45cb140c019883787c478e928668a85c73511fd7
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"
33 #include "live_effects/effect.h"
34 #include "desktop.h"
35 #include "display/sp-canvas.h"
37 #include "xml/repr.h" // for debugging only
39 #include <glibmm/i18n.h>
41 class SPDesktop;
43 KnotHolder::KnotHolder(SPDesktop *desktop, SPItem *item, SPKnotHolderReleasedFunc relhandler)
44 {
45 Inkscape::XML::Node *repr = SP_OBJECT(item)->repr;
47 if (!desktop || !item || !SP_IS_ITEM(item)) {
48 g_print ("Error! Throw an exception, please!\n");
49 }
51 this->desktop = desktop;
52 this->item = item;
53 g_object_ref(G_OBJECT(item)); // TODO: is this still needed after C++-ification?
55 this->released = relhandler;
57 this->repr = repr;
58 this->local_change = FALSE;
60 this->dragging = false;
61 }
63 KnotHolder::~KnotHolder() {
64 g_object_unref(G_OBJECT(item));
65 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
66 KnotHolderEntity* e = (*i);
67 if (e->isDeletable()) {
68 delete (*i);
69 } else {
70 // we must not delete the entity (since it's attached to an LPE parameter),
71 // but the handle should be destroyed
72 g_object_unref(e->knot);
73 }
74 (*i) = NULL;
75 }
76 entity.clear(); // is this necessary?
77 }
79 /**
80 * \param p In desktop coordinates.
81 */
83 void
84 KnotHolder::update_knots()
85 {
86 Geom::Matrix const i2d(sp_item_i2d_affine(item));
88 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
89 KnotHolderEntity *e = *i;
90 e->update_knot();
91 }
92 }
94 void
95 KnotHolder::knot_clicked_handler(SPKnot *knot, guint state)
96 {
97 KnotHolder *knot_holder = this;
99 for(std::list<KnotHolderEntity *>::iterator i = knot_holder->entity.begin(); i != knot_holder->entity.end(); ++i) {
100 KnotHolderEntity *e = *i;
101 if (e->knot == knot) {
102 // no need to test whether knot_click exists since it's virtual now
103 e->knot_click(state);
104 break;
105 }
106 }
108 if (SP_IS_SHAPE(item)) {
109 sp_shape_set_shape(SP_SHAPE(item));
110 }
112 knot_holder->update_knots();
114 unsigned int object_verb = SP_VERB_NONE;
116 if (SP_IS_RECT(item))
117 object_verb = SP_VERB_CONTEXT_RECT;
118 else if (SP_IS_BOX3D(item))
119 object_verb = SP_VERB_CONTEXT_3DBOX;
120 else if (SP_IS_GENERICELLIPSE(item))
121 object_verb = SP_VERB_CONTEXT_ARC;
122 else if (SP_IS_STAR(item))
123 object_verb = SP_VERB_CONTEXT_STAR;
124 else if (SP_IS_SPIRAL(item))
125 object_verb = SP_VERB_CONTEXT_SPIRAL;
126 else if (SP_IS_OFFSET(item)) {
127 if (SP_OFFSET(item)->sourceHref)
128 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
129 else
130 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
131 }
133 // for drag, this is done by ungrabbed_handler, but for click we must do it here
134 sp_document_done(SP_OBJECT_DOCUMENT(item), object_verb,
135 _("Change handle"));
136 }
138 void
139 KnotHolder::knot_moved_handler(SPKnot *knot, Geom::Point const &p, guint state)
140 {
141 if (this->dragging == false) {
142 this->dragging = true;
143 }
145 // this was a local change and the knotholder does not need to be recreated:
146 this->local_change = TRUE;
148 for(std::list<KnotHolderEntity *>::iterator i = this->entity.begin(); i != this->entity.end(); ++i) {
149 KnotHolderEntity *e = *i;
150 if (e->knot == knot) {
151 Geom::Point const q = p * sp_item_i2d_affine(item).inverse();
152 e->knot_set(q, e->knot->drag_origin * sp_item_i2d_affine(item).inverse(), state);
153 break;
154 }
155 }
157 if (SP_IS_SHAPE (item)) {
158 sp_shape_set_shape(SP_SHAPE (item));
159 }
161 this->update_knots();
162 }
164 void
165 KnotHolder::knot_ungrabbed_handler(SPKnot */*knot*/)
166 {
167 this->dragging = false;
169 if (this->released) {
170 this->released(this->item);
171 } else {
172 SPObject *object = (SPObject *) this->item;
174 // Caution: this call involves a screen update, which may process events, and as a
175 // result the knotholder may be destructed. So, after the updateRepr, we cannot use any
176 // fields of this knotholder (such as this->item), but only values we have saved beforehand
177 // (such as object).
178 object->updateRepr();
180 /* do cleanup tasks (e.g., for LPE items write the parameter values
181 * that were changed by dragging the handle to SVG)
182 */
183 if (SP_IS_LPE_ITEM(object)) {
184 // This writes all parameters to SVG. Is this sufficiently efficient or should we only
185 // write the ones that were changed?
187 Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(object));
188 if (lpe) {
189 LivePathEffectObject *lpeobj = lpe->getLPEObj();
190 SP_OBJECT(lpeobj)->updateRepr();
191 }
192 }
194 unsigned int object_verb = SP_VERB_NONE;
196 if (SP_IS_RECT(object))
197 object_verb = SP_VERB_CONTEXT_RECT;
198 else if (SP_IS_BOX3D(object))
199 object_verb = SP_VERB_CONTEXT_3DBOX;
200 else if (SP_IS_GENERICELLIPSE(object))
201 object_verb = SP_VERB_CONTEXT_ARC;
202 else if (SP_IS_STAR(object))
203 object_verb = SP_VERB_CONTEXT_STAR;
204 else if (SP_IS_SPIRAL(object))
205 object_verb = SP_VERB_CONTEXT_SPIRAL;
206 else if (SP_IS_OFFSET(object)) {
207 if (SP_OFFSET(object)->sourceHref)
208 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
209 else
210 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
211 }
213 sp_document_done(SP_OBJECT_DOCUMENT (object), object_verb,
214 _("Move handle"));
215 }
216 }
218 void
219 KnotHolder::add(KnotHolderEntity *e)
220 {
221 entity.push_back(e);
222 }
224 void
225 KnotHolder::add_pattern_knotholder()
226 {
227 if ((SP_OBJECT(item)->style->fill.isPaintserver())
228 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
229 {
230 PatternKnotHolderEntityXY *entity_xy = new PatternKnotHolderEntityXY();
231 PatternKnotHolderEntityAngle *entity_angle = new PatternKnotHolderEntityAngle();
232 PatternKnotHolderEntityScale *entity_scale = new PatternKnotHolderEntityScale();
233 entity_xy->create(desktop, item, this,
234 // TRANSLATORS: This refers to the pattern that's inside the object
235 _("<b>Move</b> the pattern fill inside the object"),
236 SP_KNOT_SHAPE_CROSS);
237 entity_scale->create(desktop, item, this,
238 _("<b>Scale</b> the pattern fill; uniformly if with <b>Ctrl</b>"),
239 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR);
240 entity_angle->create(desktop, item, this,
241 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"),
242 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR);
243 entity.push_back(entity_xy);
244 entity.push_back(entity_angle);
245 entity.push_back(entity_scale);
246 }
247 }
249 /*
250 Local Variables:
251 mode:c++
252 c-file-style:"stroustrup"
253 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
254 indent-tabs-mode:nil
255 fill-column:99
256 End:
257 */
258 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :