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ardour_ui2.cc

/*
    Copyright (C) 1999 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.

*/

#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <cerrno>
#include <iostream>
#include <cmath>

#include <sigc++/bind.h>
#include <pbd/error.h>
#include <pbd/basename.h>
#include <pbd/fastlog.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/click_box.h>
#include <gtkmm2ext/tearoff.h>

#include <ardour/audioengine.h>
#include <ardour/ardour.h>
#include <ardour/profile.h>
#include <ardour/route.h>

#include "ardour_ui.h"
#include "keyboard.h"
#include "public_editor.h"
#include "audio_clock.h"
#include "actions.h"
#include "utils.h"
#include "theme_manager.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace Gtkmm2ext;
using namespace Gtk;
using namespace Glib;
using namespace sigc;

int   
ARDOUR_UI::setup_windows ()
{
      if (create_editor ()) {
            error << _("UI: cannot setup editor") << endmsg;
            return -1;
      }

      if (create_mixer ()) {
            error << _("UI: cannot setup mixer") << endmsg;
            return -1;
      }

      /* all other dialogs are created conditionally */

      we_have_dependents ();

      setup_clock ();
      setup_transport();
      build_menu_bar ();

      theme_manager->signal_unmap().connect (bind (sigc::ptr_fun(&ActionManager::uncheck_toggleaction), X_("<Actions>/Common/ToggleThemeManager")));

#ifdef TOP_MENUBAR
      HBox* status_bar_packer = manage (new HBox);
      
      status_bar_label.set_size_request (300, -1);
      status_bar_packer->pack_start (status_bar_label, true, true, 6);
      status_bar_packer->pack_start (error_log_button, false, false);
      
      error_log_button.signal_clicked().connect (mem_fun (*this, &UI::toggle_errors));

      editor->get_status_bar_packer().pack_start (*status_bar_packer, true, true);
      editor->get_status_bar_packer().pack_start (menu_bar_base, false, false, 6);
#else
      top_packer.pack_start (menu_bar_base, false, false);
#endif 
      top_packer.pack_start (transport_frame, false, false);

      editor->add_toplevel_controls (top_packer);

      return 0;
}

void
ARDOUR_UI::display_message (const char *prefix, gint prefix_len, RefPtr<TextBuffer::Tag> ptag, RefPtr<TextBuffer::Tag> mtag, const char *msg)
{
      ustring text;

      UI::display_message (prefix, prefix_len, ptag, mtag, msg);
#ifdef TOP_MENUBAR

      if (strcmp (prefix, _("[ERROR]: ")) == 0) {
            text = "<span color=\"red\" weight=\"bold\">";
      } else if (strcmp (prefix, _("[WARNING]: ")) == 0) {
            text = "<span color=\"yellow\" weight=\"bold\">";
      } else if (strcmp (prefix, _("[INFO]: ")) == 0) {
            text = "<span color=\"green\" weight=\"bold\">";
      } else {
            text = "<span color=\"blue\" weight=\"bold\">???";
      }

      text += prefix;
      text += "</span>";
      text += msg;

      status_bar_label.set_markup (text);
#endif
}

void
ARDOUR_UI::transport_stopped ()
{
      stop_button.set_visual_state (1);
      
      roll_button.set_visual_state (0);
      play_selection_button.set_visual_state (0);
      auto_loop_button.set_visual_state (0);

      shuttle_fract = 0;
      shuttle_box.queue_draw ();

      update_disk_space ();
}

void
ARDOUR_UI::transport_rolling ()
{
      stop_button.set_visual_state (0);
      if (session->get_play_range()) {
            play_selection_button.set_visual_state (1);
            roll_button.set_visual_state (0);
            auto_loop_button.set_visual_state (0);

      } else if (session->get_play_loop ()) {
            auto_loop_button.set_visual_state (1);
            play_selection_button.set_visual_state (0);
            roll_button.set_visual_state (0);

