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(1) remove most uses of MementoCommand for Playlist and Region (2) move frozen state from Region into Stateful, renamed "suspend property changes" (3) successive changes to a Property (scalar) after clear_history() do not keep resetting the old value (fixes region trim)

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git-svn-id: svn://localhost/ardour2/branches/3.0@6720 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2010-03-02 18:05:26 +00:00
parent a5ab2e99e1
commit 17088ee3ea
35 changed files with 326 additions and 362 deletions
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52
libs/pbd/stateful.cc
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@ -39,7 +39,9 @@ int Stateful::current_state_version = 0;
int Stateful::loading_state_version = 0;
Stateful::Stateful ()
: _properties (new OwnedPropertyList)
: _frozen (0)
, _no_property_changes (false)
, _properties (new OwnedPropertyList)
{
_extra_xml = 0;
_instant_xml = 0;
@ -238,4 +240,52 @@ Stateful::add_property (PropertyBase& s)
_properties->add (s);
}
void
Stateful::send_change (const PropertyChange& what_changed)
{
if (what_changed.empty()) {
return;
}
{
Glib::Mutex::Lock lm (_lock);
if (_frozen) {
_pending_changed.add (what_changed);
return;
}
}
PropertyChanged (what_changed);
}
void
Stateful::suspend_property_changes ()
{
_frozen++;
}
void
Stateful::resume_property_changes ()
{
PropertyChange what_changed;
{
Glib::Mutex::Lock lm (_lock);
if (_frozen && --_frozen > 0) {
return;
}
if (!_pending_changed.empty()) {
what_changed = _pending_changed;
_pending_changed.clear ();
}
}
mid_thaw (what_changed);
send_change (what_changed);
}
} // namespace PBD