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Emit notify_layering_changed() more often; especially when we remove the only region on a top layer, and the StreamView needs to sort itself out.

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git-svn-id: svn://localhost/ardour2/branches/3.0@11126 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Carl Hetherington 2011-12-31 13:25:50 +00:00
parent 9c8a27c664
commit 6c0224c987
1 changed files with 7 additions and 9 deletions
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16
libs/ardour/playlist.cc
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@ -2397,8 +2397,6 @@ Playlist::relayer ()
return;
}
bool changed = false;
/* Build up a new list of regions on each layer, stored in a set of lists
each of which represent some period of time on some layer. The idea
is to avoid having to search the entire region list to establish whether
@ -2490,16 +2488,16 @@ Playlist::relayer ()
layers[j][k].push_back (*i);
}
if ((*i)->layer() != j) {
changed = true;
}
(*i)->set_layer (j);
}
if (changed) {
notify_layering_changed ();
}
/* It's a little tricky to know when we could avoid calling this; e.g. if we are
relayering because we just removed the only region on the top layer, nothing will
appear to have changed, but the StreamView must still sort itself out. We could
probably keep a note of the top layer last time we relayered, and check that,
but premature optimisation &c...
*/
notify_layering_changed ();
/* This relayer() may have been called as a result of a region removal, in which
case we need to setup layering indices so account for the one that has just