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time_axis_view.cc

/*
    Copyright (C) 2000 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 <cstdlib>
#include <cmath>
#include <algorithm>
#include <string>
#include <list>

#include <libgnomecanvasmm.h>
#include <libgnomecanvasmm/canvas.h>
#include <libgnomecanvasmm/item.h>

#include <pbd/error.h>

#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/selector.h>
#include <gtkmm2ext/stop_signal.h>

#include <ardour/session.h>
#include <ardour/utils.h>
#include <ardour/ladspa_plugin.h>
#include <ardour/insert.h>
#include <ardour/location.h>

#include "ardour_ui.h"
#include "public_editor.h"
#include "time_axis_view.h"
#include "simplerect.h"
#include "simpleline.h"
#include "selection.h"
#include "keyboard.h"
#include "rgb_macros.h"
#include "utils.h"

#include "i18n.h"

using namespace Gtk;
using namespace Gdk;
using namespace sigc; 
using namespace ARDOUR;
using namespace PBD;
using namespace Editing;
using namespace ArdourCanvas;

const double trim_handle_size = 6.0; /* pixels */

uint32_t TimeAxisView::hLargest = 0;
uint32_t TimeAxisView::hLarge = 0;
uint32_t TimeAxisView::hLarger = 0;
uint32_t TimeAxisView::hNormal = 0;
uint32_t TimeAxisView::hSmaller = 0;
uint32_t TimeAxisView::hSmall = 0;
bool TimeAxisView::need_size_info = true;

TimeAxisView::TimeAxisView (ARDOUR::Session& sess, PublicEditor& ed, TimeAxisView* rent, Canvas& canvas) 
      : AxisView (sess), 
        editor (ed),
        controls_table (2, 8)
{
      if (need_size_info) {
            compute_controls_size_info ();
            need_size_info = false;
      }
      canvas_background = new Group (*ed.get_background_group (), 0.0, 0.0);
      canvas_display = new Group (*ed.get_trackview_group (), 0.0, 0.0);

      selection_group = new Group (*canvas_display);
      selection_group->hide();
      
      control_parent = 0;
      display_menu = 0;
      size_menu = 0;
      _marked_for_display = false;
      _hidden = false;
      height = 0;
      effective_height = 0;
      parent = rent;
      _has_state = false;
      last_name_entry_key_press_event = 0;
      name_packing = NamePackingBits (0);
      resize_drag_start = -1;

      /*
        Create the standard LHS Controls
        We create the top-level container and name add the name label here,
        subclasses can add to the layout as required
      */

      name_entry.set_name ("EditorTrackNameDisplay");
      name_entry.signal_button_release_event().connect (mem_fun (*this, &TimeAxisView::name_entry_button_release));
      name_entry.signal_button_press_event().connect (mem_fun (*this, &TimeAxisView::name_entry_button_press));
      name_entry.signal_key_release_event().connect (mem_fun (*this, &TimeAxisView::name_entry_key_release));
      name_entry.signal_activate().connect (mem_fun(*this, &TimeAxisView::name_entry_activated));
      name_entry.signal_focus_in_event().connect (mem_fun (*this, &TimeAxisView::name_entry_focus_in));
      name_entry.signal_focus_out_event().connect (mem_fun (*this, &TimeAxisView::name_entry_focus_out));
      Gtkmm2ext::set_size_request_to_display_given_text (name_entry, N_("gTortnam"), 10, 10); // just represents a short name

      name_label.set_name ("TrackLabel");
      name_label.set_alignment (0.0, 0.5);

      /* typically, either name_label OR name_entry are visible,
         but not both. its up to derived classes to show/hide them as they
         wish.
      */

      name_hbox.show ();

      controls_table.set_border_width (2);
      controls_table.set_row_spacings (0);
      controls_table.set_col_spacings (0);
      controls_table.set_homogeneous (true);

      controls_table.attach (name_hbox, 0, 5, 0, 1,  Gtk::FILL|Gtk::EXPAND,  Gtk::FILL|Gtk::EXPAND, 3, 0);
      controls_table.show_all ();
      controls_table.set_no_show_all ();

