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// 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"
namespace Inkscape {
class CanvasItemGroup; // A canvas control that contains other canvas controls.
class CanvasItemGuideHandle; // A handle ("dot") serving as draggable origin control
class CanvasItemGuideLine : public CanvasItem {
public:
CanvasItemGuideLine(CanvasItemGroup *group, Glib::ustring label,
Geom::Point const &origin, Geom::Point const &normal);
~CanvasItemGuideLine() override;
// Geometry
void set_origin(Geom::Point const &origin);
void set_normal(Geom::Point const &normal);
bool is_horizontal() const { return (_normal.x() == 0.0); }
bool is_vertical() const { return (_normal.y() == 0.0); }
void update(Geom::Affine const &affine) override;
double closest_distance_to(Geom::Point const &p);
// Selection
bool contains(Geom::Point const &p, double tolerance = 0) override;
// Display
void render(Inkscape::CanvasItemBuffer *buf) override;
// Properties
void hide() override;
void show() override;
void set_stroke(guint32 color) final;
void set_label(Glib::ustring const & label);
void set_locked(bool locked);
void set_inverted(bool inverted);
void set_sensitive(bool sensitive) { _sensitive = sensitive; }
// Getters
CanvasItemGuideHandle* dot() const;
protected:
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;
bool _sensitive = false;
std::unique_ptr<CanvasItemGuideHandle> _origin_ctrl;
private:
inline static guint32 const CONTROL_LOCKED_COLOR = 0x00000080; // RGBA black semitranslucent
inline static double const LABEL_SEP = 2.0; // Distance between the label and the origin control
};
class CanvasItemGuideHandle : public CanvasItemCtrl {
public:
CanvasItemGuideHandle(CanvasItemGroup *group, Geom::Point const &pos, CanvasItemGuideLine *line);
double radius() const;
void set_size_via_index(int index) final;
private:
CanvasItemGuideLine *_my_line; // The guide line we belong to
// static data
inline static double const SCALE = 0.55; // handle size relative to an auto-smooth node
inline static unsigned const 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 :
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