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fix semi-random MIDI note separator line vanishing

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This commit is contained in:
Paul Davis 2023-09-11 14:04:59 -06:00
parent 4b15f94ccf
commit 85375397ed
1 changed files with 10 additions and 2 deletions
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12
gtk2_ardour/midi_streamview.cc
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@ -331,7 +331,7 @@ MidiStreamView::draw_note_lines()
}
double y;
double prev_y = .5;
double prev_y = 0.;
uint32_t color;
ArdourCanvas::LineSet::ResetRAII lr (*_note_lines);
@ -347,7 +347,7 @@ MidiStreamView::draw_note_lines()
for (int i = highest_note() + 1; i >= lowest_note(); --i) {
y = floor(note_to_y (i)) + .5;
y = floor (note_to_y (i));
/* this is the line actually corresponding to the division
* between notes
@ -377,6 +377,14 @@ MidiStreamView::draw_note_lines()
double h = y - prev_y;
double mid = y + (h/2.0);
/* Cairo: odd width lines must be placed on 0.5 coordinates to be
* drawn correctly.
*/
if (!fmod (h, 2.) && !fmod (mid, 1.)) {
mid += 0.5;
}
if (mid >= 0 && h > 1.0) {
_note_lines->add_coord (mid, h, color);
}