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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 <gtkmm/menu.h>
#include <gtkmm/checkmenuitem.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), y (ya), text (txt ? strdup (txt) : 0)
{
if (text) {
textlen = strlen (txt);
} else {
textlen = 0;
}
}
Panner2d::Target::~Target ()
{
if (text) {
free (text);
}
}
Panner2d::Panner2d (Panner& p, int32_t h)
: panner (p), width (0), height (h)
{
context_menu = 0;
bypass_menu_item = 0;
allow_x = false;
allow_y = false;
allow_target = false;
panner.StateChanged.connect (mem_fun(*this, &Panner2d::handle_state_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)
{
/* add pucks */
drop_pucks ();
switch (n_inputs) {
case 0:
break;
case 1:
add_puck ("", 0.0f, 0.5f);
break;
case 2:
add_puck ("L", 0.5f, 0.25f);
add_puck ("R", 0.25f, 0.5f);
show_puck (0);
show_puck (1);
break;
default:
for (uint32_t i = 0; i < n_inputs; ++i) {
char buf[64];
snprintf (buf, sizeof (buf), "%" PRIu32, i);
add_puck (buf, 0.0f, 0.5f);
show_puck (i);
}
break;
}
/* add all outputs */
drop_targets ();
for (uint32_t n = 0; n < panner.nouts(); ++n) {
add_target (panner.output (n).x, panner.output (n).y);
}
allow_x_motion (true);
allow_y_motion (true);
allow_target_motion (true);
}
void
Panner2d::on_size_allocate (Gtk::Allocation& alloc)
{
width = alloc.get_width();
height = alloc.get_height();
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::drop_pucks ()
{
for (Targets::iterator i = pucks.begin(); i != pucks.end(); ) {
Targets::iterator tmp;
tmp = i;
++tmp;
delete i->second;
pucks.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::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 = x;
target->y = 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 = x;
target->y = 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;
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;
distance = sqrt ((candidate->x - efx) * (candidate->x - efx) +
(candidate->y - efy) * (candidate->y - 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;
distance = sqrt ((candidate->x - efx) * (candidate->x - efx) +
(candidate->y - efy) * (candidate->y - 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);
}
gint
Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
{
if (drag_target == 0 || (state & GDK_BUTTON1_MASK) == 0) {
return FALSE;
}
int x, y;
bool need_move = false;
if (!drag_is_puck && !allow_target) {
return TRUE;
}
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) {
drag_target->x = 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) {
drag_target->y = new_y;
need_move = true;
}
}
if (need_move) {
queue_draw ();
if (drag_is_puck) {
panner[drag_index]->set_position (drag_target->x, drag_target->y);
} else {
TargetMoved (drag_index);
}
}
return TRUE;
}
bool
Panner2d::on_expose_event (GdkEventExpose *event)
{
gint x, y;
float fx, fy;
if (layout == 0) {
layout = create_pango_layout ("");
layout->set_font_description (get_style()->get_font());
}
/* redraw the background */
get_window()->draw_rectangle (get_style()->get_bg_gc(get_state()),
true,
event->area.x, event->area.y,
event->area.width, event->area.height);
if (!panner.bypassed()) {
for (Targets::iterator i = pucks.begin(); i != pucks.end(); ++i) {
Target* puck = i->second;
if (puck->visible) {
/* redraw puck */
fx = min (puck->x, 1.0f);
fx = max (fx, -1.0f);
x = (gint) floor (width * fx - 4);
fy = min (puck->y, 1.0f);
fy = max (fy, -1.0f);
y = (gint) floor (height * fy - 4);
get_window()->draw_arc (get_style()->get_fg_gc(Gtk::STATE_NORMAL),
true,
x, y,
8, 8,
0, 360 * 64);
layout->set_text (puck->text);
get_window()->draw_layout (get_style()->get_fg_gc (STATE_NORMAL), x+6, y+6, layout);
}
}
/* redraw any visible targets */
for (Targets::iterator i = targets.begin(); i != targets.end(); ++i) {
Target *target = i->second;
if (target->visible) {
/* why -8 ??? why is this necessary ? */
fx = min (target->x, 1.0f);
fx = max (fx, -1.0f);
x = (gint) floor ((width - 8) * fx);
fy = min (target->y, 1.0f);
fy = max (fy, -1.0f);
y = (gint) floor ((height - 8) * fy);
get_window()->draw_rectangle (get_style()->get_fg_gc(Gtk::STATE_ACTIVE),
true,
x, y,
4, 4);
}
}
}
return TRUE;
}
bool
Panner2d::on_button_press_event (GdkEventButton *ev)
{
switch (ev->button) {
case 1:
gint x, y;
GdkModifierType state;
drag_target = find_closest_object (ev->x, ev->y, drag_index, drag_is_puck);
x = (int) floor (ev->x);
y = (int) floor (ev->y);
state = (GdkModifierType) ev->state;
return handle_motion (x, y, state);
break;
default:
break;
}
return FALSE;
}
bool
Panner2d::on_button_release_event (GdkEventButton *ev)
{
switch (ev->button) {
case 1:
gint x, y;
int ret;
GdkModifierType state;
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;
puck->x = 0.5;
puck->y = 0.5;
}
queue_draw ();
PuckMoved (-1);
ret = TRUE;
} else {
ret = handle_motion (x, y, state);
}
drag_target = 0;
return ret;
break;
case 2:
toggle_bypass ();
return TRUE;
case 3:
show_context_menu ();
break;
}
return FALSE;
}
void
Panner2d::toggle_bypass ()
{
if (bypass_menu_item && (panner.bypassed() != bypass_menu_item->get_active())) {
panner.set_bypassed (!panner.bypassed());
}
}
void
Panner2d::show_context_menu ()
{
using namespace Menu_Helpers;
if (context_menu == 0) {
context_menu = manage (new Menu);
context_menu->set_name ("ArdourContextMenu");
MenuList& items = context_menu->items();
items.push_back (CheckMenuElem (_("Bypass")));
bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
bypass_menu_item->signal_toggled().connect (mem_fun(*this, &Panner2d::toggle_bypass));
}
bypass_menu_item->set_active (panner.bypassed());
context_menu->popup (1, gtk_get_current_event_time());
}
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;
}
int
Panner2d::puck_position (int which, float& x, float& y)
{
Targets::iterator i;
if ((i = pucks.find (which)) != pucks.end()) {
x = i->second->x;
y = i->second->y;
return 0;
}
return -1;
}
int
Panner2d::target_position (int which, float& x, float& y)
{
Targets::iterator i;
if ((i = targets.find (which)) != targets.end()) {
x = i->second->x;
y = i->second->y;
return 0;
}
return -1;
}