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editor_cursors.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 <libgnomecanvas/libgnomecanvas.h>

#include "utils.h"
#include "editor.h"

using namespace sigc;
using namespace ARDOUR;
using namespace PBD;
using namespace Gtk;

Editor::Cursor::Cursor (Editor& ed, bool (Editor::*callbck)(GdkEvent*,ArdourCanvas::Item*))
      : editor (ed),
        canvas_item (*editor.cursor_group),
        length(1.0)
{
      points.push_back(Gnome::Art::Point(-1.0, 0.0)); // first x-coord needs to be a non-normal value
      points.push_back(Gnome::Art::Point(1.0, 1.0));

      canvas_item.property_points() = points;
      canvas_item.property_width_pixels() = 1;
      canvas_item.property_first_arrowhead() = TRUE;
      canvas_item.property_last_arrowhead() = TRUE;
      canvas_item.property_arrow_shape_a() = 11.0;
      canvas_item.property_arrow_shape_b() = 0.0;
      canvas_item.property_arrow_shape_c() = 9.0;

      canvas_item.set_data ("cursor", this);
      canvas_item.signal_event().connect (bind (mem_fun (ed, callbck), &canvas_item));
      current_frame = 1; /* force redraw at 0 */
}

Editor::Cursor::~Cursor ()

{
}

void
Editor::Cursor::set_position (nframes64_t frame)
{
      double new_pos =  editor.frame_to_unit (frame);

      if (new_pos != points.front().get_x()) {

            points.front().set_x (new_pos);
            points.back().set_x (new_pos);

            canvas_item.property_points() = points;
      }
      current_frame = frame;
}

void
Editor::Cursor::set_length (double units)
{
      length = units; 
      points.back().set_y (points.front().get_y() + length);
      canvas_item.property_points() = points;
}

void 
Editor::Cursor::set_y_axis (double position)
{
        points.front().set_y (position);
      points.back().set_y (position + length);
      canvas_item.property_points() = points;
}

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