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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_KNOT_HOLDER_ENTITY_H
+#define SEEN_KNOT_HOLDER_ENTITY_H
+/*
+ * Authors:
+ * Mitsuru Oka <oka326@parkcity.ne.jp>
+ * Maximilian Albert <maximilian.albert@gmail.com>
+ *
+ * Copyright (C) 1999-2001 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ * Copyright (C) 2001 Mitsuru Oka
+ * Copyright (C) 2004 Monash University
+ * Copyright (C) 2008 Maximilian Albert
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/forward.h>
+
+#include "knot.h"
+#include "snapper.h"
+
+#include "display/control/canvas-item-enums.h"
+#include "display/control/canvas-item-quad.h"
+#include "display/control/canvas-item-curve.h"
+#include "helper/auto-connection.h"
+#include "display/control/canvas-item-ptr.h"
+
+class SPHatch;
+class SPItem;
+class SPKnot;
+class SPDesktop;
+class SPPattern;
+class SPGaussianBlur;
+class KnotHolder;
+
+namespace Inkscape {
+namespace LivePathEffect {
+ class Effect;
+} // namespace LivePathEffect
+} // namespace Inkscape
+
+typedef void (* SPKnotHolderSetFunc) (SPItem *item, Geom::Point const &p, Geom::Point const &origin, unsigned int state);
+typedef Geom::Point (* SPKnotHolderGetFunc) (SPItem *item);
+
+/**
+ * KnotHolderEntity definition.
+ */
+class KnotHolderEntity {
+public:
+ KnotHolderEntity() {}
+ virtual ~KnotHolderEntity();
+
+ void create(SPDesktop *desktop, SPItem *item, KnotHolder *parent,
+ Inkscape::CanvasItemCtrlType type = Inkscape::CANVAS_ITEM_CTRL_TYPE_DEFAULT,
+ Glib::ustring const & name = Glib::ustring("unknown"),
+ char const *tip = "",
+ guint32 color = 0xffffff00);
+
+ /* the get/set/click handlers are virtual functions; each handler class for a knot
+ should be derived from KnotHolderEntity and override these functions */
+ virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) = 0;
+ virtual void knot_grabbed(Geom::Point const &/*grab_position*/, unsigned /*state*/) {}
+ virtual void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, unsigned int state) = 0;
+ virtual bool knot_missing() const { return false; }
+ virtual Geom::Point knot_get() const = 0;
+ virtual void knot_click(unsigned int /*state*/) {}
+ virtual bool set_item_clickpos(Geom::Point loc) { return false; }
+
+ virtual void on_created() {}
+ virtual void update_knot();
+
+ // private:
+ Geom::Point snap_knot_position(Geom::Point const &p, unsigned int state);
+ Geom::Point snap_knot_position_constrained(Geom::Point const &p, Inkscape::Snapper::SnapConstraint const &constraint, unsigned int state);
+
+ SPKnot *knot = nullptr;
+ SPItem *item = nullptr;
+ SPDesktop *desktop = nullptr;
+ KnotHolder *parent_holder = nullptr;
+
+ int my_counter = 0;
+ inline static int counter = 0;
+
+ /** Connection to \a knot's "moved" signal. */
+ unsigned int handler_id = 0;
+ /** Connection to \a knot's "clicked" signal. */
+ unsigned int _click_handler_id = 0;
+ /** Connection to \a knot's "ungrabbed" signal. */
+ unsigned int _ungrab_handler_id = 0;
+
+private:
+ sigc::connection _mousedown_connection;
+ sigc::connection _moved_connection;
+ sigc::connection _click_connection;
+ sigc::connection _ungrabbed_connection;
+};
+
+// derived KnotHolderEntity class for LPEs
+class LPEKnotHolderEntity : public KnotHolderEntity {
+public:
+ LPEKnotHolderEntity(Inkscape::LivePathEffect::Effect *effect) : _effect(effect) {};
+ void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override;
+protected:
+ Inkscape::LivePathEffect::Effect *_effect;
+};
+
+/* pattern manipulation */
+
+class PatternKnotHolderEntity : public KnotHolderEntity {
+ public:
+ PatternKnotHolderEntity(bool fill) : KnotHolderEntity(), _fill(fill) {}
+ void on_created() override;
+ bool knot_missing() const override;
+ void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override{};
+ bool set_item_clickpos(Geom::Point loc) override;
+ void update_knot() override;
+
+protected:
