seltrans.h revision d61d2d7858ded67cc041d49e7c81a10a84c9e164
#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, read the file 'COPYING' for more information
*/
#include <stddef.h>
#include <sigc++/sigc++.h>
#include <2geom/point.h>
#include <2geom/affine.h>
#include <2geom/rect.h>
#include "knot.h"
#include "selcue.h"
#include "message-context.h"
#include <vector>
#include "sp-item.h"
struct SPKnot;
class SPDesktop;
struct SPCanvasItem;
struct SPCtrlLine;
struct SPSelTransHandle;
namespace Inkscape
{
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();
Inkscape::MessageContext &messageContext() {
return _message_context;
}
void increaseState();
void resetState();
void setCenter(Geom::Point const &p);
void grab(Geom::Point const &p, gdouble x, gdouble 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, guint state);
void stretch(SPSelTransHandle const &handle, Geom::Point &pt, guint state);
void scale(Geom::Point &pt, guint state);
void skew(SPSelTransHandle const &handle, Geom::Point &pt, guint state);
void rotate(Geom::Point &pt, guint state);
gboolean scaleRequest(Geom::Point &pt, guint state);
gboolean stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state);
gboolean skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state);
gboolean rotateRequest(Geom::Point &pt, guint state);
gboolean centerRequest(Geom::Point &pt, guint state);
gboolean handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle);
void handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle);
void handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle);
void handleNewEvent(SPKnot *knot, Geom::Point *position, guint 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 ( _chandle && SP_KNOT_IS_VISIBLE (_chandle) );
}
void getNextClosestPoint(bool reverse);
private:
void _updateHandles();
void _updateVolatileState();
void _selChanged(Inkscape::Selection *selection);
void _selModified(Inkscape::Selection *selection, guint flags);
void _showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
gchar const *even_tip, gchar const *odd_tip);
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
};
SPDesktop *_desktop;
std::vector<SPItem *> _items;
std::vector<SPItem const *> _items_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;
bool _show_handles;
bool _empty;
bool _changed;
SPItem::BBoxType _snap_bbox_type;
Geom::OptRect _bbox;
Geom::OptRect _visual_bbox;
Geom::OptRect _geometric_bbox;
gdouble _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;
gdouble _handle_x;
gdouble _handle_y;
boost::optional<Geom::Point> _center;
bool _center_is_set; ///< we've already set _center, no need to reread it from items
SPKnot *_shandle[8];
SPKnot *_rhandle[8];
SPKnot *_chandle;
SPCanvasItem *_norm;
SPCanvasItem *_grip;
SPCtrlLine *_l[4];
guint _sel_changed_id;
guint _sel_modified_id;
GSList *_stamp_cache;
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;
};
}
#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 :