diff options
Diffstat (limited to 'src/display/control/canvas-item-curve.h')
-rw-r--r-- | src/display/control/canvas-item-curve.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/display/control/canvas-item-curve.h b/src/display/control/canvas-item-curve.h new file mode 100644 index 0000000..8e1f9b5 --- /dev/null +++ b/src/display/control/canvas-item-curve.h @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_CANVAS_ITEM_CURVE_H +#define SEEN_CANVAS_ITEM_CURVE_H + +/** + * A class to represent a single Bezier control curve. + */ + +/* + * Author: + * Tavmjong Bah + * + * Copyright (C) 2020 Tavmjong Bah + * + * Rewrite of SPCtrlLine and SPCtrlCurve + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <memory> +#include <2geom/path.h> + +#include "canvas-item.h" + +namespace Inkscape { + +class CanvasItemCurve final : public CanvasItem +{ +public: + CanvasItemCurve(CanvasItemGroup *group); + CanvasItemCurve(CanvasItemGroup *group, Geom::Point const &p0, Geom::Point const &p1); + CanvasItemCurve(CanvasItemGroup *group, Geom::Point const &p0, Geom::Point const &p1, + Geom::Point const &p2, Geom::Point const &p3); + + // Geometry + void set_coords(Geom::Point const &p0, Geom::Point const &p1); + void set_coords(Geom::Point const &p0, Geom::Point const &p1, Geom::Point const &p2, Geom::Point const &p3); + void set_width(int width); + void set_bg_alpha(float alpha); + bool is_line() const { return _curve->size() == 2; } + + double closest_distance_to(Geom::Point const &p) const; + + // Selection + bool contains(Geom::Point const &p, double tolerance = 0) override; + +protected: + ~CanvasItemCurve() override = default; + + void _update(bool propagate) override; + void _render(Inkscape::CanvasItemBuffer &buf) const override; + + // Display + std::unique_ptr<Geom::BezierCurve> _curve; + + int _width = 1; + int background_width = 3; // this should be an odd number so that the background appears on both the sides of the curve. + float bg_alpha = 0.5f; +}; + +} // namespace Inkscape + +#endif // SEEN_CANVAS_ITEM_CURVE_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 : |