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Diffstat (limited to 'src/display/control/canvas-item-guideline.h')
-rw-r--r-- | src/display/control/canvas-item-guideline.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/display/control/canvas-item-guideline.h b/src/display/control/canvas-item-guideline.h new file mode 100644 index 0000000..424fb27 --- /dev/null +++ b/src/display/control/canvas-item-guideline.h @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_CANVAS_ITEM_GUIDELINE_H +#define SEEN_CANVAS_ITEM_GUIDELINE_H + +/** + * A class to represent a control guide line. + */ + +/* + * Authors: + * Tavmjong Bah - Rewrite of SPGuideLine + * Rafael Siejakowski - Tweaks to handle appearance + * + * Copyright (C) 2020-2022 the Authors. + * + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <glibmm/ustring.h> + +#include <2geom/point.h> +#include <2geom/transforms.h> + +#include "canvas-item.h" +#include "canvas-item-ctrl.h" +#include "canvas-item-ptr.h" + +namespace Inkscape { + +class CanvasItemGuideHandle; + +class CanvasItemGuideLine final : public CanvasItem +{ +public: + CanvasItemGuideLine(CanvasItemGroup *group, Glib::ustring label, Geom::Point const &origin, Geom::Point const &normal); + + // Geometry + void set_origin(Geom::Point const &origin); + void set_normal(Geom::Point const &normal); + double closest_distance_to(Geom::Point const &p); + + // Selection + bool contains(Geom::Point const &p, double tolerance = 0) override; + + // Properties + void set_visible(bool visible) override; + void set_stroke(uint32_t color) override; + void set_label(Glib::ustring &&label); + void set_locked(bool locked); + void set_inverted(bool inverted); + + // Getters + CanvasItemGuideHandle *dot() const; + +protected: + ~CanvasItemGuideLine() override = default; + + void _update(bool propagate) override; + void _render(Inkscape::CanvasItemBuffer &buf) const override; + + Geom::Point _origin; + Geom::Point _normal = Geom::Point(0, 1); + Glib::ustring _label; + bool _locked = true; // Flipped in constructor to trigger init of _origin_ctrl. + bool _inverted = false; + CanvasItemPtr<CanvasItemGuideHandle> _origin_ctrl; + + static constexpr uint32_t CONTROL_LOCKED_COLOR = 0x00000080; // RGBA black semitranslucent + static constexpr double LABEL_SEP = 2.0; // Distance between the label and the origin control +}; + +// A handle ("dot") serving as draggable origin control +class CanvasItemGuideHandle final : public CanvasItemCtrl +{ +public: + CanvasItemGuideHandle(CanvasItemGroup *group, Geom::Point const &pos, CanvasItemGuideLine *line); + double radius() const; + void set_size_via_index(int index) override; + +protected: + ~CanvasItemGuideHandle() override = default; + + CanvasItemGuideLine *_my_line; // The guide line we belong to + + // static data + static constexpr double SCALE = 0.55; // handle size relative to an auto-smooth node + static constexpr unsigned MINIMUM_SIZE = 7; // smallest handle size, must be an odd int +}; + +} // namespace Inkscape + +#endif // SEEN_CANVAS_ITEM_GUIDELINE_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 : |