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livetrax/gtk2_ardour/panner2d.cc

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/*
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 <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 sigc;
using namespace ARDOUR;
using namespace PBD;
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 ? strdup (txt) : 0)
{
azimuth.set_value ((random() / (double) INT_MAX) * (2.0 * M_PI));
}
Panner2d::Target::~Target ()
{
if (text) {
free (text);
}
}
void
Panner2d::Target::set_text (const char* txt)
{
if (text) {
free (text);
}
text = strdup (txt);
}
Panner2d::Panner2d (Panner& p, int32_t h)
: panner (p), width (0), height (h)
{
allow_x = false;
allow_y = false;
allow_target = false;
panner.StateChanged.connect (mem_fun(*this, &Panner2d::handle_state_change));
panner.Changed.connect (mem_fun(*this, &Panner2d::handle_position_change));
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->second;
}
}
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);
}
while (pucks.size() > n_inputs) {
pucks.erase (pucks.begin());
}
for (Targets::iterator x = pucks.begin(); x != pucks.end(); ++x) {
(*x).second->visible = false;
}
switch (n_inputs) {
case 0:
break;
case 1:
pucks[0]->set_text ("");
pucks[0]->x.set_value (0.0);
pucks[0]->y.set_value (0.5);
pucks[0]->visible = true;
break;
case 2:
pucks[0]->set_text ("R");
if (existing_pucks < 0) {
pucks[0]->x.set_value (0.5f);
pucks[1]->y.set_value (0.25f);
}
pucks[0]->visible = true;
pucks[1]->set_text ("L");
if (existing_pucks < 2) {
pucks[1]->x.set_value (0.25f);
pucks[1]->y.set_value (0.5f);
}
pucks[1]->visible = true;
break;
default:
for (uint32_t i = 0; i < n_inputs; ++i) {
char buf[64];
snprintf (buf, sizeof (buf), "%" PRIu32, i);
pucks[i]->set_text (buf);
if (existing_pucks < i) {
float x, y;
panner.streampanner (i).get_position (x, y);
pucks[i]->x.set_value (x);
pucks[i]->y.set_value (y);
}
pucks[i]->visible = true;
}
break;
}
/* add all outputs */
while (targets.size() < panner.nouts()) {
add_target (0.0, 0.0);
}
while (targets.size() > panner.nouts()) {
targets.erase (targets.begin());
}
for (Targets::iterator x = targets.begin(); x != targets.end(); ++x) {
(*x).second->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)
{
Target* puck = new Target (x, y, text);
pair<int,Target *> newpair;
newpair.first = pucks.size();
newpair.second = puck;
pucks.insert (newpair);
puck->visible = true;
return 0;
}
int
Panner2d::add_target (float x, float y)
{
Target *target = new Target (x, y, "");
pair<int,Target *> newpair;
newpair.first = targets.size();
newpair.second = target;
targets.insert (newpair);
target->visible = true;
queue_draw ();
return newpair.first;
}
void
Panner2d::drop_targets ()
{
for (Targets::iterator i = targets.begin(); i != targets.end(); ) {
Targets::iterator tmp;
tmp = i;
++tmp;
delete i->second;
targets.erase (i);
i = tmp;
}
queue_draw ();
}
void
Panner2d::remove_target (int which)
{
Targets::iterator i = targets.find (which);
if (i != targets.end()) {
delete i->second;
targets.erase (i);
queue_draw ();
}
}
void
Panner2d::handle_state_change ()
{
ENSURE_GUI_THREAD(mem_fun(*this, &Panner2d::handle_state_change));
queue_draw ();
}
void
Panner2d::handle_position_change ()
{
uint32_t n;
ENSURE_GUI_THREAD(mem_fun(*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_target (int which, float x, float y)
{
Targets::iterator i = targets.find (which);
Target *target;
if (!allow_target) {
return;
}
if (i != targets.end()) {
target = i->second;
target->x.set_value (x);
target->y.set_value (y);
queue_draw ();
}
}
void
Panner2d::move_puck (int which, float x, float y)
{
Targets::iterator i = pucks.find (which);
Target *target;
if (i != pucks.end()) {
target = i->second;
target->x.set_value (x);
target->y.set_value (y);
queue_draw ();
}
}
void
Panner2d::show_puck (int which)
{
Targets::iterator i = pucks.find (which);
if (i != pucks.end()) {
Target* puck = i->second;
if (!puck->visible) {
puck->visible = true;
queue_draw ();
}
}
}
void
Panner2d::hide_puck (int which)
{
Targets::iterator i = pucks.find (which);
if (i != pucks.end()) {
Target* puck = i->second;
if (!puck->visible) {
puck->visible = false;
queue_draw ();
}
}
}
void
Panner2d::show_target (int which)
{
Targets::iterator i = targets.find (which);
if (i != targets.end()) {
if (!i->second->visible) {
i->second->visible = true;
queue_draw ();
}
}
}
void
Panner2d::hide_target (int which)
{
Targets::iterator i = targets.find (which);
if (i != targets.end()) {
if (i->second->visible) {
i->second->visible = false;
queue_draw ();
}
}
}
Panner2d::Target *
Panner2d::find_closest_object (gdouble x, gdouble y, int& which, bool& is_puck) const
{
gdouble efx, efy;
gdouble cx, cy;
Target *closest = 0;
Target *candidate;
float distance;
float best_distance = FLT_MAX;
int pwhich;
efx = x/width;
efy = y/height;
which = 0;
pwhich = 0;
is_puck = false;
for (Targets::const_iterator i = targets.begin(); i != targets.end(); ++i, ++which) {
candidate = i->second;
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;
}
}
for (Targets::const_iterator i = pucks.begin(); i != pucks.end(); ++i, ++pwhich) {
candidate = i->second;
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;
is_puck = true;
which = pwhich;
}
}
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);
}
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, height+0.5, height/2+0.5);
cairo_stroke (cr);
cairo_move_to (cr, height/2+0.5, 0.5);
cairo_line_to (cr, height/2+0.5, height+0.5);
cairo_stroke (cr);
cairo_arc (cr, height/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->second;
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 (puck->y.get_value(), 1.0);
fy = max (fy, -1.0f);
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);
/* arrow */
if (height > 100.0f) {
float endx, endy;
endx = x;
endy = y;
cairo_save (cr);
cairo_translate (cr, x, y);
cairo_rotate (cr, puck->azimuth.get_value());
/* horizontal left-to-right line (rotation will rotate it, duh) */
endx = 30.0;
endy = 0.0;
/* stem */
cairo_set_line_width (cr, 4.0);
cairo_move_to (cr, 0.0, 0.0);
cairo_line_to (cr, endx, endy);
cairo_stroke (cr);
/* arrow head */
cairo_move_to (cr, endx - 10.0, endy + 10.0);
cairo_line_to (cr, endx, endy);
cairo_line_to (cr, endx - 10.0, endy - 10.0);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_stroke (cr);
cairo_restore (cr);
}
cairo_move_to (cr, x + 6, y + 6);
cairo_show_text (cr, puck->text);
}
}
/* redraw any visible targets */
int n = 0;
for (Targets::iterator i = targets.begin(); i != targets.end(); ++i) {
Target *target = i->second;
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:
drag_target = find_closest_object (ev->x, ev->y, drag_index, drag_is_puck);
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 (drag_is_puck && (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 (drag_is_puck && (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;
}
int x, y;
bool need_move = false;
if (!drag_is_puck && !allow_target) {
cerr << "dip = " << drag_is_puck << " at = " << allow_target << endl;
return true;
}
if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
if (allow_x || !drag_is_puck) {
float new_x;
x = min (evx, width - 1);
x = max (x, 0);
new_x = (float) x / (width - 1);
if (new_x != drag_target->x.get_value()) {
drag_target->x.set_value (new_x);
need_move = true;
}
}
if (allow_y || drag_is_puck) {
float new_y;
y = min (evy, height - 1);
y = max (y, 0);
new_y = (float) y / (height - 1);
if (new_y != drag_target->y.get_value()) {
drag_target->y.set_value (new_y);
need_move = true;
}
}
if (need_move) {
if (drag_is_puck) {
panner.streampanner(drag_index).set_position (drag_target->x.get_value(), drag_target->y.get_value(), false);
} else {
TargetMoved (drag_index);
}
queue_draw ();
}
} else if ((state & GDK_BUTTON2_MASK) && !(state & GDK_BUTTON1_MASK)) {
if (!drag_is_puck) {
return false;
}
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::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 (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());
}
}