+ // true if the entity tracks fill, false for stroke
+ bool _fill;
+ SPPattern *_pattern() const;
+ Geom::Point _get_pos(gdouble x, gdouble y, bool transform = true) const;
+ Geom::IntPoint offset_to_cell(Geom::Point loc) const;
+ Geom::IntPoint _cell;
+};
+
+class PatternKnotHolderEntityXY : public PatternKnotHolderEntity {
+public:
+ PatternKnotHolderEntityXY(bool fill) : PatternKnotHolderEntity(fill) {}
+ ~PatternKnotHolderEntityXY() override = default;
+
+ void on_created() override;
+ void update_knot() override;
+ Geom::Point knot_get() const override;
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+
+private:
+ // Extra visual element to show the pattern editing area
+ CanvasItemPtr<Inkscape::CanvasItemQuad> _quad;
+};
+
+class PatternKnotHolderEntityAngle : public PatternKnotHolderEntity {
+public:
+ PatternKnotHolderEntityAngle(bool fill) : PatternKnotHolderEntity(fill) {}
+ Geom::Point knot_get() const override;
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+};
+
+class PatternKnotHolderEntityScale : public PatternKnotHolderEntity {
+public:
+ PatternKnotHolderEntityScale(bool fill) : PatternKnotHolderEntity(fill) {}
+ Geom::Point knot_get() const override;
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+ void knot_grabbed(Geom::Point const &grab_pos, unsigned state) override;
+
+private:
+ /// Maximum number of pattern repetitons allowed in an item
+ inline static double const MAX_REPETITIONS = 1e6;
+ Geom::Affine _cached_transform, _cached_inverse_linear;
+ Geom::Point _cached_origin, _cached_diagonal;
+ double _cached_min_scale;
+};
+
+/* Hatch manipulation */
+class HatchKnotHolderEntity : public KnotHolderEntity {
+ public:
+ HatchKnotHolderEntity(bool fill)
+ : KnotHolderEntity()
+ , _fill(fill)
+ {
+ }
+ bool knot_missing() const override;
+ void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override{};
+
+ protected:
+ // true if the entity tracks fill, false for stroke
+ bool _fill;
+ SPHatch *_hatch() const;
+};
+
+class HatchKnotHolderEntityXY : public HatchKnotHolderEntity {
+ public:
+ HatchKnotHolderEntityXY(bool fill)
+ : HatchKnotHolderEntity(fill)
+ {
+ }
+ Geom::Point knot_get() const override;
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+};
+
+class HatchKnotHolderEntityAngle : public HatchKnotHolderEntity {
+ public:
+ HatchKnotHolderEntityAngle(bool fill)
+ : HatchKnotHolderEntity(fill)
+ {
+ }
+ Geom::Point knot_get() const override;
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+};
+
+class HatchKnotHolderEntityScale : public HatchKnotHolderEntity {
+ public:
+ HatchKnotHolderEntityScale(bool fill)
+ : HatchKnotHolderEntity(fill)
+ {
+ }
+ Geom::Point knot_get() const override;
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+};
+
+
+/* Filter manipulation */
+class FilterKnotHolderEntity : public KnotHolderEntity {
+ public:
+ FilterKnotHolderEntity(bool topleft) : KnotHolderEntity(), _topleft(topleft) {}
+ Geom::Point knot_get() const override;
+ void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override {};
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+private:
+ bool _topleft; // true for topleft point, false for bottomright
+};
+
+class BlurKnotHolderEntity : public KnotHolderEntity {
+ public:
+ BlurKnotHolderEntity(int direction) : KnotHolderEntity(), _dir(direction) {}
+ void on_created() override;
+ void update_knot() override;
+ Geom::Point knot_get() const override;
+ void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override {};
+ void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
+
+ private:
+ SPGaussianBlur *_blur() const;
+ Geom::Point _pos() const;
+
+ int _dir;
+ CanvasItemPtr<Inkscape::CanvasItemCurve> _line;
+ Inkscape::auto_connection _watch_filter;
+ Inkscape::auto_connection _watch_blur;
+};
+
+#endif /* !SEEN_KNOT_HOLDER_ENTITY_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:fileencoding=utf-8:textwidth=99 :
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