      } else {

            roll_button.set_visual_state (1);
            play_selection_button.set_visual_state (0);
            auto_loop_button.set_visual_state (0);
      }

      /* reset shuttle controller */

      shuttle_fract = SHUTTLE_FRACT_SPEED1;  /* speed = 1.0, believe it or not */
      shuttle_box.queue_draw ();
}

void
ARDOUR_UI::transport_rewinding ()
{
      stop_button.set_visual_state (0);
      roll_button.set_visual_state (1);
      play_selection_button.set_visual_state (0);
      auto_loop_button.set_visual_state (0);
}

void
ARDOUR_UI::transport_forwarding ()
{
      stop_button.set_visual_state (0);
      roll_button.set_visual_state (1);
      play_selection_button.set_visual_state (0);
      auto_loop_button.set_visual_state (0);
}

void
ARDOUR_UI::setup_transport ()
{
      transport_tearoff = manage (new TearOff (transport_tearoff_hbox));
      transport_tearoff->set_name ("TransportBase");

      transport_hbox.pack_start (*transport_tearoff, true, false);

      transport_base.set_name ("TransportBase");
      transport_base.add (transport_hbox);

      transport_frame.set_shadow_type (SHADOW_OUT);
      transport_frame.set_name ("BaseFrame");
      transport_frame.add (transport_base);

      transport_tearoff->Detach.connect (bind (mem_fun(*this, &ARDOUR_UI::detach_tearoff), static_cast<Box*>(&top_packer), 
                                     static_cast<Widget*>(&transport_frame)));
      transport_tearoff->Attach.connect (bind (mem_fun(*this, &ARDOUR_UI::reattach_tearoff), static_cast<Box*> (&top_packer), 
                                     static_cast<Widget*> (&transport_frame), 1));
      transport_tearoff->Hidden.connect (bind (mem_fun(*this, &ARDOUR_UI::detach_tearoff), static_cast<Box*>(&top_packer), 
                                     static_cast<Widget*>(&transport_frame)));
      transport_tearoff->Visible.connect (bind (mem_fun(*this, &ARDOUR_UI::reattach_tearoff), static_cast<Box*> (&top_packer), 
                                      static_cast<Widget*> (&transport_frame), 1));
      
      shuttle_box.set_name ("TransportButton");
      goto_start_button.set_name ("TransportButton");
      goto_end_button.set_name ("TransportButton");
      roll_button.set_name ("TransportButton");
      stop_button.set_name ("TransportButton");
      play_selection_button.set_name ("TransportButton");
      rec_button.set_name ("TransportRecButton");
      auto_loop_button.set_name ("TransportButton");

      auto_return_button.set_name ("TransportButton");
      auto_play_button.set_name ("TransportButton");
      auto_input_button.set_name ("TransportButton");
      punch_in_button.set_name ("TransportButton");
      punch_out_button.set_name ("TransportButton");
      click_button.set_name ("TransportButton");
      time_master_button.set_name ("TransportButton");

      stop_button.set_size_request(29, -1);
      roll_button.set_size_request(29, -1);
      auto_loop_button.set_size_request(29, -1);
      play_selection_button.set_size_request(29, -1);
      goto_start_button.set_size_request(29, -1);
      goto_end_button.set_size_request(29, -1);
      rec_button.set_size_request(29, -1);
      
      Widget* w;

      stop_button.set_visual_state (1);
      
      w = manage (new Image (get_icon (X_("transport_start"))));
      w->show();
      goto_start_button.add (*w);
      w = manage (new Image (get_icon (X_("transport_end"))));
      w->show();
      goto_end_button.add (*w);
      w = manage (new Image (get_icon (X_("transport_play"))));
      w->show();
      roll_button.add (*w);
      w = manage (new Image (get_icon (X_("transport_stop"))));
      w->show();
      stop_button.add (*w);
      w = manage (new Image (get_icon (X_("transport_range"))));
      w->show();
      play_selection_button.add (*w);
      w = manage (new Image (get_icon (X_("transport_record"))));
      w->show();
      rec_button.add (*w);
      w = manage (new Image (get_icon (X_("transport_loop"))));
      w->show();
      auto_loop_button.add (*w);

      RefPtr<Action> act;

      act = ActionManager::get_action (X_("Transport"), X_("Stop"));
      act->connect_proxy (stop_button);
      act = ActionManager::get_action (X_("Transport"), X_("Roll"));
      act->connect_proxy (roll_button);
      act = ActionManager::get_action (X_("Transport"), X_("Record"));
      act->connect_proxy (rec_button);
      act = ActionManager::get_action (X_("Transport"), X_("GotoStart"));
      act->connect_proxy (goto_start_button);
      act = ActionManager::get_action (X_("Transport"), X_("GotoEnd"));
      act->connect_proxy (goto_end_button);
      act = ActionManager::get_action (X_("Transport"), X_("Loop"));
      act->connect_proxy (auto_loop_button);
      act = ActionManager::get_action (X_("Transport"), X_("PlaySelection"));
      act->connect_proxy (play_selection_button);
      act = ActionManager::get_action (X_("Transport"), X_("ToggleTimeMaster"));
      act->connect_proxy (time_master_button);

      ARDOUR_UI::instance()->tooltips().set_tip (roll_button, _("Play from playhead"));
      ARDOUR_UI::instance()->tooltips().set_tip (stop_button, _("Stop playback"));
      ARDOUR_UI::instance()->tooltips().set_tip (play_selection_button, _("Play range/selection"));
      ARDOUR_UI::instance()->tooltips().set_tip (goto_start_button, _("Go to start of session"));
      ARDOUR_UI::instance()->tooltips().set_tip (goto_end_button, _("Go to end of session"));
      ARDOUR_UI::instance()->tooltips().set_tip (auto_loop_button, _("Play loop range"));

      ARDOUR_UI::instance()->tooltips().set_tip (auto_return_button, _("Return to last playback start when stopped"));
      ARDOUR_UI::instance()->tooltips().set_tip (auto_play_button, _("Start playback after any locate"));
      ARDOUR_UI::instance()->tooltips().set_tip (auto_input_button, _("Be sensible about input monitoring"));
      ARDOUR_UI::instance()->tooltips().set_tip (punch_in_button, _("Start recording at auto-punch start"));
      ARDOUR_UI::instance()->tooltips().set_tip (punch_out_button, _("Stop recording at auto-punch end"));
      ARDOUR_UI::instance()->tooltips().set_tip (click_button, _("Enable/Disable audio click"));
      ARDOUR_UI::instance()->tooltips().set_tip (sync_option_combo, _("Positional sync source"));
      ARDOUR_UI::instance()->tooltips().set_tip (time_master_button, _("Does Ardour control the time?"));
      ARDOUR_UI::instance()->tooltips().set_tip (shuttle_box, _("Shuttle speed control"));
      ARDOUR_UI::instance()->tooltips().set_tip (shuttle_units_button, _("Select semitones or %%-age for speed display"));
      ARDOUR_UI::instance()->tooltips().set_tip (speed_display_box, _("Current transport speed"));
      
      shuttle_box.set_flags (CAN_FOCUS);
      shuttle_box.add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      shuttle_box.set_size_request (100, 15);

      shuttle_box.signal_button_press_event().connect (mem_fun(*this, &ARDOUR_UI::shuttle_box_button_press));
      shuttle_box.signal_button_release_event().connect (mem_fun(*this, &ARDOUR_UI::shuttle_box_button_release));
      shuttle_box.signal_scroll_event().connect (mem_fun(*this, &ARDOUR_UI::shuttle_box_scroll));
      shuttle_box.signal_motion_notify_event().connect (mem_fun(*this, &ARDOUR_UI::shuttle_box_motion));
      shuttle_box.signal_expose_event().connect (mem_fun(*this, &ARDOUR_UI::shuttle_box_expose));

      /* clocks, etc. */

      ARDOUR_UI::Clock.connect (bind (mem_fun (primary_clock, &AudioClock::set), 1));
      ARDOUR_UI::Clock.connect (bind (mem_fun (secondary_clock, &AudioClock::set), 2));

      primary_clock.ValueChanged.connect (mem_fun(*this, &ARDOUR_UI::primary_clock_value_changed));
      secondary_clock.ValueChanged.connect (mem_fun(*this, &ARDOUR_UI::secondary_clock_value_changed));
      big_clock.ValueChanged.connect (mem_fun(*this, &ARDOUR_UI::big_clock_value_changed));

      ARDOUR_UI::instance()->tooltips().set_tip (primary_clock, _("Primary clock"));
      ARDOUR_UI::instance()->tooltips().set_tip (secondary_clock, _("secondary clock"));

      ActionManager::get_action ("Transport", "ToggleAutoReturn")->connect_proxy (auto_return_button);
      ActionManager::get_action ("Transport", "ToggleAutoPlay")->connect_proxy (auto_play_button);
      ActionManager::get_action ("Transport", "ToggleAutoInput")->connect_proxy (auto_input_button);
      ActionManager::get_action ("Transport", "ToggleClick")->connect_proxy (click_button);
      ActionManager::get_action ("Transport", "TogglePunchIn")->connect_proxy (punch_in_button);
      ActionManager::get_action ("Transport", "TogglePunchOut")->connect_proxy (punch_out_button);

      preroll_button.set_name ("TransportButton");
      postroll_button.set_name ("TransportButton");

      preroll_clock.set_mode (AudioClock::MinSec);
      preroll_clock.set_name ("TransportClockDisplay");
      postroll_clock.set_mode (AudioClock::MinSec);
      postroll_clock.set_name ("TransportClockDisplay");

      /* alerts */

      /* CANNOT bind these to clicked or toggled, must use pressed or released */

      solo_alert_button.set_name ("TransportSoloAlert");
      solo_alert_button.signal_pressed().connect (mem_fun(*this,&ARDOUR_UI::solo_alert_toggle));
      auditioning_alert_button.set_name ("TransportAuditioningAlert");
      auditioning_alert_button.signal_pressed().connect (mem_fun(*this,&ARDOUR_UI::audition_alert_toggle));

      tooltips().set_tip (solo_alert_button, _("When active, something is soloed.\nClick to de-solo everything"));
      tooltips().set_tip (auditioning_alert_button, _("When active, auditioning is taking place\nClick to stop the audition"));

      alert_box.pack_start (solo_alert_button, false, false);
      alert_box.pack_start (auditioning_alert_button, false, false);

      transport_tearoff_hbox.set_border_width (3);

      transport_tearoff_hbox.pack_start (goto_start_button, false, false);
      transport_tearoff_hbox.pack_start (goto_end_button, false, false);

      Frame* sframe = manage (new Frame);
      VBox*  svbox = manage (new VBox);
      HBox*  shbox = manage (new HBox);

      sframe->set_shadow_type (SHADOW_IN);
      sframe->add (shuttle_box);

      shuttle_box.set_name (X_("ShuttleControl"));

      speed_display_box.add (speed_display_label);
      speed_display_box.set_name (X_("ShuttleDisplay"));

      shuttle_units_button.set_name (X_("ShuttleButton"));
      shuttle_units_button.signal_clicked().connect (mem_fun(*this, &ARDOUR_UI::shuttle_unit_clicked));
      
      shuttle_style_button.set_name (X_("ShuttleButton"));

      vector<string> shuttle_strings;
      shuttle_strings.push_back (_("sprung"));
      shuttle_strings.push_back (_("wheel"));
      set_popdown_strings (shuttle_style_button, shuttle_strings);
      shuttle_style_button.signal_changed().connect (mem_fun (*this, &ARDOUR_UI::shuttle_style_changed));

