark this sensitive in case we come back here after a failed open
         * attempt and the user has hacked up the fix. sigh.
         */
        open_button->set_sensitive (true);
        response (RESPONSE_ACCEPT);
}

void
SessionDialog::updates_button_clicked ()
{
        //now open a browser window so user can see more
        PBD::open_uri (Config->get_updates_url());
}

bool
SessionDialog::info_scroller_update()
{
        info_scroller_count++;

        char buf[512];
        snprintf (buf, std::min(info_scroller_count,sizeof(buf)-1), "%s", ARDOUR_UI::instance()->announce_string().c_str() );
        buf[info_scroller_count] = 0;
        info_scroller_label.set_text (buf);
        info_scroller_label.show();

        if (info_scroller_count > ARDOUR_UI::instance()->announce_string().length()) {
                info_scroller_connection.disconnect();
        }

        return true;
}

bool
SessionDialog::on_delete_event (GdkEventAny* ev)
{
        response (RESPONSE_CANCEL);
        return ArdourDialog::on_delete_event (ev);
}