stereo_panner.h

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/*
 * Copyright (C) 2010-2015 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2011-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2011-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
 *
 * 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.
 */
 
#pragma once
 
#include "pbd/signals.h"
#include "widgets/binding_proxy.h"
#include "panner_interface.h"
 
namespace ARDOUR {
        class PannerShell;
}
 
namespace PBD {
        class Controllable;
}
 
namespace ARDOUR {
        class Panner;
}
 
class StereoPanner : public PannerInterface
{
public:
        StereoPanner (std::shared_ptr<ARDOUR::PannerShell>);
        ~StereoPanner ();
 
        std::shared_ptr<PBD::Controllable> get_position_controllable() const { return position_control; }
        std::shared_ptr<PBD::Controllable> get_width_controllable() const { return width_control; }
 
        sigc::signal<void> StartPositionGesture;
        sigc::signal<void> StopPositionGesture;
        sigc::signal<void> StartWidthGesture;
        sigc::signal<void> StopWidthGesture;
 
protected:
        bool on_expose_event (GdkEventExpose*);
        bool on_button_press_event (GdkEventButton*);
        bool on_button_release_event (GdkEventButton*);
        bool on_motion_notify_event (GdkEventMotion*);
        bool on_scroll_event (GdkEventScroll*);
        bool on_key_press_event (GdkEventKey*);
 
        std::weak_ptr<PBD::Controllable> proxy_controllable () const
        {
                return std::weak_ptr<PBD::Controllable> (position_binder.get_controllable());
        }
 
private:
        PannerEditor* editor ();
        std::shared_ptr<ARDOUR::PannerShell> _panner_shell;
 
        std::shared_ptr<PBD::Controllable> position_control;
        std::shared_ptr<PBD::Controllable> width_control;
        PBD::ScopedConnectionList panvalue_connections;
        PBD::ScopedConnectionList panshell_connections;
        bool dragging_position;
        bool dragging_left;
        bool dragging_right;
        int drag_start_x;
        int last_drag_x;
        double accumulated_delta;
        bool detented;
 
        ArdourWidgets::BindingProxy position_binder;
        ArdourWidgets::BindingProxy width_binder;
 
        void set_tooltip ();
 
        struct ColorScheme {
                uint32_t outline;
                uint32_t fill;
                uint32_t text;
                uint32_t background;
                uint32_t rule;
        };
 
        enum State {
                Normal,
                Mono,
                Inverted
        };
 
        bool _dragging;
 
        static Pango::AttrList panner_font_attributes;
        static bool have_font;
 
        static ColorScheme colors[3];
        static uint32_t colors_send_bg;
        static uint32_t colors_send_pan;
        static void set_colors ();
        static bool have_colors;
        void color_handler ();
        void bypass_handler ();
        void pannable_handler ();
};