src/snap.h

   1 #ifndef SEEN_SNAP_H
   2 #define SEEN_SNAP_H
   3
   4 /**
   5  * \file snap.h
   6  * \brief Various snapping methods.
   7  *
   8  * Authors:
   9  *   Lauris Kaplinski <lauris@kaplinski.com>
  10  *   Frank Felfe <innerspace@iname.com>
  11  *   Carl Hetherington <inkscape@carlh.net>
  12  *
  13  * Copyright (C) 2000-2002 Lauris Kaplinski
  14  *
  15  * Released under GNU GPL, read the file 'COPYING' for more information
  16  */
  17
  18 #include <vector>
  19
  20 #include <libnr/nr-coord.h>
  21 #include <libnr/nr-dim2.h>
  22 #include <libnr/nr-forward.h>
  23 #include <libnr/nr-scale.h>
  24 #include "grid-snapper.h"
  25 #include "guide-snapper.h"
  26 #include "object-snapper.h"
  27
  28 class SPNamedView;
  29
  30 class SnapManager
  31 {
  32 public:
  33     SnapManager(SPNamedView const *v);
  34
  35     bool willSnapSomething() const;
  36
  37     Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
  38                                     NR::Point const &p,
  39                                     SPItem const *it) const;
  40
  41     Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
  42                                     NR::Point const &p,
  43                                     std::list<SPItem const *> const &it) const;
  44
  45     Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
  46                                            NR::Point const &p,
  47                                            Inkscape::Snapper::ConstraintLine const &c,
  48                                            SPItem const *it) const;
  49
  50     Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
  51                                            NR::Point const &p,
  52                                            Inkscape::Snapper::ConstraintLine const &c,
  53                                            std::list<SPItem const *> const &it) const;
  54
  55     std::pair<NR::Point, bool> freeSnapTranslation(Inkscape::Snapper::PointType t,
  56                                                    std::vector<NR::Point> const &p,
  57                                                    std::list<SPItem const *> const &it,
  58                                                    NR::Point const &tr) const;
  59
  60     std::pair<NR::Point, bool> constrainedSnapTranslation(Inkscape::Snapper::PointType t,
  61                                                           std::vector<NR::Point> const &p,
  62                                                           std::list<SPItem const *> const &it,
  63                                                           Inkscape::Snapper::ConstraintLine const &c,
  64                                                           NR::Point const &tr) const;
  65
  66     std::pair<NR::scale, bool> freeSnapScale(Inkscape::Snapper::PointType t,
  67                                              std::vector<NR::Point> const &p,
  68                                              std::list<SPItem const *> const &it,
  69                                              NR::scale const &s,
  70                                              NR::Point const &o) const;
  71
  72     std::pair<NR::scale, bool> constrainedSnapScale(Inkscape::Snapper::PointType t,
  73                                                     std::vector<NR::Point> const &p,
  74                                                     std::list<SPItem const *> const &it,
  75                                                     Inkscape::Snapper::ConstraintLine const &c,
  76                                                     NR::scale const &s,
  77                                                     NR::Point const &o) const;
  78
  79     std::pair<NR::Coord, bool> freeSnapStretch(Inkscape::Snapper::PointType t,
  80                                                std::vector<NR::Point> const &p,
  81                                                std::list<SPItem const *> const &it,
  82                                                NR::Coord const &s,
  83                                                NR::Point const &o,
  84                                                NR::Dim2 d,
  85                                                bool uniform) const;
  86
  87     Inkscape::GridSnapper grid;
  88     Inkscape::GuideSnapper guide;
  89     Inkscape::ObjectSnapper object;
  90
  91     typedef std::list<const Inkscape::Snapper*> SnapperList;
  92     SnapperList getSnappers() const;
  93
  94 private:
  95
  96     enum Transformation {
  97         TRANSLATION,
  98         SCALE,
  99         STRETCH
 100     };
 101
 102     std::pair<NR::Point, bool> _snapTransformed(Inkscape::Snapper::PointType type,
 103                                                 std::vector<NR::Point> const &points,
 104                                                 std::list<SPItem const *> const &ignore,
 105                                                 bool constrained,
 106                                                 Inkscape::Snapper::ConstraintLine const &constraint,
 107                                                 Transformation transformation_type,
 108                                                 NR::Point const &transformation,
 109                                                 NR::Point const &origin,
 110                                                 NR::Dim2 dim,
 111                                                 bool uniform) const;
 112 };
 113
 114
 115 /* Single point methods */
 116 NR::Coord namedview_vector_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point &req,
 117                                 NR::Point const &d, std::list<SPItem const *> const &it);
 118 NR::Coord namedview_vector_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point &req,
 119                                 NR::Point const &d, SPItem const *it);
 120 NR::Coord namedview_dim_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point& req,
 121                              NR::Dim2 const dim, SPItem const *it);
 122 NR::Coord namedview_dim_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point& req,
 123                              NR::Dim2 const dim, std::list<SPItem const *> const &it);
 124
 125 /* List of points methods */
 126
 127 NR::Coord namedview_dim_snap_list_skew(SPNamedView const *nv, Inkscape::Snapper::PointType t,
 128                                        const std::vector<NR::Point> &p,
 129                                        NR::Point const &norm, double const sx, NR::Dim2 const dim);
 130
 131
 132 #endif /* !SEEN_SNAP_H */
 133
 134 /*
 135   Local Variables:
 136   mode:c++
 137   c-file-style:"stroustrup"
 138   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 139   indent-tabs-mode:nil
 140   fill-column:99
 141   End:
 142 */
 143 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :