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ImageDrawable.hpp
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ImageDrawable.hpp
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/*
Copyright 2015,2020 Simon Arlott
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef fiv__IMAGEDRAWABLE_H_
#define fiv__IMAGEDRAWABLE_H_
#include <cairomm/context.h>
#include <cairomm/refptr.h>
#include <glib.h>
#include <gdk/gdk.h>
#include <gtkmm/drawingarea.h>
#include <gtkmm/gesture.h>
#include <memory>
#include "Image.hpp"
class Fiv;
class ImageDrawable: public Gtk::DrawingArea {
public:
ImageDrawable();
void setImages(std::shared_ptr<Fiv> images);
void update();
void redraw();
void loaded();
void zoomActual();
void zoomFit();
void toggleAfPoints();
void dragBegin(double startX, double startY);
void dragUpdate(double offsetX, double offsetY);
void dragEnd(double offsetX, double offsetY);
void applyZoom(double scale);
private:
void inline calcRenderedImage(std::shared_ptr<Image> image, const Gtk::Allocation &allocation,
int &rwidth, int &rheight, double &rscale, double &rx, double &ry);
void finalisePosition();
void drawImage(const Cairo::RefPtr<Cairo::Context> &cr, const Gtk::Allocation &allocation);
bool on_draw(const Cairo::RefPtr<Cairo::Context> &cr) override;
bool on_scroll_event(GdkEventScroll *scroll) override;
std::shared_ptr<Fiv> images;
bool waiting;
bool afPoints;
double zoom;
double x, y;
double dragOffsetX, dragOffsetY;
};
#endif /* fiv__IMAGEDRAWABLE_H_ */