1 #define __KNOT_HOLDER_C__
3 /*
4 * Container for SPKnot visual handles
5 *
6 * Authors:
7 * Mitsuru Oka <oka326@parkcity.ne.jp>
8 * bulia byak <buliabyak@users.sf.net>
9 *
10 * Copyright (C) 2001-2005 authors
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #define noKNOT_HOLDER_DEBUG
18 #include "document.h"
19 #include "sp-shape.h"
20 #include "knot.h"
21 #include "knotholder.h"
22 #include "knot-holder-entity.h"
23 #include <libnr/nr-matrix-div.h>
25 class SPDesktop;
27 static void knot_clicked_handler (SPKnot *knot, guint state, gpointer data);
28 static void knot_moved_handler(SPKnot *knot, NR::Point const *p, guint state, gpointer data);
29 static void knot_ungrabbed_handler (SPKnot *knot, unsigned int state, SPKnotHolder *kh);
30 static void sp_knot_holder_class_init(SPKnotHolderClass *klass);
32 void sp_knot_holder_dispose(GObject *object);
34 #ifdef KNOT_HOLDER_DEBUG
36 static void sp_knot_holder_debug(GtkObject *object, gpointer data)
37 {
38 g_print("sp-knot-holder-debug: [type=%s] [data=%s]\n", gtk_type_name(GTK_OBJECT_TYPE(object)), (const gchar *) data);
39 }
40 #endif
42 static GObjectClass *parent_class;
44 /**
45 * Registers SPKnotHolder class and returns its type number.
46 */
47 GType sp_knot_holder_get_type()
48 {
49 static GType type = 0;
50 if (!type) {
51 GTypeInfo info = {
52 sizeof(SPKnotHolderClass),
53 NULL, /* base_init */
54 NULL, /* base_finalize */
55 (GClassInitFunc) sp_knot_holder_class_init,
56 NULL, /* class_finalize */
57 NULL, /* class_data */
58 sizeof (SPKnotHolder),
59 16, /* n_preallocs */
60 NULL,
61 NULL
62 };
63 type = g_type_register_static (G_TYPE_OBJECT, "SPKnotHolder", &info, (GTypeFlags) 0);
64 }
65 return type;
66 }
68 /**
69 * SPKnotHolder vtable initialization.
70 */
71 static void sp_knot_holder_class_init(SPKnotHolderClass *klass){
72 parent_class = (GObjectClass*) g_type_class_peek_parent(klass);
73 klass->dispose = sp_knot_holder_dispose;
74 }
76 SPKnotHolder *sp_knot_holder_new(SPDesktop *desktop, SPItem *item, SPKnotHolderReleasedFunc relhandler)
77 {
78 Inkscape::XML::Node *repr = SP_OBJECT(item)->repr;
80 g_return_val_if_fail(desktop != NULL, NULL);
81 g_return_val_if_fail(item != NULL, NULL);
82 g_return_val_if_fail(SP_IS_ITEM(item), NULL);
84 SPKnotHolder *knot_holder = (SPKnotHolder*)g_object_new (SP_TYPE_KNOT_HOLDER, 0);
85 knot_holder->desktop = desktop;
86 knot_holder->item = item;
87 g_object_ref(G_OBJECT(item));
88 knot_holder->entity = NULL;
90 knot_holder->released = relhandler;
92 knot_holder->repr = repr;
93 knot_holder->local_change = FALSE;
95 #ifdef KNOT_HOLDER_DEBUG
96 g_signal_connect(G_OBJECT(desktop), "destroy", sp_knot_holder_debug, (gpointer) "SPKnotHolder::item");
97 #endif
99 return knot_holder;
100 }
102 void sp_knot_holder_dispose(GObject *object) {
103 SPKnotHolder *kh = G_TYPE_CHECK_INSTANCE_CAST((object), SP_TYPE_KNOT_HOLDER, SPKnotHolder);
105 g_object_unref(G_OBJECT(kh->item));
106 while (kh->entity) {
107 SPKnotHolderEntity *e = (SPKnotHolderEntity *) kh->entity->data;
108 g_signal_handler_disconnect(e->knot, e->_click_handler_id);
109 g_signal_handler_disconnect(e->knot, e->_ungrab_handler_id);
110 /* unref should call destroy */
111 g_object_unref(e->knot);
112 g_free(e);
113 kh->entity = g_slist_remove(kh->entity, e);
114 }
115 }
117 void sp_knot_holder_destroy(SPKnotHolder *kh) {
118 g_object_unref(kh);
119 }
121 void sp_knot_holder_add(
122 SPKnotHolder *knot_holder,
123 SPKnotHolderSetFunc knot_set,
124 SPKnotHolderGetFunc knot_get,
125 void (* knot_click) (SPItem *item, guint state),
126 const gchar *tip
127 )
128 {
129 sp_knot_holder_add_full(knot_holder, knot_set, knot_get, knot_click, SP_KNOT_SHAPE_DIAMOND, SP_KNOT_MODE_XOR, tip);
130 }
132 void sp_knot_holder_add_full(
133 SPKnotHolder *knot_holder,
134 SPKnotHolderSetFunc knot_set,
135 SPKnotHolderGetFunc knot_get,
136 void (* knot_click) (SPItem *item, guint state),
137 SPKnotShapeType shape,
138 SPKnotModeType mode,
139 const gchar *tip
140 )
141 {
142 g_return_if_fail(knot_holder != NULL);
143 g_return_if_fail(knot_set != NULL);
144 g_return_if_fail(knot_get != NULL);
146 SPItem *item = SP_ITEM(knot_holder->item);
148 /* create new SPKnotHolderEntry */
149 SPKnotHolderEntity *e = g_new(SPKnotHolderEntity, 1);
150 e->knot = sp_knot_new(knot_holder->desktop, tip);
151 e->knot_set = knot_set;
152 e->knot_get = knot_get;
153 if (knot_click) {
154 e->knot_click = knot_click;
155 } else {
156 e->knot_click = NULL;
157 }
159 g_object_set(G_OBJECT (e->knot->item), "shape", shape, NULL);
160 g_object_set(G_OBJECT (e->knot->item), "mode", mode, NULL);
162 // TODO: add a color argument
163 //e->knot->fill [SP_KNOT_STATE_NORMAL] = 0x00ff0000;
164 //g_object_set (G_OBJECT (e->knot->item), "fill_color", 0x00ff0000, NULL);
166 knot_holder->entity = g_slist_append(knot_holder->entity, e);
168 /* Move to current point. */
169 NR::Point dp = e->knot_get(item) * sp_item_i2d_affine(item);
170 sp_knot_set_position(e->knot, &dp, SP_KNOT_STATE_NORMAL);
172 e->handler_id = g_signal_connect(e->knot, "moved", G_CALLBACK(knot_moved_handler), knot_holder);
173 e->_click_handler_id = g_signal_connect(e->knot, "clicked", G_CALLBACK(knot_clicked_handler), knot_holder);
174 e->_ungrab_handler_id = g_signal_connect(e->knot, "ungrabbed", G_CALLBACK(knot_ungrabbed_handler), knot_holder);
176 #ifdef KNOT_HOLDER_DEBUG
177 g_signal_connect(ob, "destroy", sp_knot_holder_debug, "SPKnotHolder::knot");
178 #endif
179 sp_knot_show(e->knot);
180 }
182 /**
183 * \param p In desktop coordinates.
184 */
186 static void knotholder_update_knots(SPKnotHolder *knot_holder, SPItem *item)
187 {
188 NR::Matrix const i2d(sp_item_i2d_affine(item));
190 for (GSList *el = knot_holder->entity; el; el = el->next) {
191 SPKnotHolderEntity *e = (SPKnotHolderEntity *) el->data;
192 GObject *kob = e->knot;
194 NR::Point dp( e->knot_get(item) * i2d );
195 g_signal_handler_block(kob, e->handler_id);
196 sp_knot_set_position(e->knot, &dp, SP_KNOT_STATE_NORMAL);
197 g_signal_handler_unblock(kob, e->handler_id);
198 }
199 }
201 static void knot_clicked_handler(SPKnot *knot, guint state, gpointer data)
202 {
203 SPKnotHolder *knot_holder = (SPKnotHolder *) data;
204 SPItem *item = SP_ITEM (knot_holder->item);
206 g_object_ref(knot_holder);
207 for (GSList *el = knot_holder->entity; el; el = el->next) {
208 SPKnotHolderEntity *e = (SPKnotHolderEntity *) el->data;
209 if (e->knot == knot) {
210 if (e->knot_click) {
211 e->knot_click(item, state);
212 }
213 break;
214 }
215 }
217 if (SP_IS_SHAPE(item)) {
218 sp_shape_set_shape(SP_SHAPE(item));
219 }
221 knotholder_update_knots(knot_holder, item);
222 g_object_unref(knot_holder);
224 // for drag, this is done by ungrabbed_handler, but for click we must do it here
225 sp_document_done(SP_OBJECT_DOCUMENT(knot_holder->item));
226 }
228 static void knot_moved_handler(SPKnot *knot, NR::Point const *p, guint state, gpointer data)
229 {
230 SPKnotHolder *knot_holder = (SPKnotHolder *) data;
231 SPItem *item = SP_ITEM (knot_holder->item);
232 // this was a local change and the knotholder does not need to be recreated:
233 knot_holder->local_change = TRUE;
235 for (GSList *el = knot_holder->entity; el; el = el->next) {
236 SPKnotHolderEntity *e = (SPKnotHolderEntity *) el->data;
237 if (e->knot == knot) {
238 NR::Point const q = *p / sp_item_i2d_affine(item);
239 e->knot_set(item, q, e->knot->drag_origin / sp_item_i2d_affine(item), state);
240 break;
241 }
242 }
244 if (SP_IS_SHAPE (item)) {
245 sp_shape_set_shape(SP_SHAPE (item));
246 }
248 knotholder_update_knots(knot_holder, item);
249 }
251 static void knot_ungrabbed_handler(SPKnot *knot, unsigned int state, SPKnotHolder *kh)
252 {
253 if (kh->released) {
254 kh->released(kh->item);
255 } else {
256 SPObject *object = (SPObject *) kh->item;
257 object->updateRepr(object->repr, SP_OBJECT_WRITE_EXT);
258 sp_document_done(SP_OBJECT_DOCUMENT (object));
259 }
260 }
262 /*
263 Local Variables:
264 mode:c++
265 c-file-style:"stroustrup"
266 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
267 indent-tabs-mode:nil
268 fill-column:99
269 End:
270 */
271 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :