The code relied on the idea that the order-key resync that occurs after deletion would change the order keys and thus cause
a redisplay. But since both the editor and mixer can initiate an order-key resync, the other window's resync will actually
do nothing (the order keys will already be correct). This led to the incorrect placement of material in the tracks canvas,
because the first resync triggered a redisplay while the route still existed, and then the second resync didn't cause a
redisplay (repositioning) but the canvas elements representing the track went away.
Fixed by forcing a redisplay in both editor and mixer if a route deletion is believed to be triggering a row deletion
in their underlying data models.
Conflicts:
gtk2_ardour/editor_routes.cc
The code relied on the idea that the order-key resync that occurs after deletion would change the order keys and thus cause
a redisplay. But since both the editor and mixer can initiate an order-key resync, the other window's resync will actually
do nothing (the order keys will already be correct). This led to the incorrect placement of material in the tracks canvas,
because the first resync triggered a redisplay while the route still existed, and then the second resync didn't cause a
redisplay (repositioning) but the canvas elements representing the track went away.
Fixed by forcing a redisplay in both editor and mixer if a route deletion is believed to be triggering a row deletion
in their underlying data models.
Conflicts:
gtk2_ardour/editor_routes.cc
gtk2_ardour/editor_routes.h
(1) if we're dragging over the drop zone, then x-axis motion is irrelevant for threshold-of-move
(2) store original time axis view of a dragged region so that if we create a new track with the region drag, it can be the same height
* Use correct image format for background image
* Construct thr ImageSurface as per cairo docs
* Place start/end markers in background image
Tempo bars :
* adjust beats display threshold to (hopefully) coincide with BBT ruler better.
Now that these methods are only a few lines it doesn't make much sense
to keep them seeing as they are unused. There are also functions with
near identical functionality in pbd/file_utils.h
