src/live_effects/parameter/path.cpp

   1 #define INKSCAPE_LIVEPATHEFFECT_PARAMETER_PATH_CPP
   2
   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  */
   8
   9 #include "live_effects/parameter/path.h"
  10 #include "live_effects/effect.h"
  11 #include "live_effects/n-art-bpath-2geom.h"
  12 #include "svg/svg.h"
  13 #include <2geom/svg-path-parser.h>
  14 #include <2geom/sbasis-to-bezier.h>
  15 #include <2geom/d2.h>
  16
  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"
  27
  28 // needed for on-canvas editting:
  29 #include "tools-switch.h"
  30 #include "shape-editor.h"
  31 #include "node-context.h"
  32 #include "desktop-handles.h"
  33 #include "selection.h"
  34 #include "nodepath.h"
  35 // clipboard support
  36 #include "ui/clipboard.h"
  37
  38 namespace Inkscape {
  39
  40 namespace LivePathEffect {
  41
  42 PathParam::PathParam( const Glib::ustring& label, const Glib::ustring& tip,
  43                       const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
  44                       Effect* effect, const gchar * default_value)
  45     : Parameter(label, tip, key, wr, effect),
  46       _pathvector(),
  47       _pwd2(),
  48       must_recalculate_pwd2(false),
  49       href(NULL)
  50 {
  51     defvalue = g_strdup(default_value);
  52     param_readSVGValue(defvalue);
  53     oncanvas_editable = true;
  54 }
  55
  56 PathParam::~PathParam()
  57 {
  58     g_free(defvalue);
  59 }
  60
  61 std::vector<Geom::Path> const &
  62 PathParam::get_pathvector()
  63 {
  64     return _pathvector;
  65 }
  66
  67 Geom::Piecewise<Geom::D2<Geom::SBasis> > const &
  68 PathParam::get_pwd2()
  69 {
  70     ensure_pwd2();
  71     return _pwd2;
  72 }
  73
  74 void
  75 PathParam::param_set_default()
  76 {
  77     param_readSVGValue(defvalue);
  78 }
  79
  80 void
  81 PathParam::param_set_and_write_default()
  82 {
  83     param_write_to_repr(defvalue);
  84 }
  85
  86 bool
  87 PathParam::param_readSVGValue(const gchar * strvalue)
  88 {
  89     if (strvalue) {
  90         _pathvector.clear();
  91         if (href) {
  92             g_free(href);
  93             href = NULL;
  94         }
  95         must_recalculate_pwd2 = true;
  96
  97         if (false /*if strvalue is xlink*/) {
  98             href = g_strdup(strvalue);
  99             update_from_referred();
 100             // TODO: add listener, because we must update when referred updates. we must always be up-to-date with referred path data
 101         } else {
 102             _pathvector = SVGD_to_2GeomPath(strvalue);
 103         }
 104
 105         signal_path_changed.emit();
 106         return true;
 107     }
 108
 109     return false;
 110 }
 111
 112 gchar *
 113 PathParam::param_writeSVGValue() const
 114 {
 115     gchar * svgd = SVGD_from_2GeomPath( _pathvector );
 116     return svgd;
 117 }
 118
 119 Gtk::Widget *
 120 PathParam::param_newWidget(Gtk::Tooltips * tooltips)
 121 {
 122     Gtk::HBox * _widget = Gtk::manage(new Gtk::HBox());
 123
 124     Gtk::Label* pLabel = Gtk::manage(new Gtk::Label(param_label));
 125     static_cast<Gtk::HBox*>(_widget)->pack_start(*pLabel, true, true);
 126     tooltips->set_tip(*pLabel, param_tooltip);
 127
 128     Gtk::Widget*  pIcon = Gtk::manage( sp_icon_get_icon( "draw_node", Inkscape::ICON_SIZE_BUTTON) );
 129     Gtk::Button * pButton = Gtk::manage(new Gtk::Button());
 130     pButton->set_relief(Gtk::RELIEF_NONE);
 131     pIcon->show();
 132     pButton->add(*pIcon);
 133     pButton->show();
 134     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_edit_button_click));
 135     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
 136     tooltips->set_tip(*pButton, _("Edit on-canvas"));
 137
 138     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_COPY, Inkscape::ICON_SIZE_BUTTON) );
 139     pButton = Gtk::manage(new Gtk::Button());
 140     pButton->set_relief(Gtk::RELIEF_NONE);
 141     pIcon->show();
 142     pButton->add(*pIcon);
 143     pButton->show();
 144     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_copy_button_click));
 145     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
 146     tooltips->set_tip(*pButton, _("Copy path"));
 147
 148     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_PASTE, Inkscape::ICON_SIZE_BUTTON) );
 149     pButton = Gtk::manage(new Gtk::Button());
 150     pButton->set_relief(Gtk::RELIEF_NONE);
 151     pIcon->show();
 152     pButton->add(*pIcon);
 153     pButton->show();
 154     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_paste_button_click));
 155     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
 156     tooltips->set_tip(*pButton, _("Paste path"));
 157
 158     static_cast<Gtk::HBox*>(_widget)->show_all_children();
 159
 160     return dynamic_cast<Gtk::Widget *> (_widget);
 161 }
 162
 163 void
 164 PathParam::param_editOncanvas(SPItem * item, SPDesktop * dt)
 165 {
 166     // If not already in nodecontext, goto it!
 167     if (!tools_isactive(dt, TOOLS_NODES)) {
 168         tools_switch_current(TOOLS_NODES);
 169     }
 170
 171     ShapeEditor * shape_editor = SP_NODE_CONTEXT( dt->event_context )->shape_editor;
 172     if (!href) {
 173         shape_editor->set_item_lpe_path_parameter(item, SP_OBJECT(param_effect->getLPEObj()), param_key.c_str());
 174     } else {
 175         // set referred item for editing
 176     }
 177 }
 178
 179 void
 180 PathParam::param_setup_nodepath(Inkscape::NodePath::Path *np)
 181 {
 182     np->show_helperpath = true;
 183     np->helperpath_rgba = 0x009000ff;
 184     np->helperpath_width = 1.0;
 185 }
 186
 187 void
 188 PathParam::param_transform_multiply(Geom::Matrix const& postmul, bool /*set*/)
 189 {
 190     // TODO: recode this to apply transform to _pathvector instead?
 191     if (!href) {
 192         // only apply transform when not referring to other path
 193         ensure_pwd2();
 194         param_set_and_write_new_value( _pwd2 * postmul );
 195     }
 196 }
 197
 198 void
 199 PathParam::param_set_and_write_new_value (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & newpath)
 200 {
 201     _pathvector = Geom::path_from_piecewise(newpath, LPE_CONVERSION_TOLERANCE);
 202     gchar * svgd = SVGD_from_2GeomPath( _pathvector );
 203     param_write_to_repr(svgd);
 204     g_free(svgd);
 205     // force value upon pwd2 and don't recalculate.
 206     _pwd2 = newpath;
 207     must_recalculate_pwd2 = false;
 208 }
 209
 210 void
 211 PathParam::ensure_pwd2()
 212 {
 213     if (must_recalculate_pwd2) {
 214         _pwd2.clear();
 215         for (unsigned int i=0; i < _pathvector.size(); i++) {
 216             _pwd2.concat( _pathvector[i].toPwSb() );
 217         }
 218
 219         must_recalculate_pwd2 = false;
 220     }
 221 }
 222
 223 void
 224 PathParam::update_from_referred()
 225 {
 226     if (!href) {
 227         g_warning("PathParam::update_from_referred - logical error, this should not possible");
 228         return;
 229     }
 230
 231     // TODO: implement!
 232
 233     // optimize, only update from referred when referred changed.
 234 }
 235
 236 /* CALLBACK FUNCTIONS FOR THE BUTTONS */
 237 void
 238 PathParam::on_edit_button_click()
 239 {
 240     SPItem * item = sp_desktop_selection(SP_ACTIVE_DESKTOP)->singleItem();
 241     if (item != NULL) {
 242         param_editOncanvas(item, SP_ACTIVE_DESKTOP);
 243     }
 244 }
 245
 246 void
 247 PathParam::on_paste_button_click()
 248 {
 249     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
 250     Glib::ustring svgd = cm->getPathParameter();
 251
 252     if (svgd == "") return;
 253
 254     // Temporary hack until 2Geom supports arcs in SVGD
 255     if (svgd.find('A') != Glib::ustring::npos) {
 256         SP_ACTIVE_DESKTOP->messageStack()->flash( Inkscape::WARNING_MESSAGE,
 257                     _("This effect does not support arcs yet, try to convert to path.") );
 258         return;
 259     } else {
 260         param_write_to_repr(svgd.data());
 261         signal_path_pasted.emit();
 262         sp_document_done(param_effect->getSPDoc(), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
 263                          _("Paste path parameter"));
 264     }
 265 }
 266
 267 void
 268 PathParam::on_copy_button_click()
 269 {
 270     Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
 271     cm->copyPathParameter(this);
 272 }
 273
 274 } /* namespace LivePathEffect */
 275
 276 } /* namespace Inkscape */
 277
 278 /*
 279   Local Variables:
 280   mode:c++
 281   c-file-style:"stroustrup"
 282   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 283   indent-tabs-mode:nil
 284   fill-column:99
 285   End:
 286 */
 287 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :