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ardour/gtk2_ardour/group_tabs.cc

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/*
* Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2009-2012 David Robillard <d@drobilla.net>
* Copyright (C) 2009-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <gtkmm/stock.h>
#include "ardour/session.h"
#include "ardour/route_group.h"
#include "ardour/route.h"
#include "ardour/vca_manager.h"
#include "ardour/vca.h"
#include "gtkmm2ext/doi.h"
#include "gui_thread.h"
#include "route_group_dialog.h"
#include "group_tabs.h"
#include "keyboard.h"
#include "pbd/i18n.h"
#include "ardour_ui.h"
#include "rgb_macros.h"
#include "ui_config.h"
#include "utils.h"
using namespace std;
using namespace Gtk;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;
using Gtkmm2ext::Keyboard;
list<Gdk::Color> GroupTabs::_used_colors;
GroupTabs::GroupTabs ()
: _menu (0)
, _dragging (0)
, _dragging_new_tab (0)
{
add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &GroupTabs::queue_draw));
}
GroupTabs::~GroupTabs ()
{
delete _menu;
}
void
GroupTabs::set_session (Session* s)
{
SessionHandlePtr::set_session (s);
if (_session) {
_session->RouteGroupPropertyChanged.connect (
_session_connections, invalidator (*this), boost::bind (&GroupTabs::route_group_property_changed, this, _1), gui_context()
);
_session->RouteAddedToRouteGroup.connect (
_session_connections, invalidator (*this), boost::bind (&GroupTabs::route_added_to_route_group, this, _1, _2), gui_context()
);
_session->RouteRemovedFromRouteGroup.connect (
_session_connections, invalidator (*this), boost::bind (&GroupTabs::route_removed_from_route_group, this, _1, _2), gui_context()
);
_session->route_group_removed.connect (_session_connections, invalidator (*this), boost::bind (&GroupTabs::set_dirty, this, (cairo_rectangle_t*)0), gui_context());
}
}
/** Handle a size request.
* @param req GTK requisition
*/
void
GroupTabs::on_size_request (Gtk::Requisition *req)
{
req->width = std::max (16.f, rintf (16.f * UIConfiguration::instance().get_ui_scale()));
req->height = std::max (16.f, rintf (16.f * UIConfiguration::instance().get_ui_scale()));
}
bool
GroupTabs::on_button_press_event (GdkEventButton* ev)
{
using namespace Menu_Helpers;
if (!get_sensitive ()) {
return true;
}
double const p = primary_coordinate (ev->x, ev->y);
list<Tab>::iterator prev;
list<Tab>::iterator next;
Tab* t = click_to_tab (p, &prev, &next);
_drag_min = prev != _tabs.end() ? prev->to : 0;
_drag_max = next != _tabs.end() ? next->from : extent ();
if (ev->button == 1) {
if (t == 0) {
Tab n;
n.from = n.to = p;
_dragging_new_tab = true;
if (next == _tabs.end()) {
_tabs.push_back (n);
t = &_tabs.back ();
} else {
list<Tab>::iterator j = _tabs.insert (next, n);
t = &(*j);
}
} else {
_dragging_new_tab = false;
_initial_dragging_routes = routes_for_tab (t);
}
_dragging = t;
_drag_moved = false;
_drag_first = p;
double const h = (t->from + t->to) / 2;
if (p < h) {
_drag_moving = t->from;
_drag_fixed = t->to;
_drag_offset = p - t->from;
} else {
_drag_moving = t->to;
_drag_fixed = t->from;
_drag_offset = p - t->to;
}
} else if (ev->button == 3) {
RouteGroup* g = t ? t->group : 0;
if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier) && g) {
remove_group (g);
} else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier) && g) {
edit_group (g);
} else {
Menu* m = get_menu (g, true);
if (m) {
m->popup (ev->button, ev->time);
}
}
}
return true;
}
bool
GroupTabs::on_motion_notify_event (GdkEventMotion* ev)
{
if (_dragging == 0) {
return false;
}
double const p = primary_coordinate (ev->x, ev->y);
if (p != _drag_first) {
_drag_moved = true;
}
_drag_moving = p - _drag_offset;
_dragging->from = min (_drag_moving, _drag_fixed);
_dragging->to = max (_drag_moving, _drag_fixed);
_dragging->from = max (_dragging->from, _drag_min);
_dragging->to = min (_dragging->to, _drag_max);
set_dirty ();
queue_draw ();
gdk_event_request_motions(ev);
return true;
}
bool
GroupTabs::on_button_release_event (GdkEventButton*)
{
if (_dragging == 0) {
return false;
}
if (!_drag_moved) {
if (_dragging->group) {
/* toggle active state */
_dragging->group->set_active (!_dragging->group->is_active (), this);
}
} else {
/* finish drag */
RouteList routes = routes_for_tab (_dragging);
if (!routes.empty()) {
if (_dragging_new_tab) {
run_new_group_dialog (&routes, false);
} else {
std::shared_ptr<RouteList const> r = _session->get_routes ();
/* First add new ones, then remove old ones.
