1 /*
2 * Container for SPKnot visual handles
3 *
4 * Authors:
5 * Mitsuru Oka <oka326@parkcity.ne.jp>
6 * bulia byak <buliabyak@users.sf.net>
7 * Maximilian Albert <maximilian.albert@gmail.com>
8 * Abhishek Sharma
9 *
10 * Copyright (C) 2001-2008 authors
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #include <glibmm/i18n.h>
17 #include "document.h"
18 #include "sp-shape.h"
19 #include "knot.h"
20 #include "knotholder.h"
21 #include "rect-context.h"
22 #include "sp-rect.h"
23 #include "arc-context.h"
24 #include "sp-ellipse.h"
25 #include "star-context.h"
26 #include "sp-star.h"
27 #include "spiral-context.h"
28 #include "sp-spiral.h"
29 #include "sp-offset.h"
30 #include "box3d.h"
31 #include "sp-pattern.h"
32 #include "style.h"
33 #include "live_effects/lpeobject.h"
34 #include "live_effects/effect.h"
35 #include "desktop.h"
36 #include "display/sp-canvas.h"
38 #include "xml/repr.h" // for debugging only
40 using Inkscape::DocumentUndo;
42 class SPDesktop;
44 KnotHolder::KnotHolder(SPDesktop *desktop, SPItem *item, SPKnotHolderReleasedFunc relhandler)
45 {
46 //XML Tree being used directly here while it shouldn't be...
47 Inkscape::XML::Node *repr = SP_OBJECT(item)->getRepr();
49 if (!desktop || !item || !SP_IS_ITEM(item)) {
50 g_print ("Error! Throw an exception, please!\n");
51 }
53 this->desktop = desktop;
54 this->item = item;
55 g_object_ref(G_OBJECT(item)); // TODO: is this still needed after C++-ification?
57 this->released = relhandler;
59 this->repr = repr;
60 this->local_change = FALSE;
62 this->dragging = false;
63 }
65 KnotHolder::~KnotHolder() {
66 g_object_unref(G_OBJECT(item));
67 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
68 KnotHolderEntity* e = (*i);
69 if (e->isDeletable()) {
70 delete (*i);
71 } else {
72 // we must not delete the entity (since it's attached to an LPE parameter),
73 // but the handle should be destroyed
74 g_object_unref(e->knot);
75 }
76 (*i) = NULL;
77 }
78 entity.clear(); // is this necessary?
79 }
81 /**
82 * \param p In desktop coordinates.
83 */
85 void
86 KnotHolder::update_knots()
87 {
88 Geom::Matrix const i2d(item->i2d_affine());
90 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
91 KnotHolderEntity *e = *i;
92 e->update_knot();
93 }
94 }
96 /**
97 * \brief Returns true if at least one of the KnotHolderEntities has the mouse hovering above it
98 */
99 bool KnotHolder::knot_mouseover()
100 {
101 for(std::list<KnotHolderEntity *>::iterator i = entity.begin(); i != entity.end(); ++i) {
102 SPKnot *knot = (*i)->knot;
103 if (knot && (knot->flags & SP_KNOT_MOUSEOVER)) {
104 return true;
105 }
106 }
108 return false;
109 }
111 void
112 KnotHolder::knot_clicked_handler(SPKnot *knot, guint state)
113 {
114 KnotHolder *knot_holder = this;
116 for(std::list<KnotHolderEntity *>::iterator i = knot_holder->entity.begin(); i != knot_holder->entity.end(); ++i) {
117 KnotHolderEntity *e = *i;
118 if (e->knot == knot) {
119 // no need to test whether knot_click exists since it's virtual now
120 e->knot_click(state);
121 break;
122 }
123 }
125 if (SP_IS_SHAPE(item)) {
126 SP_SHAPE(item)->setShape();
127 }
129 knot_holder->update_knots();
131 unsigned int object_verb = SP_VERB_NONE;
133 if (SP_IS_RECT(item))
134 object_verb = SP_VERB_CONTEXT_RECT;
135 else if (SP_IS_BOX3D(item))
136 object_verb = SP_VERB_CONTEXT_3DBOX;
137 else if (SP_IS_GENERICELLIPSE(item))
138 object_verb = SP_VERB_CONTEXT_ARC;
139 else if (SP_IS_STAR(item))
140 object_verb = SP_VERB_CONTEXT_STAR;
141 else if (SP_IS_SPIRAL(item))
142 object_verb = SP_VERB_CONTEXT_SPIRAL;
143 else if (SP_IS_OFFSET(item)) {
144 if (SP_OFFSET(item)->sourceHref)
145 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
146 else
147 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
148 }
150 // for drag, this is done by ungrabbed_handler, but for click we must do it here
151 DocumentUndo::done(SP_OBJECT_DOCUMENT(item), object_verb,
152 _("Change handle"));
153 }
155 void
156 KnotHolder::knot_moved_handler(SPKnot *knot, Geom::Point const &p, guint state)
157 {
158 if (this->dragging == false) {
159 this->dragging = true;
160 }
162 // this was a local change and the knotholder does not need to be recreated:
163 this->local_change = TRUE;
165 for(std::list<KnotHolderEntity *>::iterator i = this->entity.begin(); i != this->entity.end(); ++i) {
166 KnotHolderEntity *e = *i;
167 if (e->knot == knot) {
168 Geom::Point const q = p * item->i2d_affine().inverse();
169 e->knot_set(q, e->knot->drag_origin * item->i2d_affine().inverse(), state);
170 break;
171 }
172 }
174 if (SP_IS_SHAPE (item)) {
175 SP_SHAPE (item)->setShape();
176 }
178 this->update_knots();
179 }
181 void
182 KnotHolder::knot_ungrabbed_handler(SPKnot */*knot*/)
183 {
184 this->dragging = false;
186 if (this->released) {
187 this->released(this->item);
188 } else {
189 SPObject *object = (SPObject *) this->item;
191 // Caution: this call involves a screen update, which may process events, and as a
192 // result the knotholder may be destructed. So, after the updateRepr, we cannot use any
193 // fields of this knotholder (such as this->item), but only values we have saved beforehand
194 // (such as object).
195 object->updateRepr();
197 /* do cleanup tasks (e.g., for LPE items write the parameter values
198 * that were changed by dragging the handle to SVG)
199 */
200 if (SP_IS_LPE_ITEM(object)) {
201 // This writes all parameters to SVG. Is this sufficiently efficient or should we only
202 // write the ones that were changed?
204 Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(object));
205 if (lpe) {
206 LivePathEffectObject *lpeobj = lpe->getLPEObj();
207 SP_OBJECT(lpeobj)->updateRepr();
208 }
209 }
211 unsigned int object_verb = SP_VERB_NONE;
213 if (SP_IS_RECT(object))
214 object_verb = SP_VERB_CONTEXT_RECT;
215 else if (SP_IS_BOX3D(object))
216 object_verb = SP_VERB_CONTEXT_3DBOX;
217 else if (SP_IS_GENERICELLIPSE(object))
218 object_verb = SP_VERB_CONTEXT_ARC;
219 else if (SP_IS_STAR(object))
220 object_verb = SP_VERB_CONTEXT_STAR;
221 else if (SP_IS_SPIRAL(object))
222 object_verb = SP_VERB_CONTEXT_SPIRAL;
223 else if (SP_IS_OFFSET(object)) {
224 if (SP_OFFSET(object)->sourceHref)
225 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
226 else
227 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
228 }
230 DocumentUndo::done(SP_OBJECT_DOCUMENT (object), object_verb,
231 _("Move handle"));
232 }
233 }
235 void
236 KnotHolder::add(KnotHolderEntity *e)
237 {
238 entity.push_back(e);
239 }
241 void
242 KnotHolder::add_pattern_knotholder()
243 {
244 if ((SP_OBJECT(item)->style->fill.isPaintserver())
245 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
246 {
247 PatternKnotHolderEntityXY *entity_xy = new PatternKnotHolderEntityXY();
248 PatternKnotHolderEntityAngle *entity_angle = new PatternKnotHolderEntityAngle();
249 PatternKnotHolderEntityScale *entity_scale = new PatternKnotHolderEntityScale();
250 entity_xy->create(desktop, item, this,
251 // TRANSLATORS: This refers to the pattern that's inside the object
252 _("<b>Move</b> the pattern fill inside the object"),
253 SP_KNOT_SHAPE_CROSS);
254 entity_scale->create(desktop, item, this,
255 _("<b>Scale</b> the pattern fill; uniformly if with <b>Ctrl</b>"),
256 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR);
257 entity_angle->create(desktop, item, this,
258 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"),
259 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR);
260 entity.push_back(entity_xy);
261 entity.push_back(entity_angle);
262 entity.push_back(entity_scale);
263 }
264 }
266 /*
267 Local Variables:
268 mode:c++
269 c-file-style:"stroustrup"
270 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
271 indent-tabs-mode:nil
272 fill-column:99
273 End:
274 */
275 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :