1d6ee0b7e220d49b5f181d364e9154c4a0734121
Undo/Redo allows to change a region's envelope without the envelope-list changing (AutomationList::StateChanged is not emitted). This also catches other operations where region-length can change while the Envelope is visible. -- Normally when using the range or object tool to modify a Region, the Envelope is not visible. Without this change it was possible that the GUI shows automation points that don't have a corresponding libardour representation: e.g. select range, change tool to "draw", press "s" (split), undo, click on any region-gain point.
Please see the Ardour web site at http://ardour.org/ for all documentation..
For information on building ardour:
http://ardour.org/development.html
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