      resizer.set_size_request (10, 10);
      resizer.set_name ("ResizeHandle");
      resizer.signal_expose_event().connect (mem_fun (*this, &TimeAxisView::resizer_expose));
      resizer.signal_button_press_event().connect (mem_fun (*this, &TimeAxisView::resizer_button_press));
      resizer.signal_button_release_event().connect (mem_fun (*this, &TimeAxisView::resizer_button_release));
      resizer.set_events (Gdk::BUTTON_PRESS_MASK|
                      Gdk::BUTTON_RELEASE_MASK|
                      Gdk::POINTER_MOTION_MASK|
                      Gdk::SCROLL_MASK);

      resizer_box.pack_start (resizer, false, false);
      resizer.show ();
      resizer_box.show();

      controls_vbox.pack_start (controls_table, false, false);
      controls_vbox.pack_end (resizer_box, false, true);
      controls_vbox.show ();

      controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
      controls_ebox.add (controls_vbox);
      controls_ebox.add_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK|SCROLL_MASK);
      controls_ebox.set_flags (CAN_FOCUS);

      controls_ebox.signal_button_release_event().connect (mem_fun (*this, &TimeAxisView::controls_ebox_button_release));
      controls_ebox.signal_scroll_event().connect (mem_fun (*this, &TimeAxisView::controls_ebox_scroll), true);

      controls_hbox.pack_start (controls_ebox,true,true);
      controls_hbox.show ();

      controls_frame.add (controls_hbox);
      controls_frame.set_name ("TimeAxisViewControlsBaseUnselected");
      controls_vbox.set_name ("TimeAxisViewControlsBaseUnselected");
      controls_frame.set_shadow_type (Gtk::SHADOW_ETCHED_OUT);
}

TimeAxisView::~TimeAxisView()
{
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            delete *i;
      }

      for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
            delete (*i)->rect;
            delete (*i)->start_trim;
            delete (*i)->end_trim;

      }

      for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
            delete (*i)->rect;
            delete (*i)->start_trim;
            delete (*i)->end_trim;
      }

      for (list<SimpleLine*>::iterator i = feature_lines.begin(); i != feature_lines.end(); ++i) {
            delete (*i);
      }

      if (selection_group) {
            delete selection_group;
            selection_group = 0;
      }

      if (canvas_background) {
            delete canvas_background;
            canvas_background = 0;
      }

      if (canvas_display) {
            delete canvas_display;
            canvas_display = 0;
      }

      if (display_menu) {
            delete display_menu;
            display_menu = 0;
      }
}

guint32
00214 TimeAxisView::show_at (double y, int& nth, VBox *parent)
{
      if (control_parent) {
            control_parent->reorder_child (controls_frame, nth);
      } else {    
            control_parent = parent;
            parent->pack_start (controls_frame, false, false);
            parent->reorder_child (controls_frame, nth);
      }

      order = nth;

      if (y_position != y) {
            canvas_display->property_y () = y;
            canvas_background->property_y () = y;
            /* silly canvas */
            canvas_display->move (0.0, 0.0);
            canvas_background->move (0.0, 0.0);
            y_position = y;
      }

      canvas_background->raise_to_top ();
      canvas_display->raise_to_top ();

      if (_marked_for_display) {
            controls_frame.show ();
            controls_ebox.show ();
            canvas_background->show ();
      }

      _hidden = false;
      
      effective_height = current_height();

      /* now show children */
      
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            
            if (canvas_item_visible ((*i)->canvas_display)) {
                  ++nth;
                  effective_height += (*i)->show_at (y + effective_height, nth, parent);
            }
      }

      return effective_height;
}

void
TimeAxisView::clip_to_viewport ()
{
      if (_marked_for_display) {
            if (y_position  +  effective_height < editor.get_trackview_group_vertical_offset () || y_position > editor.get_trackview_group_vertical_offset () + canvas_display->get_canvas()->get_height()) {
                  canvas_background->hide ();
                  canvas_display->hide ();
                  return;
            }
            canvas_background->show();
            canvas_display->show ();
      }
      return;
}

bool
TimeAxisView::controls_ebox_scroll (GdkEventScroll* ev)
{
      switch (ev->direction) {
      case GDK_SCROLL_UP:
            if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
                  step_height (true);
                  return true;
            } else if (Keyboard::no_modifiers_active (ev->state)) {
                  editor.scroll_tracks_up_line();
                  return true;
            }
            break;
            
      case GDK_SCROLL_DOWN:
            if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
                  step_height (false);
                  return true;
            } else if (Keyboard::no_modifiers_active (ev->state)) {
                  editor.scroll_tracks_down_line();
                  return true;
            }
            break;

      default:
            /* no handling for left/right, yet */
            break;
      }

      return false;
}

bool
00309 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
{
      switch (ev->button) {
      case 1:
            selection_click (ev);
            break;

      case 3:
            popup_display_menu (ev->time);
            break;
      }

      return true;
}

void
TimeAxisView::selection_click (GdkEventButton* ev)
{
      Selection::Operation op = Keyboard::selection_type (ev->state);
      editor.set_selected_track (*this, op, false);
}

void
00332 TimeAxisView::hide ()
{
      if (_hidden) {
            return;
      }

      canvas_display->hide();
      canvas_background->hide();
      controls_frame.hide ();

      if (control_parent) {
            control_parent->remove (controls_frame);
            control_parent = 0;
      }

      y_position = -1;
      _hidden = true;
      
      /* now hide children */
      
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->hide ();
      }

      /* if its hidden, it cannot be selected */

      editor.get_selection().remove (this);
      
      Hiding ();
}

void
00364 TimeAxisView::step_height (bool bigger)
{
      static const uint32_t step = 20;

      if (bigger) {
            set_height (height + step);
      } else {
            if (height > step) {
                  set_height (std::max (height - step, hSmall));
            } else if (height != hSmall) {
                  set_height (hSmall);
            }
      }
}

void
TimeAxisView::set_heights (uint32_t h)
{
      TrackSelection& ts (editor.get_selection().tracks);

      for (TrackSelection::iterator i = ts.begin(); i != ts.end(); ++i) {
            (*i)->set_height (h);
      }
}

void
TimeAxisView::set_height(uint32_t h)
{
      if (h == height) {
            return;
      }
      height = h;
      controls_frame.property_height_request () = h;

      if (canvas_item_visible (selection_group)) {
            /* resize the selection rect */
            show_selection (editor.get_selection().time);
      }

      reshow_feature_lines ();
}

bool
TimeAxisView::name_entry_key_release (GdkEventKey* ev)
{
      PublicEditor::TrackViewList *allviews = 0;
      PublicEditor::TrackViewList::iterator i;

      switch (ev->keyval) {
      case GDK_Escape:
            name_entry.select_region (0,0);
            controls_ebox.grab_focus ();
            name_entry_changed ();
            return true;

      /* Shift+Tab Keys Pressed. Note that for Shift+Tab, GDK actually
       * generates a different ev->keyval, rather than setting 
       * ev->state.
       */
      case GDK_ISO_Left_Tab:
      case GDK_Tab:
            name_entry_changed ();
            allviews = editor.get_valid_views (0);
            if (allviews != 0) {
                  i = find (allviews->begin(), allviews->end(), this);
                  if (ev->keyval == GDK_Tab) {
                        if (i != allviews->end()) {
                              do {
                                    if (++i == allviews->end()) { return true; }
                              } while((*i)->hidden());
                        }
                  } else {
                        if (i != allviews->begin()) {
                              do {
                                    if (--i == allviews->begin()) { return true; }
                              } while ((*i)->hidden());
                        }
                  }


                  /* resize to show editable name display */
                  
                  if ((*i)->current_height() >= hSmall && (*i)->current_height() < hNormal) {
                        (*i)->set_height (hSmaller);
                  }
                  
                  (*i)->name_entry.grab_focus();
            }
            return true;

      case GDK_Up:
      case GDK_Down:
            name_entry_changed ();
            return true;

      default:
            break;
      }

#ifdef TIMEOUT_NAME_EDIT      
      /* adapt the timeout to reflect the user's typing speed */

      guint32 name_entry_timeout;

      if (last_name_entry_key_press_event) {
            /* timeout is 1/2 second or 5 times their current inter-char typing speed */
            name_entry_timeout = std::max (500U, (5 * (ev->time - last_name_entry_key_press_event)));
      } else {
            /* start with a 1 second timeout */
            name_entry_timeout = 1000;
      }

      last_name_entry_key_press_event = ev->time;

      /* wait 1 seconds and if no more keys are pressed, act as if they pressed enter */

      name_entry_key_timeout.disconnect();
      name_entry_key_timeout = Glib::signal_timeout().connect (mem_fun (*this, &TimeAxisView::name_entry_key_timed_out), name_entry_timeout);
#endif

      return false;
}

bool
TimeAxisView::name_entry_focus_in (GdkEventFocus* ev)
{
      name_entry.select_region (0, -1);
      name_entry.set_name ("EditorActiveTrackNameDisplay");
      return false;
}

bool
TimeAxisView::name_entry_focus_out (GdkEventFocus* ev)
{
      /* clean up */

      last_name_entry_key_press_event = 0;
      name_entry_key_timeout.disconnect ();
      name_entry.set_name ("EditorTrackNameDisplay");
      name_entry.select_region (0,0);
      
      /* do the real stuff */

      name_entry_changed ();

      return false;
}

bool
TimeAxisView::name_entry_key_timed_out ()
{
      name_entry_activated();
      return false;
}

void
TimeAxisView::name_entry_activated ()
{
      controls_ebox.grab_focus();
}

void
TimeAxisView::name_entry_changed ()
{
}

bool
TimeAxisView::name_entry_button_press (GdkEventButton *ev)
{
      if (ev->button == 3) {
            return true;
      }
      return false;
}

bool
TimeAxisView::name_entry_button_release (GdkEventButton *ev)
{
      if (ev->button == 3) {
            popup_display_menu (ev->time);
            return true;
      }
      return false;
}

void
TimeAxisView::conditionally_add_to_selection ()
{
      Selection& s (editor.get_selection());

      if (!s.selected (this)) {
            editor.set_selected_track (*this, Selection::Set);
      }
}


void
00561 TimeAxisView::popup_display_menu (guint32 when)
{
      if (display_menu == 0) {
            build_display_menu ();
      }

      conditionally_add_to_selection ();
      display_menu->popup (1, when);      
}

gint
00572 TimeAxisView::size_click (GdkEventButton *ev)
{
      conditionally_add_to_selection ();
      popup_size_menu (ev->time);
      return TRUE;
}

void
00580 TimeAxisView::popup_size_menu (guint32 when)
{
      if (size_menu == 0) {
            build_size_menu ();
      }
      size_menu->popup (1, when);
}

void
TimeAxisView::show_selected (Selection &selection)
{
      //give children a chance to be selected
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->show_selected (selection);
      }

      //determine if I am in the selection
      bool selected = false;
      if (find (selection.tracks.begin(), selection.tracks.end(), this) != selection.tracks.end()) {
            selected = true;
      }

      //bail out here if my state is unchanged
      if (selected == _selected) {
            return;
      }
      
      Selectable::set_selected (selected);

      if (_selected) {
            controls_ebox.set_name (controls_base_selected_name);
            controls_frame.set_name (controls_base_selected_name);
            controls_vbox.set_name (controls_base_selected_name);

            /* propagate any existing selection, if the mode is right */
            if (editor.current_mouse_mode() == Editing::MouseRange && !editor.get_selection().time.empty()) {
                  show_selection (editor.get_selection().time);
            }

      } else {
            controls_ebox.set_name (controls_base_unselected_name);
            controls_frame.set_name (controls_base_unselected_name);
            controls_vbox.set_name (controls_base_unselected_name);
            hide_selection ();
      }

      resizer.queue_draw ();
}

void
00630 TimeAxisView::build_size_menu ()
{
      using namespace Menu_Helpers;

      size_menu = new Menu;
      size_menu->set_name ("ArdourContextMenu");
      MenuList& items = size_menu->items();
      
      items.push_back (MenuElem (_("Largest"), bind (mem_fun (*this, &TimeAxisView::set_heights), hLargest)));
      items.push_back (MenuElem (_("Large"), bind (mem_fun (*this, &TimeAxisView::set_heights), hLarge)));
      items.push_back (MenuElem (_("Larger"), bind (mem_fun (*this, &TimeAxisView::set_heights), hLarger)));
      items.push_back (MenuElem (_("Normal"), bind (mem_fun (*this, &TimeAxisView::set_heights), hNormal)));
      items.push_back (MenuElem (_("Smaller"), bind (mem_fun (*this, &TimeAxisView::set_heights),hSmaller)));
      items.push_back (MenuElem (_("Small"), bind (mem_fun (*this, &TimeAxisView::set_heights), hSmall)));
}

void
00647 TimeAxisView::build_display_menu ()
{
      using namespace Menu_Helpers;

      display_menu = new Menu;
      display_menu->set_name ("ArdourContextMenu");

      // Just let implementing classes define what goes into the manu
}

void
TimeAxisView::set_samples_per_unit (double spu)
{
      AnalysisFeatureList::const_iterator i;
      list<ArdourCanvas::SimpleLine*>::iterator l;

      for (i = analysis_features.begin(), l = feature_lines.begin(); i != analysis_features.end() && l != feature_lines.end(); ++i, ++l) {
            (*l)->property_x1() = editor.frame_to_pixel (*i);
            (*l)->property_x2() = editor.frame_to_pixel (*i);
      }
      
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->set_samples_per_unit (spu);
      }
}

void
TimeAxisView::show_timestretch (nframes_t start, nframes_t end)
{
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->show_timestretch (start, end);
      }
}

void
TimeAxisView::hide_timestretch ()
{
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->hide_timestretch ();
      }
}

void
TimeAxisView::show_selection (TimeSelection& ts)
{
      double x1;
      double x2;
      double y2;
      SelectionRect *rect;

      if (canvas_item_visible (selection_group)) {
            while (!used_selection_rects.empty()) {
                  free_selection_rects.push_front (used_selection_rects.front());
                  used_selection_rects.pop_front();
                  free_selection_rects.front()->rect->hide();
                  free_selection_rects.front()->start_trim->hide();
                  free_selection_rects.front()->end_trim->hide();
            }
            selection_group->hide();
      }

      selection_group->show();
      selection_group->raise_to_top();
      
      for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
            nframes_t start, end, cnt;

            start = (*i).start;
            end = (*i).end;
            cnt = end - start + 1;

            rect = get_selection_rect ((*i).id);
            
            x1 = editor.frame_to_unit (start);
            x2 = editor.frame_to_unit (start + cnt - 1);
            y2 = current_height();

            rect->rect->property_x1() = x1;
            rect->rect->property_y1() = 1.0;
            rect->rect->property_x2() = x2;
            rect->rect->property_y2() = y2;
            
            // trim boxes are at the top for selections
            
            if (x2 > x1) {
                  rect->start_trim->property_x1() = x1;
                  rect->start_trim->property_y1() = 1.0;
                  rect->start_trim->property_x2() = x1 + trim_handle_size;
                  rect->start_trim->property_y2() = 1.0 + trim_handle_size;

                  rect->end_trim->property_x1() = x2 - trim_handle_size;
                  rect->end_trim->property_y1() = 1.0;
                  rect->end_trim->property_x2() = x2;
                  rect->end_trim->property_y2() = 1.0 + trim_handle_size;

                  rect->start_trim->show();
                  rect->end_trim->show();
            } else {
                  rect->start_trim->hide();
                  rect->end_trim->hide();
            }

            rect->rect->show ();
            used_selection_rects.push_back (rect);
      }
}

void
TimeAxisView::reshow_selection (TimeSelection& ts)
{
      show_selection (ts);

      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->show_selection (ts);
      }
}

void
TimeAxisView::hide_selection ()
{
      if (canvas_item_visible (selection_group)) {
            while (!used_selection_rects.empty()) {
                  free_selection_rects.push_front (used_selection_rects.front());
                  used_selection_rects.pop_front();
                  free_selection_rects.front()->rect->hide();
                  free_selection_rects.front()->start_trim->hide();
                  free_selection_rects.front()->end_trim->hide();
            }
            selection_group->hide();
      }
      
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->hide_selection ();
      }
}

void
TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on_top)
{
      /* find the selection rect this is for. we have the item corresponding to one
         of the trim handles.
       */

      for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
            if ((*i)->start_trim == item || (*i)->end_trim == item) {
                  
                  /* make one trim handle be "above" the other so that if they overlap,
                     the top one is the one last used.
                  */
                  
                  (*i)->rect->raise_to_top ();
                  (put_start_on_top ? (*i)->start_trim : (*i)->end_trim)->raise_to_top ();
                  (put_start_on_top ? (*i)->end_trim : (*i)->start_trim)->raise_to_top ();
                  
                  break;
            }
      }
}

SelectionRect *
TimeAxisView::get_selection_rect (uint32_t id)
{
      SelectionRect *rect;

      /* check to see if we already have a visible rect for this particular selection ID */

      for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
            if ((*i)->id == id) {
                  return (*i);
            }
      }

      /* ditto for the free rect list */

      for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
            if ((*i)->id == id) {
                  SelectionRect* ret = (*i);
                  free_selection_rects.erase (i);
                  return ret;
            }
      }

      /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
      
      if (free_selection_rects.empty()) {

            rect = new SelectionRect;

            rect->rect = new SimpleRect (*selection_group);
            rect->rect->property_x1() = 0.0;
            rect->rect->property_y1() = 0.0;
            rect->rect->property_x2() = 0.0;
            rect->rect->property_y2() = 0.0;
            rect->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
            rect->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
            
            rect->start_trim = new SimpleRect (*selection_group);
            rect->start_trim->property_x1() = 0.0;
            rect->start_trim->property_x2() = 0.0;
            rect->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            rect->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            
            rect->end_trim = new SimpleRect (*selection_group);
            rect->end_trim->property_x1() = 0.0;
            rect->end_trim->property_x2() = 0.0;
            rect->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            rect->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();

            free_selection_rects.push_front (rect);

            rect->rect->signal_event().connect (bind (mem_fun (editor, &PublicEditor::canvas_selection_rect_event), rect->rect, rect));
            rect->start_trim->signal_event().connect (bind (mem_fun (editor, &PublicEditor::canvas_selection_start_trim_event), rect->rect, rect));
            rect->end_trim->signal_event().connect (bind (mem_fun (editor, &PublicEditor::canvas_selection_end_trim_event), rect->rect, rect));
      } 

      rect = free_selection_rects.front();
      rect->id = id;
      free_selection_rects.pop_front();
      return rect;
}

bool
TimeAxisView::is_child (TimeAxisView* tav)
{
      return find (children.begin(), children.end(), tav) != children.end();
}

void
TimeAxisView::add_child (TimeAxisView* child)
{
      children.push_back (child);
}

void
TimeAxisView::remove_child (TimeAxisView* child)
{
      vector<TimeAxisView*>::iterator i;

      if ((i = find (children.begin(), children.end(), child)) != children.end()) {
            children.erase (i);
      }
}

void
TimeAxisView::get_selectables (nframes_t start, nframes_t end, double top, double bot, list<Selectable*>& result)
{
      return;
}

void
TimeAxisView::get_inverted_selectables (Selection& sel, list<Selectable*>& result)
{
      return;
}

bool
TimeAxisView::touched (double top, double bot)
{
      /* remember: this is X Window - coordinate space starts in upper left and moves down.
         y_position is the "origin" or "top" of the track.
       */

      double mybot = y_position + current_height();
      
      return ((y_position <= bot && y_position >= top) || 
            ((mybot <= bot) && (top < mybot)) || 
            (mybot >= bot && y_position < top));
}           

void
TimeAxisView::set_parent (TimeAxisView& p)
{
      parent = &p;
}

bool
TimeAxisView::has_state () const
{
      return _has_state;
}

TimeAxisView*
TimeAxisView::get_parent_with_state ()
{
      if (parent == 0) {
            return 0;
      }

      if (parent->has_state()) {
            return parent;
      } 

      return parent->get_parent_with_state ();
}           


XMLNode&
TimeAxisView::get_state ()
{
      XMLNode* node = new XMLNode ("TAV-" + name());
      char buf[32];

      snprintf (buf, sizeof(buf), "%u", height);
      node->add_property ("height", buf);
      node->add_property ("marked_for_display", (_marked_for_display ? "1" : "0"));
      return *node;
}

int
TimeAxisView::set_state (const XMLNode& node)
{
      const XMLProperty *prop;

      if ((prop = node.property ("marked_for_display")) != 0) {
            _marked_for_display = (prop->value() == "1");
      }

      if ((prop = node.property ("track_height")) != 0) {

            if (prop->value() == "largest") {
                  set_height (hLargest);
            } else if (prop->value() == "large") {
                  set_height (hLarge);
            } else if (prop->value() == "larger") {
                  set_height (hLarger);
            } else if (prop->value() == "normal") {
                  set_height (hNormal);
            } else if (prop->value() == "smaller") {
                  set_height (hSmaller);
            } else if (prop->value() == "small") {
                  set_height (hSmall);
            } else {
                  error << string_compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
                  set_height (Normal);
            }

      } else if ((prop = node.property ("height")) != 0) {

            set_height (atoi (prop->value()));
            
      } else {

            set_height (hNormal);
      }

      return 0;
}

void
TimeAxisView::reset_height()
{
      set_height (height);

      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->set_height ((*i)->height);
      }
}
      
void
TimeAxisView::compute_controls_size_info ()
{
      Gtk::Window window (Gtk::WINDOW_TOPLEVEL);
      Gtk::Table two_row_table (2, 8);
      Gtk::Table one_row_table (1, 8);
      Button* buttons[5];
      const int border_width = 2;
      const int extra_height = (2 * border_width) + 2 // 2 pixels for the controls frame
            + 10; // resizer button

      window.add (one_row_table);

      one_row_table.set_border_width (border_width);
      one_row_table.set_row_spacings (0);
      one_row_table.set_col_spacings (0);
      one_row_table.set_homogeneous (true);

      two_row_table.set_border_width (border_width);
      two_row_table.set_row_spacings (0);
      two_row_table.set_col_spacings (0);
      two_row_table.set_homogeneous (true);

      for (int i = 0; i < 5; ++i) {
            buttons[i] = manage (new Button (X_("f")));
            buttons[i]->set_name ("TrackMuteButton");
      }

      one_row_table.attach (*buttons[0], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
      
      one_row_table.show_all ();
      Gtk::Requisition req(one_row_table.size_request ());


      // height required to show 1 row of buttons

      hSmaller = req.height + extra_height;

      window.remove ();
      window.add (two_row_table);

      two_row_table.attach (*buttons[1], 5, 6, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
      two_row_table.attach (*buttons[2], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
      two_row_table.attach (*buttons[3], 7, 8, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
      two_row_table.attach (*buttons[4], 8, 9, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);

      two_row_table.show_all ();
      req = two_row_table.size_request ();

      // height required to show all normal buttons 

      hNormal = req.height + extra_height;

      // these heights are all just larger than normal. no more 
      // elements are visible (yet).

      hLarger = hNormal + 50;
      hLarge = hNormal + 150;
      hLargest = hNormal + 250;

      // height required to show track name

      hSmall = 27;
}

void
TimeAxisView::show_name_label ()
{
      if (!(name_packing & NameLabelPacked)) {
            name_hbox.pack_start (name_label, true, true);
            name_packing = NamePackingBits (name_packing | NameLabelPacked);
            name_hbox.show ();
            name_label.show ();
      }
}

void
TimeAxisView::show_name_entry ()
{
      if (!(name_packing & NameEntryPacked)) {
            name_hbox.pack_start (name_entry, true, true);
            name_packing = NamePackingBits (name_packing | NameEntryPacked);
            name_hbox.show ();
            name_entry.show ();
      }
}

void
TimeAxisView::hide_name_label ()
{
      if (name_packing & NameLabelPacked) {
            name_hbox.remove (name_label);
            name_packing = NamePackingBits (name_packing & ~NameLabelPacked);
      }
}

void
TimeAxisView::hide_name_entry ()
{
      if (name_packing & NameEntryPacked) {
            name_hbox.remove (name_entry);
            name_packing = NamePackingBits (name_packing & ~NameEntryPacked);
      }
}

void
TimeAxisView::color_handler ()
{
      for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {

            (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
            (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();

            (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();

            (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
      }

      for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {

            (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
            (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();

            (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();

            (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
            (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
      }
}

TimeAxisView*
01139 TimeAxisView::covers_y_position (double y)
{
      if (hidden()) {
            return 0;
      }

      if (y_position <= y && y < (y_position + height)) {
            return this;
      }

      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            TimeAxisView* tv;

            if ((tv = (*i)->covers_y_position (y)) != 0) {
                  return tv;
            }
      }

      return 0;
}

void
TimeAxisView::show_feature_lines (const AnalysisFeatureList& pos)
{
      analysis_features = pos;
      reshow_feature_lines ();
}


void
TimeAxisView::hide_feature_lines ()
{
      list<ArdourCanvas::SimpleLine*>::iterator l;

      for (l = feature_lines.begin(); l != feature_lines.end(); ++l) {
            (*l)->hide();
      }
}

void
TimeAxisView::reshow_feature_lines ()
{
      while (feature_lines.size()< analysis_features.size()) {
            ArdourCanvas::SimpleLine* l = new ArdourCanvas::SimpleLine (*canvas_display);
            l->property_color_rgba() = (guint) ARDOUR_UI::config()->canvasvar_ZeroLine.get();
            feature_lines.push_back (l);
      }

      while (feature_lines.size() > analysis_features.size()) {
            ArdourCanvas::SimpleLine *line = feature_lines.back();
            feature_lines.pop_back ();
            delete line;
      }

      AnalysisFeatureList::const_iterator i;
      list<ArdourCanvas::SimpleLine*>::iterator l;

      for (i = analysis_features.begin(), l = feature_lines.begin(); i != analysis_features.end() && l != feature_lines.end(); ++i, ++l) {
            (*l)->property_x1() = editor.frame_to_pixel (*i);
            (*l)->property_x2() = editor.frame_to_pixel (*i);
            (*l)->property_y1() = 0;
            (*l)->property_y2() = current_height();
            (*l)->show ();
      }
}

bool
TimeAxisView::resizer_button_press (GdkEventButton* event)
{
      resize_drag_start = event->y_root;
      resize_idle_target = current_height();
      if (resizer_motion_signal) {
            resizer_motion_signal.disconnect ();
      }
      resizer_motion_signal = resizer.signal_motion_notify_event().connect (mem_fun (*this, &TimeAxisView::resizer_motion));
      return true;
}

bool
TimeAxisView::resizer_button_release (GdkEventButton* ev)
{
      resize_drag_start = -1;
      resizer_motion_signal.disconnect ();
      return true;
}

void
TimeAxisView::idle_resize (uint32_t h)
{
      set_height (h);
}

bool
TimeAxisView::resizer_motion (GdkEventMotion* ev)
{
      if (resize_drag_start < 0) {
            return true;
      }

      int32_t delta = (int32_t) floor (resize_drag_start - ev->y_root);
      int32_t target = resize_idle_target - delta;

      resize_idle_target = std::max (target, (int) hSmall);
      editor.add_to_idle_resize (this, resize_idle_target);
      if (target >= (int) hSmall ) {
            resize_drag_start = ev->y_root;
      }

      return true;
}

bool
TimeAxisView::resizer_expose (GdkEventExpose* event)
{
      int w, h, x, y, d;
      Glib::RefPtr<Gdk::Window> win (resizer.get_window());
      Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
      Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));

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

      win->get_geometry (x, y, w, h, d);

      /* handle/line #1 */
      
      win->draw_line (dark, 0, 0, w - 2, 0);
      win->draw_point (dark, 0, 1);
      win->draw_line (light, 1, 1, w - 1, 1);
      win->draw_point (light, w - 1, 0);

      /* handle/line #2 */

      win->draw_line (dark, 0, 4, w - 2, 4);
      win->draw_point (dark, 0, 5);
      win->draw_line (light, 1, 5, w - 1, 5);
      win->draw_point (light, w - 1, 4);

      /* handle/line #3 */

      win->draw_line (dark, 0, 8, w - 2, 8);
      win->draw_point (dark, 0, 9);
      win->draw_line (light, 1, 9, w - 1, 9);
      win->draw_point (light, w - 1, 8);

      /* use vertical resize mouse cursor */
      win->set_cursor(Gdk::Cursor(Gdk::SB_V_DOUBLE_ARROW));

      return true;
}


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