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livetrax/gtk2_ardour/editor_cursors.cc
Paul Davis ec7d502959 cairo single pixel line offset fix, part 2
This will need careful visual inspection of the items drawn by the
affected code to make sure they are still precisely as intended
2023-07-17 20:55:13 -06:00

118 lines
3.4 KiB
C++

/*
* Copyright (C) 2005-2008 Nick Mainsbridge <mainsbridge@gmail.com>
* Copyright (C) 2005-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2005 Taybin Rutkin <taybin@taybin.com>
* Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2009-2015 David Robillard <d@drobilla.net>
* Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <cstdlib>
#include <cmath>
#include "canvas/canvas.h"
#include "canvas/debug.h"
#include "canvas/scroll_group.h"
#include "editor_cursors.h"
#include "editor.h"
using namespace ARDOUR;
using namespace PBD;
using namespace Gtk;
EditorCursor::EditorCursor (Editor& ed, bool (Editor::*callback)(GdkEvent*,ArdourCanvas::Item*), std::string const & name)
: _editor (ed)
, _track_canvas_item (new ArdourCanvas::Arrow (_editor.get_cursor_scroll_group()))
{
CANVAS_DEBUG_NAME (_track_canvas_item, string_compose ("track canvas editor cursor <%1>", name));
_track_canvas_item->set_show_head (0, true);
_track_canvas_item->set_head_height (0, 9);
_track_canvas_item->set_head_width (0, 16);
_track_canvas_item->set_head_outward (0, false);
_track_canvas_item->set_show_head (1, false); // head only
_track_canvas_item->set_data ("cursor", this);
_track_canvas_item->Event.connect (sigc::bind (sigc::mem_fun (ed, callback), _track_canvas_item));
_track_canvas_item->set_y1 (ArdourCanvas::COORD_MAX);
_track_canvas_item->set_x (0);
_current_sample = 1; /* force redraw at 0 */
}
EditorCursor::EditorCursor (Editor& ed, std::string const & name)
: _editor (ed)
, _track_canvas_item (new ArdourCanvas::Arrow (_editor.get_hscroll_group()))
{
CANVAS_DEBUG_NAME (_track_canvas_item, string_compose ("track canvas cursor <%1>", name));
_track_canvas_item->set_show_head (0, false);
_track_canvas_item->set_show_head (1, false);
_track_canvas_item->set_y1 (ArdourCanvas::COORD_MAX);
_track_canvas_item->set_ignore_events (true);
_track_canvas_item->set_x (0);
_current_sample = 1; /* force redraw at 0 */
}
EditorCursor::~EditorCursor ()
{
delete _track_canvas_item;
}
void
EditorCursor::set_position (samplepos_t sample)
{
if (_current_sample != sample) { PositionChanged (sample); }
double const new_pos = _editor.sample_to_pixel_unrounded (sample);
if (rint(new_pos) != rint(_track_canvas_item->x ())) {
_track_canvas_item->set_x (new_pos + 0.5); //accommodate the 1/2 pixel "line" offset in cairo
}
_current_sample = sample;
}
void
EditorCursor::show ()
{
_track_canvas_item->show ();
}
void
EditorCursor::hide ()
{
_track_canvas_item->hide ();
}
void
EditorCursor::set_color (Gtkmm2ext::Color color)
{
_track_canvas_item->set_color (color);
}
void
EditorCursor::set_sensitive (bool yn)
{
_track_canvas_item->set_ignore_events (!yn);
}