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livetrax/gtk2_ardour/tempo_map_change.cc

75 lines
1.9 KiB
C++

/*
Copyright (C) 2022 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 "pbd/i18n.h"
#include "tempo_map_change.h"
TempoMapChange::TempoMapChange (PublicEditor& e, std::string const & str, bool uoc, bool begin_now)
: editor (e)
, name (str)
, aborted (false)
, begun (false)
, update_on_commit (uoc)
, before (0)
{
if (begin_now) {
begin ();
}
}
TempoMapChange::~TempoMapChange ()
{
if (!aborted && begun) {
XMLNode& after = writable_map->get_state();
editor.session()->add_command (new Temporal::TempoCommand (_("tempo map change"), before, &after));
editor.commit_tempo_map_edit (writable_map, update_on_commit);
editor.commit_reversible_command ();
}
}
void
TempoMapChange::begin ()
{
writable_map = editor.begin_tempo_map_edit ();
before = &writable_map->get_state();
editor.begin_reversible_command (name);
begun = true;
}
void
TempoMapChange::abort ()
{
if (begun) {
editor.abort_tempo_map_edit ();
editor.abort_reversible_command ();
aborted = true;
begun = false;
}
}
void
TempoMapChange::use_new_map (Temporal::TempoMap::WritableSharedPtr new_map)
{
/* existing write copy goes out of scope, and is deleted, We continue
* on with the new map, and will RCU-update it in our destructor.
*/
writable_map = new_map;
}