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livetrax/gtk2_ardour/visibility_group.cc

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/*
Copyright (C) 2011 Paul Davis
Author: Carl Hetherington <cth@carlh.net>
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 <gtkmm/menu.h>
#include <gtkmm/menushell.h>
#include <gtkmm/treeview.h>
#include "pbd/strsplit.h"
#include "pbd/xml++.h"
#include "visibility_group.h"
#include "i18n.h"
using namespace std;
VisibilityGroup::VisibilityGroup (std::string const & name)
: _xml_property_name (name)
, _ignore_list_view_change (false)
{
}
/** Add a widget to the group.
* @param widget The widget.
* @param id Some single-word ID to be used for the state of this member in XML.
* @param name User-visible name for the widget.
* @param visible true to default to visible, otherwise false.
* @param override A functor to decide whether the visibility specified by the member should be
* overridden by some external factor; if the returned optional value is given, it will be used
* to override whatever visibility setting the member has.
*/
void
VisibilityGroup::add (Gtk::Widget* widget, string const & id, string const & name, bool visible, boost::function<boost::optional<bool> ()> override)
{
Member m;
m.widget = widget;
m.id = id;
m.name = name;
m.visible = visible;
m.override = override;
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_members.push_back (m);
}
/** Pop up a menu (on right-click) to configure visibility of members */
bool
VisibilityGroup::button_press_event (GdkEventButton* ev)
{
if (ev->button != 3) {
return false;
}
menu()->popup (1, ev->time);
return true;
}
Gtk::Menu*
VisibilityGroup::menu ()
{
using namespace Gtk::Menu_Helpers;
Gtk::Menu* m = Gtk::manage (new Gtk::Menu);
MenuList& items = m->items ();
for (vector<Member>::iterator i = _members.begin(); i != _members.end(); ++i) {
items.push_back (CheckMenuElem (i->name));
Gtk::CheckMenuItem* j = dynamic_cast<Gtk::CheckMenuItem*> (&items.back ());
j->set_active (i->visible);
j->signal_activate().connect (sigc::bind (sigc::mem_fun (*this, &VisibilityGroup::toggle), i));
}
return m;
}
/** @return true if the member should be visible, even taking into account any override functor */
bool
VisibilityGroup::should_actually_be_visible (Member const & m) const
{
if (m.override) {
boost::optional<bool> o = m.override ();
if (o) {
return o.get ();
}
}
return m.visible;
}
/** Update visible consequences of any changes to our _members vector */
void
VisibilityGroup::update ()
{
for (vector<Member>::iterator i = _members.begin(); i != _members.end(); ++i) {
if (i->widget) {
if (should_actually_be_visible (*i)) {
i->widget->show ();
} else {
i->widget->hide ();
}
}
}
update_list_view ();
VisibilityChanged (); /* EMIT SIGNAL */
}
void
VisibilityGroup::toggle (vector<Member>::iterator m)
{
m->visible = !m->visible;
update ();
}
void
VisibilityGroup::set_state (XMLNode const & node)
{
XMLProperty const * p = node.property (_xml_property_name);
if (!p) {
return;
}
set_state (p->value ());
}
void
VisibilityGroup::set_state (string v)
{
for (vector<Member>::iterator i = _members.begin(); i != _members.end(); ++i) {
i->visible = false;
}
do {
string::size_type const comma = v.find_first_of (',');
string segment = v.substr (0, comma);
for (vector<Member>::iterator i = _members.begin(); i != _members.end(); ++i) {
if (segment == i->id) {
i->visible = true;
}
}
if (comma == string::npos) {
break;
}
v = v.substr (comma + 1);
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} while (1);
update ();
}
string
VisibilityGroup::remove_element (std::string const& from, std::string const& element)
{
std::vector<string> s;
std::string ret;
split (from, s, ',');
for (std::vector<string>::const_iterator i = s.begin(); i != s.end(); ++i) {
if ((*i) == element) {
continue;
}
if (!ret.empty()) {
ret += ',';
}
ret += *i;
}
return ret;
}
string
VisibilityGroup::add_element (std::string const& from, std::string const& element)
{
std::vector<string> s;
std::string ret;
split (from, s, ',');
for (std::vector<string>::const_iterator i = s.begin(); i != s.end(); ++i) {
if ((*i) == element) {
/* already present, just return the original */
return from;
}
}
ret = from;
if (!ret.empty()) {
ret += ',';
}
ret += element;
return ret;
}
string
VisibilityGroup::get_state_name () const
{
return _xml_property_name;
}
string
VisibilityGroup::get_state_value () const
{
string result;
for (vector<Member>::const_iterator i = _members.begin(); i != _members.end(); ++i) {
if (i->visible) {
if (!result.empty ()) {
result += ',';
}
result += i->id;
}
}
return result;
}
void
VisibilityGroup::update_list_view ()
{
if (!_model) {
return;
}
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_ignore_list_view_change = true;
_model->clear ();
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for (vector<Member>::iterator i = _members.begin(); i != _members.end(); ++i) {
Gtk::TreeModel::iterator j = _model->append ();
Gtk::TreeModel::Row row = *j;
row[_model_columns._visible] = i->visible;
row[_model_columns._name] = i->name;
row[_model_columns._iterator] = i;
}
_ignore_list_view_change = false;
}
Gtk::Widget *
VisibilityGroup::list_view ()
{
_model = Gtk::ListStore::create (_model_columns);
update_list_view ();
Gtk::TreeView* v = Gtk::manage (new Gtk::TreeView (_model));
v->set_headers_visible (false);
v->append_column ("", _model_columns._visible);
v->append_column ("", _model_columns._name);
Gtk::CellRendererToggle* visible_cell = dynamic_cast<Gtk::CellRendererToggle*> (v->get_column_cell_renderer (0));
visible_cell->property_activatable() = true;
visible_cell->signal_toggled().connect (sigc::mem_fun (*this, &VisibilityGroup::list_view_visible_changed));
return v;
}
void
VisibilityGroup::list_view_visible_changed (string const & path)
{
if (_ignore_list_view_change) {
return;
}
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Gtk::TreeModel::iterator i = _model->get_iter (path);
if (!i) {
return;
}
vector<Member>::iterator j = (*i)[_model_columns._iterator];
j->visible = !j->visible;
(*i)[_model_columns._visible] = j->visible;
update ();
}