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correct errors in coordinate math when moving a mote selection

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This may be the first of several instances where mixing
timeline-relative positions and global canvas coordinates leads to
problems. Let's hope there are not too many.
This commit is contained in:
Paul Davis 2024-06-06 16:12:41 -06:00
parent e7ae93929b
commit e0a5b591f8
1 changed files with 30 additions and 13 deletions
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43
gtk2_ardour/midi_view.cc
View file

@ -2466,7 +2466,7 @@ MidiView::earliest_in_selection ()
}
void
MidiView::move_selection(timecnt_t const & dx_qn, double dy, double cumulative_dy)
MidiView::move_selection (timecnt_t const & dx_qn, double dy, double cumulative_dy)
{
typedef vector<std::shared_ptr<NoteType> > PossibleChord;
PossibleChord to_play;
@ -2481,24 +2481,39 @@ MidiView::move_selection(timecnt_t const & dx_qn, double dy, double cumulative_d
double dx = 0.0;
if (_midi_context.note_mode() == Sustained) {
dx = _editing_context.time_to_pixel_unrounded (timepos_t (note_time_qn + dx_qn.beats()))
- n->item()->item_to_canvas (ArdourCanvas::Duple (n->x0(), 0)).x;
dx = _editing_context.time_to_pixel_unrounded (timepos_t (note_time_qn + dx_qn.beats()));
/*: ::item_to_canvas() converts to a global canvas
* coordinate, but ::time_to_pixel() gives us a
* timeline-relative coordinate.
*
* So we need to adjust ...
*/
dx -= _editing_context.canvas_to_timeline (n->item()->item_to_canvas (ArdourCanvas::Duple (n->x0(), 0)).x);
} else {
/* Hit::x0() is offset by _position.x, unlike Note::x0() */
Hit* hit = dynamic_cast<Hit*>(n);
if (hit) {
dx = _editing_context.time_to_pixel_unrounded (timepos_t (note_time_qn + dx_qn.beats()))
- n->item()->item_to_canvas (ArdourCanvas::Duple (((hit->x0() + hit->x1()) / 2.0) - hit->position().x, 0)).x;
dx = _editing_context.time_to_pixel_unrounded (timepos_t (note_time_qn + dx_qn.beats()));
dx -= _editing_context.canvas_to_timeline ( n->item()->item_to_canvas (ArdourCanvas::Duple (((hit->x0() + hit->x1()) / 2.0) - hit->position().x, 0)).x);
}
}
(*i)->move_event(dx, dy);
(*i)->move_event (dx, dy);
/* update length */
/* update length, which may have changed in pixels at the new location */
if (_midi_context.note_mode() == Sustained) {
Note* sus = dynamic_cast<Note*> (*i);
double const len_dx = _editing_context.time_to_pixel_unrounded (timepos_t (note_time_qn) + dx_qn + timecnt_t (n->note()->length()));
double len_dx = _editing_context.time_to_pixel_unrounded (timepos_t (note_time_qn) + dx_qn + timecnt_t (n->note()->length()));
/* at this point, len_dx is a timeline-relative pixel
* duration. To convert it back to an item-centric
* coordinate, we need to first convert it to a global
* canvas position.
*/
len_dx = _editing_context.timeline_to_canvas (len_dx);
sus->set_x1 (n->item()->canvas_to_item (ArdourCanvas::Duple (len_dx, 0)).x);
}
}
@ -2661,7 +2676,9 @@ MidiView::note_dropped (NoteBase *, timecnt_t const & d_qn, int8_t dnote, bool c
continue;
}
note_diff_add_change (sel, MidiModel::NoteDiffCommand::StartTime, new_time);
if (new_time != sel->note()->time()) {
note_diff_add_change (sel, MidiModel::NoteDiffCommand::StartTime, new_time);
}
uint8_t original_pitch = sel->note()->note();
uint8_t new_pitch = original_pitch + dnote - highest_note_difference;
@ -2672,10 +2689,12 @@ MidiView::note_dropped (NoteBase *, timecnt_t const & d_qn, int8_t dnote, bool c
lowest_note_in_selection = std::min(lowest_note_in_selection, new_pitch);
highest_note_in_selection = std::max(highest_note_in_selection, new_pitch);
note_diff_add_change (sel, MidiModel::NoteDiffCommand::NoteNumber, new_pitch);
if (new_pitch != original_pitch) {
note_diff_add_change (sel, MidiModel::NoteDiffCommand::NoteNumber, new_pitch);
}
}
} else {
} else {
clear_selection_internal ();
for (CopyDragEvents::iterator i = _copy_drag_events.begin(); i != _copy_drag_events.end(); ++i) {
@ -2723,8 +2742,6 @@ MidiView::note_dropped (NoteBase *, timecnt_t const & d_qn, int8_t dnote, bool c
_copy_drag_events.clear ();
}
std::cerr << "DROP & EDIT\n";
apply_note_diff (true /*subcommand, we don't want this to start a new commit*/, copy);
_editing_context.commit_reversible_command ();