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ardour/gtk2_ardour/shuttle_control.cc

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/*
Copyright (C) 2011 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <algorithm>
#include <cairo.h>
#include "ardour/ardour.h"
#include "ardour/audioengine.h"
#include "ardour/rc_configuration.h"
#include "ardour/session.h"
#include "gtkmm2ext/keyboard.h"
#include "gtkmm2ext/gui_thread.h"
#include "gtkmm2ext/cairocell.h"
#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/rgb_macros.h"
#include "actions.h"
#include "ardour_ui.h"
#include "rgb_macros.h"
#include "shuttle_control.h"
#include "i18n.h"
using namespace Gtk;
using namespace Gtkmm2ext;
using namespace ARDOUR;
using std::min;
using std::max;
gboolean qt (gboolean, gint, gint, gboolean, Gtk::Tooltip*, gpointer)
{
return FALSE;
}
ShuttleControl::ShuttleControl ()
: _controllable (new ShuttleControllable (*this))
, binding_proxy (_controllable)
{
ARDOUR_UI::instance()->set_tip (*this, _("Shuttle speed control (Context-click for options)"));
pattern = 0;
shine_pattern = 0;
last_shuttle_request = 0;
last_speed_displayed = -99999999;
shuttle_grabbed = false;
shuttle_speed_on_grab = 0;
shuttle_fract = 0.0;
shuttle_max_speed = 8.0f;
shuttle_style_menu = 0;
shuttle_unit_menu = 0;
shuttle_context_menu = 0;
_hovering = false;
set_flags (CAN_FOCUS);
add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
set_size_request (85, 20);
set_name (X_("ShuttleControl"));
Config->ParameterChanged.connect (parameter_connection, MISSING_INVALIDATOR, boost::bind (&ShuttleControl::parameter_changed, this, _1), gui_context());
/* gtkmm 2.4: the C++ wrapper doesn't work */
g_signal_connect ((GObject*) gobj(), "query-tooltip", G_CALLBACK (qt), NULL);
// signal_query_tooltip().connect (sigc::mem_fun (*this, &ShuttleControl::on_query_tooltip));
}
ShuttleControl::~ShuttleControl ()
{
cairo_pattern_destroy (pattern);
cairo_pattern_destroy (shine_pattern);
}
void
ShuttleControl::set_session (Session *s)
{
SessionHandlePtr::set_session (s);
if (_session) {
set_sensitive (true);
_session->add_controllable (_controllable);
} else {
set_sensitive (false);
}
}
void
ShuttleControl::on_size_allocate (Gtk::Allocation& alloc)
{
if (pattern) {
cairo_pattern_destroy (pattern);
pattern = 0;
cairo_pattern_destroy (shine_pattern);
shine_pattern = 0;
}
CairoWidget::on_size_allocate ( alloc);
//background
pattern = cairo_pattern_create_linear (0, 0, 0, alloc.get_height());
uint32_t col = ARDOUR_UI::config()->color ("shuttle");
int r,b,g,a;
UINT_TO_RGBA(col, &r, &g, &b, &a);
cairo_pattern_add_color_stop_rgb (pattern, 0.0, r/400.0, g/400.0, b/400.0);
cairo_pattern_add_color_stop_rgb (pattern, 0.4, r/255.0, g/255.0, b/255.0);
cairo_pattern_add_color_stop_rgb (pattern, 1.0, r/512.0, g/512.0, b/512.0);
//reflection
shine_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, 10);
cairo_pattern_add_color_stop_rgba (shine_pattern, 0, 1,1,1,0.0);
cairo_pattern_add_color_stop_rgba (shine_pattern, 0.2, 1,1,1,0.4);
cairo_pattern_add_color_stop_rgba (shine_pattern, 1, 1,1,1,0.1);
}
void
ShuttleControl::map_transport_state ()
{
float speed = _session->transport_speed ();
if ( (fabsf( speed - last_speed_displayed) < 0.005f) // dead-zone
&& !( speed == 1.f && last_speed_displayed != 1.f)
&& !( speed == 0.f && last_speed_displayed != 0.f)
)
{
return; // nothing to see here, move along.