* We cannot allow the group to become temporarily empty, because
* Session::route_removed_from_route_group() will delete empty groups.
*/
for (RouteList::const_iterator i = routes.begin(); i != routes.end(); ++i) {
/* RouteGroup::add () ignores routes already present in the set */
_dragging->group->add (*i);
}
for (auto const& i : *r) {
bool const was_in_tab = find (
_initial_dragging_routes.begin(), _initial_dragging_routes.end(), i) != _initial_dragging_routes.end ();
bool const now_in_tab = find (routes.begin(), routes.end(), i) != routes.end();
if (was_in_tab && !now_in_tab) {
_dragging->group->remove (i);
}
}
}
}
set_dirty ();
queue_draw ();
}
_dragging = 0;
_initial_dragging_routes.clear ();
return true;
}
void
GroupTabs::render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t*)
{
cairo_t* cr = ctx->cobj();
Gdk::Color c;
if (!get_sensitive ()) {
c = get_style()->get_base (Gtk::STATE_INSENSITIVE);
} else {
c = get_style()->get_base (Gtk::STATE_NORMAL);
}
/* background */
cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
cairo_rectangle (cr, 0, 0, get_width(), get_height());
cairo_fill (cr);
if (!get_sensitive ()) {
return;
}
if (_dragging == 0) {
_tabs = compute_tabs ();
}
/* tabs */
for (list<Tab>::const_iterator i = _tabs.begin(); i != _tabs.end(); ++i) {
draw_tab (cr, *i);
}
}
/** Convert a click position to a tab.
* @param c Click position.
* @param prev Filled in with the previous tab to the click, or _tabs.end().
* @param next Filled in with the next tab after the click, or _tabs.end().
* @return Tab under the click, or 0.
*/
GroupTabs::Tab *
GroupTabs::click_to_tab (double c, list<Tab>::iterator* prev, list<Tab>::iterator* next)
{
*prev = *next = _tabs.end ();
Tab* under = 0;
list<Tab>::iterator i = _tabs.begin ();
while (i != _tabs.end()) {
if (i->from > c) {
*next = i;
break;
}
if (i->to < c) {
*prev = i;
++i;
continue;
}
if (i->from <= c && c < i->to) {
under = &(*i);
}
++i;
}
return under;
}
void
GroupTabs::add_new_from_items (Menu_Helpers::MenuList& items)
{
using namespace Menu_Helpers;
Menu *new_from;
new_from = manage (new Menu);
{
MenuList& f = new_from->items ();
f.push_back (MenuElem (_("Selection..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_from_selection), false)));
f.push_back (MenuElem (_("Record Enabled..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_from_rec_enabled), false)));
f.push_back (MenuElem (_("Soloed..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_from_soloed), false)));
}
items.push_back (MenuElem (_("Create New Group From..."), *new_from));
new_from = manage (new Menu);
{
MenuList& f = new_from->items ();
f.push_back (MenuElem (_("Selection..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_from_selection), true)));
f.push_back (MenuElem (_("Record Enabled..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_from_rec_enabled), true)));
f.push_back (MenuElem (_("Soloed..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_from_soloed), true)));
}
items.push_back (MenuElem (_("Create New Group with Master From..."), *new_from));
}
Gtk::Menu*
GroupTabs::get_menu (RouteGroup* g, bool in_tab_area)
{
using namespace Menu_Helpers;
delete _menu;
_menu = new Menu;
_menu->set_name ("ArdourContextMenu");
MenuList& items = _menu->items();
Menu* vca_menu;
const VCAList vcas = _session->vca_manager().vcas ();
if (!in_tab_area) {
/* context menu is not for a group tab, show the "create new
from" items here
*/
add_new_from_items (items);
}
if (g) {
items.push_back (SeparatorElem());
items.push_back (MenuElem (_("Edit Group..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::edit_group), g)));
items.push_back (MenuElem (_("Collect Group"), sigc::bind (sigc::mem_fun (*this, &GroupTabs::collect), g)));
items.push_back (MenuElem (_("Remove Group"), sigc::bind (sigc::mem_fun (*this, &GroupTabs::remove_group), g)));
items.push_back (SeparatorElem());
if (g->has_control_master()) {
items.push_back (MenuElem (_("Drop Group from VCA..."), sigc::bind (sigc::mem_fun (*this, &GroupTabs::unassign_group_to_master), g->group_master_number(), g)));
} else {
vca_menu = manage (new Menu);
MenuList& f (vca_menu->items());
f.push_back (MenuElem ("New", sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_group_to_master), 0, g, true)));
for (VCAList::const_iterator v = vcas.begin(); v != vcas.end(); ++v) {
f.push_back (MenuElem ((*v)->name().empty() ? string_compose ("VCA %1", (*v)->number()) : (*v)->name(), sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_group_to_master), (*v)->number(), g, true)));
}
items.push_back (MenuElem (_("Assign Group to VCA..."), *vca_menu));
}
items.push_back (SeparatorElem());
if (g->has_subgroup ()) {
items.push_back (MenuElem (_("Remove Subgroup Bus"), sigc::bind (sigc::mem_fun (*this, &GroupTabs::un_subgroup), g)));
} else {
items.push_back (MenuElem (_("Add New Subgroup Bus"), sigc::bind (sigc::mem_fun (*this, &GroupTabs::subgroup), g, false, PreFader)));
items.back().set_sensitive (g->can_subgroup (false, PostFader));
items.push_back (MenuElem (_("Add New Aux Bus (pre-fader)"), sigc::bind (sigc::mem_fun (*this, &GroupTabs::subgroup), g, true, PreFader)));
items.back().set_sensitive (g->can_subgroup (true, PreFader));
items.push_back (MenuElem (_("Add New Aux Bus (post-fader)"), sigc::bind (sigc::mem_fun (*this, &GroupTabs::subgroup), g, true, PostFader)));
items.back().set_sensitive (g->can_subgroup (true, PostFader));
}
items.push_back (SeparatorElem());
}
add_menu_items (_menu, g);
if (in_tab_area) {
/* context menu is for a group tab, show the "create new
from" items here
*/
add_new_from_items (items);
}
items.push_back (SeparatorElem());
vca_menu = manage (new Menu);
{
MenuList& f (vca_menu->items());
f.push_back (MenuElem ("New", sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_selection_to_master), 0)));
for (VCAList::const_iterator v = vcas.begin(); v != vcas.end(); ++v) {
f.push_back (MenuElem ((*v)->name().empty() ? string_compose ("VCA %1", (*v)->number()) : (*v)->name(), sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_selection_to_master), (*v)->number())));
}
}
items.push_back (MenuElem (_("Assign Selection to VCA..."), *vca_menu));
vca_menu = manage (new Menu);
{
MenuList& f (vca_menu->items());
f.push_back (MenuElem ("New", sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_recenabled_to_master), 0)));
for (VCAList::const_iterator v = vcas.begin(); v != vcas.end(); ++v) {
f.push_back (MenuElem ((*v)->name().empty() ? string_compose ("VCA %1", (*v)->number()) : (*v)->name(), sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_recenabled_to_master), (*v)->number())));
}
}
items.push_back (MenuElem (_("Assign Record Enabled to VCA..."), *vca_menu));
vca_menu = manage (new Menu);
{
MenuList& f (vca_menu->items());
f.push_back (MenuElem ("New", sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_soloed_to_master), 0)));
for (VCAList::const_iterator v = vcas.begin(); v != vcas.end(); ++v) {
f.push_back (MenuElem ((*v)->name().empty() ? string_compose ("VCA %1", (*v)->number()) : (*v)->name(), sigc::bind (sigc::mem_fun (*this, &GroupTabs::assign_soloed_to_master), (*v)->number())));
}
}
items.push_back (MenuElem (_("Assign Soloed to VCA..."), *vca_menu));
items.push_back (SeparatorElem());
items.push_back (MenuElem (_("Enable All Groups"), sigc::mem_fun(*this, &GroupTabs::activate_all)));
items.push_back (MenuElem (_("Disable All Groups"), sigc::mem_fun(*this, &GroupTabs::disable_all)));
return _menu;
}
void
GroupTabs::assign_group_to_master (uint32_t which, RouteGroup* group, bool rename_master) const
{
if (!_session || !group) {
return;
}
std::shared_ptr<VCA> master;
if (which == 0) {
if (_session->vca_manager().create_vca (1).empty ()) {
/* error */
return;
}
/* Get most recently created VCA... */
which = _session->vca_manager().vcas().back()->number();
}
master = _session->vca_manager().vca_by_number (which);
if (!master) {
/* should never happen; if it does, basically something deeply
odd happened, no reason to tell user because there's no
sensible explanation.
*/
return;
}
group->assign_master (master);
if (rename_master){
master->set_name (group->name());
}
}
void
GroupTabs::unassign_group_to_master (uint32_t which, RouteGroup* group) const
{
if (!_session || !group) {
return;
}
std::shared_ptr<VCA> master = _session->vca_manager().vca_by_number (which);
if (!master) {
/* should never happen; if it does, basically something deeply
odd happened, no reason to tell user because there's no
sensible explanation.
*/
return;
}
group->unassign_master (master);
}
void
GroupTabs::assign_some_to_master (uint32_t which, RouteList rl, std::string vcaname)
{
if (!_session) {
return;
}
std::shared_ptr<VCA> master;
bool set_name = false;
if (which == 0) {
if (_session->vca_manager().create_vca (1).empty ()) {
/* error */
return;
}
set_name = true;
/* Get most recently created VCA... */
which = _session->vca_manager().vcas().back()->number();
}
master = _session->vca_manager().vca_by_number (which);
if (!master) {
/* should never happen; if it does, basically something deeply
odd happened, no reason to tell user because there's no
sensible explanation.
*/
return;
}
if (rl.empty()) {
return;
}
for (RouteList::iterator r = rl.begin(); r != rl.end(); ++r) {
(*r)->assign (master);
}
if (set_name && !vcaname.empty()) {
master->set_name (vcaname);
}
}
RouteList
GroupTabs::get_rec_enabled ()
{
RouteList rec_enabled;
if (!_session) {
return rec_enabled;
}
std::shared_ptr<RouteList const> rl = _session->get_routes ();
for (auto const& i : *rl) {
std::shared_ptr<Track> trk (std::dynamic_pointer_cast<Track> (i));
if (trk && trk->rec_enable_control()->get_value()) {
rec_enabled.push_back (i);
}
}
return rec_enabled;
}
RouteList
GroupTabs::get_soloed ()
{
RouteList rl = _session->get_routelist ();
RouteList soloed;
for (RouteList::iterator i = rl.begin(); i != rl.end(); ++i) {
if (!(*i)->is_master() && (*i)->soloed()) {
soloed.push_back (*i);
}
}
return soloed;
}
void
GroupTabs::assign_selection_to_master (uint32_t which)
{
assign_some_to_master (which, selected_routes (), _("Selection"));
}
void
GroupTabs::assign_recenabled_to_master (uint32_t which)
{
assign_some_to_master (which, get_rec_enabled());
}
void
GroupTabs::assign_soloed_to_master (uint32_t which)
{
assign_some_to_master (which, get_soloed());
}
void
GroupTabs::new_from_selection (bool with_master)
{
RouteList rl (selected_routes());
run_new_group_dialog (&rl, with_master);
}
void
GroupTabs::new_from_rec_enabled (bool with_master)
{
RouteList rl (get_rec_enabled());
run_new_group_dialog (&rl, with_master);
}
void
GroupTabs::new_from_soloed (bool with_master)
{
RouteList rl (get_soloed());
run_new_group_dialog (&rl, with_master);
}
void
GroupTabs::run_new_group_dialog (RouteList const * rl, bool with_master)
{
if (rl && rl->empty()) {
return;
}
RouteGroup* g = new RouteGroup (*_session, "");
RouteGroupDialog* d = new RouteGroupDialog (g, true);
d->signal_response().connect (sigc::bind (sigc::mem_fun (*this, &GroupTabs::new_group_dialog_finished), d, rl ? new RouteList (*rl): 0, with_master));
d->present ();
}
void
GroupTabs::new_group_dialog_finished (int r, RouteGroupDialog* d, RouteList const * rl, bool with_master) const
{
if (r == RESPONSE_OK) {
if (!d->name_check()) {
return;
}
_session->add_route_group (d->group());
if (rl) {
for (RouteList::const_iterator i = rl->begin(); i != rl->end(); ++i) {
d->group()->add (*i);
}
if (with_master) {
assign_group_to_master (0, d->group(), true); /* zero => new master */
}
}
} else {
delete d->group ();
}
delete rl;
delete_when_idle (d);
}
void
GroupTabs::edit_group (RouteGroup* g)
{
RouteGroupDialog* d = new RouteGroupDialog (g, false);
d->signal_response().connect (sigc::bind (sigc::mem_fun (*this, &GroupTabs::edit_group_dialog_finished), d));
d->present ();
}
void
GroupTabs::edit_group_dialog_finished (int r, RouteGroupDialog* d) const
{
delete_when_idle (d);
}
void
GroupTabs::subgroup (RouteGroup* g, bool aux, Placement placement)
{
g->make_subgroup (aux, placement);
}
void
GroupTabs::un_subgroup (RouteGroup* g)
{
g->destroy_subgroup ();
}
/** Collect all members of a RouteGroup so that they are together in the Editor or Mixer.
* @param g Group to collect.
*/
void
GroupTabs::collect (RouteGroup* g)
{
std::shared_ptr<RouteList> group_routes = g->route_list ();
group_routes->sort (Stripable::Sorter());
int const N = group_routes->size ();
RouteList::iterator i = group_routes->begin ();
RouteList routes = _session->get_routelist ();
routes.sort (Stripable::Sorter());
RouteList::const_iterator j = routes.begin ();
int diff = 0;
int coll = -1;
PresentationInfo::ChangeSuspender cs;
while (i != group_routes->end() && j != routes.end()) {
PresentationInfo::order_t const k = (*j)->presentation_info ().order();
if (*i == *j) {
if (coll == -1) {
coll = k;
diff = N - 1;
} else {
--diff;
}
(*j)->set_presentation_order (coll);
++coll;
++i;
} else {
(*j)->set_presentation_order (k + diff);
}
++j;
}
}
void
GroupTabs::activate_all ()
{
_session->foreach_route_group (
sigc::bind (sigc::mem_fun (*this, &GroupTabs::set_activation), true)
);
}
void
GroupTabs::disable_all ()
{
_session->foreach_route_group (
sigc::bind (sigc::mem_fun (*this, &GroupTabs::set_activation), false)
);
}
void
GroupTabs::set_activation (RouteGroup* g, bool a)
{
g->set_active (a, this);
}
void
GroupTabs::remove_group (RouteGroup* g)
{
std::shared_ptr<RouteList> rl (g->route_list ());
_session->remove_route_group (*g);
emit_gui_changed_for_members (rl);
}
/** Set the color of the tab of a route group */
void
GroupTabs::set_group_color (RouteGroup* group, uint32_t color)
{
assert (group);
PresentationInfo::ChangeSuspender cs;
group->set_rgba (color);
}
/** @return the ID string to use for the GUI state of a route group */
string
GroupTabs::group_gui_id (RouteGroup* group)
{
assert (group);
char buf[64];
snprintf (buf, sizeof (buf), "route_group %s", group->id().to_s().c_str ());
return buf;
}
/** @return the color to use for a route group tab */
uint32_t
GroupTabs::group_color (RouteGroup* group)
{
assert (group);
/* prefer libardour color, if set */
uint32_t rgba = group->rgba ();
if (rgba != 0) {
return rgba;
}
/* backwards compatibility, load old color */
GUIObjectState& gui_state = *ARDOUR_UI::instance()->gui_object_state;
string const gui_id = group_gui_id (group);
bool empty;
string const color = gui_state.get_string (gui_id, "color", &empty);
if (empty) {
/* no color has yet been set, so use a random one */
uint32_t c = Gtkmm2ext::gdk_color_to_rgba (unique_random_color (_used_colors));
set_group_color (group, c);
return c;
}
int r, g, b;
/* for historical reasons, colors are stored as 16 bit values. */
sscanf (color.c_str(), "%d:%d:%d", &r, &g, &b);
r /= 256;
g /= 256;
b /= 256;
group->migrate_rgba (RGBA_TO_UINT (r, g, b, 255));
gui_state.remove_node (gui_id);
return RGBA_TO_UINT (r, g, b, 255);
}
void
GroupTabs::route_group_property_changed (RouteGroup* rg)
{
/* This is a bit of a hack, but this might change
our route's effective color, so emit gui_changed
for our routes.
*/
emit_gui_changed_for_members (rg->route_list ());
set_dirty ();
}
void
GroupTabs::route_added_to_route_group (RouteGroup*, std::weak_ptr<Route> w)
{
/* Similarly-spirited hack as in route_group_property_changed */
std::shared_ptr<Route> r = w.lock ();
if (!r) {
return;
}
r->presentation_info().PropertyChanged (Properties::color);
set_dirty ();
}
void
GroupTabs::route_removed_from_route_group (RouteGroup*, std::weak_ptr<Route> w)
{
/* Similarly-spirited hack as in route_group_property_changed */
std::shared_ptr<Route> r = w.lock ();
if (!r) {
return;
}
r->presentation_info().PropertyChanged (Properties::color);
set_dirty ();
}
void
GroupTabs::emit_gui_changed_for_members (std::shared_ptr<RouteList> rl)
{
PresentationInfo::ChangeSuspender cs;
for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
(*i)->presentation_info().PropertyChanged (Properties::color);
}
}
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