ardour/livetrax
13
0
Fork 0
Code
1b2b21169c
livetrax/gtk2_ardour/panner2d.cc
Paul Davis 1b2b21169c semi-functioning vbap panning, still not done 
git-svn-id: svn://localhost/ardour2/branches/3.0@8074 d708f5d6-7413-0410-9779-e7cbd77b26cf
2010-11-23 16:38:17 +00:00

710 lines
15 KiB
C++
Raw Blame History

/*
Copyright (C) 2002 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 <cmath>
#include <climits>
#include <string.h>
#include <cairo.h>
#include <gtkmm/menu.h>
#include "pbd/error.h"
#include "pbd/cartesian.h"
#include "ardour/panner.h"
#include <gtkmm2ext/gtk_ui.h>
#include "panner2d.h"
#include "keyboard.h"
#include "gui_thread.h"
#include "i18n.h"
using namespace std;
using namespace Gtk;
using namespace ARDOUR;
using namespace PBD;
using Gtkmm2ext::Keyboard;
Panner2d::Target::Target (float xa, float ya, const char *txt)
: x (xa, 0.0, 1.0, 0.01, 0.1)
, y (ya, 0.0, 1.0, 0.01, 0.1)
, azimuth (M_PI/2.0, 0.0, 2.0 * M_PI, 0.1, 0.5)
, text (txt)
, _selected (false)
{
azimuth.set_value ((random() / (double) INT_MAX) * (2.0 * M_PI));
}
Panner2d::Target::~Target ()
{
}
void
Panner2d::Target::set_text (const char* txt)
{
text = txt;
}
Panner2d::Panner2d (boost::shared_ptr<Panner> p, int32_t h)
: panner (p), width (0), height (h)
{
allow_x = false;
allow_y = false;
allow_target = false;
panner->StateChanged.connect (state_connection, invalidator (*this), boost::bind (&Panner2d::handle_state_change, this), gui_context());
panner->Changed.connect (change_connection, invalidator (*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
drag_target = 0;
set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
}
Panner2d::~Panner2d()
{
for (Targets::iterator i = targets.begin(); i != targets.end(); ++i) {
delete *i;
}
}
void
Panner2d::reset (uint32_t n_inputs)
{
Targets::size_type existing_pucks = pucks.size();
/* pucks */
while (pucks.size() < n_inputs) {
add_puck ("", 0.0, 0.0);
}
if (pucks.size() > n_inputs) {
for (uint32_t i = pucks.size(); i < n_inputs; ++i) {
delete pucks[i];
}
pucks.resize (n_inputs);
}
for (Targets::iterator x = pucks.begin(); x != pucks.end(); ++x) {
(*x)->visible = false;
}
switch (n_inputs) {
case 0:
break;
case 1:
pucks[0]->set_text ("");
break;
case 2:
pucks[0]->set_text ("R");
pucks[1]->set_text ("L");
break;
default:
for (uint32_t i = 0; i < n_inputs; ++i) {
char buf[64];
snprintf (buf, sizeof (buf), "%" PRIu32, i + 1);
pucks[i]->set_text (buf);
}
break;
}
for (uint32_t i = existing_pucks; i < n_inputs; ++i) {
float x, y;
double dx, dy;
panner->streampanner (i).get_position (x, y);
dx = x;
dy = y;
clamp_to_circle (dx, dy);
pucks[i]->x.set_value (dx);
pucks[i]->y.set_value (dy);
pucks[i]->visible = true;
}
/* add all outputs */
while (targets.size() < panner->nouts()) {
add_target (0.0, 0.0);
}
if (targets.size() > panner->nouts()) {
for (uint32_t i = panner->nouts(); i < targets.size(); ++i) {
delete targets[i];
}
targets.resize (panner->nouts ());
}
for (Targets::iterator x = targets.begin(); x != targets.end(); ++x) {
(*x)->visible = false;
}
for (uint32_t n = 0; n < panner->nouts(); ++n) {
char buf[16];
snprintf (buf, sizeof (buf), "%d", n+1);
targets[n]->set_text (buf);
targets[n]->x.set_value (panner->output(n).x);
targets[n]->y.set_value (panner->output(n).y);
targets[n]->visible = true;
}
allow_x_motion (true);
allow_y_motion (true);
allow_target_motion (true);
queue_draw ();
}
Gtk::Adjustment&
Panner2d::azimuth (uint32_t which)
{
assert (which < pucks.size());
return pucks[which]->azimuth;
}
void
Panner2d::on_size_allocate (Gtk::Allocation& alloc)
{
width = alloc.get_width();
height = alloc.get_height();
if (height > 100) {
width -= 20;
height -= 20;
}
DrawingArea::on_size_allocate (alloc);
}
int
Panner2d::add_puck (const char* text, float x, float y)
{
double dx, dy;
dx = x;
dy = y;
clamp_to_circle (dx, dy);
Target* puck = new Target (dx, dy, text);
pucks.push_back (puck);
puck->visible = true;
return 0;
}
int
Panner2d::add_target (float x, float y)
{
Target* target = new Target (x, y, "");
targets.push_back (target);
target->visible = true;
queue_draw ();
return targets.size() - 1;
}
void
Panner2d::handle_state_change ()
{
ENSURE_GUI_THREAD (*this, &Panner2d::handle_state_change)
queue_draw ();
}
void
Panner2d::handle_position_change ()
{
uint32_t n;
ENSURE_GUI_THREAD (*this, &Panner2d::handle_position_change)
for (n = 0; n < pucks.size(); ++n) {
float x, y;
panner->streampanner(n).get_position (x, y);
pucks[n]->x.set_value (x);
pucks[n]->y.set_value (y);
}
for (n = 0; n < targets.size(); ++n) {
targets[n]->x.set_value (panner->output(n).x);
targets[n]->y.set_value (panner->output(n).y);
}
queue_draw ();
}
void
Panner2d::move_puck (int which, float x, float y)
{
if (which >= int (targets.size())) {
return;
}
targets[which]->x.set_value (x);
targets[which]->y.set_value (y);
queue_draw ();
}
Panner2d::Target *
Panner2d::find_closest_object (gdouble x, gdouble y, int& which) const
{
gdouble efx, efy;
gdouble cx, cy;
Target *closest = 0;
Target *candidate;
float distance;
float best_distance = FLT_MAX;
int pwhich;
efx = x/(width-1.0);
efy = 1.0 - (y/(height-1.0)); /* convert from X Window origin */
which = 0;
pwhich = 0;
for (Targets::const_iterator i = pucks.begin(); i != pucks.end(); ++i, ++pwhich) {
candidate = *i;
cx = candidate->x.get_value();
cy = candidate->y.get_value();
distance = sqrt ((cx - efx) * (cx - efx) +
(cy - efy) * (cy - efy));
if (distance < best_distance) {
closest = candidate;
best_distance = distance;
which = pwhich;
}
}
if (best_distance > 0.05) { // arbitrary
return 0;
}
return closest;
}
bool
Panner2d::on_motion_notify_event (GdkEventMotion *ev)
{
gint x, y;
GdkModifierType state;
if (ev->is_hint) {
gdk_window_get_pointer (ev->window, &x, &y, &state);
} else {
x = (int) floor (ev->x);
y = (int) floor (ev->y);
state = (GdkModifierType) ev->state;
}
return handle_motion (x, y, state);
}
bool
Panner2d::on_expose_event (GdkEventExpose *event)
{
gint x, y;
float fx, fy;
cairo_t* cr;
cr = gdk_cairo_create (get_window()->gobj());
cairo_set_line_width (cr, 1.0);
cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
if (!panner->bypassed()) {
cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 1.0);
} else {
cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 0.2);
}
cairo_fill_preserve (cr);
cairo_clip (cr);
if (height > 100) {
cairo_translate (cr, 10.0, 10.0);
}
/* horizontal line of "crosshairs" */
cairo_set_source_rgb (cr, 0.0, 0.1, 0.7);
cairo_move_to (cr, 0.5, height/2.0+0.5);
cairo_line_to (cr, width+0.5, height/2+0.5);
cairo_stroke (cr);
/* vertical line of "crosshairs" */
cairo_move_to (cr, width/2+0.5, 0.5);
cairo_line_to (cr, width/2+0.5, height+0.5);
cairo_stroke (cr);
/* the circle on which signals live */
cairo_arc (cr, width/2, height/2, height/2, 0, 2.0 * M_PI);
cairo_stroke (cr);
if (!panner->bypassed()) {
float arc_radius;
cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
if (height < 100) {
cairo_set_font_size (cr, 10);
arc_radius = 2.0;
} else {
cairo_set_font_size (cr, 16);
arc_radius = 4.0;
}
for (Targets::iterator i = pucks.begin(); i != pucks.end(); ++i) {
Target* puck = *i;
if (puck->visible) {
/* redraw puck */
fx = min (puck->x.get_value(), 1.0);
fx = max (fx, -1.0f);
x = (gint) floor (width * fx - 4);
fy = min (fy, 1.0f);
fy = max (fy, -1.0f);
/* translate back to X Window abomination coordinates */
fy = -(puck->y.get_value() - 1.0);
y = (gint) floor (height * fy - 4);
cairo_arc (cr, x, y, arc_radius, 0, 2.0 * M_PI);
cairo_set_source_rgb (cr, 0.8, 0.2, 0.1);
cairo_close_path (cr);
cairo_fill (cr);
cairo_move_to (cr, x + 6, y + 6);
cairo_show_text (cr, puck->text.c_str());
}
}
/* redraw any visible targets */
int n = 0;
for (Targets::iterator i = targets.begin(); i != targets.end(); ++i) {
Target *target = *i;
char buf[256];
++n;
if (target->visible) {
fx = min (target->x.get_value(), 1.0);
fx = max (fx, -1.0f);
x = (gint) floor (width * fx);
fy = min (target->y.get_value(), 1.0);
fy = max (fy, -1.0f);
y = (gint) floor (height * fy);
snprintf (buf, sizeof (buf), "%d", n);
cairo_set_source_rgb (cr, 0.0, 0.8, 0.1);
cairo_rectangle (cr, x-2, y-2, 4, 4);
cairo_fill (cr);
cairo_move_to (cr, x+6, y+6);
cairo_show_text (cr, buf);
}
}
}
cairo_destroy (cr);
return TRUE;
}
bool
Panner2d::on_button_press_event (GdkEventButton *ev)
{
GdkModifierType state;
if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
return false;
}
switch (ev->button) {
case 1:
case 2:
if ((drag_target = find_closest_object (ev->x, ev->y, drag_index)) != 0) {
drag_target->set_selected (true);
}
drag_x = (int) floor (ev->x);
drag_y = (int) floor (ev->y);
state = (GdkModifierType) ev->state;
return handle_motion (drag_x, drag_y, state);
break;
default:
break;
}
return FALSE;
}
bool
Panner2d::on_button_release_event (GdkEventButton *ev)
{
gint x, y;
GdkModifierType state;
bool ret = false;
switch (ev->button) {
case 1:
x = (int) floor (ev->x);
y = (int) floor (ev->y);
state = (GdkModifierType) ev->state;
if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
for (Targets::iterator i = pucks.begin(); i != pucks.end(); ++i) {
//Target* puck = i->second;
/* XXX DO SOMETHING TO SET PUCK BACK TO "normal" */
}
queue_draw ();
PuckMoved (-1);
ret = true;
} else {
ret = handle_motion (x, y, state);
}
drag_target = 0;
break;
case 2:
x = (int) floor (ev->x);
y = (int) floor (ev->y);
state = (GdkModifierType) ev->state;
if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
toggle_bypass ();
ret = true;
} else {
ret = handle_motion (x, y, state);
}
drag_target = 0;
break;
case 3:
break;
}
return ret;
}
gint
Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
{
if (drag_target == 0) {
return false;
}
if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
return false;
}
if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
double fx = evx;
double fy = evy;
bool need_move = false;
clamp_to_circle (fx, fy);
if ((fx != drag_target->x.get_value()) || (fy != drag_target->y.get_value())) {
need_move = true;
}
if (need_move) {
drag_target->x.set_value (fx);
drag_target->y.set_value (fy);
panner->streampanner (drag_index).set_position (drag_target->x.get_value(), drag_target->y.get_value(), false);
queue_draw ();
}
} else if ((state & GDK_BUTTON2_MASK) && !(state & GDK_BUTTON1_MASK)) {
int xdelta = drag_x - evx;
int ydelta = drag_x - evy;
drag_target->azimuth.set_value (drag_target->azimuth.get_value() + (2 * M_PI) * ((float)ydelta)/height * ((float) -xdelta)/height);
queue_draw ();
}
return true;
}
void
Panner2d::cart_to_azi_ele (double x, double y, double& azi, double& ele)
{
x = min (x, (double) width);
x = max (x, 0.0);
x = x / (width-1.0);
y = min (y, (double) height);
y = max (y, 0.0);
y = y / (height-1.0);
/* at this point, new_x and new_y are in the range [ 0.0 .. 1.0 ], with
(0,0) at the upper left corner (thank you, X Window)
we need to translate to (0,0) at center
*/
x -= 0.5;
y = (1.0 - y) - 0.5;
PBD::cart_to_azi_ele (x, y, 0.0, azi, ele);
}
void
Panner2d::azi_ele_to_cart (double azi, double ele, double& x, double& y)
{
double z;
PBD::azi_ele_to_cart (azi, ele, x, y, z);
/* xp,yp,zp use a (0,0) == center and 2.0 unit dimension. so convert
back to (0,0) and 1.0 unit dimension
*/
x /= 2.0;
y /= 2.0;
z /= 2.0;
/* and now convert back to (0,0) == upper left corner */
x += 0.5;
y += 0.5;
z += 0.5;
}
void
Panner2d::clamp_to_circle (double& x, double& y)
{
double azi, ele;
cart_to_azi_ele (x, y, azi, ele);
azi_ele_to_cart (azi, ele, x, y);
}
void
Panner2d::toggle_bypass ()
{
panner->set_bypassed (!panner->bypassed());
}
void
Panner2d::allow_x_motion (bool yn)
{
allow_x = yn;
}
void
Panner2d::allow_target_motion (bool yn)
{
allow_target = yn;
}
void
Panner2d::allow_y_motion (bool yn)
{
allow_y = yn;
}
Panner2dWindow::Panner2dWindow (boost::shared_ptr<Panner> p, int32_t h, uint32_t inputs)
: widget (p, h)
, reset_button (_("Reset"))
, bypass_button (_("Bypass"))
, mute_button (_("Mute"))
{
widget.set_name ("MixerPanZone");
set_title (_("Panner"));
widget.set_size_request (h, h);
button_box.set_spacing (6);
button_box.pack_start (reset_button, false, false);
button_box.pack_start (bypass_button, false, false);
button_box.pack_start (mute_button, false, false);
spinner_box.set_spacing (6);
left_side.set_spacing (6);
left_side.pack_start (button_box, false, false);
left_side.pack_start (spinner_box, false, false);
reset_button.show ();
bypass_button.show ();
mute_button.show ();
button_box.show ();
spinner_box.show ();
left_side.show ();
hpacker.set_spacing (6);
hpacker.set_border_width (12);
hpacker.pack_start (widget, false, false);
hpacker.pack_start (left_side, false, false);
hpacker.show ();
add (hpacker);
reset (inputs);
widget.show ();
}
void
Panner2dWindow::reset (uint32_t n_inputs)
{
widget.reset (n_inputs);
while (spinners.size() < n_inputs) {
spinners.push_back (new Gtk::SpinButton (widget.azimuth (spinners.size())));
spinner_box.pack_start (*spinners.back(), false, false);
spinners.back()->set_digits (4);
spinners.back()->show ();
}
while (spinners.size() > n_inputs) {
spinner_box.remove (*spinners.back());
delete spinners.back();
spinners.erase (--spinners.end());
}
}
View Git Blame Copy Permalink