ardour_display.cc

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/*
    Copyright (C) 2014 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 <iostream>
#include <cmath>
#include <algorithm>

#include <pangomm/layout.h>

#include "pbd/compose.h"
#include "pbd/error.h"
#include "pbd/stacktrace.h"

#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/rgb_macros.h"
#include "gtkmm2ext/gui_thread.h"
#include "gtkmm2ext/keyboard.h"

#include "ardour/rc_configuration.h" // for widget prelight preference

#include "ardour_display.h"
#include "ardour_ui.h"
#include "global_signals.h"

#include "i18n.h"

using namespace Gtkmm2ext;
using namespace Gdk;
using namespace Gtk;
using namespace Glib;
using namespace PBD;
using std::max;
using std::min;
using namespace std;


ArdourDisplay::ArdourDisplay (Element e)
{
        add_elements(e);
        add_elements(ArdourButton::Menu);
        add_elements(ArdourButton::Text);
}

ArdourDisplay::~ArdourDisplay ()
{
}

bool
ArdourDisplay::on_button_press_event (GdkEventButton*)
{
        _menu.popup (1, gtk_get_current_event_time());  
        return true;
}

bool
ArdourDisplay::on_scroll_event (GdkEventScroll* ev)
{
        /* mouse wheel */

        float scale = 1.0;
        if (ev->state & Keyboard::GainFineScaleModifier) {
                if (ev->state & Keyboard::GainExtraFineScaleModifier) {
                        scale *= 0.01;
                } else {
                        scale *= 0.10;
                }
        }

        boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
        if (c) {
                float val = c->get_interface();
        
                if ( ev->direction == GDK_SCROLL_UP )
                        val += 0.05 * scale;  //by default, we step in 1/20ths of the knob travel
                else
                        val -= 0.05 * scale;
                        
                c->set_interface(val);
        }

        return true;
}


void
ArdourDisplay::add_controllable_preset (const char *txt, float val)
{
        using namespace Menu_Helpers;

        MenuList& items = _menu.items ();

        items.push_back (MenuElem (txt, sigc::bind (sigc::mem_fun(*this, &ArdourDisplay::handle_controllable_preset), val)));
}


void
ArdourDisplay::handle_controllable_preset (float p)
{
        boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();

        if (!c) return;

        c->set_user(p);
}


void
ArdourDisplay::set_controllable (boost::shared_ptr<Controllable> c)
{
    watch_connection.disconnect ();  //stop watching the old controllable

        if (!c) return;

        binding_proxy.set_controllable (c);

        c->Changed.connect (watch_connection, invalidator(*this), boost::bind (&ArdourDisplay::controllable_changed, this), gui_context());

        controllable_changed();
}

void
ArdourDisplay::controllable_changed ()
{
        boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();

        if (!c) return;

        set_text(c->get_user_string());

        set_dirty();
}