1 #ifndef SEEN_KNOT_HOLDER_ENTITY_H
2 #define SEEN_KNOT_HOLDER_ENTITY_H
4 /** \file
5 * KnotHolderEntity definition.
6 *
7 * Authors:
8 * Mitsuru Oka <oka326@parkcity.ne.jp>
9 * Maximilian Albert <maximilian.albert@gmail.com>
10 *
11 * Copyright (C) 1999-2001 Lauris Kaplinski
12 * Copyright (C) 2000-2001 Ximian, Inc.
13 * Copyright (C) 2001 Mitsuru Oka
14 * Copyright (C) 2004 Monash University
15 * Copyright (C) 2008 Maximilian Albert
16 *
17 * Released under GNU GPL
18 */
20 #include <glib/gtypes.h>
21 #include "knot.h"
22 #include <libnr/nr-forward.h>
24 struct SPItem;
25 struct SPKnot;
27 class SPDesktop;
28 class KnotHolder;
30 typedef void (* SPKnotHolderSetFunc) (SPItem *item, NR::Point const &p, NR::Point const &origin, guint state);
31 typedef NR::Point (* SPKnotHolderGetFunc) (SPItem *item);
32 /* fixme: Think how to make callbacks most sensitive (Lauris) */
33 typedef void (* SPKnotHolderReleasedFunc) (SPItem *item);
35 class KnotHolderEntity {
36 public:
37 KnotHolderEntity() {}
38 virtual ~KnotHolderEntity();
39 virtual void create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip = "",
40 SPKnotShapeType shape = SP_KNOT_SHAPE_DIAMOND,
41 SPKnotModeType mode = SP_KNOT_MODE_XOR,
42 guint32 color = 0xffffff00);
44 /* derived classes like PointParam for LPEs use this, e.g., to indicate that we must not call
45 delete on their pointer when a knotholder is destroyed */
46 virtual bool isLPEParam() { return false; }
48 /* the get/set/click handlers are virtual functions; each handler class for a knot
49 should be derived from KnotHolderEntity and override these functions */
50 virtual void knot_set(NR::Point const &p, NR::Point const &origin, guint state) = 0;
51 virtual NR::Point knot_get() = 0;
52 virtual void knot_click(guint /*state*/) {}
53 virtual void onKnotUngrabbed() {}
55 void update_knot();
57 //private:
58 SPKnot *knot;
59 SPItem *item;
61 KnotHolder *parent_holder;
63 int my_counter;
64 static int counter;
66 /** Connection to \a knot's "moved" signal. */
67 guint handler_id;
68 /** Connection to \a knot's "clicked" signal. */
69 guint _click_handler_id;
70 /** Connection to \a knot's "ungrabbed" signal. */
71 guint _ungrab_handler_id;
73 sigc::connection _moved_connection;
74 sigc::connection _click_connection;
75 sigc::connection _ungrabbed_connection;
76 };
78 /* pattern manipulation */
80 class PatternKnotHolderEntityXY : public KnotHolderEntity {
81 public:
82 virtual NR::Point knot_get();
83 virtual void knot_set(NR::Point const &p, NR::Point const &origin, guint state);
84 };
86 class PatternKnotHolderEntityAngle : public KnotHolderEntity {
87 public:
88 virtual NR::Point knot_get();
89 virtual void knot_set(NR::Point const &p, NR::Point const &origin, guint state);
90 };
92 class PatternKnotHolderEntityScale : public KnotHolderEntity {
93 public:
94 virtual NR::Point knot_get();
95 virtual void knot_set(NR::Point const &p, NR::Point const &origin, guint state);
96 };
98 #endif /* !SEEN_KNOT_HOLDER_ENTITY_H */
100 /*
101 Local Variables:
102 mode:c++
103 c-file-style:"stroustrup"
104 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
105 indent-tabs-mode:nil
106 fill-column:99
107 End:
108 */
109 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :