1 #ifndef __SP_KNOT_H__
2 #define __SP_KNOT_H__
4 /** \file
5 * Declarations for SPKnot: Desktop-bound visual control object.
6 */
7 /*
8 * Authors:
9 * Lauris Kaplinski <lauris@kaplinski.com>
10 *
11 * Copyright (C) 1999-2002 authors
12 * Copyright (C) 2001-2002 Ximian, Inc.
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include <gdk/gdk.h>
18 #include <gtk/gtkenums.h>
19 #include "display/display-forward.h"
20 #include "forward.h"
21 #include <2geom/point.h>
22 #include "knot-enums.h"
23 #include <sigc++/sigc++.h>
25 class SPKnot;
26 class SPKnotClass;
28 #define SP_TYPE_KNOT (sp_knot_get_type())
29 #define SP_KNOT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), SP_TYPE_KNOT, SPKnot))
30 #define SP_KNOT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), SP_TYPE_KNOT, SPKnotClass))
31 #define SP_IS_KNOT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), SP_TYPE_KNOT))
32 #define SP_IS_KNOT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), SP_TYPE_KNOT))
34 /**
35 * Desktop-bound visual control object.
36 *
37 * A knot is a draggable object, with callbacks to change something by
38 * dragging it, visuably represented by a canvas item (mostly square).
39 */
40 struct SPKnot : GObject {
41 SPDesktop *desktop; /**< Desktop we are on. */
42 SPCanvasItem *item; /**< Our CanvasItem. */
43 guint flags;
45 guint size; /**< Always square. */
46 Geom::Point pos; /**< Our desktop coordinates. */
47 Geom::Point grabbed_rel_pos; /**< Grabbed relative position. */
48 Geom::Point drag_origin; /**< Origin of drag. */
49 GtkAnchorType anchor; /**< Anchor. */
51 SPKnotShapeType shape; /**< Shape type. */
52 SPKnotModeType mode;
54 guint32 fill[SP_KNOT_VISIBLE_STATES];
55 guint32 stroke[SP_KNOT_VISIBLE_STATES];
56 guchar *image[SP_KNOT_VISIBLE_STATES];
58 GdkCursor *cursor[SP_KNOT_VISIBLE_STATES];
60 GdkCursor *saved_cursor;
61 gpointer pixbuf;
63 gchar *tip;
65 gulong _event_handler_id;
67 double pressure; /**< The tablet pen pressure when the knot is being dragged. */
69 // C++ signals
70 /**
71 sigc::signal<void, Geom::Point const &, Geom::Point const &, guint> _moved_signal;
72 sigc::signal<void, guint> _click_signal;
73 sigc::signal<Geom::Point> _ungrabbed_signal;
74 **/
75 sigc::signal<void, SPKnot *, Geom::Point const &, guint> _moved_signal;
76 sigc::signal<void, SPKnot *, guint> _click_signal;
77 sigc::signal<void, SPKnot *> _ungrabbed_signal;
79 //TODO: all the members above should eventualle become private, accessible via setters/getters
80 inline void setSize (guint i) {size = i;}
81 inline void setShape (guint i) {shape = (SPKnotShapeType) i;}
82 inline void setAnchor (guint i) {anchor = (GtkAnchorType) i;}
83 inline void setMode (guint i) {mode = (SPKnotModeType) i;}
84 inline void setPixbuf (gpointer p) {pixbuf = p;}
85 inline void setFill (guint32 normal, guint32 mouseover, guint32 dragging) {
86 fill[SP_KNOT_STATE_NORMAL] = normal;
87 fill[SP_KNOT_STATE_MOUSEOVER] = mouseover;
88 fill[SP_KNOT_STATE_DRAGGING] = dragging;
89 }
90 inline void setStroke (guint32 normal, guint32 mouseover, guint32 dragging) {
91 stroke[SP_KNOT_STATE_NORMAL] = normal;
92 stroke[SP_KNOT_STATE_MOUSEOVER] = mouseover;
93 stroke[SP_KNOT_STATE_DRAGGING] = dragging;
