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Editor zooming: 

New function session_gui_extents() reports the extents of all playlists.
  ToDo: include region playlists, when they become available.
also:  slow-down autoscroll (ToDo:  make a config variable for this)
This commit is contained in:
Ben Loftis 2017-08-26 21:00:45 -05:00
parent e9f4c5fc1c
commit 9b87279eca
2 changed files with 46 additions and 0 deletions
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3
gtk2_ardour/editor.h
View File

@ -364,6 +364,9 @@ public:
void set_group_tabs ();
void toggle_measure_visibility ();
/* returns the left-most and right-most time that the gui should allow the user to scroll to */
std::pair <framepos_t,framepos_t> session_gui_extents() const;
/* fades */
void toggle_region_fades (int dir);

43
gtk2_ardour/editor_canvas.cc
View File

@ -581,6 +581,45 @@ Editor::autoscroll_active () const
return autoscroll_connection.connected ();
}
std::pair <framepos_t,framepos_t>
Editor::session_gui_extents () const
{
framecnt_t session_extent_start = _session->current_start_frame();
framecnt_t session_extent_end = _session->current_end_frame();
//calculate the extents of all regions in every playlist
//NOTE: we should listen to playlists, and cache these values so we don't calculate them every time.
{
boost::shared_ptr<RouteList> rl = _session->get_routes();
for (RouteList::iterator r = rl->begin(); r != rl->end(); ++r) {
boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*r);
if (tr) {
boost::shared_ptr<Playlist> pl = tr->playlist();
if ( pl && !pl->all_regions_empty() ) {
pair<framepos_t, framepos_t> e;
e = pl->get_extent();
if (e.first < session_extent_start) {
session_extent_start = e.first;
}
if (e.second > session_extent_end) {
session_extent_end = e.second;
}
}
}
}
}
//ToDo: also incorporate automation regions (in case the session has no audio/midi but is just used for automating plugins or the like)
//if all else fails, give us 2 minutes
framecnt_t const min_length = _session->nominal_frame_rate()*60*2;
if ( session_extent_end < min_length )
session_extent_end = min_length;
std::pair <framepos_t,framepos_t> ret (session_extent_start, session_extent_end);
return ret;
}
bool
Editor::autoscroll_canvas ()
{
@ -612,6 +651,8 @@ Editor::autoscroll_canvas ()
dx += 10 + (2 * (autoscroll_cnt/2));
dx = pixel_to_sample (dx);
dx /= 10; //ToDo: make a config variable for scroll speed zoom-behavior-tweaks
if (leftmost_frame < max_framepos - dx) {
new_frame = leftmost_frame + dx;
@ -628,6 +669,8 @@ Editor::autoscroll_canvas ()
dx = pixel_to_sample (dx);
dx /= 10; //ToDo: make a config variable for scroll speed zoom-behavior-tweaks
if (leftmost_frame >= dx) {
new_frame = leftmost_frame - dx;
} else {