}
// Q: is there a good reason why we re-calculate this every time?
if (fabs(speed) <= (2*DBL_EPSILON)) {
shuttle_fract = 0;
} else {
if (Config->get_shuttle_units() == Semitones) {
bool reverse;
int semi = speed_as_semitones (speed, reverse);
shuttle_fract = semitones_as_fract (semi, reverse);
} else {
shuttle_fract = speed/shuttle_max_speed;
}
}
queue_draw ();
}
void
ShuttleControl::build_shuttle_context_menu ()
{
using namespace Menu_Helpers;
shuttle_context_menu = new Menu();
MenuList& items = shuttle_context_menu->items();
Menu* speed_menu = manage (new Menu());
MenuList& speed_items = speed_menu->items();
Menu* units_menu = manage (new Menu);
MenuList& units_items = units_menu->items();
RadioMenuItem::Group units_group;
units_items.push_back (RadioMenuElem (units_group, _("Percent"), sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_units), Percentage)));
if (Config->get_shuttle_units() == Percentage) {
static_cast<RadioMenuItem*>(&units_items.back())->set_active();
}
units_items.push_back (RadioMenuElem (units_group, _("Semitones"), sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_units), Semitones)));
if (Config->get_shuttle_units() == Semitones) {
static_cast<RadioMenuItem*>(&units_items.back())->set_active();
}
items.push_back (MenuElem (_("Units"), *units_menu));
Menu* style_menu = manage (new Menu);
MenuList& style_items = style_menu->items();
RadioMenuItem::Group style_group;
style_items.push_back (RadioMenuElem (style_group, _("Sprung"), sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_style), Sprung)));
if (Config->get_shuttle_behaviour() == Sprung) {
static_cast<RadioMenuItem*>(&style_items.back())->set_active();
}
style_items.push_back (RadioMenuElem (style_group, _("Wheel"), sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_style), Wheel)));
if (Config->get_shuttle_behaviour() == Wheel) {
static_cast<RadioMenuItem*>(&style_items.back())->set_active();
}
items.push_back (MenuElem (_("Mode"), *style_menu));
RadioMenuItem::Group speed_group;
speed_items.push_back (RadioMenuElem (speed_group, "8", sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_max_speed), 8.0f)));
if (shuttle_max_speed == 8.0) {
static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();
}
speed_items.push_back (RadioMenuElem (speed_group, "6", sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_max_speed), 6.0f)));
if (shuttle_max_speed == 6.0) {
static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();
}
speed_items.push_back (RadioMenuElem (speed_group, "4", sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_max_speed), 4.0f)));
if (shuttle_max_speed == 4.0) {
static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();
}
speed_items.push_back (RadioMenuElem (speed_group, "3", sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_max_speed), 3.0f)));
if (shuttle_max_speed == 3.0) {
static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();
}
speed_items.push_back (RadioMenuElem (speed_group, "2", sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_max_speed), 2.0f)));
if (shuttle_max_speed == 2.0) {
static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();
}
speed_items.push_back (RadioMenuElem (speed_group, "1.5", sigc::bind (sigc::mem_fun (*this, &ShuttleControl::set_shuttle_max_speed), 1.5f)));
if (shuttle_max_speed == 1.5) {
static_cast<RadioMenuItem*>(&speed_items.back())->set_active ();
}
items.push_back (MenuElem (_("Maximum speed"), *speed_menu));
}
void
ShuttleControl::show_shuttle_context_menu ()
{
if (shuttle_context_menu == 0) {
build_shuttle_context_menu ();
}
shuttle_context_menu->popup (1, gtk_get_current_event_time());
}
void
ShuttleControl::set_shuttle_max_speed (float speed)
{
shuttle_max_speed = speed;
last_speed_displayed = -99999999;
}
bool
ShuttleControl::on_button_press_event (GdkEventButton* ev)
{
if (!_session) {
return true;
}
if (binding_proxy.button_press_handler (ev)) {
return true;
}
if (Keyboard::is_context_menu_event (ev)) {
show_shuttle_context_menu ();
return true;
}
switch (ev->button) {
case 1:
if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
if (_session->transport_rolling()) {
_session->request_transport_speed (1.0);
}
} else {
add_modal_grab ();
shuttle_grabbed = true;
shuttle_speed_on_grab = _session->transport_speed ();
mouse_shuttle (ev->x, true);
gdk_pointer_grab(ev->window,false,
GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
NULL,NULL,ev->time);
}
break;
case 2:
case 3:
return true;
break;
}
return true;
}
bool
ShuttleControl::on_button_release_event (GdkEventButton* ev)
{
if (!_session) {
return true;
}
switch (ev->button) {
case 1:
if (shuttle_grabbed) {
shuttle_grabbed = false;
remove_modal_grab ();
gdk_pointer_ungrab (GDK_CURRENT_TIME);
if (Config->get_shuttle_behaviour() == Sprung) {
if (shuttle_speed_on_grab == 0 ) {
_session->request_transport_speed (1.0);
}
_session->request_transport_speed (shuttle_speed_on_grab);
} else {
mouse_shuttle (ev->x, true);
}
}
return true;
case 2:
if (_session->transport_rolling()) {
_session->request_transport_speed (1.0, Config->get_shuttle_behaviour() == Wheel);
}
return true;
case 3:
default:
return true;
}
return true;
}
bool
ShuttleControl::on_query_tooltip (int, int, bool, const Glib::RefPtr<Gtk::Tooltip>&)
{
return false;
}
bool
ShuttleControl::on_scroll_event (GdkEventScroll* ev)
{
if (!_session || Config->get_shuttle_behaviour() != Wheel) {
return true;
}
bool semis = (Config->get_shuttle_units() == Semitones);
switch (ev->direction) {
case GDK_SCROLL_UP:
case GDK_SCROLL_RIGHT:
if (semis) {
if (shuttle_fract == 0) {
shuttle_fract = semitones_as_fract (1, false);
} else {
bool rev;
int st = fract_as_semitones (shuttle_fract, rev);
shuttle_fract = semitones_as_fract (st + 1, rev);
}
} else {
shuttle_fract += 0.00125;
}
break;
case GDK_SCROLL_DOWN:
case GDK_SCROLL_LEFT:
if (semis) {
if (shuttle_fract == 0) {
shuttle_fract = semitones_as_fract (1, true);
} else {
bool rev;
int st = fract_as_semitones (shuttle_fract, rev);
shuttle_fract = semitones_as_fract (st - 1, rev);
}
} else {
shuttle_fract -= 0.00125;
}
break;
default:
return false;
}
if (semis) {
float lower_side_of_dead_zone = semitones_as_fract (-24, true);
float upper_side_of_dead_zone = semitones_as_fract (-24, false);
/* if we entered the "dead zone" (-24 semitones in forward or reverse), jump
to the far side of it.
*/
if (shuttle_fract > lower_side_of_dead_zone && shuttle_fract < upper_side_of_dead_zone) {
switch (ev->direction) {
case GDK_SCROLL_UP:
case GDK_SCROLL_RIGHT:
shuttle_fract = upper_side_of_dead_zone;
break;
case GDK_SCROLL_DOWN:
case GDK_SCROLL_LEFT:
shuttle_fract = lower_side_of_dead_zone;
break;
default:
/* impossible, checked above */
return false;
}
}
}
use_shuttle_fract (true);
return true;
}
bool
ShuttleControl::on_motion_notify_event (GdkEventMotion* ev)
{
if (!_session || !shuttle_grabbed) {
return true;
}
return mouse_shuttle (ev->x, false);
}
gint
ShuttleControl::mouse_shuttle (double x, bool force)
{
double const center = get_width() / 2.0;
double distance_from_center = x - center;
if (distance_from_center > 0) {
distance_from_center = min (distance_from_center, center);
} else {
distance_from_center = max (distance_from_center, -center);
}
/* compute shuttle fract as expressing how far between the center
and the edge we are. positive values indicate we are right of
center, negative values indicate left of center
*/
shuttle_fract = distance_from_center / center; // center == half the width
use_shuttle_fract (force);
return true;
}
void
ShuttleControl::set_shuttle_fract (double f, bool zero_ok)
{
shuttle_fract = f;
use_shuttle_fract (false, zero_ok);
}
int
ShuttleControl::speed_as_semitones (float speed, bool& reverse)
{
assert (speed != 0.0);
if (speed < 0.0) {
reverse = true;
return (int) round (12.0 * fast_log2 (-speed));
} else {
reverse = false;
return (int) round (12.0 * fast_log2 (speed));
}
}
float
ShuttleControl::semitones_as_speed (int semi, bool reverse)
{
if (reverse) {
return -pow (2.0, (semi / 12.0));
} else {
return pow (2.0, (semi / 12.0));
}
}
float
ShuttleControl::semitones_as_fract (int semi, bool reverse)
{
float speed = semitones_as_speed (semi, reverse);
return speed/4.0; /* 4.0 is the maximum speed for a 24 semitone shift */
}
int
ShuttleControl::fract_as_semitones (float fract, bool& reverse)
{
assert (fract != 0.0);
return speed_as_semitones (fract * 4.0, reverse);
}
void
ShuttleControl::use_shuttle_fract (bool force, bool zero_ok)
{
microseconds_t now = get_microseconds();
shuttle_fract = max (-1.0f, shuttle_fract);
shuttle_fract = min (1.0f, shuttle_fract);
/* do not attempt to submit a motion-driven transport speed request
more than once per process cycle.
*/
if (!force && (last_shuttle_request - now) < (microseconds_t) AudioEngine::instance()->usecs_per_cycle()) {
return;
}
last_shuttle_request = now;
double speed = 0;
if (Config->get_shuttle_units() == Semitones) {
if (shuttle_fract != 0.0) {
bool reverse;
int semi = fract_as_semitones (shuttle_fract, reverse);
speed = semitones_as_speed (semi, reverse);
} else {
speed = 0.0;
}
} else {
speed = shuttle_max_speed * shuttle_fract;
}
if (zero_ok) {
_session->request_transport_speed (speed, Config->get_shuttle_behaviour() == Wheel);
} else {
_session->request_transport_speed_nonzero (speed, Config->get_shuttle_behaviour() == Wheel);
}
}
void
ShuttleControl::render (cairo_t* cr, cairo_rectangle_t*)
{
cairo_text_extents_t extents;
//black border
cairo_set_source_rgb (cr, 0, 0.0, 0.0);
rounded_rectangle (cr, 0, 0, get_width(), get_height(), 4);
cairo_fill (cr);
float speed = 0.0;
if (_session) {
speed = _session->transport_speed ();
}
/* Marker */
float visual_fraction = std::min (1.0f, speed / shuttle_max_speed);
float marker_size = get_height() - 5.0;
float avail_width = get_width() - marker_size - 4;
float x = get_width() * 0.5 + visual_fraction * avail_width * 0.5;
// cairo_set_source_rgb (cr, 0, 1, 0.0);
cairo_set_source (cr, pattern);
if (speed == 1.0) {
cairo_move_to( cr, x, 2.5);
cairo_line_to( cr, x + marker_size * .577, 2.5 + marker_size * 0.5);
cairo_line_to( cr, x, 2.5 + marker_size);
cairo_close_path(cr);
} else if ( speed ==0.0 )
rounded_rectangle (cr, x, 2.5, marker_size, marker_size, 1);
else
cairo_arc (cr, x, 2.5 + marker_size * .5, marker_size * 0.47, 0, 2.0 * M_PI);
cairo_set_line_width (cr, 1.75);
cairo_stroke (cr);
/* speed text */
char buf[32];
if (speed != 0) {
if (Config->get_shuttle_units() == Percentage) {
if (speed == 1.0) {
snprintf (buf, sizeof (buf), "%s", _("Playing"));
} else {
if (speed < 0.0) {
snprintf (buf, sizeof (buf), "<<< %.1f%%", -speed * 100.f);
} else {
snprintf (buf, sizeof (buf), ">>> %.1f%%", speed * 100.f);
}
}
} else {
bool reversed;
int semi = speed_as_semitones (speed, reversed);
if (reversed) {
snprintf (buf, sizeof (buf), _("<<< %+d semitones"), semi);
} else {
snprintf (buf, sizeof (buf), _(">>> %+d semitones"), semi);
}
}
} else {
snprintf (buf, sizeof (buf), "%s", _("Stopped"));
}
last_speed_displayed = speed;
// TODO use a proper pango layout, scale font
cairo_set_source_rgb (cr, 0.6, 0.6, 0.6);
cairo_set_font_size (cr, 13.0);
cairo_text_extents (cr, "0|", &extents); // note the descender
const float text_ypos = (get_height() + extents.height - 1.) * .5;
cairo_move_to (cr, 10, text_ypos);
cairo_show_text (cr, buf);
/* style text */
switch (Config->get_shuttle_behaviour()) {
case Sprung:
snprintf (buf, sizeof (buf), "%s", _("Sprung"));
break;
case Wheel:
snprintf (buf, sizeof (buf), "%s", _("Wheel"));
break;
}
cairo_text_extents (cr, buf, &extents);
cairo_move_to (cr, get_width() - (fabs(extents.x_advance) + 5), text_ypos);
cairo_show_text (cr, buf);
if (ARDOUR_UI::config()->get_widget_prelight()) {
if (_hovering) {
rounded_rectangle (cr, 1, 1, get_width()-2, get_height()-2, 4.0);
cairo_set_source_rgba (cr, 1, 1, 1, 0.2);
cairo_fill (cr);
}
}
}
void
ShuttleControl::shuttle_unit_clicked ()
{
if (shuttle_unit_menu == 0) {
shuttle_unit_menu = dynamic_cast<Menu*> (ActionManager::get_widget ("/ShuttleUnitPopup"));
}
shuttle_unit_menu->popup (1, gtk_get_current_event_time());
}
void
ShuttleControl::set_shuttle_style (ShuttleBehaviour s)
{
Config->set_shuttle_behaviour (s);
}
void
ShuttleControl::set_shuttle_units (ShuttleUnits s)
{
Config->set_shuttle_units (s);
}
ShuttleControl::ShuttleControllable::ShuttleControllable (ShuttleControl& s)
: PBD::Controllable (X_("Shuttle"))
, sc (s)
{
}
void
ShuttleControl::ShuttleControllable::set_value (double val)
{
sc.set_shuttle_fract ((val - lower()) / (upper() - lower()), true);
}
double
ShuttleControl::ShuttleControllable::get_value () const
{
return lower() + (sc.get_shuttle_fract () * (upper() - lower()));
}
void
ShuttleControl::parameter_changed (std::string p)
{
if (p == "shuttle-behaviour") {
switch (Config->get_shuttle_behaviour ()) {
case Sprung:
/* back to Sprung - reset to speed = 1.0 if playing
*/
if (_session) {
if (_session->transport_rolling()) {
if (_session->transport_speed() == 1.0) {
queue_draw ();
} else {
/* reset current speed and
revert to 1.0 as the default
*/
_session->request_transport_speed (1.0);
/* redraw when speed changes */
}
} else {
queue_draw ();
}
}
break;
case Wheel:
queue_draw ();
break;
}
} else if (p == "shuttle-units") {
queue_draw ();
}
}
bool
ShuttleControl::on_enter_notify_event (GdkEventCrossing* ev)
{
_hovering = true;
if (ARDOUR_UI::config()->get_widget_prelight()) {
queue_draw ();
}
return CairoWidget::on_enter_notify_event (ev);
}
bool
ShuttleControl::on_leave_notify_event (GdkEventCrossing* ev)
{
_hovering = false;
if (ARDOUR_UI::config()->get_widget_prelight()) {
queue_draw ();
}
return CairoWidget::on_leave_notify_event (ev);
}
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