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add a horizontal scrollbar to the pianoroll

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This commit is contained in:
Paul Davis 2025-04-18 15:00:46 -06:00
parent 743657e265
commit 29833d75c9
2 changed files with 31 additions and 2 deletions
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29
gtk2_ardour/pianoroll.cc
View file

@ -32,6 +32,8 @@
#include "canvas/rectangle.h"
#include "canvas/widget.h"
#include "ytkmm/scrollbar.h"
#include "gtkmm2ext/actions.h"
#include "widgets/ardour_button.h"
@ -268,6 +270,8 @@ Pianoroll::build_lower_toolbar ()
{
ArdourButton::Element elements = ArdourButton::Element (ArdourButton::Text|ArdourButton::Indicator|ArdourButton::Edge|ArdourButton::Body);
_canvas_hscrollbar = manage (new Gtk::HScrollbar (horizontal_adjustment));
velocity_button = new ArdourButton (_("Velocity"), elements);
bender_button = new ArdourButton (_("Bender"), elements);
pressure_button = new ArdourButton (_("Pressure"), elements);
@ -326,6 +330,7 @@ Pianoroll::build_lower_toolbar ()
cc_dropdown2->signal_led_clicked.connect (sigc::bind (sigc::mem_fun (*this, &Pianoroll::user_led_click), cc_dropdown2));
cc_dropdown3->signal_led_clicked.connect (sigc::bind (sigc::mem_fun (*this, &Pianoroll::user_led_click), cc_dropdown3));
_toolbox.pack_start (*_canvas_hscrollbar, false, false);
_toolbox.pack_start (button_bar, false, false);
}
@ -834,6 +839,11 @@ Pianoroll::set_samples_per_pixel (samplecnt_t spp)
bbt_ruler->set_range (0, current_page_samples());
compute_bbt_ruler_scale (0, current_page_samples());
bbt_metric.units_per_pixel = spp;
horizontal_adjustment.set_upper (max_zoom_extent().second.samples() / samples_per_pixel);
horizontal_adjustment.set_page_size (current_page_samples()/ samples_per_pixel / 10);
horizontal_adjustment.set_page_increment (current_page_samples()/ samples_per_pixel / 20);
horizontal_adjustment.set_step_increment (current_page_samples() / samples_per_pixel / 100);
}
samplecnt_t
@ -2188,6 +2198,20 @@ Pianoroll::trigger_prop_change (PBD::PropertyChange const & what_changed)
std::shared_ptr<MidiRegion> mr = std::dynamic_pointer_cast<MidiRegion> (ref.trigger()->the_region());
if (mr) {
set_region (mr);
zoom_to_show (timecnt_t (timepos_t (max_extents_scale() * max_zoom_extent ().second.samples())));
}
}
}
void
Pianoroll::region_prop_change (PBD::PropertyChange const & what_changed)
{
std::cerr << "region prop change " << what_changed << std::endl;
if (what_changed.contains (Properties::length)) {
std::shared_ptr<MidiRegion> mr = view->midi_region();
if (mr) {
set_region (mr);
zoom_to_show (timecnt_t (timepos_t (max_extents_scale() * max_zoom_extent ().second.samples())));
}
}
}
@ -2512,8 +2536,9 @@ Pianoroll::update_solo_display ()
void
Pianoroll::set_region (std::shared_ptr<ARDOUR::MidiRegion> r)
{
unset ();
if (!r) {
unset ();
return;
}
@ -2522,6 +2547,7 @@ Pianoroll::set_region (std::shared_ptr<ARDOUR::MidiRegion> r)
view->show_end (true);
r->DropReferences.connect (object_connections, invalidator (*this), std::bind (&Pianoroll::unset, this), gui_context());
r->PropertyChanged.connect (object_connections, invalidator (*this), std::bind (&Pianoroll::region_prop_change, this, _1), gui_context());
bool provided = false;
std::shared_ptr<Temporal::TempoMap> map;
@ -2540,7 +2566,6 @@ Pianoroll::set_region (std::shared_ptr<ARDOUR::MidiRegion> r)
EditingContext::TempoMapScope tms (*this, map);
/* Compute zoom level to show entire source plus some margin if possible */
zoom_to_show (timecnt_t (timepos_t (max_extents_scale() * max_zoom_extent ().second.samples())));
}
_update_connection = Timers::rapid_connect (sigc::mem_fun (*this, &Pianoroll::maybe_update));

4
gtk2_ardour/pianoroll.h
View file

@ -30,6 +30,7 @@
namespace Gtk {
class Widget;
class HScrollbar;
}
namespace ArdourCanvas {
@ -181,6 +182,8 @@ class Pianoroll : public CueEditor
ArdourCanvas::GtkCanvasViewport* _canvas_viewport;
ArdourCanvas::GtkCanvas* _canvas;
Gtk::HScrollbar* _canvas_hscrollbar;
/* The group containing all other groups that are scrolled vertically
and horizontally.
*/
@ -264,6 +267,7 @@ class Pianoroll : public CueEditor
PBD::ScopedConnectionList view_connections;
void maybe_update ();
void trigger_prop_change (PBD::PropertyChange const &);
void region_prop_change (PBD::PropertyChange const &);
void unset ();