      Frame* sdframe = manage (new Frame);

      sdframe->set_shadow_type (SHADOW_IN);
      sdframe->add (speed_display_box);

      mtc_port_changed ();
      sync_option_combo.signal_changed().connect (mem_fun (*this, &ARDOUR_UI::sync_option_changed));
      const guint32 FUDGE = 25; // Combo's are stupid - they steal space from the entry for the button
      set_size_request_to_display_given_text (sync_option_combo, X_("Igternal"), 2+FUDGE, 10);

      shbox->pack_start (*sdframe, false, false);
      shbox->pack_start (shuttle_units_button, true, true);
      shbox->pack_start (shuttle_style_button, false, false);
      
      svbox->pack_start (*sframe, false, false);
      svbox->pack_start (*shbox, false, false);

      transport_tearoff_hbox.pack_start (*svbox, false, false, 3);

      transport_tearoff_hbox.pack_start (auto_loop_button, false, false);
      if (!Profile->get_sae()) {
            transport_tearoff_hbox.pack_start (play_selection_button, false, false);
      }
      transport_tearoff_hbox.pack_start (roll_button, false, false);
      transport_tearoff_hbox.pack_start (stop_button, false, false);
      transport_tearoff_hbox.pack_start (rec_button, false, false, 6);

      HBox* clock_box = manage (new HBox);
      clock_box->pack_start (primary_clock, false, false);
      if (!ARDOUR::Profile->get_small_screen()) {
            clock_box->pack_start (secondary_clock, false, false);
      }

      if (!Profile->get_sae()) {
            VBox* time_controls_box = manage (new VBox);
            time_controls_box->pack_start (sync_option_combo, false, false);
            time_controls_box->pack_start (time_master_button, false, false);
            clock_box->pack_start (*time_controls_box, false, false, 1);
      }

      transport_tearoff_hbox.pack_start (*clock_box, false, false, 0);

      HBox* toggle_box = manage(new HBox);
      
      VBox* punch_box = manage (new VBox);
      punch_box->pack_start (punch_in_button, false, false);
      punch_box->pack_start (punch_out_button, false, false);
      toggle_box->pack_start (*punch_box, false, false);

      VBox* auto_box = manage (new VBox);
      auto_box->pack_start (auto_play_button, false, false);
      auto_box->pack_start (auto_return_button, false, false);
      toggle_box->pack_start (*auto_box, false, false);
      
      VBox* io_box = manage (new VBox);
      io_box->pack_start (auto_input_button, false, false);
      io_box->pack_start (click_button, false, false);
      toggle_box->pack_start (*io_box, false, false);
      
      /* desensitize */

      set_transport_sensitivity (false);

//    toggle_box->pack_start (preroll_button, false, false);
//    toggle_box->pack_start (preroll_clock, false, false);

//    toggle_box->pack_start (postroll_button, false, false);
//    toggle_box->pack_start (postroll_clock, false, false);

      transport_tearoff_hbox.pack_start (*toggle_box, false, false, 4);
      transport_tearoff_hbox.pack_start (alert_box, false, false);

      if (Profile->get_sae()) {
            Image* img = manage (new Image ((::get_icon (X_("sae")))));
            transport_tearoff_hbox.pack_end (*img, false, false, 6);
      }
}

void
ARDOUR_UI::manage_window (Window& win)
{
      win.signal_delete_event().connect (bind (sigc::ptr_fun (just_hide_it), &win));
      win.signal_enter_notify_event().connect (bind (mem_fun (Keyboard::the_keyboard(), &Keyboard::enter_window), &win));
      win.signal_leave_notify_event().connect (bind (mem_fun (Keyboard::the_keyboard(), &Keyboard::leave_window), &win));
}

void
ARDOUR_UI::detach_tearoff (Box* b, Widget* w)
{
//    editor->ensure_float (transport_tearoff->tearoff_window());
      b->remove (*w);
}

