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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_CANVAS_ITEM_ROTATE_H
#define SEEN_CANVAS_ITEM_ROTATE_H
/**
* A class for previewing a canvas rotation.
*/
/*
* Author:
* Tavmjong Bah
*
* Copyright (C) 2020 Tavmjong Bah
*
* Rewrite of RotateCanvasItem.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <2geom/point.h>
#include <2geom/transforms.h>
#include "canvas-item.h"
class SPDesktop;
namespace Inkscape {
class CanvasRotate;
namespace UI::Widget {
class Canvas;
}
class CanvasItemGroup; // A canvas control that contains other canvas controls.
class CanvasItemRotate : public CanvasItem {
public:
CanvasItemRotate(CanvasItemGroup *group);
// Geometry
void update(Geom::Affine const &affine) override;
double closest_distance_to(Geom::Point const &p); // Maybe not needed
// Selection
bool contains(Geom::Point const &p, double tolerance = 0) override;
// Display
void render(Inkscape::CanvasItemBuffer *buf) override;
// Events
bool handle_event(GdkEvent *event) override;
void start(SPDesktop *desktop);
void paint();
protected:
SPDesktop *_desktop = nullptr;
Geom::Point _center; // Center of screen.
Geom::Point _cursor; // Position of cursor relative to center (after angle snapping).
double _current_angle = 0.0; // Rotation in degrees.
double _start_angle = -1000; // Initial angle, determined by cursor position.
Cairo::RefPtr<Cairo::ImageSurface> _surface_copy; // Copy of original surface.
};
} // namespace Inkscape
#endif // SEEN_CANVAS_ITEM_ROTATE_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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