122 lines
3.2 KiB
C++
122 lines
3.2 KiB
C++
/*
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Copyright (C) 2000 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <cstdlib>
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#include <cmath>
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#include <libgnomecanvas/libgnomecanvas.h>
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#include "utils.h"
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#include "editor.h"
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using namespace sigc;
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using namespace ARDOUR;
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using namespace Gtk;
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Editor::Cursor::Cursor (Editor& ed, const string& color, GtkSignalFunc callbck)
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: editor (ed), callback (callbck), length(1.0)
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{
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GnomeCanvasGroup *group;
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points = gnome_canvas_points_new (2);
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/* "randomly" initialize coords */
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points->coords[0] = -9383839.0;
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points->coords[1] = 0.0;
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points->coords[2] = 1.0;
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points->coords[3] = 0.0;
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group = GNOME_CANVAS_GROUP (editor.cursor_group);
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// cerr << "set cursor points, nc = " << points->num_points << endl;
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canvas_item = gnome_canvas_item_new (group,
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gnome_canvas_line_get_type(),
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"points", points,
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"fill_color", color.c_str(),
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"width_pixels", 1,
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"first_arrowhead", (gboolean) TRUE,
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"last_arrowhead", (gboolean) TRUE,
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"arrow_shape_a", 11.0,
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"arrow_shape_b", 0.0,
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"arrow_shape_c", 9.0,
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NULL);
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// cerr << "cursor line @ " << canvas_item << endl;
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gtk_object_set_data (GTK_OBJECT(canvas_item), "cursor", this);
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gtk_signal_connect (GTK_OBJECT(canvas_item), "event", callback, &editor);
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current_frame = 1; /* force redraw at 0 */
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}
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Editor::Cursor::~Cursor ()
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{
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gtk_object_destroy (GTK_OBJECT(canvas_item));
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gnome_canvas_points_unref (points);
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}
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void
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Editor::Cursor::set_position (jack_nframes_t frame)
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{
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double new_pos = editor.frame_to_unit (frame);
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if (editor.session == 0) {
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gnome_canvas_item_hide (canvas_item);
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} else {
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gnome_canvas_item_show (canvas_item);
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}
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current_frame = frame;
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if (new_pos == points->coords[0]) {
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/* change in position is not visible, so just raise it */
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gnome_canvas_item_raise_to_top (canvas_item);
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return;
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}
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points->coords[0] = new_pos;
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points->coords[2] = new_pos;
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// cerr << "set cursor2 al points, nc = " << points->num_points << endl;
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gnome_canvas_item_set (canvas_item, "points", points, NULL);
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gnome_canvas_item_raise_to_top (canvas_item);
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}
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void
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Editor::Cursor::set_length (double units)
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{
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length = units;
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points->coords[3] = points->coords[1] + length;
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// cerr << "set cursor3 al points, nc = " << points->num_points << endl;
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gnome_canvas_item_set (canvas_item, "points", points, NULL);
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}
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void
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Editor::Cursor::set_y_axis (double position)
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{
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points->coords[1] = position;
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points->coords[3] = position + length;
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// cerr << "set cursor4 al points, nc = " << points->num_points << endl;
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gnome_canvas_item_set (canvas_item, "points", points, NULL);
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}
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