void
ARDOUR_UI::reattach_tearoff (Box* b, Widget* w, int32_t n)
{
      b->pack_start (*w);
      b->reorder_child (*w, n);
}

void
ARDOUR_UI::soloing_changed (bool onoff)
{
      if (solo_alert_button.get_active() != onoff) {
            solo_alert_button.set_active (onoff);
      }
}

void
ARDOUR_UI::_auditioning_changed (bool onoff)
{
      if (auditioning_alert_button.get_active() != onoff) {
            auditioning_alert_button.set_active (onoff);
            set_transport_sensitivity (!onoff);
      }
}

void
ARDOUR_UI::auditioning_changed (bool onoff)
{
      UI::instance()->call_slot(bind (mem_fun(*this, &ARDOUR_UI::_auditioning_changed), onoff));
}

void
ARDOUR_UI::audition_alert_toggle ()
{
      if (session) {
            session->cancel_audition();
      }
}

void
ARDOUR_UI::solo_alert_toggle ()
{
      if (session) {
            session->set_all_solo (!session->soloing());
      }
}

void
ARDOUR_UI::solo_blink (bool onoff)
{
      if (session == 0) {
            return;
      }
      
      if (session->soloing()) {
            if (onoff) {
                  solo_alert_button.set_state (STATE_ACTIVE);
            } else {
                  solo_alert_button.set_state (STATE_NORMAL);
            }
      } else {
            solo_alert_button.set_active (false);
            solo_alert_button.set_state (STATE_NORMAL);
      }
}

void
ARDOUR_UI::audition_blink (bool onoff)
{
      if (session == 0) {
            return;
      }
      
      if (session->is_auditioning()) {
            if (onoff) {
                  auditioning_alert_button.set_state (STATE_ACTIVE);
            } else {
                  auditioning_alert_button.set_state (STATE_NORMAL);
            }
      } else {
            auditioning_alert_button.set_active (false);
            auditioning_alert_button.set_state (STATE_NORMAL);
      }
}

void
ARDOUR_UI::build_shuttle_context_menu ()
{
      using namespace Menu_Helpers;

      shuttle_context_menu = new Menu();
      MenuList& items = shuttle_context_menu->items();

      Menu* speed_menu = manage (new Menu());
      MenuList& speed_items = speed_menu->items();

      RadioMenuItem::Group group;

      speed_items.push_back (RadioMenuElem (group, "8", bind (mem_fun (*this, &ARDOUR_UI::set_shuttle_max_speed), 8.0f)));
      if (shuttle_max_speed == 8.0) {
            static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();  
      }
      speed_items.push_back (RadioMenuElem (group, "6", bind (mem_fun (*this, &ARDOUR_UI::set_shuttle_max_speed), 6.0f)));
      if (shuttle_max_speed == 6.0) {
            static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();  
      }
      speed_items.push_back (RadioMenuElem (group, "4", bind (mem_fun (*this, &ARDOUR_UI::set_shuttle_max_speed), 4.0f)));
      if (shuttle_max_speed == 4.0) {
            static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();  
      }
      speed_items.push_back (RadioMenuElem (group, "3", bind (mem_fun (*this, &ARDOUR_UI::set_shuttle_max_speed), 3.0f)));
      if (shuttle_max_speed == 3.0) {
            static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();  
      }
      speed_items.push_back (RadioMenuElem (group, "2", bind (mem_fun (*this, &ARDOUR_UI::set_shuttle_max_speed), 2.0f)));
      if (shuttle_max_speed == 2.0) {
            static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();  
      }
      speed_items.push_back (RadioMenuElem (group, "1.5", bind (mem_fun (*this, &ARDOUR_UI::set_shuttle_max_speed), 1.5f)));
      if (shuttle_max_speed == 1.5) {
            static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();  
      }

      items.push_back (MenuElem (_("Maximum speed"), *speed_menu));
}

void
ARDOUR_UI::show_shuttle_context_menu ()
{
      if (shuttle_context_menu == 0) {
            build_shuttle_context_menu ();
      }

      shuttle_context_menu->popup (1, gtk_get_current_event_time());
}

void
ARDOUR_UI::set_shuttle_max_speed (float speed)
{
      shuttle_max_speed = speed;
}

gint
ARDOUR_UI::shuttle_box_button_press (GdkEventButton* ev)
{
      if (!session) {
            return true;
      }

      if (shuttle_controller_binding_proxy.button_press_handler (ev)) {
            return true;
      }

      if (Keyboard::is_context_menu_event (ev)) {
            show_shuttle_context_menu ();
            return true;
      }

      switch (ev->button) {
      case 1:
            shuttle_box.add_modal_grab ();
            shuttle_grabbed = true;
            mouse_shuttle (ev->x, true);
            break;

      case 2:
      case 3:
            return true;
            break;
      }

      return true;
}

gint
ARDOUR_UI::shuttle_box_button_release (GdkEventButton* ev)
{
      if (!session) {
            return true;
      }
      
      switch (ev->button) {
      case 1:
            mouse_shuttle (ev->x, true);
            shuttle_grabbed = false;
            shuttle_box.remove_modal_grab ();
            if (Config->get_shuttle_behaviour() == Sprung) {
                  if (Config->get_auto_play() || roll_button.get_visual_state()) {
                        shuttle_fract = SHUTTLE_FRACT_SPEED1;                       
                        session->request_transport_speed (1.0);
                        stop_button.set_visual_state (0);
                        roll_button.set_visual_state (1);
                  } else {
                        shuttle_fract = 0;
                        session->request_transport_speed (0.0);
                  }
                  shuttle_box.queue_draw ();
            }
            return true;

      case 2:
            if (session->transport_rolling()) {
                  shuttle_fract = SHUTTLE_FRACT_SPEED1;
                  session->request_transport_speed (1.0);
                  stop_button.set_visual_state (0);
                  roll_button.set_visual_state (1);
            } else {
                  shuttle_fract = 0;
            }
            shuttle_box.queue_draw ();
            return true;

      case 3:
      default:
            return true;

      }

      use_shuttle_fract (true);

      return true;
}

gint
ARDOUR_UI::shuttle_box_scroll (GdkEventScroll* ev)
{
      if (!session) {
            return true;
      }
      
      switch (ev->direction) {
            
      case GDK_SCROLL_UP:
            shuttle_fract += 0.005;
            break;
      case GDK_SCROLL_DOWN:
            shuttle_fract -= 0.005;
            break;
      default:
            /* scroll left/right */
            return false;
      }

      use_shuttle_fract (true);

      return true;
}

gint
ARDOUR_UI::shuttle_box_motion (GdkEventMotion* ev)
{
      if (!session || !shuttle_grabbed) {
            return true;
      }

      return mouse_shuttle (ev->x, false);
}

gint
ARDOUR_UI::mouse_shuttle (double x, bool force)
{
      double half_width = shuttle_box.get_width() / 2.0;
      double distance = x - half_width;

      if (distance > 0) {
            distance = min (distance, half_width);
      } else {
            distance = max (distance, -half_width);
      }

      shuttle_fract = distance / half_width;
      use_shuttle_fract (force);
      return true;
}

void
ARDOUR_UI::set_shuttle_fract (double f)
{
      shuttle_fract = f;
      use_shuttle_fract (false);
}

void
ARDOUR_UI::use_shuttle_fract (bool force)
{
      struct timeval now;
      struct timeval diff;
      
      /* do not attempt to submit a motion-driven transport speed request
         more than once per process cycle.
       */

      gettimeofday (&now, 0);
      timersub (&now, &last_shuttle_request, &diff);

      if (!force && (diff.tv_usec + (diff.tv_sec * 1000000)) < engine->usecs_per_cycle()) {
            return;
      }
      
      last_shuttle_request = now;

      bool neg = (shuttle_fract < 0.0);

      double fract = 1 - sqrt (1 - (shuttle_fract * shuttle_fract)); // Formula A1

      if (neg) {
            fract = -fract;
      }

      session->request_transport_speed (shuttle_max_speed * fract); // Formula A2
      shuttle_box.queue_draw ();
}

gint
ARDOUR_UI::shuttle_box_expose (GdkEventExpose* event)
{
      gint x;
      Glib::RefPtr<Gdk::Window> win (shuttle_box.get_window());

      /* redraw the background */

      win->draw_rectangle (shuttle_box.get_style()->get_bg_gc (shuttle_box.get_state()),
                       true,
                       event->area.x, event->area.y,
                       event->area.width, event->area.height);


      x = (gint) floor ((shuttle_box.get_width() / 2.0) + (0.5 * (shuttle_box.get_width() * shuttle_fract)));

      /* draw line */

      win->draw_line (shuttle_box.get_style()->get_fg_gc (shuttle_box.get_state()),
                  x,
                  0,
                  x,
                  shuttle_box.get_height());
      return true;
}

void
ARDOUR_UI::shuttle_unit_clicked ()
{
      if (shuttle_unit_menu == 0) {
            shuttle_unit_menu = dynamic_cast<Menu*> (ActionManager::get_widget ("/ShuttleUnitPopup"));
      }
      shuttle_unit_menu->popup (1, gtk_get_current_event_time());
}

void
ARDOUR_UI::shuttle_style_changed ()
{
      ustring str = shuttle_style_button.get_active_text ();

      if (str == _("sprung")) {
            Config->set_shuttle_behaviour (Sprung);
      } else if (str == _("wheel")) {
            Config->set_shuttle_behaviour (Wheel);
      }
}

void
ARDOUR_UI::update_speed_display ()
{
      if (!session) {
            if (last_speed_displayed != 0) {
                  speed_display_label.set_text (_("stop"));
                  last_speed_displayed = 0;
            }
            return;
      }

      char buf[32];
      float x = session->transport_speed ();

      if (x != last_speed_displayed) {

            if (x != 0) {
                  if (Config->get_shuttle_units() == Percentage) {
                        snprintf (buf, sizeof (buf), "%.2f", x);
                  } else {
                        if (x < 0) {
                              snprintf (buf, sizeof (buf), "< %.1f", 12.0 * fast_log2 (-x));
                        } else {
                              snprintf (buf, sizeof (buf), "> %.1f", 12.0 * fast_log2 (x));
                        }
                  }
                  speed_display_label.set_text (buf);
            } else {
                  speed_display_label.set_text (_("stop"));
            }

            last_speed_displayed = x;
      }
}     
      
void
ARDOUR_UI::set_transport_sensitivity (bool yn)
{
      ActionManager::set_sensitive (ActionManager::transport_sensitive_actions, yn);
      shuttle_box.set_sensitive (yn);
}

void
ARDOUR_UI::editor_realized ()
{
      Config->map_parameters (mem_fun (*this, &ARDOUR_UI::parameter_changed));

      set_size_request_to_display_given_text (speed_display_box, _("-0.55"), 2, 2);
      const guint32 FUDGE = 25; // Combo's are stupid - they steal space from the entry for the button
      set_size_request_to_display_given_text (shuttle_style_button, _("sprung"), 2+FUDGE, 10);
}

void
ARDOUR_UI::sync_option_changed ()
{
      if (session) {
            ustring txt = sync_option_combo.get_active_text ();
            if (txt.length()) {
                  session->request_slave_source (string_to_slave_source (txt));
            }
      }
}

void
ARDOUR_UI::maximise_editing_space ()
{
      if (!editor) {
            return;
      }

      transport_tearoff->set_visible (false);
      editor->maximise_editing_space ();
}

void
ARDOUR_UI::restore_editing_space ()
{
      if (!editor) {
            return;
      }

      transport_tearoff->set_visible (true);
      editor->restore_editing_space ();
}

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