a menu allows choosing between all markers or 1 specific type, and all ranges or 1 specific type
more work required on menu structure and menu options/dialogs to specify the type of new location
and range marker creation
This also adds interaction with sections in the
Arrangement Ruler.
Note that selecting a range switches to the Range tool.
This is enforced because time-range selection is only meaningful
with tools that perform edit operations on the whole timeline.
These were being drawn in a way that failed to really convey relative
tempos very well. This is now better, though perhaps there are other
improvements possible
Previously CD-markers and Arrangement-markers were shown
in the default Maker ruler when CD or Arrangement ruler
were hidden.
This also fixes a bug that could result in marker-labels
being cut short. Editor::update_marker_labels calculates
overlap with other markes in the same group; but re-parenting
did not update the sorted_marker_lists[group] index.
Draw regular tempo/meter markers for BBT markers, and move them when BBT marker is dragged
This will (does) allow regular editing workflow for the tempo/meter at at BBT marker
the API now provides the option to call ::get_grid() with an iterator which may
be re-used on subsequent calls. This avoids unbounded O(N) "walks" from the
marker preceding the start point of the grid to the start point.
This commit also includes "fast-path" code for the common case of a single
tempo and single meter
Make click & drag in the left-hand half of a region with the Timestretch
tool stretch the region on its left, leaving the end position of the new
time-stretched region in the same place as the end of the original.
Deleting _track_canvas_viewport automatically destroys
any child Items. The LocationMarker's group was already destroyed
when ~ArdourMarker() runs and calls `delete group`.
So first delete the marker, then the canvas
