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RTA: allow to zoom using shift + scroll

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This commit is contained in:
Robin Gareus
2025-04-15 00:25:28 +02:00
parent 1592a4c38e
commit aecbe6de50
1 changed files with 20 additions and 10 deletions
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30
gtk2_ardour/rta_window.cc
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@@ -31,6 +31,7 @@
#include "ardour_ui.h"
#include "gui_thread.h"
#include "keyboard.h"
#include "rta_manager.h"
#include "rta_window.h"
#include "timers.h"
@@ -486,24 +487,33 @@ RTAWindow::darea_scroll_event (GdkEventScroll* ev)
return true;
}
float new_dB = _min_dB;
float delta = 0;
switch (ev->direction) {
case GDK_SCROLL_UP:
new_dB += 1;
delta = 1;
break;
case GDK_SCROLL_DOWN:
new_dB -= 1;
delta = -1;
break;
default:
return true;
}
/* compare to DragRange */
float min_dB = rintf (std::max (_dB_min, std::min (new_dB, _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);
_max_dB += dbd;
_min_dB += dbd;
using Gtkmm2ext::Keyboard;
if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollHorizontalModifier)) {
_min_dB = rintf (std::max (_dB_min, std::min (_min_dB - delta, _max_dB - _dB_span)));
_max_dB = rintf (std::min (_dB_min + _dB_range, std::max (_max_dB + delta, _min_dB + _dB_span)));
} 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 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);
_max_dB += dbd;
_min_dB += dbd;
}
_grid.clear ();
_darea.queue_draw ();