ardour_button.h

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/*
 * Copyright (C) 2010 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2017-2018 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.
 */
 
#ifndef _WIDGETS_ARDOUR_BUTTON_H_
#define _WIDGETS_ARDOUR_BUTTON_H_
 
#include <list>
#include <stdint.h>
 
#include <gtkmm/action.h>
 
#include "pbd/signals.h"
#include "gtkmm2ext/activatable.h"
#include "gtkmm2ext/cairo_widget.h"
 
#include "widgets/ardour_icon.h"
#include "widgets/binding_proxy.h"
#include "widgets/visibility.h"
 
namespace ArdourWidgets {
 
class LIBWIDGETS_API ArdourButton : public CairoWidget , public Gtkmm2ext::Activatable
{
        public:
        enum Element {
                Edge = 0x1,
                Body = 0x2,
                Text = 0x4,
                Indicator = 0x8,
                ColorBox = 0x18,  //also sets Indicator
                Menu = 0x20,
                Inactive = 0x40, // no _action is defined AND state is not used
                VectorIcon = 0x80,
                IconRenderCallback = 0x100,
        };
 
        typedef void (* rendercallback_t) (cairo_t*, int, int, uint32_t, void*);
 
        static Element default_elements;
        static Element led_default_elements;
        static Element just_led_default_elements;
 
        ArdourButton (Element e = default_elements, bool toggle = false);
        ArdourButton (const std::string&, Element e = default_elements, bool toggle = false);
        virtual ~ArdourButton ();
 
        enum Tweaks {
                Square = 0x1,
                TrackHeader = 0x2,
                OccasionalText = 0x4,
                OccasionalLED = 0x8,
                ForceBoxy = 0x10,
                ForceFlat = 0x20,
        };
 
        static Tweaks default_tweaks;
        static void set_default_tweaks (Tweaks t) { default_tweaks = t; }
 
        Tweaks tweaks() const { return _tweaks; }
        void set_tweaks (Tweaks);
 
        void set_active_state (Gtkmm2ext::ActiveState);
        void set_visual_state (Gtkmm2ext::VisualState);
 
        void set_custom_led_color (const uint32_t c, const bool useit = true);
 
        void set_act_on_release (bool onRelease) { _act_on_release = onRelease; }
 
        Element elements() const { return _elements; }
        void set_elements (Element);
        void add_elements (Element);
 
        ArdourIcon::Icon icon() const { return _icon; }
        void set_icon (ArdourIcon::Icon);
        void set_icon (rendercallback_t, void*);
 
        void set_corner_radius (float);
 
        void set_text (const std::string&, bool markup = false);
        const std::string& get_text () const { return _text; }
        bool get_markup () const { return _markup; }
        void set_angle (const double);
        void set_alignment (const float, const float);
        void get_alignment (float& xa, float& ya) {xa = _xalign; ya = _yalign;};
 
        void set_led_left (bool yn);
        void set_distinct_led_click (bool yn);
 
        void set_layout_ellipsize_width (int w);
        void set_layout_font (const Pango::FontDescription&);
        void set_text_ellipsize (Pango::EllipsizeMode);
        void set_width_padding (float);
 
    /* Sets the text used for size request computation. Pass an
     * empty string to return to the default behavior which uses
     * the currently displayed text for measurement. */
        void set_sizing_text (std::string const&);
        void set_sizing_texts (std::vector<std::string> const&);
 
        sigc::signal<void, GdkEventButton*> signal_led_clicked;
        sigc::signal<void> signal_clicked;
 
        std::shared_ptr<PBD::Controllable> get_controllable() { return binding_proxy.get_controllable(); }
        void set_controllable (std::shared_ptr<PBD::Controllable> c);
        void watch ();
 
        void set_related_action (Glib::RefPtr<Gtk::Action>);
 
        bool on_button_press_event (GdkEventButton*);
        bool on_button_release_event (GdkEventButton*);
 
        void set_image (const Glib::RefPtr<Gdk::Pixbuf>&);
 
        void set_fixed_colors   (const uint32_t active_color, const uint32_t inactive_color);
        void set_active_color   (const uint32_t active_color);
        void set_inactive_color (const uint32_t inactive_color);
        void reset_fixed_colors ();
 
        void set_fallthrough_to_parent(bool fall) { _fallthrough_to_parent = fall; }
 
        unsigned int char_pixel_width() { if (_char_pixel_width < 1) recalc_char_pixel_geometry() ; return _char_pixel_width; }
        unsigned int char_pixel_height() { if (_char_pixel_height < 1) recalc_char_pixel_geometry() ; return _char_pixel_height; }
        float char_avg_pixel_width() { if (_char_pixel_width < 1) recalc_char_pixel_geometry() ; return _char_avg_pixel_width; }
 
        protected:
        void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
        void on_size_request (Gtk::Requisition* req);
        void on_size_allocate (Gtk::Allocation&);
        void on_style_changed (const Glib::RefPtr<Gtk::Style>&);
        void on_name_changed ();
        void on_realize ();
        bool on_enter_notify_event (GdkEventCrossing*);
        bool on_leave_notify_event (GdkEventCrossing*);
        bool on_grab_broken_event(GdkEventGrabBroken*);
        bool on_focus_in_event (GdkEventFocus*);
        bool on_focus_out_event (GdkEventFocus*);
        bool on_key_release_event (GdkEventKey *);
        bool on_key_press_event (GdkEventKey *);
 
        void controllable_changed ();
        PBD::ScopedConnection watch_connection;
 
        protected:
        Glib::RefPtr<Pango::Layout> _layout;
        Glib::RefPtr<Gdk::Pixbuf>   _pixbuf;
        std::string                 _text;
        std::vector<std::string>    _sizing_texts;
        bool                        _markup;
        Element                     _elements;
        ArdourIcon::Icon            _icon;
        rendercallback_t            _icon_render_cb;
        void*                       _icon_render_cb_data;
        Tweaks                      _tweaks;
        BindingProxy                binding_proxy;
 
        void set_text_internal ();
        void recalc_char_pixel_geometry ();
 
        unsigned int _char_pixel_width;
        unsigned int _char_pixel_height;
        float        _char_avg_pixel_width;
        float        _width_padding;
        bool         _custom_font_set;
 
        int   _text_width;
        int   _text_height;
        float _diameter;
        float _corner_radius;
        int   _corner_mask;
 
        double _angle;
        float _xalign, _yalign;
 
        uint32_t fill_inactive_color;
        uint32_t fill_active_color;
 
        uint32_t text_active_color;
        uint32_t text_inactive_color;
 
        uint32_t led_active_color;
        uint32_t led_inactive_color;
        uint32_t led_custom_color;
        bool     use_custom_led_color;
 
        uint32_t outline_color;
 
 
        cairo_pattern_t* convex_pattern;
        cairo_pattern_t* concave_pattern;
        cairo_pattern_t* led_inset_pattern;
        cairo_rectangle_t* _led_rect;
 
        bool _act_on_release;
        bool _auto_toggle;
        bool _led_left;
        bool _distinct_led_click;
        bool _hovering;
        bool _focused;
        int  _fixed_colors_set;
        bool _fallthrough_to_parent;
        int _layout_ellipsize_width;
        Pango::EllipsizeMode _ellipsis;
        bool _update_colors;
        int _pattern_height;
 
        void setup_led_rect ();
        void set_colors ();
        void color_handler ();
        void build_patterns ();
        void ensure_layout ();
 
        void action_toggled ();
        void action_sensitivity_changed ();
        void action_visibility_changed ();
        void action_tooltip_changed ();
};
 
} /* end namespace */
 
#endif