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 <glibmm/i18n.h>
38 class SPDesktop;
40 KnotHolder::KnotHolder(SPDesktop *desktop, SPItem *item, SPKnotHolderReleasedFunc relhandler)
41 {
42 Inkscape::XML::Node *repr = SP_OBJECT(item)->repr;
44 if (!desktop || !item || !SP_IS_ITEM(item)) {
45 g_print ("Error! Throw an exception, please!\n");
46 }
48 this->desktop = desktop;
49 this->item = item;
50 g_object_ref(G_OBJECT(item)); // TODO: is this still needed after C++-ification?
52 this->released = relhandler;
54 this->repr = repr;
55 this->local_change = FALSE;
56 }
58 KnotHolder::~KnotHolder() {
59 g_object_unref(G_OBJECT(item));
60 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
61 KnotHolderEntity* e = (*i);
62 if (e->isDeletable()) {
63 delete (*i);
64 } else {
65 // we must not delete the entity (since it's attached to an LPE parameter),
66 // but the handle should be destroyed
67 g_object_unref(e->knot);
68 }
69 (*i) = NULL;
70 }
71 entity.clear(); // is this necessary?
72 }
74 /**
75 * \param p In desktop coordinates.
76 */
78 void
79 KnotHolder::update_knots()
80 {
81 Geom::Matrix const i2d(sp_item_i2d_affine(item));
83 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
84 KnotHolderEntity *e = *i;
85 e->update_knot();
86 }
87 }
89 void
90 KnotHolder::knot_clicked_handler(SPKnot *knot, guint state)
91 {
92 KnotHolder *knot_holder = this;
94 for(std::list<KnotHolderEntity *>::iterator i = knot_holder->entity.begin(); i != knot_holder->entity.end(); ++i) {
95 KnotHolderEntity *e = *i;
96 if (e->knot == knot) {
97 // no need to test whether knot_click exists since it's virtual now
98 e->knot_click(state);
99 break;
100 }
101 }
103 if (SP_IS_SHAPE(item)) {
104 sp_shape_set_shape(SP_SHAPE(item));
105 }
107 knot_holder->update_knots();
109 unsigned int object_verb = SP_VERB_NONE;
111 if (SP_IS_RECT(item))
112 object_verb = SP_VERB_CONTEXT_RECT;
113 else if (SP_IS_BOX3D(item))
114 object_verb = SP_VERB_CONTEXT_3DBOX;
115 else if (SP_IS_GENERICELLIPSE(item))
116 object_verb = SP_VERB_CONTEXT_ARC;
117 else if (SP_IS_STAR(item))
118 object_verb = SP_VERB_CONTEXT_STAR;
119 else if (SP_IS_SPIRAL(item))
120 object_verb = SP_VERB_CONTEXT_SPIRAL;
121 else if (SP_IS_OFFSET(item)) {
122 if (SP_OFFSET(item)->sourceHref)
123 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
124 else
125 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
126 }
128 // for drag, this is done by ungrabbed_handler, but for click we must do it here
129 sp_document_done(SP_OBJECT_DOCUMENT(item), object_verb,
130 _("Change handle"));
131 }
133 void
134 KnotHolder::knot_moved_handler(SPKnot *knot, Geom::Point const &p, guint state)
135 {
136 // this was a local change and the knotholder does not need to be recreated:
137 this->local_change = TRUE;
139 for(std::list<KnotHolderEntity *>::iterator i = this->entity.begin(); i != this->entity.end(); ++i) {
140 KnotHolderEntity *e = *i;
141 if (e->knot == knot) {
142 Geom::Point const q = p * sp_item_i2d_affine(item).inverse();
143 e->knot_set(q, e->knot->drag_origin * sp_item_i2d_affine(item).inverse(), state);
144 break;
145 }
146 }
148 if (SP_IS_SHAPE (item)) {
149 sp_shape_set_shape(SP_SHAPE (item));
150 }
152 this->update_knots();
153 }
155 void
156 KnotHolder::knot_ungrabbed_handler(SPKnot */*knot*/)
157 {
158 if (this->released) {
159 this->released(this->item);
160 } else {
161 SPObject *object = (SPObject *) this->item;
163 // Caution: this call involves a screen update, which may process events, and as a
164 // result the knotholder may be destructed. So, after the updateRepr, we cannot use any
165 // fields of this knotholder (such as this->item), but only values we have saved beforehand
166 // (such as object).
167 object->updateRepr();
169 /* do cleanup tasks (e.g., for LPE items write the parameter values
170 * that were changed by dragging the handle to SVG)
171 */
172 if (SP_IS_LPE_ITEM(object)) {
173 // This writes all parameters to SVG. Is this sufficiently efficient or should we only
174 // write the ones that were changed?
176 Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(object));
177 if (lpe) {
178 LivePathEffectObject *lpeobj = lpe->getLPEObj();
179 SP_OBJECT(lpeobj)->updateRepr();
180 }
181 }
183 unsigned int object_verb = SP_VERB_NONE;
185 if (SP_IS_RECT(object))
186 object_verb = SP_VERB_CONTEXT_RECT;
187 else if (SP_IS_BOX3D(object))
188 object_verb = SP_VERB_CONTEXT_3DBOX;
189 else if (SP_IS_GENERICELLIPSE(object))
190 object_verb = SP_VERB_CONTEXT_ARC;
191 else if (SP_IS_STAR(object))
192 object_verb = SP_VERB_CONTEXT_STAR;
193 else if (SP_IS_SPIRAL(object))
194 object_verb = SP_VERB_CONTEXT_SPIRAL;
195 else if (SP_IS_OFFSET(object)) {
196 if (SP_OFFSET(object)->sourceHref)
197 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
198 else
199 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
200 }
202 sp_document_done(SP_OBJECT_DOCUMENT (object), object_verb,
203 _("Move handle"));
204 }
205 }
207 void
208 KnotHolder::add(KnotHolderEntity *e)
209 {
210 entity.push_back(e);
211 }
213 void
214 KnotHolder::add_pattern_knotholder()
215 {
216 if ((SP_OBJECT(item)->style->fill.isPaintserver())
217 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
218 {
219 PatternKnotHolderEntityXY *entity_xy = new PatternKnotHolderEntityXY();
220 PatternKnotHolderEntityAngle *entity_angle = new PatternKnotHolderEntityAngle();
221 PatternKnotHolderEntityScale *entity_scale = new PatternKnotHolderEntityScale();
222 entity_xy->create(desktop, item, this,
223 // TRANSLATORS: This refers to the pattern that's inside the object
224 _("<b>Move</b> the pattern fill inside the object"),
225 SP_KNOT_SHAPE_CROSS);
226 entity_scale->create(desktop, item, this,
227 _("<b>Scale</b> the pattern fill uniformly"),
228 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR);
229 entity_angle->create(desktop, item, this,
230 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"),
231 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR);
232 entity.push_back(entity_xy);
233 entity.push_back(entity_angle);
234 entity.push_back(entity_scale);
235 }
236 }
238 /*
239 Local Variables:
240 mode:c++
241 c-file-style:"stroustrup"
242 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
243 indent-tabs-mode:nil
244 fill-column:99
245 End:
246 */
247 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :