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A simple layout document as to what, why and how is cppification.
[inkscape.git] / src / live_effects / parameter / path.cpp
1 #define INKSCAPE_LIVEPATHEFFECT_PARAMETER_PATH_CPP
3 /*
4  * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
5  *
6  * Released under GNU GPL, read the file 'COPYING' for more information
7  */
9 #include "live_effects/parameter/path.h"
10 #include "live_effects/effect.h"
11 #include "svg/svg.h"
12 #include <2geom/svg-path-parser.h>
13 #include <2geom/sbasis-to-bezier.h>
14 #include <2geom/pathvector.h>
15 #include <2geom/d2.h>
17 #include "ui/widget/point.h"
18 #include "widgets/icon.h"
19 #include <gtk/gtkstock.h>
20 #include "selection-chemistry.h"
21 #include "xml/repr.h"
22 #include "desktop.h"
23 #include "inkscape.h"
24 #include "message-stack.h"
25 #include "verbs.h"
26 #include "document.h"
28 // needed for on-canvas editting:
29 #include "tools-switch.h"
30 #include "shape-editor.h"
31 #include "desktop-handles.h"
32 #include "selection.h"
33 // clipboard support
34 #include "ui/clipboard.h"
35 // required for linking to other paths
36 #include "uri.h"
37 #include "sp-shape.h"
38 #include "sp-text.h"
39 #include "display/curve.h"
41 #include "ui/tool/node-tool.h"
42 #include "ui/tool/multi-path-manipulator.h"
43 #include "ui/tool/shape-record.h"
46 namespace Inkscape {
48 namespace LivePathEffect {
50 PathParam::PathParam( const Glib::ustring& label, const Glib::ustring& tip,
51                       const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
52                       Effect* effect, const gchar * default_value)
53     : Parameter(label, tip, key, wr, effect),
54       changed(true),
55       _pathvector(),
56       _pwd2(),
57       must_recalculate_pwd2(false),
58       href(NULL),
59       ref( (SPObject*)effect->getLPEObj() )
60 {
61     defvalue = g_strdup(default_value);
62     param_readSVGValue(defvalue);
63     oncanvas_editable = true;
65     ref_changed_connection = ref.changedSignal().connect(sigc::mem_fun(*this, &PathParam::ref_changed));
66 }
68 PathParam::~PathParam()
69 {
70     remove_link();
72     g_free(defvalue);
73 }
75 std::vector<Geom::Path> const &
76 PathParam::get_pathvector()
77 {
78     return _pathvector;
79 }
81 Geom::Piecewise<Geom::D2<Geom::SBasis> > const &
82 PathParam::get_pwd2()
83 {
84     ensure_pwd2();
85     return _pwd2;
86 }
88 void
89 PathParam::param_set_default()
90 {
91     param_readSVGValue(defvalue);
92 }
94 void
95 PathParam::param_set_and_write_default()
96 {
97     param_write_to_repr(defvalue);
98 }
100 bool
101 PathParam::param_readSVGValue(const gchar * strvalue)
103     if (strvalue) {
104         _pathvector.clear();
105         remove_link();
106         must_recalculate_pwd2 = true;
108         if (strvalue[0] == '#') {
109             if (href)
110                 g_free(href);
111             href = g_strdup(strvalue);
113             // Now do the attaching, which emits the changed signal.
114             try {
115                 ref.attach(Inkscape::URI(href));
116             } catch (Inkscape::BadURIException &e) {
117                 g_warning("%s", e.what());
118                 ref.detach();
119                 _pathvector = sp_svg_read_pathv(defvalue);
120             }
121         } else {
122             _pathvector = sp_svg_read_pathv(strvalue);
123         }
125         emit_changed();
126         return true;
127     }
129     return false;
132 gchar *
133 PathParam::param_getSVGValue() const
135     if (href) {
136         return href;
137     } else {
138         gchar * svgd = sp_svg_write_path( _pathvector );
139         return svgd;
140     }
143 Gtk::Widget *
144 PathParam::param_newWidget(Gtk::Tooltips * tooltips)
146     Gtk::HBox * _widget = Gtk::manage(new Gtk::HBox());
148     Gtk::Label* pLabel = Gtk::manage(new Gtk::Label(param_label));
149     static_cast<Gtk::HBox*>(_widget)->pack_start(*pLabel, true, true);
150     tooltips->set_tip(*pLabel, param_tooltip);
152     Gtk::Widget*  pIcon = Gtk::manage( sp_icon_get_icon( "tool-node-editor", Inkscape::ICON_SIZE_BUTTON) );
153     Gtk::Button * pButton = Gtk::manage(new Gtk::Button());
154     pButton->set_relief(Gtk::RELIEF_NONE);
155     pIcon->show();
156     pButton->add(*pIcon);
157     pButton->show();
158     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_edit_button_click));
159     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
160     tooltips->set_tip(*pButton, _("Edit on-canvas"));
162     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_COPY, Inkscape::ICON_SIZE_BUTTON) );
163     pButton = Gtk::manage(new Gtk::Button());
164     pButton->set_relief(Gtk::RELIEF_NONE);
165     pIcon->show();
166     pButton->add(*pIcon);
167     pButton->show();
168     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_copy_button_click));
169     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
170     tooltips->set_tip(*pButton, _("Copy path"));
172     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_PASTE, Inkscape::ICON_SIZE_BUTTON) );
173     pButton = Gtk::manage(new Gtk::Button());
174     pButton->set_relief(Gtk::RELIEF_NONE);
175     pIcon->show();
176     pButton->add(*pIcon);
177     pButton->show();
178     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_paste_button_click));
179     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
180     tooltips->set_tip(*pButton, _("Paste path"));
182     pIcon = Gtk::manage( sp_icon_get_icon( "edit-clone", Inkscape::ICON_SIZE_BUTTON) );
183     pButton = Gtk::manage(new Gtk::Button());
184     pButton->set_relief(Gtk::RELIEF_NONE);
185     pIcon->show();
186     pButton->add(*pIcon);
187     pButton->show();
188     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_link_button_click));
189     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
190     tooltips->set_tip(*pButton, _("Link to path"));
192     static_cast<Gtk::HBox*>(_widget)->show_all_children();
194     return dynamic_cast<Gtk::Widget *> (_widget);
197 void
198 PathParam::param_editOncanvas(SPItem *item, SPDesktop * dt)
200     using namespace Inkscape::UI;
202     // TODO remove the tools_switch atrocity.
203     if (!tools_isactive(dt, TOOLS_NODES)) {
204         tools_switch(dt, TOOLS_NODES);
205     }
207     InkNodeTool *nt = static_cast<InkNodeTool*>(dt->event_context);
208     std::set<ShapeRecord> shapes;
209     ShapeRecord r;
211     r.role = SHAPE_ROLE_LPE_PARAM;
212     r.edit_transform = item->i2d_affine(); // TODO is it right?
213     if (!href) {
214         r.item = reinterpret_cast<SPItem*>(param_effect->getLPEObj());
215         r.lpe_key = param_key;
216     } else {
217         r.item = ref.getObject();
218     }
219     shapes.insert(r);
220     nt->_multipath->setItems(shapes);
223 void
224 PathParam::param_setup_nodepath(Inkscape::NodePath::Path *)
226     // TODO this method should not exist at all!
229 void
230 PathParam::addCanvasIndicators(SPLPEItem */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)
232     hp_vec.push_back(_pathvector);
235 /*
236  * Only applies transform when not referring to other path!
237  */
238 void
239 PathParam::param_transform_multiply(Geom::Matrix const& postmul, bool /*set*/)
241     // only apply transform when not referring to other path
242     if (!href) {
243         set_new_value( _pathvector * postmul, true );
244     }
247 /*
248  * See comments for set_new_value(std::vector<Geom::Path>).
249  */
250 void
251 PathParam::set_new_value (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & newpath, bool write_to_svg)
253     remove_link();
254     _pathvector = Geom::path_from_piecewise(newpath, LPE_CONVERSION_TOLERANCE);
256     if (write_to_svg) {
257         gchar * svgd = sp_svg_write_path( _pathvector );
258         param_write_to_repr(svgd);
259         g_free(svgd);
261         // After the whole "writing to svg avalanche of function calling": force value upon pwd2 and don't recalculate.
262         _pwd2 = newpath;
263         must_recalculate_pwd2 = false;
264     } else {
265         _pwd2 = newpath;
266         must_recalculate_pwd2 = false;
267         emit_changed();
268     }
271 /*
272  * This method sets new path data.
273  * If this PathParam refers to another path, this link is removed (and replaced with explicit path data).
274  *
275  * If write_to_svg = true :
276  *          The new path data is written to SVG. In this case the signal_path_changed signal
277  *          is not directly emited in this method, because writing to SVG
278  *          triggers the LPEObject to which this belongs to call Effect::setParameter which calls
279  *          PathParam::readSVGValue, which finally emits the signal_path_changed signal.
280  * If write_to_svg = false :
281  *          The new path data is not written to SVG. This method will emit the signal_path_changed signal.
282  */
283 void
284 PathParam::set_new_value (std::vector<Geom::Path> const &newpath, bool write_to_svg)
286     remove_link();
287     _pathvector = newpath;
288     must_recalculate_pwd2 = true;
290     if (write_to_svg) {
291         gchar * svgd = sp_svg_write_path( _pathvector );
292         param_write_to_repr(svgd);
293         g_free(svgd);
294     } else {
295         emit_changed();
296     }
299 void
300 PathParam::ensure_pwd2()
302     if (must_recalculate_pwd2) {
303         _pwd2.clear();
304         for (unsigned int i=0; i < _pathvector.size(); i++) {
305             _pwd2.concat( _pathvector[i].toPwSb() );
306         }
308         must_recalculate_pwd2 = false;
309     }
312 void
313 PathParam::emit_changed()
315     changed = true;
316     signal_path_changed.emit();
319 void
320 PathParam::start_listening(SPObject * to)
322     if ( to == NULL ) {
323         return;
324     }
325     linked_delete_connection = to->connectDelete(sigc::mem_fun(*this, &PathParam::linked_delete));
326     linked_modified_connection = to->connectModified(sigc::mem_fun(*this, &PathParam::linked_modified));
327     linked_modified(to, SP_OBJECT_MODIFIED_FLAG); // simulate linked_modified signal, so that path data is updated
330 void
331 PathParam::quit_listening(void)
333     linked_modified_connection.disconnect();
334     linked_delete_connection.disconnect();
337 void
338 PathParam::ref_changed(SPObject */*old_ref*/, SPObject *new_ref)
340     quit_listening();
341     if ( new_ref ) {
342         start_listening(new_ref);
343     }
346 void
347 PathParam::remove_link()
349     if (href) {
350         ref.detach();
351         g_free(href);
352         href = NULL;
353     }
356 void
357 PathParam::linked_delete(SPObject */*deleted*/)
359     quit_listening();
360     remove_link();
361     set_new_value (_pathvector, true);
364 void
365 PathParam::linked_modified(SPObject *linked_obj, guint /*flags*/)
367     SPCurve *curve = NULL;
368     if (SP_IS_SHAPE(linked_obj)) {
369         curve = SP_SHAPE(linked_obj)->getCurve();
370     }
371     if (SP_IS_TEXT(linked_obj)) {
372         curve = SP_TEXT(linked_obj)->getNormalizedBpath();
373     }
375     if (curve == NULL) {
376         // curve invalid, set default value
377         _pathvector = sp_svg_read_pathv(defvalue);
378     } else {
379         _pathvector = curve->get_pathvector();
380         curve->unref();
381     }
383     must_recalculate_pwd2 = true;
384     emit_changed();
385     SP_OBJECT(param_effect->getLPEObj())->requestModified(SP_OBJECT_MODIFIED_FLAG);
388 /* CALLBACK FUNCTIONS FOR THE BUTTONS */
389 void
390 PathParam::on_edit_button_click()
392     SPItem * item = sp_desktop_selection(SP_ACTIVE_DESKTOP)->singleItem();
393     if (item != NULL) {
394         param_editOncanvas(item, SP_ACTIVE_DESKTOP);
395     }
398 void
399 PathParam::paste_param_path(const char *svgd)
401     // only recognize a non-null, non-empty string
402     if (svgd && *svgd) {
403         // remove possible link to path
404         remove_link();
406         param_write_to_repr(svgd);
407         signal_path_pasted.emit();
408     }
411 void
412 PathParam::on_paste_button_click()
414     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
415     Glib::ustring svgd = cm->getPathParameter(SP_ACTIVE_DESKTOP);
416     paste_param_path(svgd.data());
417     SPDocumentUndo::done(param_effect->getSPDoc(), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
418                      _("Paste path parameter"));
421 void
422 PathParam::on_copy_button_click()
424     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
425     cm->copyPathParameter(this);
428 void
429 PathParam::on_link_button_click()
431     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
432     Glib::ustring pathid = cm->getShapeOrTextObjectId(SP_ACTIVE_DESKTOP);
434     if (pathid == "") {
435         return;
436     }
438     // add '#' at start to make it an uri.
439     pathid.insert(pathid.begin(), '#');
440     if ( href && strcmp(pathid.c_str(), href) == 0 ) {
441         // no change, do nothing
442         return;
443     } else {
444         // TODO:
445         // check if id really exists in document, or only in clipboard document: if only in clipboard then invalid
446         // check if linking to object to which LPE is applied (maybe delegated to PathReference
448         param_write_to_repr(pathid.c_str());
449         SPDocumentUndo::done(param_effect->getSPDoc(), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
450                          _("Link path parameter to path"));
451     }
454 } /* namespace LivePathEffect */
456 } /* namespace Inkscape */
458 /*
459   Local Variables:
460   mode:c++
461   c-file-style:"stroustrup"
462   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
463   indent-tabs-mode:nil
464   fill-column:99
465   End:
466 */
467 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :