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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.

    $Id: time_axis_view.cc,v 1.42 2005/05/05 19:38:55 pauld Exp $
*/

#include <cstdlib>
#include <cmath>
#include <algorithm>
#include <string>
#include <list>

#include <pbd/error.h>

#include <gtkmmext/utils.h>
#include <gtkmmext/selector.h>
#include <gtkmmext/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 "canvas-simplerect.h"
#include "selection.h"
#include "keyboard.h"
#include "rgb_macros.h"

#include "i18n.h"

using namespace Gtk;
using namespace SigC;
using namespace ARDOUR;
using namespace Editing;

const double trim_handle_size = 6.0; /* pixels */

TimeAxisView::TimeAxisView(ARDOUR::Session& sess, PublicEditor& ed, TimeAxisView* rent, Gtk::Widget *canvas) 
      : AxisView(sess), 
        editor(ed),
        controls_table (2, 9)
{
      canvas_display = gtk_canvas_item_new (gtk_canvas_root(GTK_CANVAS(canvas->gtkobj())),
                                    gtk_canvas_group_get_type(),
                                    "x", 0.0,
                                    "y", 0.0,
                                    NULL);

      selection_group = gtk_canvas_item_new (GTK_CANVAS_GROUP(canvas_display), 
                                     gtk_canvas_group_get_type (), 
                                     NULL);
      gtk_canvas_item_hide (selection_group);
      
      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;

      /*
        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.button_release_event.connect (slot (*this, &TimeAxisView::name_entry_button_release));
      name_entry.button_press_event.connect (slot (*this, &TimeAxisView::name_entry_button_press));
      
      name_entry.focus_in_event.connect (slot (ARDOUR_UI::generic_focus_in_event));
      name_entry.focus_out_event.connect (slot (ARDOUR_UI::generic_focus_out_event));

      Gtkmmext::set_usize_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);

      // name_hbox.set_border_width (2);
      // name_hbox.set_spacing (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.pack_start (name_label, true, true);
      name_hbox.pack_start (name_entry, true, true);
      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.show ();

      controls_table.attach (name_hbox, 0, 5, 0, 1, GTK_FILL|GTK_EXPAND, GTK_FILL|GTK_EXPAND);

      controls_table.show ();

      controls_vbox.pack_start (controls_table, false, false);
      controls_vbox.show ();

      controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
      controls_ebox.add (controls_vbox);
      controls_ebox.add_events (GDK_BUTTON_PRESS_MASK|GDK_BUTTON_RELEASE_MASK);
      controls_ebox.set_flags (GTK_CAN_FOCUS);

      controls_ebox.button_release_event.connect (slot (*this, &TimeAxisView::controls_ebox_button_release));
      
      controls_lhs_pad.set_name ("TimeAxisViewControlsPadding");
      controls_hbox.pack_start (controls_lhs_pad,false,false);
      controls_hbox.pack_start (controls_ebox,true,true);
      controls_hbox.show ();

      controls_frame.add (controls_hbox);
      controls_frame.set_name ("TimeAxisViewControlsBaseUnselected");
      controls_frame.set_shadow_type (GTK_SHADOW_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) {
            gtk_object_destroy (GTK_OBJECT((*i)->rect));
            gtk_object_destroy (GTK_OBJECT((*i)->start_trim));
            gtk_object_destroy (GTK_OBJECT((*i)->end_trim));
      }

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

      if (selection_group) {
            gtk_object_destroy (GTK_OBJECT (selection_group));
            selection_group = 0;
      }

      if (canvas_display) {
            gtk_object_destroy (GTK_OBJECT (canvas_display));     
            canvas_display = 0;
      }

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

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

guint32
00182 TimeAxisView::show_at (double y, int& nth, VBox *parent)
{
      gdouble ix1, ix2, iy1, iy2;
      effective_height = 0;

      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);
      }

      controls_frame.show ();
      controls_ebox.show ();

      /* the coordinates used here are in the system of the
         item's parent ...
      */

      gtk_canvas_item_get_bounds (canvas_display, &ix1, &iy1, &ix2, &iy2);
      gtk_canvas_item_i2w (canvas_display->parent, &ix1, &iy1);
      if (iy1 < 0) {
            iy1 = 0;
      }
      gtk_canvas_item_move (canvas_display, 0.0, y - iy1);
      gtk_canvas_item_show (canvas_display); /* XXX not necessary */

      y_position = y;
      order = nth;
      _hidden = false;
      
      effective_height = height;

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

      return effective_height;
}

gint
00234 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
{
      switch (ev->button) {
      case 1:
            selection_click (ev);
            break;

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

      case 4:
            if (Keyboard::no_modifier_keys_pressed (ev)) {
                  editor.scroll_tracks_up_line ();
            } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
                  step_height (true);
            }
            break;

      case 5:
            if (Keyboard::no_modifier_keys_pressed (ev)) {
                  editor.scroll_tracks_down_line ();
            } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
                  step_height (false);
            }
            break;
            

      }

      return TRUE;
}

void
TimeAxisView::selection_click (GdkEventButton* ev)
{
      if (Keyboard::modifier_state_contains (ev->state, Keyboard::Shift)) {

            if (editor.get_selection().selected (this)) {
                  editor.get_selection().remove (this);
            } else {
                  editor.get_selection().add (this);
            }

      } else {

            editor.get_selection().set (this);
      }
}

void
00285 TimeAxisView::hide ()
{
      if (_hidden) {
            return;
      }

      gtk_canvas_item_hide (canvas_display);
      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 ();
      }
      
      Hiding ();
}

void
00312 TimeAxisView::step_height (bool bigger)
{
      switch (height) {
      case Largest:
            if (!bigger) set_height (Large);
            break;
      case Large:
            if (bigger) set_height (Largest);
            else set_height (Larger);
            break;
      case Larger:
            if (bigger) set_height (Large);
            else set_height (Normal);
            break;
      case Normal:
            if (bigger) set_height (Larger);
            else set_height (Smaller);
            break;
      case Smaller:
            if (bigger) set_height (Normal);
            else set_height (Small);
            break;
      case Small:
            if (bigger) set_height (Smaller);
            break;
      }
}


void
00342 TimeAxisView::set_height (TrackHeight h)
{
      height = (guint32) h;
      controls_frame.set_usize (-1, height);

      if (GTK_OBJECT_FLAGS(GTK_OBJECT(selection_group)) & GTK_CANVAS_ITEM_VISIBLE) {
            /* resize the selection rect */
            show_selection (editor.get_selection().time);
      }

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

}


gint
00360 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
{
      if (ev->button == 3) {
            return do_not_propagate (ev);
      }
      return FALSE;
}

gint
00369 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
{
      if (ev->button == 3) {
            popup_display_menu (ev->time);
            return stop_signal (name_entry, "button_release_event");
      }
      return FALSE;
}

void
00379 TimeAxisView::popup_display_menu (guint32 when)
{
      if (display_menu == 0) {
            build_display_menu ();
      }
      display_menu->popup (1, when);      
}

gint
00388 TimeAxisView::size_click (GdkEventButton *ev)
{
      popup_size_menu (ev->time);
      return TRUE;
}

void
00395 TimeAxisView::popup_size_menu (guint32 when)
{
      if (size_menu == 0) {
            build_size_menu ();
      }
      size_menu->popup (1, when);
}

void
TimeAxisView::set_selected (bool yn)
{
      AxisView::set_selected (yn);

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

            hide_selection ();

            /* children will be set for the yn=true case. but when deselecting
               the editor only has a list of top-level trackviews, so we
               have to do this here.
            */

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

            
      }
}

void
00438 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 (slot (*this, &TimeAxisView::set_height), Largest)));
      items.push_back (MenuElem (_("Large"), bind (slot (*this, &TimeAxisView::set_height), Large)));
      items.push_back (MenuElem (_("Larger"), bind (slot (*this, &TimeAxisView::set_height), Larger)));
      items.push_back (MenuElem (_("Normal"), bind (slot (*this, &TimeAxisView::set_height), Normal)));
      items.push_back (MenuElem (_("Smaller"), bind (slot (*this, &TimeAxisView::set_height), Smaller)));
      items.push_back (MenuElem (_("Small"), bind (slot (*this, &TimeAxisView::set_height), Small)));
}

void
00455 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)
{
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->set_samples_per_unit (spu);
      }
}

void
TimeAxisView::show_timestretch (jack_nframes_t start, jack_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;

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

      if (GTK_OBJECT_FLAGS(GTK_OBJECT(selection_group)) & GTK_CANVAS_ITEM_VISIBLE) {
            while (!used_selection_rects.empty()) {
                  free_selection_rects.push_front (used_selection_rects.front());
                  used_selection_rects.pop_front();
                  gtk_canvas_item_hide (free_selection_rects.front()->rect);
                  gtk_canvas_item_hide (free_selection_rects.front()->start_trim);
                  gtk_canvas_item_hide (free_selection_rects.front()->end_trim);
            }
            gtk_canvas_item_hide (selection_group);
      }

      gtk_canvas_item_show (selection_group);
      gtk_canvas_item_raise_to_top (selection_group);
      
      for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
            jack_nframes_t start, end, cnt;

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

            rect = get_selection_rect ((*i).id);
            
            x1 = start / editor.get_current_zoom();
            x2 = (start + cnt - 1) / editor.get_current_zoom();
            y2 = height;

            gtk_object_set (GTK_OBJECT(rect->rect), 
                        "x1", x1,
                        "y1", 1.0,
                        "x2", x2,
                        "y2", y2,
                        NULL);
            
            // trim boxes are at the top for selections
            
            if (x2 > x1) {
                  gtk_object_set (GTK_OBJECT(rect->start_trim), 
                              "x1", x1,
                              "y1", 1.0,
                              "x2", x1 + trim_handle_size,
                              "y2", 1.0 + trim_handle_size,
                              NULL);
                  gtk_object_set (GTK_OBJECT(rect->end_trim), 
                              "x1", x2 - trim_handle_size,
                              "y1", 1.0,
                              "x2", x2,
                              "y2", 1.0 + trim_handle_size,
                              NULL);
                  gtk_canvas_item_show (rect->start_trim);
                  gtk_canvas_item_show (rect->end_trim);
            } else {
                  gtk_canvas_item_hide (rect->start_trim);
                  gtk_canvas_item_hide (rect->end_trim);
            }

            gtk_canvas_item_show (rect->rect);
            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 (GTK_OBJECT_FLAGS(GTK_OBJECT(selection_group)) & GTK_CANVAS_ITEM_VISIBLE) {
            while (!used_selection_rects.empty()) {
                  free_selection_rects.push_front (used_selection_rects.front());
                  used_selection_rects.pop_front();
                  gtk_canvas_item_hide (free_selection_rects.front()->rect);
                  gtk_canvas_item_hide (free_selection_rects.front()->start_trim);
                  gtk_canvas_item_hide (free_selection_rects.front()->end_trim);
            }
            gtk_canvas_item_hide (selection_group);
      }
      
      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
            (*i)->hide_selection ();
      }
}

void
TimeAxisView::order_selection_trims (GtkCanvasItem *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.
                  */

                  gtk_canvas_item_raise_to_top ((*i)->rect);
                  gtk_canvas_item_raise_to_top (put_start_on_top ? (*i)->start_trim : (*i)->end_trim);
                  gtk_canvas_item_raise_to_top (put_start_on_top ? (*i)->end_trim : (*i)->start_trim);

                  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) {
                  free_selection_rects.erase (i);
                  return (*i);
            }
      }

      /* 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 = gtk_canvas_item_new (GTK_CANVAS_GROUP(selection_group),
                                      gtk_canvas_simplerect_get_type(),
                                      "x1", 0.0,
                                      "y1", 0.0,
                                      "x2", 0.0,
                                      "y2", 0.0,
                                      "fill_color_rgba", color_map[cSelectionRectFill],
                                      "outline_color_rgba" , color_map[cSelectionRectOutline],
                                      NULL);
            
            
            rect->start_trim = gtk_canvas_item_new (GTK_CANVAS_GROUP(selection_group),
                                              gtk_canvas_simplerect_get_type(),
                                              "x1", (gdouble) 0.0,
                                              "x2", (gdouble) 0.0,
                                              "fill_color_rgba" , color_map[cSelectionStartFill],
                                              "outline_color_rgba" , color_map[cSelectionStartOutline],
                                              NULL);
            
            rect->end_trim = gtk_canvas_item_new (GTK_CANVAS_GROUP(selection_group),
                                            gtk_canvas_simplerect_get_type(),
                                            "x1", 0.0,
                                            "x2", 0.0,
                                            "fill_color_rgba" , color_map[cSelectionEndFill],
                                            "outline_color_rgba" , color_map[cSelectionEndOutline],
                                            NULL);
            free_selection_rects.push_front (rect);

            gtk_signal_connect (GTK_OBJECT(rect->rect), "event",
                            (GtkSignalFunc) PublicEditor::canvas_selection_rect_event,
                            &editor);
            gtk_signal_connect (GTK_OBJECT(rect->start_trim), "event",
                            (GtkSignalFunc) PublicEditor::canvas_selection_start_trim_event,
                            &editor);
            gtk_signal_connect (GTK_OBJECT(rect->end_trim), "event",
                            (GtkSignalFunc) PublicEditor::canvas_selection_end_trim_event,
                            &editor);

            gtk_object_set_data(GTK_OBJECT(rect->rect), "rect", rect);
            gtk_object_set_data(GTK_OBJECT(rect->start_trim), "rect", rect);
            gtk_object_set_data(GTK_OBJECT(rect->end_trim), "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 (jack_nframes_t start, jack_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 + height; // XXX need to include Editor::track_spacing; 
      
      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 ();
}           

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

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

            if (prop->value() == "largest") {
                  set_height (Largest);
            } else if (prop->value() == "large") {
                  set_height (Large);
            } else if (prop->value() == "larger") {
                  set_height (Larger);
            } else if (prop->value() == "normal") {
                  set_height (Normal);
            } else if (prop->value() == "smaller") {
                  set_height (Smaller);
            } else if (prop->value() == "small") {
                  set_height (Small);
            } else {
                  error << compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
                  set_height (Normal);
            }

      } else {
            set_height (Normal);
      }
}

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

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

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