ArdourButtons now have a "pushed" animation.
The gradient is now implemented in the button, rather than providing 2 colors in the theme, which was burdensome.
Lots of code cleanup in ArdourButton. Removed several unnecessary flags.
Refactor more stuff into route_ui.
Refactor comments dialog into Route_UI so it can be shared by tracks and strips.
Make Color and Comments selections consistent in the menus
Refine the color displays at the top of each mixer strip
Correctly color the number displays on tracks
This will be used when you paste with Ripple; it maintains the whitespace that you chose in the selection.
Also fix default setting of Dim contol by storing the default(normal) value for MPControl Controllables.
When deleting a range in ripple mode, ripple everything after the start
point of that range backwards by the length of the range, so that
newly-created regions immediately at the range end move back to the range
start.
Add a value for Ripple to EditMode enum.
Add Ripple edit mode to edit mode dropdown, by adding it to the
Editor::build_edit_mode_menu() helper function, and remove the old code that
added items to the (now unused) Editor::edit_mode_strings.
Add the regions that should be affected by the drag to RegionDrag::_views so
that the drag carries them along automatically.
Use a copy of the RegionList in Playlist::core_ripple(), since bad things
happen when iterating over regions and they get moved around in the list.
Handle rippling in removal of regions from playlist.
When dragging in ripple mode, exclude all regions that lie before the
original start position of the selected regions being dragged from
rippling: this is what Mixbus does.
Make editor dragging respect snap-to settings, by using the existing
compute_x_delta() function, which did almost the right thing. Move setting
of _last_frame_position out of that function so all ripple-dragged regions
can move.
Ripple when dragging from region list: even though Mixbus doesn't do this, it
seems like a good idea.
Prevent multi-track selection being dragged across tracks, by making
RegionMotionDrag::y_movement_allowed() virtual, and overriding it in
RegionRippleDrag to forbid dragging of selections containing regions on more
than one track to dofferent tracks in ripple mode.
Remember which TimeAxisView a ripple-mode drag that's allowed cross-track
drags started from, so that the effect of rippling regions after any region
that's dragged off that track can be undone.
