This is a backport from Mixbus, to leave are 4 "open" pixels
at the bottom of the track so one can see the grid-lines between tracks.
This is useful with low region-transparency. grid-lines behind
opaque regions are not visible.
Separate Snap from Grid. Lots of naming changes.
Multiple simultaneous snap options allowed. Grid is one of the possible Snap options.
Grid uses the same data as the rulers. Replace complicated tempo_lines with simple grid_lines.
The Grid is zoom-scale-sensitive along with the rulers. If you are zoomed out, grid becomes coarser.
Snapped Cursor is a line that follows the edit point, and indicates where the operation will occur.
This replaces and extends the line that appears with the Cut tool.
New associated preferences: snap_threshold and show_snap_cursor.
Add config setting for playhead-scroll-speed.
Default to 100% for now, but for new users we might later default it to something slower.
If you want to scroll quickly, it is preferred to zoom out first, then scroll.
This prevents various edge-cases of selection-clocks (eg. unbound range
selection after start-range; and makes it near impossible to roll-over
2^63 using GUI operations)
Ardour translations and GUI string formatting only depends on the C locale.
Modifying the C++ locale may produce erratic results on various systems
(in particular OSX and macOS) and cause incompatibilies with plugins.
Currently implemented for Region and Range selections.
The new option is false/off by default to maintain existing behaviour. I'm not
sure it should require another option, perhaps Zoom to Selection should be the
default and accessing the region properties dialog can be via Modifier+double
click, but further changes can be made on user feedback etc.
Related: #7112
This is a common operation used for zooming in other DAWs like Ableton Live and
Cubase. To support such a usage pattern without changing the existing behaviour
of the ruler area I've made it an option that is false by default.
The behaviour of RulerDragZoom is intentionally different than a CursorDrag
that occurs in the rest of the ruler area in that it doesn't follow the snap to
grid setting and no locate related stuff occurs until button release.
There are some issues with responsiveness with more than a few hundred regions
or a large amount of MIDI events/notes.
Implements feature #6768
This means that mouse zoom scrolling behaviour is consistent on the ruler
canvas area and track canvas area.
The config option defaults to true so this means the behaviour of Mixbus will
be unchanged but in Ardour the ruler area will now follow the option so by
default will use the mouse position as zoom focus when zooming rather than the
zoom focus setting.
