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 * Maximilian Albert <maximilian.albert@gmail.com>
10 *
11 * Copyright (C) 2001-2008 authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "document.h"
17 #include "sp-shape.h"
18 #include "knot.h"
19 #include "knotholder.h"
20 #include "rect-context.h"
21 #include "sp-rect.h"
22 #include "arc-context.h"
23 #include "sp-ellipse.h"
24 #include "star-context.h"
25 #include "sp-star.h"
26 #include "spiral-context.h"
27 #include "sp-spiral.h"
28 #include "sp-offset.h"
29 #include "box3d.h"
30 #include "sp-pattern.h"
31 #include "style.h"
32 #include "live_effects/lpeobject.h"
34 #include "xml/repr.h" // for debugging only
36 #include <libnr/nr-matrix-div.h>
37 #include <glibmm/i18n.h>
39 class SPDesktop;
41 KnotHolder::KnotHolder(SPDesktop *desktop, SPItem *item, SPKnotHolderReleasedFunc relhandler)
42 {
43 Inkscape::XML::Node *repr = SP_OBJECT(item)->repr;
45 if (!desktop || !item || !SP_IS_ITEM(item)) {
46 g_print ("Error! Throw an exception, please!\n");
47 }
49 this->desktop = desktop;
50 this->item = item;
51 g_object_ref(G_OBJECT(item)); // TODO: is this still needed after C++-ification?
53 this->released = relhandler;
55 this->repr = repr;
56 this->local_change = FALSE;
57 }
59 KnotHolder::~KnotHolder() {
60 g_object_unref(G_OBJECT(item));
61 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
62 KnotHolderEntity* e = (*i);
63 if (e->isDeletable()) {
64 delete (*i);
65 } else {
66 // we must not delete the entity (since it's attached to an LPE parameter),
67 // but the handle should be destroyed
68 g_object_unref(e->knot);
69 }
70 (*i) = NULL;
71 }
72 entity.clear(); // is this necessary?
73 }
75 /**
76 * \param p In desktop coordinates.
77 */
79 void
80 KnotHolder::update_knots()
81 {
82 NR::Matrix const i2d(from_2geom(sp_item_i2d_affine(item)));
84 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
85 KnotHolderEntity *e = *i;
86 e->update_knot();
87 }
88 }
90 void
91 KnotHolder::knot_clicked_handler(SPKnot *knot, guint state)
92 {
93 KnotHolder *knot_holder = this;
95 for(std::list<KnotHolderEntity *>::iterator i = knot_holder->entity.begin(); i != knot_holder->entity.end(); ++i) {
96 KnotHolderEntity *e = *i;
97 if (e->knot == knot) {
98 // no need to test whether knot_click exists since it's virtual now
99 e->knot_click(state);
100 break;
101 }
102 }
104 if (SP_IS_SHAPE(item)) {
105 sp_shape_set_shape(SP_SHAPE(item));
106 }
108 knot_holder->update_knots();
110 unsigned int object_verb = SP_VERB_NONE;
112 if (SP_IS_RECT(item))
113 object_verb = SP_VERB_CONTEXT_RECT;
114 else if (SP_IS_BOX3D(item))
115 object_verb = SP_VERB_CONTEXT_3DBOX;
116 else if (SP_IS_GENERICELLIPSE(item))
117 object_verb = SP_VERB_CONTEXT_ARC;
118 else if (SP_IS_STAR(item))
119 object_verb = SP_VERB_CONTEXT_STAR;
120 else if (SP_IS_SPIRAL(item))
121 object_verb = SP_VERB_CONTEXT_SPIRAL;
122 else if (SP_IS_OFFSET(item)) {
123 if (SP_OFFSET(item)->sourceHref)
124 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
125 else
126 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
127 }
129 // for drag, this is done by ungrabbed_handler, but for click we must do it here
130 sp_document_done(SP_OBJECT_DOCUMENT(item), object_verb,
131 _("Change handle"));
132 }
134 void
135 KnotHolder::knot_moved_handler(SPKnot *knot, NR::Point const *p, guint state)
136 {
137 // this was a local change and the knotholder does not need to be recreated:
138 this->local_change = TRUE;
140 for(std::list<KnotHolderEntity *>::iterator i = this->entity.begin(); i != this->entity.end(); ++i) {
141 KnotHolderEntity *e = *i;
142 if (e->knot == knot) {
143 NR::Point const q = *p / from_2geom(sp_item_i2d_affine(item));
144 e->knot_set(q, e->knot->drag_origin / from_2geom(sp_item_i2d_affine(item)), state);
145 break;
146 }
147 }
149 if (SP_IS_SHAPE (item)) {
150 sp_shape_set_shape(SP_SHAPE (item));
151 }
153 this->update_knots();
154 }
156 void
157 KnotHolder::knot_ungrabbed_handler(SPKnot *knot)
158 {
159 if (this->released) {
160 this->released(this->item);
161 } else {
162 SPObject *object = (SPObject *) this->item;
164 // Caution: this call involves a screen update, which may process events, and as a
165 // result the knotholder may be destructed. So, after the updateRepr, we cannot use any
166 // fields of this knotholder (such as this->item), but only values we have saved beforehand
167 // (such as object).
168 object->updateRepr();
170 /* do cleanup tasks (e.g., for LPE items write the parameter values
171 * that were changed by dragging the handle to SVG)
172 */
173 if (SP_IS_LPE_ITEM(object)) {
174 // This writes all parameters to SVG. Is this sufficiently efficient or should we only
175 // write the ones that were changed?
177 Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(object));
178 if (lpe) {
179 LivePathEffectObject *lpeobj = lpe->getLPEObj();
180 SP_OBJECT(lpeobj)->updateRepr();
181 }
182 }
184 unsigned int object_verb = SP_VERB_NONE;
186 if (SP_IS_RECT(object))
187 object_verb = SP_VERB_CONTEXT_RECT;
188 else if (SP_IS_BOX3D(object))
189 object_verb = SP_VERB_CONTEXT_3DBOX;
190 else if (SP_IS_GENERICELLIPSE(object))
191 object_verb = SP_VERB_CONTEXT_ARC;
192 else if (SP_IS_STAR(object))
193 object_verb = SP_VERB_CONTEXT_STAR;
194 else if (SP_IS_SPIRAL(object))
195 object_verb = SP_VERB_CONTEXT_SPIRAL;
196 else if (SP_IS_OFFSET(object)) {
197 if (SP_OFFSET(object)->sourceHref)
198 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
199 else
200 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
201 }
203 sp_document_done(SP_OBJECT_DOCUMENT (object), object_verb,
204 _("Move handle"));
205 }
206 }
208 void
209 KnotHolder::add(KnotHolderEntity *e)
210 {
211 entity.push_back(e);
212 }
214 void
215 KnotHolder::add_pattern_knotholder()
216 {
217 if ((SP_OBJECT(item)->style->fill.isPaintserver())
218 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
219 {
220 PatternKnotHolderEntityXY *entity_xy = new PatternKnotHolderEntityXY();
221 PatternKnotHolderEntityAngle *entity_angle = new PatternKnotHolderEntityAngle();
222 PatternKnotHolderEntityScale *entity_scale = new PatternKnotHolderEntityScale();
223 entity_xy->create(desktop, item, this,
224 // TRANSLATORS: This refers to the pattern that's inside the object
225 _("<b>Move</b> the pattern fill inside the object"),
226 SP_KNOT_SHAPE_CROSS);
227 entity_scale->create(desktop, item, this,
228 _("<b>Scale</b> the pattern fill uniformly"),
229 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR);
230 entity_angle->create(desktop, item, this,
231 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"),
232 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR);
233 entity.push_back(entity_xy);
234 entity.push_back(entity_angle);
235 entity.push_back(entity_scale);
236 }
237 }
239 /*
240 Local Variables:
241 mode:c++
242 c-file-style:"stroustrup"
243 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
244 indent-tabs-mode:nil
245 fill-column:99
246 End:
247 */
248 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :