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livetrax/gtk2_ardour/shuttle_control.cc
Paul Davis 80e9eb09dd several tweaks/fixes to the shuttle control 
git-svn-id: svn://localhost/ardour2/branches/3.0@9395 d708f5d6-7413-0410-9779-e7cbd77b26cf
2011-04-20 22:53:41 +00:00

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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/cairo.h>
#include <pbd/stacktrace.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 "ardour_ui.h"
#include "shuttle_control.h"
using namespace Gtk;
using namespace Gtkmm2ext;
using namespace ARDOUR;
using std::min;
using std::max;
ShuttleControl::ShuttleControl ()
: _controllable (new ShuttleControllable (*this))
, binding_proxy (_controllable)
{
ARDOUR_UI::instance()->set_tip (*this, _("Shuttle speed control (Context-click for options)"));
pattern = 0;
last_shuttle_request = 0;
last_speed_displayed = -99999999;
shuttle_grabbed = false;
shuttle_fract = 0.0;
shuttle_max_speed = 8.0f;
shuttle_style_menu = 0;
shuttle_unit_menu = 0;
shuttle_context_menu = 0;
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 (100, 15);
set_name (X_("ShuttleControl"));
Config->ParameterChanged.connect (parameter_connection, MISSING_INVALIDATOR, ui_bind (&ShuttleControl::parameter_changed, this, _1), gui_context());
signal_query_tooltip().connect (sigc::mem_fun (*this, &ShuttleControl::on_query_tooltip));
}
ShuttleControl::~ShuttleControl ()
{
cairo_pattern_destroy (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;
}
pattern = cairo_pattern_create_linear (0, 0, alloc.get_width(), alloc.get_height());
/* add 3 color stops */
cairo_pattern_add_color_stop_rgb (pattern, 0.0, 0, 0, 0);
cairo_pattern_add_color_stop_rgb (pattern, 0.5, 0.0, 0.0, 1.0);
cairo_pattern_add_color_stop_rgb (pattern, 1.0, 0, 0, 0);
DrawingArea::on_size_allocate (alloc);
}
void
ShuttleControl::map_transport_state ()
{
float speed = _session->transport_speed ();
if (speed != 0.0) {
if (Config->get_shuttle_units() == Semitones) {
shuttle_fract = speed/2.0;
} else {
shuttle_fract = speed/shuttle_max_speed;
}
} else {
shuttle_fract = 0;
}
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;
}
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:
add_modal_grab ();
shuttle_grabbed = true;
mouse_shuttle (ev->x, true);
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:
mouse_shuttle (ev->x, true);
shuttle_grabbed = false;
remove_modal_grab ();
if (Config->get_shuttle_behaviour() == Sprung) {
if (_session->config.get_auto_play()) {
shuttle_fract = SHUTTLE_FRACT_SPEED1;
_session->request_transport_speed (1.0);
} else {
shuttle_fract = 0;
_session->request_transport_speed (0.0);
}
queue_draw ();
}
return true;
case 2:
if (_session->transport_rolling()) {
shuttle_fract = SHUTTLE_FRACT_SPEED1;
_session->request_transport_speed (1.0);
} else {
shuttle_fract = 0;
}
queue_draw ();
return true;
case 3:
default:
return true;
}
use_shuttle_fract (true);
return true;
}
bool
ShuttleControl::on_query_tooltip (int, int, bool, const Glib::RefPtr<Gtk::Tooltip>&)
{
std::cerr << "OQT!\n";
return false;
}
bool
ShuttleControl::on_scroll_event (GdkEventScroll* ev)
{
if (!_session || Config->get_shuttle_behaviour() != Wheel) {
return true;
}
switch (ev->direction) {
case GDK_SCROLL_UP:
case GDK_SCROLL_RIGHT:
shuttle_fract += 0.005;
break;
case GDK_SCROLL_DOWN:
case GDK_SCROLL_LEFT:
shuttle_fract -= 0.005;
break;
default:
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 half_width = get_width() / 2.0;
double distance = x - half_width;
if (distance > 0) {
distance = min (distance, half_width);
} else {
distance = max (distance, -half_width);
}
shuttle_fract = distance / half_width;
use_shuttle_fract (force);
return true;
}
void
ShuttleControl::set_shuttle_fract (double f)
{
shuttle_fract = f;
use_shuttle_fract (false);
}
void
ShuttleControl::use_shuttle_fract (bool force)
{
microseconds_t now = get_microseconds();
/* 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) {
double const step = 1.0 / 24.0; // range is 24 semitones up & down
double const semitones = round (shuttle_fract / step);
speed = pow (2.0, (semitones / 12.0));
} else {
speed = shuttle_max_speed * shuttle_fract;
}
_session->request_transport_speed_nonzero (speed);
}
bool
ShuttleControl::on_expose_event (GdkEventExpose* event)
{
cairo_text_extents_t extents;
Glib::RefPtr<Gdk::Window> win (get_window());
Glib::RefPtr<Gtk::Style> style (get_style());
cairo_t* cr = gdk_cairo_create (win->gobj());
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 0.0, 0.0, get_width(), get_height());
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0, 0, 0.0);
cairo_stroke (cr);
float speed = 0.0;
if (_session) {
speed = _session->transport_speed ();
}
/* Marker */
double visual_fraction = std::min (1.0f, speed/shuttle_max_speed);
double x = (get_width() / 2.0) + (0.5 * (get_width() * visual_fraction));
cairo_move_to (cr, x, 0);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_line_to (cr, x, get_height());
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), _("Playing"));
} else {
snprintf (buf, sizeof (buf), "%d%%", (int) round (speed * 100));
}
} else {
if (speed < 0) {
snprintf (buf, sizeof (buf), "-%d semitones", (int) round (12.0 * fast_log2 (-speed)));
} else {
snprintf (buf, sizeof (buf), "+%d semitones", (int) round (12.0 * fast_log2 (speed)));
}
}
} else {
snprintf (buf, sizeof (buf), _("Stopped"));
}
last_speed_displayed = speed;
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_text_extents (cr, buf, &extents);
cairo_move_to (cr, 10, extents.height + 2);
cairo_show_text (cr, buf);
/* style text */
switch (Config->get_shuttle_behaviour()) {
case Sprung:
snprintf (buf, sizeof (buf), _("Sprung"));
break;
case Wheel:
snprintf (buf, sizeof (buf), _("Wheel"));
break;
}
cairo_text_extents (cr, buf, &extents);
cairo_move_to (cr, get_width() - (fabs(extents.x_advance) + 5), extents.height + 2);
cairo_show_text (cr, buf);
cairo_destroy (cr);
return true;
}
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);
}
void
ShuttleControl::update_speed_display ()
{
if (_session->transport_speed() != last_speed_displayed) {
queue_draw ();
}
}
ShuttleControl::ShuttleControllable::ShuttleControllable (ShuttleControl& s)
: PBD::Controllable (X_("Shuttle"))
, sc (s)
{
}
void
ShuttleControl::ShuttleControllable::set_id (const std::string& str)
{
_id = str;
}
void
ShuttleControl::ShuttleControllable::set_value (double val)
{
double fract;
if (val == 0.5) {
fract = 0.0;
} else {
if (val < 0.5) {
fract = -((0.5 - val)/0.5);
} else {
fract = ((val - 0.5)/0.5);
}
}
sc.set_shuttle_fract (fract);
}
double
ShuttleControl::ShuttleControllable::get_value () const
{
return sc.get_shuttle_fract ();
}
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 {
_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 ();
}
}
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