ImageView.hh

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#pragma once
 
#include <gtkmm/box.h>
#include <gtkmm/image.h>
#include <gtkmm/eventbox.h>
 
namespace cadabra {
 
 
    class ImageView : public Gtk::EventBox {
        public:
            ImageView(double scale);
            virtual ~ImageView();
 
            void set_image_from_base64(const std::string& b64);
            void set_image_from_svg(const std::string& svg);
 
            virtual bool on_motion_notify_event(GdkEventMotion *event) override;
            virtual bool on_button_press_event(GdkEventButton *event) override;
            virtual bool on_button_release_event(GdkEventButton *event) override;
 
        private:
            std::string decoded; // raw byte content of image
            bool        is_raster;
            
            Gtk::VBox   vbox;
            Gtk::Image  image;
            Glib::RefPtr<Gdk::Pixbuf> pixbuf;
 
            bool   sizing;
            double prev_x, prev_y;
            int    height_at_press, width_at_press;
            double scale;
 
            // Re-render the image from the raw bytes at the current
            // resolution of the image widget (or 400 if not set).
            void rerender(int override_width=0);
        };
 
    };