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RTA scrollbar: fix off-by-one

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After zooming in to show a span of 24dB, scrolling or dragging
upwards did not work.
This commit is contained in:
Robin Gareus
2025-11-18 22:40:08 +01:00
parent 2b65a6dbe0
commit 42785a03df
1 changed files with 2 additions and 2 deletions
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4
gtk2_ardour/rta_window.cc
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@@ -453,7 +453,7 @@ RTAWindow::darea_motion_notify_event (GdkEventMotion* ev)
changed = _min_dB != new_dB;
_min_dB = new_dB;
} else {
float min_dB = rintf (std::max (_dB_min, std::min (new_dB, _max_dB - _dB_span)));
float min_dB = rintf (std::max (_dB_min, std::min (new_dB, 1 + _max_dB - _dB_span)));
float dbd = (min_dB - _min_dB);
float max_dB = rintf (std::min (_dB_min + _dB_range, std::max (_max_dB + dbd, _min_dB + _dB_span)));
dbd = std::min<float> (dbd, max_dB - _max_dB);
@@ -543,7 +543,7 @@ RTAWindow::darea_scroll_event (GdkEventScroll* ev)
} else {
float new_dB = _min_dB + delta;
/* compare to DragRange */
float min_dB = rintf (std::max (_dB_min, std::min (new_dB, _max_dB - _dB_span)));
float min_dB = rintf (std::max (_dB_min, std::min (new_dB, 1 + _max_dB - _dB_span)));
float dbd = (min_dB - _min_dB);
float max_dB = rintf (std::min (_dB_min + _dB_range, std::max (_max_dB + dbd, _min_dB + _dB_span)));
dbd = std::min<float> (dbd, max_dB - _max_dB);