mixer_group_tabs.cc

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/*
    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 <boost/foreach.hpp>

#include "gtkmm2ext/utils.h"

#include "ardour/route_group.h"

#include "canvas/colors.h"

#include "ardour_ui.h"
#include "mixer_group_tabs.h"
#include "mixer_strip.h"
#include "mixer_ui.h"
#include "rgb_macros.h"
#include "route_group_dialog.h"
#include "utils.h"

#include "i18n.h"

using namespace std;
using namespace Gtk;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;
using namespace PBD;

MixerGroupTabs::MixerGroupTabs (Mixer_UI* m)
        : _mixer (m)
{

}


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_monitor() || !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;

                        if (g) {
                                tab.color = group_color (g);
                        }
                }

                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 = get_height();
        double r, g, b, a;
        
        if (tab.group && tab.group->is_active()) {
                ArdourCanvas::color_to_rgba (tab.color, r, g, b, a);
        } else {
                ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("inactive group tab"), r, g, b, a);
        }
        
        a = 1.0;

        cairo_set_source_rgba (cr, r, g, b, a);
        cairo_arc (cr, tab.from + arc_radius, get_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, get_height(), arc_radius, 3 * M_PI / 2, 2 * M_PI);
        cairo_line_to (cr, tab.from, get_height());
        cairo_fill (cr);

        if (tab.group) {
                pair<string, double> const f = Gtkmm2ext::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);
                
                ArdourCanvas::Color c = ArdourCanvas::contrasting_text_color (ArdourCanvas::rgba_to_color (r, g, b, a));
                ArdourCanvas::color_to_rgba (c, r, g, b, a);

                cairo_set_source_rgb (cr, r, g, b);
                cairo_move_to (cr, tab.from + (tab.to - tab.from - f.second) / 2, get_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_monitor() || !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;
}

RouteList
MixerGroupTabs::selected_routes () const
{
        RouteList rl;
        BOOST_FOREACH (RouteUI* r, _mixer->selection().routes) {
                boost::shared_ptr<Route> rp = r->route();
                if (rp) {
                        rl.push_back (rp);
                }
        }
        return rl;
}

void
MixerGroupTabs::sync_order_keys ()
{
        _mixer->sync_order_keys_from_treeview ();
}