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/*
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.
$Id$
*/
#include <cstdlib>
#include <cmath>
#include <gtk-canvas.h>
#include "utils.h"
#include "editor.h"
using namespace sigc;
using namespace ARDOUR;
using namespace Gtk;
Editor::Cursor::Cursor (Editor& ed, const string& color, GtkSignalFunc callbck)
: editor (ed), callback (callbck), length(1.0)
{
GtkCanvasGroup *group;
points = gtk_canvas_points_new (2);
/* "randomly" initialize coords */
points->coords[0] = -9383839.0;
points->coords[1] = 0.0;
points->coords[2] = 1.0;
points->coords[3] = 0.0;
group = GTK_CANVAS_GROUP (editor.cursor_group);
// cerr << "set cursor points, nc = " << points->num_points << endl;
canvas_item = gtk_canvas_item_new (group,
gtk_canvas_line_get_type(),
"points", points,
"fill_color", color.c_str(),
"width_pixels", 1,
"first_arrowhead", (gboolean) TRUE,
"last_arrowhead", (gboolean) TRUE,
"arrow_shape_a", 11.0,
"arrow_shape_b", 0.0,
"arrow_shape_c", 9.0,
NULL);
// cerr << "cursor line @ " << canvas_item << endl;
gtk_object_set_data (GTK_OBJECT(canvas_item), "cursor", this);
gtk_signal_connect (GTK_OBJECT(canvas_item), "event", callback, &editor);
current_frame = 1; /* force redraw at 0 */
}
Editor::Cursor::~Cursor ()
{
gtk_object_destroy (GTK_OBJECT(canvas_item));
gtk_canvas_points_unref (points);
}
void
Editor::Cursor::set_position (jack_nframes_t frame)
{
double new_pos = editor.frame_to_unit (frame);
if (editor.session == 0) {
gtk_canvas_item_hide (canvas_item);
} else {
gtk_canvas_item_show (canvas_item);
}
current_frame = frame;
if (new_pos == points->coords[0]) {
/* change in position is not visible, so just raise it */
gtk_canvas_item_raise_to_top (canvas_item);
return;
}
points->coords[0] = new_pos;
points->coords[2] = new_pos;
// cerr << "set cursor2 al points, nc = " << points->num_points << endl;
gtk_canvas_item_set (canvas_item, "points", points, NULL);
gtk_canvas_item_raise_to_top (canvas_item);
}
void
Editor::Cursor::set_length (double units)
{
length = units;
points->coords[3] = points->coords[1] + length;
// cerr << "set cursor3 al points, nc = " << points->num_points << endl;
gtk_canvas_item_set (canvas_item, "points", points, NULL);
}
void
Editor::Cursor::set_y_axis (double position)
{
points->coords[1] = position;
points->coords[3] = position + length;
// cerr << "set cursor4 al points, nc = " << points->num_points << endl;
gtk_canvas_item_set (canvas_item, "points", points, NULL);
}
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