94 }
95 inline void setImage (guchar* normal, guchar* mouseover, guchar* dragging) {
96 image[SP_KNOT_STATE_NORMAL] = normal;
97 image[SP_KNOT_STATE_MOUSEOVER] = mouseover;
98 image[SP_KNOT_STATE_DRAGGING] = dragging;
99 }
100 inline void setCursor (GdkCursor* normal, GdkCursor* mouseover, GdkCursor* dragging) {
101 if (cursor[SP_KNOT_STATE_NORMAL]) {
102 gdk_cursor_unref(cursor[SP_KNOT_STATE_NORMAL]);
103 }
104 cursor[SP_KNOT_STATE_NORMAL] = normal;
105 if (normal) {
106 gdk_cursor_ref(normal);
107 }
109 if (cursor[SP_KNOT_STATE_MOUSEOVER]) {
110 gdk_cursor_unref(cursor[SP_KNOT_STATE_MOUSEOVER]);
111 }
112 cursor[SP_KNOT_STATE_MOUSEOVER] = mouseover;
113 if (mouseover) {
114 gdk_cursor_ref(mouseover);
115 }
117 if (cursor[SP_KNOT_STATE_DRAGGING]) {
118 gdk_cursor_unref(cursor[SP_KNOT_STATE_DRAGGING]);
119 }
120 cursor[SP_KNOT_STATE_DRAGGING] = dragging;
121 if (dragging) {
122 gdk_cursor_ref(dragging);
123 }
124 }
126 };
128 /// The SPKnot vtable.
129 struct SPKnotClass {
130 GObjectClass parent_class;
131 gint (* event) (SPKnot *knot, GdkEvent *event);
133 /*
134 * These are unconditional.
135 */
137 void (* clicked) (SPKnot *knot, guint state);
138 void (* doubleclicked) (SPKnot *knot, guint state);
139 void (* grabbed) (SPKnot *knot, guint state);
140 void (* ungrabbed) (SPKnot *knot, guint state);
141 void (* moved) (SPKnot *knot, Geom::Point const &position, guint state);
142 void (* stamped) (SPKnot *know, guint state);
144 /** Request knot to move to absolute position. */
145 bool (* request) (SPKnot *knot, Geom::Point const &pos, guint state);
147 /** Find complex distance from knot to point. */
148 gdouble (* distance) (SPKnot *knot, Geom::Point const &pos, guint state);
149 };
151 GType sp_knot_get_type();
153 SPKnot *sp_knot_new(SPDesktop *desktop, gchar const *tip = NULL);
155 #define SP_KNOT_IS_VISIBLE(k) ((k->flags & SP_KNOT_VISIBLE) != 0)
156 #define SP_KNOT_IS_MOUSEOVER(k) ((k->flags & SP_KNOT_MOUSEOVER) != 0)
157 #define SP_KNOT_IS_DRAGGING(k) ((k->flags & SP_KNOT_DRAGGING) != 0)
158 #define SP_KNOT_IS_GRABBED(k) ((k->flags & SP_KNOT_GRABBED) != 0)
160 void sp_knot_show(SPKnot *knot);
161 void sp_knot_hide(SPKnot *knot);
163 void sp_knot_set_flag(SPKnot *knot, guint flag, bool set);
164 void sp_knot_update_ctrl(SPKnot *knot);
166 void sp_knot_request_position(SPKnot *knot, Geom::Point const &pos, guint state);
167 gdouble sp_knot_distance(SPKnot *knot, Geom::Point const &p, guint state);
169 void sp_knot_start_dragging(SPKnot *knot, Geom::Point const &p, gint x, gint y, guint32 etime);
171 /** Moves knot and emits "moved" signal. */
172 void sp_knot_set_position(SPKnot *knot, Geom::Point const &p, guint state);
174 /** Moves knot without any signal. */
175 void sp_knot_moveto(SPKnot *knot, Geom::Point const &p);
177 void sp_knot_handler_request_position(GdkEvent *event, SPKnot *knot);
178 Geom::Point sp_knot_position(SPKnot const *knot);
181 #endif /* !__SP_KNOT_H__ */
183 /*
184 Local Variables:
185 mode:c++
186 c-file-style:"stroustrup"
187 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
188 indent-tabs-mode:nil
189 fill-column:99
190 End:
191 */
192 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :