Code

Merge and cleanup of GSoC C++-ification project.
[inkscape.git] / src / live_effects / parameter / path.cpp
1 /*
2  * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
3  *   Abhishek Sharma
4  *
5  * Released under GNU GPL, read the file 'COPYING' for more information
6  */
8 #include "live_effects/parameter/path.h"
9 #include "live_effects/effect.h"
10 #include "svg/svg.h"
11 #include <2geom/svg-path-parser.h>
12 #include <2geom/sbasis-to-bezier.h>
13 #include <2geom/pathvector.h>
14 #include <2geom/d2.h>
16 #include "ui/widget/point.h"
17 #include "widgets/icon.h"
18 #include <gtk/gtkstock.h>
19 #include "selection-chemistry.h"
20 #include "xml/repr.h"
21 #include "desktop.h"
22 #include "inkscape.h"
23 #include "message-stack.h"
24 #include "verbs.h"
25 #include "document.h"
27 // needed for on-canvas editting:
28 #include "tools-switch.h"
29 #include "shape-editor.h"
30 #include "desktop-handles.h"
31 #include "selection.h"
32 // clipboard support
33 #include "ui/clipboard.h"
34 // required for linking to other paths
35 #include "uri.h"
36 #include "sp-shape.h"
37 #include "sp-text.h"
38 #include "display/curve.h"
40 #include "ui/tool/node-tool.h"
41 #include "ui/tool/multi-path-manipulator.h"
42 #include "ui/tool/shape-record.h"
45 namespace Inkscape {
47 namespace LivePathEffect {
49 PathParam::PathParam( const Glib::ustring& label, const Glib::ustring& tip,
50                       const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
51                       Effect* effect, const gchar * default_value)
52     : Parameter(label, tip, key, wr, effect),
53       changed(true),
54       _pathvector(),
55       _pwd2(),
56       must_recalculate_pwd2(false),
57       href(NULL),
58       ref( (SPObject*)effect->getLPEObj() )
59 {
60     defvalue = g_strdup(default_value);
61     param_readSVGValue(defvalue);
62     oncanvas_editable = true;
64     ref_changed_connection = ref.changedSignal().connect(sigc::mem_fun(*this, &PathParam::ref_changed));
65 }
67 PathParam::~PathParam()
68 {
69     remove_link();
71     g_free(defvalue);
72 }
74 std::vector<Geom::Path> const &
75 PathParam::get_pathvector()
76 {
77     return _pathvector;
78 }
80 Geom::Piecewise<Geom::D2<Geom::SBasis> > const &
81 PathParam::get_pwd2()
82 {
83     ensure_pwd2();
84     return _pwd2;
85 }
87 void
88 PathParam::param_set_default()
89 {
90     param_readSVGValue(defvalue);
91 }
93 void
94 PathParam::param_set_and_write_default()
95 {
96     param_write_to_repr(defvalue);
97 }
99 bool
100 PathParam::param_readSVGValue(const gchar * strvalue)
102     if (strvalue) {
103         _pathvector.clear();
104         remove_link();
105         must_recalculate_pwd2 = true;
107         if (strvalue[0] == '#') {
108             if (href)
109                 g_free(href);
110             href = g_strdup(strvalue);
112             // Now do the attaching, which emits the changed signal.
113             try {
114                 ref.attach(Inkscape::URI(href));
115             } catch (Inkscape::BadURIException &e) {
116                 g_warning("%s", e.what());
117                 ref.detach();
118                 _pathvector = sp_svg_read_pathv(defvalue);
119             }
120         } else {
121             _pathvector = sp_svg_read_pathv(strvalue);
122         }
124         emit_changed();
125         return true;
126     }
128     return false;
131 gchar *
132 PathParam::param_getSVGValue() const
134     if (href) {
135         return href;
136     } else {
137         gchar * svgd = sp_svg_write_path( _pathvector );
138         return svgd;
139     }
142 Gtk::Widget *
143 PathParam::param_newWidget(Gtk::Tooltips * tooltips)
145     Gtk::HBox * _widget = Gtk::manage(new Gtk::HBox());
147     Gtk::Label* pLabel = Gtk::manage(new Gtk::Label(param_label));
148     static_cast<Gtk::HBox*>(_widget)->pack_start(*pLabel, true, true);
149     tooltips->set_tip(*pLabel, param_tooltip);
151     Gtk::Widget*  pIcon = Gtk::manage( sp_icon_get_icon( "tool-node-editor", Inkscape::ICON_SIZE_BUTTON) );
152     Gtk::Button * pButton = Gtk::manage(new Gtk::Button());
153     pButton->set_relief(Gtk::RELIEF_NONE);
154     pIcon->show();
155     pButton->add(*pIcon);
156     pButton->show();
157     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_edit_button_click));
158     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
159     tooltips->set_tip(*pButton, _("Edit on-canvas"));
161     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_COPY, Inkscape::ICON_SIZE_BUTTON) );
162     pButton = Gtk::manage(new Gtk::Button());
163     pButton->set_relief(Gtk::RELIEF_NONE);
164     pIcon->show();
165     pButton->add(*pIcon);
166     pButton->show();
167     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_copy_button_click));
168     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
169     tooltips->set_tip(*pButton, _("Copy path"));
171     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_PASTE, Inkscape::ICON_SIZE_BUTTON) );
172     pButton = Gtk::manage(new Gtk::Button());
173     pButton->set_relief(Gtk::RELIEF_NONE);
174     pIcon->show();
175     pButton->add(*pIcon);
176     pButton->show();
177     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_paste_button_click));
178     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
179     tooltips->set_tip(*pButton, _("Paste path"));
181     pIcon = Gtk::manage( sp_icon_get_icon( "edit-clone", Inkscape::ICON_SIZE_BUTTON) );
182     pButton = Gtk::manage(new Gtk::Button());
183     pButton->set_relief(Gtk::RELIEF_NONE);
184     pIcon->show();
185     pButton->add(*pIcon);
186     pButton->show();
187     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_link_button_click));
188     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
189     tooltips->set_tip(*pButton, _("Link to path"));
191     static_cast<Gtk::HBox*>(_widget)->show_all_children();
193     return dynamic_cast<Gtk::Widget *> (_widget);
196 void
197 PathParam::param_editOncanvas(SPItem *item, SPDesktop * dt)
199     using namespace Inkscape::UI;
201     // TODO remove the tools_switch atrocity.
202     if (!tools_isactive(dt, TOOLS_NODES)) {
203         tools_switch(dt, TOOLS_NODES);
204     }
206     InkNodeTool *nt = static_cast<InkNodeTool*>(dt->event_context);
207     std::set<ShapeRecord> shapes;
208     ShapeRecord r;
210     r.role = SHAPE_ROLE_LPE_PARAM;
211     r.edit_transform = item->i2d_affine(); // TODO is it right?
212     if (!href) {
213         r.item = reinterpret_cast<SPItem*>(param_effect->getLPEObj());
214         r.lpe_key = param_key;
215     } else {
216         r.item = ref.getObject();
217     }
218     shapes.insert(r);
219     nt->_multipath->setItems(shapes);
222 void
223 PathParam::param_setup_nodepath(Inkscape::NodePath::Path *)
225     // TODO this method should not exist at all!
228 void
229 PathParam::addCanvasIndicators(SPLPEItem */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)
231     hp_vec.push_back(_pathvector);
234 /*
235  * Only applies transform when not referring to other path!
236  */
237 void
238 PathParam::param_transform_multiply(Geom::Matrix const& postmul, bool /*set*/)
240     // only apply transform when not referring to other path
241     if (!href) {
242         set_new_value( _pathvector * postmul, true );
243     }
246 /*
247  * See comments for set_new_value(std::vector<Geom::Path>).
248  */
249 void
250 PathParam::set_new_value (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & newpath, bool write_to_svg)
252     remove_link();
253     _pathvector = Geom::path_from_piecewise(newpath, LPE_CONVERSION_TOLERANCE);
255     if (write_to_svg) {
256         gchar * svgd = sp_svg_write_path( _pathvector );
257         param_write_to_repr(svgd);
258         g_free(svgd);
260         // After the whole "writing to svg avalanche of function calling": force value upon pwd2 and don't recalculate.
261         _pwd2 = newpath;
262         must_recalculate_pwd2 = false;
263     } else {
264         _pwd2 = newpath;
265         must_recalculate_pwd2 = false;
266         emit_changed();
267     }
270 /*
271  * This method sets new path data.
272  * If this PathParam refers to another path, this link is removed (and replaced with explicit path data).
273  *
274  * If write_to_svg = true :
275  *          The new path data is written to SVG. In this case the signal_path_changed signal
276  *          is not directly emited in this method, because writing to SVG
277  *          triggers the LPEObject to which this belongs to call Effect::setParameter which calls
278  *          PathParam::readSVGValue, which finally emits the signal_path_changed signal.
279  * If write_to_svg = false :
280  *          The new path data is not written to SVG. This method will emit the signal_path_changed signal.
281  */
282 void
283 PathParam::set_new_value (std::vector<Geom::Path> const &newpath, bool write_to_svg)
285     remove_link();
286     _pathvector = newpath;
287     must_recalculate_pwd2 = true;
289     if (write_to_svg) {
290         gchar * svgd = sp_svg_write_path( _pathvector );
291         param_write_to_repr(svgd);
292         g_free(svgd);
293     } else {
294         emit_changed();
295     }
298 void
299 PathParam::ensure_pwd2()
301     if (must_recalculate_pwd2) {
302         _pwd2.clear();
303         for (unsigned int i=0; i < _pathvector.size(); i++) {
304             _pwd2.concat( _pathvector[i].toPwSb() );
305         }
307         must_recalculate_pwd2 = false;
308     }
311 void
312 PathParam::emit_changed()
314     changed = true;
315     signal_path_changed.emit();
318 void
319 PathParam::start_listening(SPObject * to)
321     if ( to == NULL ) {
322         return;
323     }
324     linked_delete_connection = to->connectDelete(sigc::mem_fun(*this, &PathParam::linked_delete));
325     linked_modified_connection = to->connectModified(sigc::mem_fun(*this, &PathParam::linked_modified));
326     linked_modified(to, SP_OBJECT_MODIFIED_FLAG); // simulate linked_modified signal, so that path data is updated
329 void
330 PathParam::quit_listening(void)
332     linked_modified_connection.disconnect();
333     linked_delete_connection.disconnect();
336 void
337 PathParam::ref_changed(SPObject */*old_ref*/, SPObject *new_ref)
339     quit_listening();
340     if ( new_ref ) {
341         start_listening(new_ref);
342     }
345 void
346 PathParam::remove_link()
348     if (href) {
349         ref.detach();
350         g_free(href);
351         href = NULL;
352     }
355 void
356 PathParam::linked_delete(SPObject */*deleted*/)
358     quit_listening();
359     remove_link();
360     set_new_value (_pathvector, true);
363 void
364 PathParam::linked_modified(SPObject *linked_obj, guint /*flags*/)
366     SPCurve *curve = NULL;
367     if (SP_IS_SHAPE(linked_obj)) {
368         curve = SP_SHAPE(linked_obj)->getCurve();
369     }
370     if (SP_IS_TEXT(linked_obj)) {
371         curve = SP_TEXT(linked_obj)->getNormalizedBpath();
372     }
374     if (curve == NULL) {
375         // curve invalid, set default value
376         _pathvector = sp_svg_read_pathv(defvalue);
377     } else {
378         _pathvector = curve->get_pathvector();
379         curve->unref();
380     }
382     must_recalculate_pwd2 = true;
383     emit_changed();
384     SP_OBJECT(param_effect->getLPEObj())->requestModified(SP_OBJECT_MODIFIED_FLAG);
387 /* CALLBACK FUNCTIONS FOR THE BUTTONS */
388 void
389 PathParam::on_edit_button_click()
391     SPItem * item = sp_desktop_selection(SP_ACTIVE_DESKTOP)->singleItem();
392     if (item != NULL) {
393         param_editOncanvas(item, SP_ACTIVE_DESKTOP);
394     }
397 void
398 PathParam::paste_param_path(const char *svgd)
400     // only recognize a non-null, non-empty string
401     if (svgd && *svgd) {
402         // remove possible link to path
403         remove_link();
405         param_write_to_repr(svgd);
406         signal_path_pasted.emit();
407     }
410 void
411 PathParam::on_paste_button_click()
413     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
414     Glib::ustring svgd = cm->getPathParameter(SP_ACTIVE_DESKTOP);
415     paste_param_path(svgd.data());
416     DocumentUndo::done(param_effect->getSPDoc(), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
417                        _("Paste path parameter"));
420 void
421 PathParam::on_copy_button_click()
423     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
424     cm->copyPathParameter(this);
427 void
428 PathParam::on_link_button_click()
430     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
431     Glib::ustring pathid = cm->getShapeOrTextObjectId(SP_ACTIVE_DESKTOP);
433     if (pathid == "") {
434         return;
435     }
437     // add '#' at start to make it an uri.
438     pathid.insert(pathid.begin(), '#');
439     if ( href && strcmp(pathid.c_str(), href) == 0 ) {
440         // no change, do nothing
441         return;
442     } else {
443         // TODO:
444         // check if id really exists in document, or only in clipboard document: if only in clipboard then invalid
445         // check if linking to object to which LPE is applied (maybe delegated to PathReference
447         param_write_to_repr(pathid.c_str());
448         DocumentUndo::done(param_effect->getSPDoc(), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
449                            _("Link path parameter to path"));
450     }
453 } /* namespace LivePathEffect */
455 } /* namespace Inkscape */
457 /*
458   Local Variables:
459   mode:c++
460   c-file-style:"stroustrup"
461   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
462   indent-tabs-mode:nil
463   fill-column:99
464   End:
465 */
466 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :