gtk2_ardour/editor_cursors.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <cstdlib>
  21 #include <cmath>
  22
  23 #include <libgnomecanvas/libgnomecanvas.h>
  24
  25 #include "utils.h"
  26 #include "editor_cursors.h"
  27 #include "editor.h"
  28
  29 using namespace ARDOUR;
  30 using namespace PBD;
  31 using namespace Gtk;
  32
  33 EditorCursor::EditorCursor (Editor& ed, bool (Editor::*callbck)(GdkEvent*,ArdourCanvas::Item*))
  34         : editor (ed),
  35           canvas_item (*editor.cursor_group),
  36           length(1.0)
  37 {
  38         points.push_back(Gnome::Art::Point(-1.0, 0.0)); // first x-coord needs to be a non-normal value
  39         points.push_back(Gnome::Art::Point(1.0, 1.0));
  40
  41         canvas_item.property_points() = points;
  42         canvas_item.property_width_pixels() = 1;
  43         canvas_item.property_first_arrowhead() = TRUE;
  44         canvas_item.property_last_arrowhead() = TRUE;
  45         canvas_item.property_arrow_shape_a() = 11.0;
  46         canvas_item.property_arrow_shape_b() = 0.0;
  47         canvas_item.property_arrow_shape_c() = 9.0;
  48
  49         canvas_item.set_data ("cursor", this);
  50         canvas_item.signal_event().connect (sigc::bind (sigc::mem_fun (ed, callbck), &canvas_item));
  51         current_frame = 1; /* force redraw at 0 */
  52 }
  53
  54 EditorCursor::~EditorCursor ()
  55
  56 {
  57 }
  58
  59 void
  60 EditorCursor::set_position (framepos_t frame)
  61 {
  62         PositionChanged (frame);
  63
  64         double new_pos =  editor.frame_to_unit (frame);
  65
  66         if (new_pos != points.front().get_x()) {
  67
  68                 points.front().set_x (new_pos);
  69                 points.back().set_x (new_pos);
  70
  71                 canvas_item.property_points() = points;
  72         }
  73         current_frame = frame;
  74 }
  75
  76 void
  77 EditorCursor::set_length (double units)
  78 {
  79         length = units;
  80         points.back().set_y (points.front().get_y() + length);
  81         canvas_item.property_points() = points;
  82 }
  83
  84 void
  85 EditorCursor::set_y_axis (double position)
  86 {
  87         points.front().set_y (position);
  88         points.back().set_y (position + length);
  89         canvas_item.property_points() = points;
  90 }