panner2d.h

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/*
    Copyright (C) 2002 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.

*/

#ifndef __ardour_panner_2d_h__
#define __ardour_panner_2d_h__

#include <sys/types.h>
#include <map>
#include <vector>

#include <glibmm/refptr.h>
#include <gtkmm/drawingarea.h>
#include <gtkmm/window.h>
#include <gtkmm/box.h>
#include <gtkmm/button.h>
#include <gtkmm/spinbutton.h>
#include <gtkmm/adjustment.h>

#include "pbd/cartesian.h"

#include "ardour_window.h"

namespace ARDOUR {
        class PannerShell;
}

namespace Gtk {
        class Menu;
        class CheckMenuItem;
}

namespace Pango {
        class Container;
}

class Panner2dWindow;

class Panner2d : public Gtk::DrawingArea
{
        public:
        Panner2d (boost::shared_ptr<ARDOUR::PannerShell>, int32_t height);
        ~Panner2d ();

        void allow_target_motion (bool);

        int  add_speaker (const PBD::AngularVector&);
        int  add_signal (const char* text, const PBD::AngularVector&);
        void move_signal (int which, const PBD::AngularVector&);
        void reset (uint32_t n_inputs);
        void set_send_drawing_mode (bool);

        boost::shared_ptr<ARDOUR::PannerShell> get_panner_shell() const { return panner_shell; }

        void cart_to_gtk (PBD::CartesianVector&) const;
        void gtk_to_cart (PBD::CartesianVector&) const;

        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 *);
        void on_size_allocate (Gtk::Allocation& alloc);

        private:
        class Target {
                public:
                PBD::AngularVector position;
                bool visible;
                std::string text;

                Target (const PBD::AngularVector&, const char* txt = 0);
                ~Target ();

                void set_text (const char*);
                void set_selected (bool yn) {
                        _selected = yn;
                }
                bool selected() const {
                        return _selected;
                }

                private:
                bool _selected;
        };

        boost::shared_ptr<ARDOUR::PannerShell> panner_shell;
        Glib::RefPtr<Pango::Layout> layout;

        typedef std::vector<Target*> Targets;
        Targets speakers;
        Targets signals;
        Target  position;

        Target *drag_target;
        int     width;
        int     height;
        double  radius;
        double  border;
        double  hoffset;
        double  voffset;
        double  last_width;
        bool    did_move;
        bool    have_elevation;
        bool    _send_mode;

        Target *find_closest_object (gdouble x, gdouble y, bool& is_signal);

        gint handle_motion (gint, gint, GdkModifierType);

        void toggle_bypass ();
        void handle_state_change ();
        void handle_position_change ();
        void label_signals ();

        PBD::ScopedConnectionList panshell_connections;
        PBD::ScopedConnectionList panner_connections;

        /* cartesian coordinates in GTK units ; adjust to same but on a circle of radius 1.0
           and centered in the middle of our area
        */
        void clamp_to_circle (double& x, double& y);
        void sphere_project (double& x, double& y, double& z);
};

class Panner2dWindow : public ArdourWindow
{
        public:
        Panner2dWindow (boost::shared_ptr<ARDOUR::PannerShell>, int32_t height, uint32_t inputs);

        void reset (uint32_t n_inputs);

        private:
        Panner2d widget;

        Gtk::HBox         hpacker;
        Gtk::VBox         button_box;
        Gtk::ToggleButton bypass_button;
        Gtk::VBox         spinner_box;
        Gtk::VBox         left_side;

        Gtk::Adjustment   width_adjustment;
        Gtk::SpinButton   width_spinner;

        PBD::ScopedConnectionList panshell_connections;
        PBD::ScopedConnectionList panvalue_connections;
        void set_bypassed();
        void set_width();

        void pannable_handler ();
        void bypass_toggled ();
        void width_changed ();
        bool on_key_press_event (GdkEventKey*);
        bool on_key_release_event (GdkEventKey*);
};

#endif /* __ardour_panner_2d_h__ */