port_matrix_component.h

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/*
 * Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
 *
 * 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.
 */
 
#ifndef __gtk_ardour_port_matrix_component_h__
#define __gtk_ardour_port_matrix_component_h__
 
#include <cstdint>
#include <memory>
 
#include <gtkmm/eventbox.h>
 
class PortMatrix;
class PortMatrixBody;
class PortMatrixNode;
class PortGroup;
class PortGroupList;
 
namespace ARDOUR {
        class Bundle;
        class BundleChannel;
}
 
class PortMatrixComponent
{
public:
        PortMatrixComponent (PortMatrix *, PortMatrixBody *);
        virtual ~PortMatrixComponent ();
 
        virtual double component_to_parent_x (double x) const = 0;
        virtual double parent_to_component_x (double x) const = 0;
        virtual double component_to_parent_y (double y) const = 0;
        virtual double parent_to_component_y (double y) const = 0;
        virtual void mouseover_changed (std::list<PortMatrixNode> const &) = 0;
        virtual void draw_extra (cairo_t *) = 0;
        virtual void button_press (double, double, GdkEventButton *) {}
        virtual void button_release (double, double, GdkEventButton *) {}
        virtual void motion (double, double) {}
 
        void set_show_ports (bool);
        void setup ();
        GdkPixmap* get_pixmap (GdkDrawable *);
        std::pair<uint32_t, uint32_t> dimensions ();
 
        void require_render () {
                _render_required = true;
        }
 
        void require_rebuild () {
                _dimension_computation_required = true;
                _render_required = true;
        }
 
        void set_parent_rectangle (Gdk::Rectangle const & r) {
                _parent_rectangle = r;
        }
 
        Gdk::Rectangle parent_rectangle () const {
                return _parent_rectangle;
        }
 
        static uint32_t grid_spacing ();
 
protected:
 
        static uint32_t label_border_width () {
                return 1;
        }
 
        static uint32_t name_pad () {
                return 8;
        }
 
        static double thin_grid_line_width () {
                return 0.5;
        }
 
        static double thick_grid_line_width () {
                return 1;
        }
 
        static uint32_t connection_indicator_pad () {
                return 6;
        }
 
        static uint32_t mouseover_line_width () {
                return 4;
        }
 
        static double angle () {
                return M_PI / 4;
        }
 
        Gdk::Color background_colour ();
 
        /* XXX I guess these colours should come from a theme, or something */
 
        static Gdk::Color text_colour () {
                return Gdk::Color ("#ffffff");
        }
 
        static Gdk::Color grid_colour () {
                return Gdk::Color ("#000000");
        }
 
        static Gdk::Color association_colour () {
                return Gdk::Color ("#00ff00");
        }
 
        static Gdk::Color non_connectable_colour () {
                return Gdk::Color ("#cccccc");
        }
 
        static Gdk::Color mouseover_line_colour () {
                return Gdk::Color ("#ff0000");
        }
 
        static Gdk::Color highlighted_channel_colour () {
                return Gdk::Color ("#777777");
        }
 
        /* XXX */
        static Gdk::Color get_a_bundle_colour (int x) {
                if ((x % 2) == 0) {
                        return Gdk::Color ("#555555");
                } else {
                        return Gdk::Color ("#666666");
                }
        }
 
        /* XXX */
        static Gdk::Color get_a_group_colour (int x) {
                if ((x % 2) == 0) {
                        return Gdk::Color ("#222222");
                } else {
                        return Gdk::Color ("#444444");
                }
        }
 
        void set_source_rgb (cairo_t *, Gdk::Color const &);
        void set_source_rgba (cairo_t *, Gdk::Color const &, double);
        uint32_t group_size (std::shared_ptr<const PortGroup>) const;
        uint32_t channel_to_position (ARDOUR::BundleChannel, std::shared_ptr<const PortGroup>) const;
        virtual ARDOUR::BundleChannel position_to_channel (double, double, std::shared_ptr<const PortGroup>) const;
 
        virtual void render (cairo_t *) = 0;
        virtual void compute_dimensions () = 0;
 
        PortMatrix* _matrix;
        PortMatrixBody* _body; 
        uint32_t _width; 
        uint32_t _height; 
        Gdk::Rectangle _parent_rectangle;
 
private:
        GdkPixmap* _pixmap; 
        bool _render_required; 
        bool _dimension_computation_required; 
};
 
#endif