livetrax/gtk2_ardour/mixer_group_tabs.cc

/*
    Copyright (C) 2009 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 "ardour/route_group.h"
#include "ardour/session.h"
#include "mixer_group_tabs.h"
#include "mixer_strip.h"
#include "mixer_ui.h"
#include "utils.h"
#include "i18n.h"
#include "route_group_dialog.h"

using namespace std;
using namespace Gtk;
using namespace ARDOUR;

MixerGroupTabs::MixerGroupTabs (Mixer_UI* m)
	: GroupTabs (0),
	  _mixer (m),
	  _menu (0)
{

}


list<GroupTabs::Tab>
MixerGroupTabs::compute_tabs () const
{
	list<Tab> tabs;

	Tab tab;
	tab.from = 0;
	tab.group = 0;

	int32_t x = 0;
	TreeModel::Children rows = _mixer->track_model->children ();
	for (TreeModel::Children::iterator i = rows.begin(); i != rows.end(); ++i) {

		MixerStrip* s = (*i)[_mixer->track_columns.strip];

		if (s->route()->is_master() || s->route()->is_control() || !s->marked_for_display()) {
			continue;
		}

		RouteGroup* g = s->route_group ();

		if (g != tab.group) {
			if (tab.group) {
				tab.to = x;
				tabs.push_back (tab);
			}

			tab.from = x;
			tab.group = g;
			tab.colour = s->color ();
		}

		x += s->get_width ();
	}

	if (tab.group) {
		tab.to = x;
		tabs.push_back (tab);
	}

	return tabs;
}

void
MixerGroupTabs::draw_tab (cairo_t* cr, Tab const & tab) const
{
	double const arc_radius = _height;

	if (tab.group && tab.group->is_active()) {
		cairo_set_source_rgba (cr, tab.colour.get_red_p (), tab.colour.get_green_p (), tab.colour.get_blue_p (), 1);
	} else {
		cairo_set_source_rgba (cr, 1, 1, 1, 0.2);
	}

	cairo_arc (cr, tab.from + arc_radius, _height, arc_radius, M_PI, 3 * M_PI / 2);
	cairo_line_to (cr, tab.to - arc_radius, 0);
	cairo_arc (cr, tab.to - arc_radius, _height, arc_radius, 3 * M_PI / 2, 2 * M_PI);
	cairo_line_to (cr, tab.from, _height);
	cairo_fill (cr);

	if (tab.group) {
		pair<string, double> const f = fit_to_pixels (cr, tab.group->name(), tab.to - tab.from - arc_radius * 2);
		
		cairo_text_extents_t ext;
		cairo_text_extents (cr, tab.group->name().c_str(), &ext);
		
		cairo_set_source_rgb (cr, 1, 1, 1);
		cairo_move_to (cr, tab.from + (tab.to - tab.from - f.second) / 2, _height - ext.height / 2);
		cairo_save (cr);
		cairo_show_text (cr, f.first.c_str());
		cairo_restore (cr);
	}
}

double
MixerGroupTabs::primary_coordinate (double x, double) const
{
	return x;
}

RouteList
MixerGroupTabs::routes_for_tab (Tab const * t) const
{
	RouteList routes;
	int32_t x = 0;

	TreeModel::Children rows = _mixer->track_model->children ();
	for (TreeModel::Children::iterator i = rows.begin(); i != rows.end(); ++i) {

		MixerStrip* s = (*i)[_mixer->track_columns.strip];

	 	if (s->route()->is_master() || s->route()->is_control() || !s->marked_for_display()) {
	 		continue;
	 	}

		if (x >= t->to) {
			/* tab finishes before this track starts */
			break;
		}

		double const h = x + s->get_width() / 2;

		if (t->from < h && t->to > h) {
			routes.push_back (s->route ());
		}

		x += s->get_width ();
	}

	return routes;
}

Gtk::Menu*
MixerGroupTabs::get_menu (RouteGroup* g)
{
	if (g == 0) {
		return 0;
	}

	using namespace Menu_Helpers;

	delete _menu;
	_menu = new Menu;

	MenuList& items = _menu->items ();
	items.push_back (MenuElem (_("Edit..."), sigc::bind (sigc::mem_fun (*this, &MixerGroupTabs::edit_group), g)));
	items.push_back (MenuElem (_("Subgroup"), sigc::bind (sigc::mem_fun (*this, &MixerGroupTabs::make_subgroup), g)));
	items.push_back (SeparatorElem());
	items.push_back (MenuElem (_("Remove"), sigc::bind (sigc::mem_fun (*this, &MixerGroupTabs::remove_group), g)));

	return _menu;
}

void
MixerGroupTabs::edit_group (RouteGroup* g)
{
	RouteGroupDialog d (g, Gtk::Stock::APPLY);
	d.do_run ();
}

void
MixerGroupTabs::remove_group (RouteGroup *g)
{
	_session->remove_route_group (*g);
}

void
MixerGroupTabs::make_subgroup (RouteGroup* g)
{
	g->make_subgroup ();
}

void
MixerGroupTabs::destroy_subgroup (RouteGroup* g)
{
	g->destroy_subgroup ();
}

ARDOUR::RouteGroup *
MixerGroupTabs::new_route_group () const
{
	RouteGroup* g = new RouteGroup (
		*_session,
		"",
		RouteGroup::Active,
		(RouteGroup::Property) (RouteGroup::Gain | RouteGroup::Mute | RouteGroup::Solo | RouteGroup::RecEnable)
		);

	RouteGroupDialog d (g, Gtk::Stock::NEW);
	int const r = d.do_run ();

	if (r != Gtk::RESPONSE_OK) {
		delete g;
		return 0;
	}
	
	_session->add_route_group (g);
	return g;
}