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#ifndef SEEN_SNAP_H
#define SEEN_SNAP_H
/**
* \file snap.h
* \brief SnapManager class.
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Frank Felfe <innerspace@iname.com>
* Carl Hetherington <inkscape@carlh.net>
* Diederik van Lierop <mail@diedenrezi.nl>
*
* Copyright (C) 2006-2007 Johan Engelen <johan@shouraizou.nl>
* Copyright (C) 2000-2002 Lauris Kaplinski
* Copyright (C) 2000-2008 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <vector>
#include <libnr/nr-coord.h>
#include <libnr/nr-dim2.h>
#include <libnr/nr-forward.h>
#include <libnr/nr-scale.h>
#include "guide-snapper.h"
#include "object-snapper.h"
class SPNamedView;
/// Class to coordinate snapping operations
/**
* Each SPNamedView has one of these. It offers methods to snap points to whatever
* snappers are defined (e.g. grid, guides etc.). It also allows callers to snap
* points which have undergone some transformation (e.g. translation, scaling etc.)
*/
class SnapManager
{
public:
SnapManager(SPNamedView const *v);
typedef std::list<const Inkscape::Snapper*> SnapperList;
bool SomeSnapperMightSnap() const;
void setup(SPDesktop const *desktop_for_snapindicator = NULL, SPItem const *item_to_ignore = NULL, std::vector<NR::Point> *unselected_nodes = NULL);
void setup(SPDesktop const *desktop_for_snapindicator, std::vector<SPItem const *> &items_to_ignore, std::vector<NR::Point> *unselected_nodes = NULL);
// freeSnapReturnByRef() is preferred over freeSnap(), because it only returns a
// point if snapping has occured (by overwriting p); otherwise p is untouched
void freeSnapReturnByRef(Inkscape::Snapper::PointType point_type,
NR::Point &p,
bool first_point = true,
NR::Maybe<NR::Rect> const &bbox_to_snap = NR::Nothing()) const;
Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType point_type,
NR::Point const &p,
bool first_point = true,
NR::Maybe<NR::Rect> const &bbox_to_snap = NR::Nothing()) const;
// constrainedSnapReturnByRef() is preferred over constrainedSnap(), because it only returns a
// point, by overwriting p, if snapping has occured; otherwise p is untouched
void constrainedSnapReturnByRef(Inkscape::Snapper::PointType point_type,
NR::Point &p,
Inkscape::Snapper::ConstraintLine const &constraint,
bool first_point = true,
NR::Maybe<NR::Rect> const &bbox_to_snap = NR::Nothing()) const;
Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType point_type,
NR::Point const &p,
Inkscape::Snapper::ConstraintLine const &constraint,
bool first_point = true,
NR::Maybe<NR::Rect> const &bbox_to_snap = NR::Nothing()) const;
void guideSnap(NR::Point &p, NR::Point const &guide_normal) const;
Inkscape::SnappedPoint freeSnapTranslation(Inkscape::Snapper::PointType point_type,
std::vector<NR::Point> const &p,
NR::Point const &tr) const;
Inkscape::SnappedPoint constrainedSnapTranslation(Inkscape::Snapper::PointType point_type,
std::vector<NR::Point> const &p,
Inkscape::Snapper::ConstraintLine const &constraint,
NR::Point const &tr) const;
Inkscape::SnappedPoint freeSnapScale(Inkscape::Snapper::PointType point_type,
std::vector<NR::Point> const &p,
NR::scale const &s,
NR::Point const &o) const;
Inkscape::SnappedPoint constrainedSnapScale(Inkscape::Snapper::PointType point_type,
std::vector<NR::Point> const &p,
NR::scale const &s,
NR::Point const &o) const;
Inkscape::SnappedPoint constrainedSnapStretch(Inkscape::Snapper::PointType point_type,
std::vector<NR::Point> const &p,
NR::Coord const &s,
NR::Point const &o,
NR::Dim2 d,
bool uniform) const;
Inkscape::SnappedPoint constrainedSnapSkew(Inkscape::Snapper::PointType point_type,
std::vector<NR::Point> const &p,
Inkscape::Snapper::ConstraintLine const &constraint,
NR::Point const &s, // s[0] = skew factor, s[1] = scale factor
NR::Point const &o,
NR::Dim2 d) const;
Inkscape::GuideSnapper guide; ///< guide snapper
Inkscape::ObjectSnapper object; ///< snapper to other objects
SnapperList getSnappers() const;
SnapperList getGridSnappers() const;
void setSnapModeBBox(bool enabled);
void setSnapModeNode(bool enabled);
void setSnapModeGuide(bool enabled);
bool getSnapModeBBox() const;
bool getSnapModeNode() const;
bool getSnapModeGuide() const;
void setSnapIntersectionGG(bool enabled) {_intersectionGG = enabled;}
void setSnapIntersectionLS(bool enabled) {_intersectionLS = enabled;}
bool getSnapIntersectionGG() {return _intersectionGG;}
bool getSnapIntersectionLS() {return _intersectionLS;}
void setIncludeItemCenter(bool enabled) {
_include_item_center = enabled;
// also store a local copy in the object-snapper instead of passing it through many functions
object.setIncludeItemCenter(enabled);
}
bool getIncludeItemCenter() const {
return _include_item_center;
}
void setSnapEnabledGlobally(bool enabled) {
_snap_enabled_globally = enabled;
}
bool getSnapEnabledGlobally() const {
return _snap_enabled_globally;
}
void toggleSnapEnabledGlobally() {
_snap_enabled_globally = !_snap_enabled_globally;
}
protected:
SPNamedView const *_named_view;
private:
enum Transformation {
TRANSLATION,
SCALE,
STRETCH,
SKEW
};
bool _include_item_center; //If true, snapping nodes will also snap the item's center
bool _intersectionGG;
bool _intersectionLS;
bool _snap_enabled_globally; //Toggles ALL snapping
std::vector<SPItem const *> *_items_to_ignore;
SPItem const *_item_to_ignore;
SPDesktop const *_desktop_for_snapindicator;
std::vector<NR::Point> *_unselected_nodes;
Inkscape::SnappedPoint _snapTransformed(Inkscape::Snapper::PointType type,
std::vector<NR::Point> const &points,
bool constrained,
Inkscape::Snapper::ConstraintLine const &constraint,
Transformation transformation_type,
NR::Point const &transformation,
NR::Point const &origin,
NR::Dim2 dim,
bool uniform) const;
Inkscape::SnappedPoint findBestSnap(NR::Point const &p, SnappedConstraints &sc, bool constrained) const;
};
#endif /* !SEEN_SNAP_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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