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Diffstat (limited to 'src/seltrans.h')
| -rw-r--r-- | src/seltrans.h | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/seltrans.h b/src/seltrans.h new file mode 100644 index 0000000..7a4e083 --- /dev/null +++ b/src/seltrans.h @@ -0,0 +1,211 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_SELTRANS_H +#define SEEN_SELTRANS_H + +/* + * Helper object for transforming selected items + * + * Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * Carl Hetherington <inkscape@carlh.net> + * Diederik van Lierop <mail@diedenrezi.nl> + * + * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl> + * Copyright (C) 1999-2002 Lauris Kaplinski + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <2geom/point.h> +#include <2geom/affine.h> +#include <2geom/rect.h> +#include <cstddef> +#include <sigc++/sigc++.h> +#include <vector> + +#include "message-context.h" +#include "seltrans-handles.h" +#include "selcue.h" + +#include "object/sp-item.h" +#include "ui/knot/knot.h" + +class SPDesktop; +struct SPCanvasItem; +struct SPSelTransHandle; + +namespace Inkscape { + +class CanvasItemCtrl; +class CanvasItemCurve; + +Geom::Scale calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew = false); + +namespace XML { + class Node; +} + +class SelTrans +{ +public: + SelTrans(SPDesktop *desktop); + ~SelTrans(); + + void increaseState(); + void resetState(); + void setCenter(Geom::Point const &p); + void grab(Geom::Point const &p, double x, double y, bool show_handles, bool translating); + void transform(Geom::Affine const &rel_affine, Geom::Point const &norm); + void ungrab(); + void stamp(); + void moveTo(Geom::Point const &xy, unsigned int state); + void stretch(SPSelTransHandle const &handle, Geom::Point &pt, unsigned int state); + void scale(Geom::Point &pt, unsigned int state); + void skew(SPSelTransHandle const &handle, Geom::Point &pt, unsigned int state); + void rotate(Geom::Point &pt, unsigned int state); + void align(guint state, SPSelTransHandle const &handle); + int request(SPSelTransHandle const &handle, Geom::Point &pt, unsigned int state); + int scaleRequest(Geom::Point &pt, unsigned int state); + int stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, unsigned int state); + int skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, unsigned int state); + int rotateRequest(Geom::Point &pt, unsigned int state); + int centerRequest(Geom::Point &pt, unsigned int state); + + int handleRequest(SPKnot *knot, Geom::Point *position, unsigned int state, SPSelTransHandle const &handle); + void handleGrab(SPKnot *knot, unsigned int state, SPSelTransHandle const &handle); + void handleClick(SPKnot *knot, unsigned int state, SPSelTransHandle const &handle); + void handleNewEvent(SPKnot *knot, Geom::Point *position, unsigned int state, SPSelTransHandle const &handle); + + enum Show + { + SHOW_CONTENT, + SHOW_OUTLINE + }; + + void setShow(Show s) { + _show = s; + } + bool isEmpty() { + return _empty; + } + bool isGrabbed() { + return _grabbed; + } + bool centerIsVisible() { + return ( knots[0]->is_visible()); + } + + void getNextClosestPoint(bool reverse); + +private: + class BoundingBoxPrefsObserver: public Preferences::Observer + { + public: + BoundingBoxPrefsObserver(SelTrans &sel_trans); + + void notify(Preferences::Entry const &val) override; + + private: + SelTrans &_sel_trans; + }; + + friend class Inkscape::SelTrans::BoundingBoxPrefsObserver; + + void _updateHandles(); + void _updateVolatileState(); + void _selChanged(Inkscape::Selection *selection); + void _selModified(Inkscape::Selection *selection, unsigned int flags); + void _boundingBoxPrefsChanged(int prefs_bbox); + void _makeHandles(); + void _showHandles(SPSelTransType type); + Geom::Point _getGeomHandlePos(Geom::Point const &visual_handle_pos); + Geom::Point _calcAbsAffineDefault(Geom::Scale const default_scale); + Geom::Point _calcAbsAffineGeom(Geom::Scale const geom_scale); + void _keepClosestPointOnly(Geom::Point const &p); + + enum State { + STATE_SCALE, //scale or stretch + STATE_ROTATE, //rotate or skew + STATE_ALIGN //on canvas align + }; + + SPDesktop *_desktop; + + std::vector<SPItem *> _items; + std::vector<SPObject const *> _objects_const; + std::vector<Geom::Affine> _items_affines; + std::vector<Geom::Point> _items_centers; + + std::vector<Inkscape::SnapCandidatePoint> _snap_points; + std::vector<Inkscape::SnapCandidatePoint> _bbox_points; + std::vector<Inkscape::SnapCandidatePoint> _all_snap_sources_sorted; + std::vector<Inkscape::SnapCandidatePoint>::iterator _all_snap_sources_iter; + Inkscape::SelCue _selcue; + + Inkscape::Selection *_selection; + State _state; + Show _show; + + bool _grabbed = false; + bool _show_handles = true; + bool _empty; + bool _changed; + + SPItem::BBoxType _snap_bbox_type; + + Geom::OptRect _bbox; + Geom::OptRect _stroked_bbox; + Geom::OptRect _geometric_bbox; + double _strokewidth; + + Geom::Affine _current_relative_affine; + Geom::Affine _absolute_affine; + Geom::Affine _relative_affine; + /* According to Merriam - Webster's online dictionary + * Affine: a transformation (as a translation, a rotation, or a uniform stretching) that carries straight + * lines into straight lines and parallel lines into parallel lines but may alter distance between points + * and angles between lines <affine geometry> + */ + + Geom::Point _opposite; ///< opposite point to where a scale is taking place + Geom::Point _opposite_for_specpoints; + Geom::Point _opposite_for_bboxpoints; + Geom::Point _origin_for_specpoints; + Geom::Point _origin_for_bboxpoints; + + double _handle_x; + double _handle_y; + + std::optional<Geom::Point> _center; + bool _center_is_set; ///< we've already set _center, no need to reread it from items + + SPKnot *knots[NUMHANDS]; + Inkscape::CanvasItemCtrl *_norm; + Inkscape::CanvasItemCtrl *_grip; + Inkscape::CanvasItemCurve *_l[4]; + std::vector<SPItem*> _stamp_cache; + bool _stamped = false; + Geom::Point _origin; ///< position of origin for transforms + Geom::Point _point; ///< original position of the knot being used for the current transform + Geom::Point _point_geom; ///< original position of the knot being used for the current transform + Inkscape::MessageContext _message_context; + sigc::connection _sel_changed_connection; + sigc::connection _sel_modified_connection; + BoundingBoxPrefsObserver _bounding_box_prefs_observer; +}; + +} + +#endif // SEEN_SELTRANS_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 : |