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
  36 namespace Inkscape {
  37
  38 namespace LivePathEffect {
  39
  40 PathParam::PathParam( const Glib::ustring& label, const Glib::ustring& tip,
  41                       const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
  42                       Effect* effect, const gchar * default_value)
  43     : Parameter(label, tip, key, wr, effect),
  44       _pathvector(),
  45       must_recalculate_pwd2(false),
  46       _pwd2(),
  47       href(NULL)
  48 {
  49     defvalue = g_strdup(default_value);
  50     param_readSVGValue(defvalue);
  51     oncanvas_editable = true;
  52 }
  53
  54 PathParam::~PathParam()
  55 {
  56     g_free(defvalue);
  57 }
  58
  59 std::vector<Geom::Path> const &
  60 PathParam::get_pathvector()
  61 {
  62     return _pathvector;
  63 }
  64
  65 Geom::Piecewise<Geom::D2<Geom::SBasis> > const &
  66 PathParam::get_pwd2()
  67 {
  68     ensure_pwd2();
  69     return _pwd2;
  70 }
  71
  72 void
  73 PathParam::param_set_default()
  74 {
  75     param_readSVGValue(defvalue);
  76 }
  77
  78 void
  79 PathParam::param_set_and_write_default()
  80 {
  81     param_write_to_repr(defvalue);
  82 }
  83
  84 bool
  85 PathParam::param_readSVGValue(const gchar * strvalue)
  86 {
  87     if (strvalue) {
  88         _pathvector.clear();
  89         if (href) {
  90             g_free(href);
  91             href = NULL;
  92         }
  93         must_recalculate_pwd2 = true;
  94
  95         if (false /*if strvalue is xlink*/) {
  96             href = g_strdup(strvalue);
  97             update_from_referred();
  98             // TODO: add listener, because we must update when referred updates. we must always be up-to-date with referred path data
  99         } else {
 100             _pathvector = SVGD_to_2GeomPath(strvalue);
 101         }
 102
 103         signal_path_changed.emit();
 104         return true;
 105     }
 106
 107     return false;
 108 }
 109
 110 gchar *
 111 PathParam::param_writeSVGValue() const
 112 {
 113     gchar * svgd = SVGD_from_2GeomPath( _pathvector );
 114     return svgd;
 115 }
 116
 117 Gtk::Widget *
 118 PathParam::param_newWidget(Gtk::Tooltips * tooltips)
 119 {
 120     Gtk::HBox * _widget = Gtk::manage(new Gtk::HBox());
 121
 122     Gtk::Label* pLabel = Gtk::manage(new Gtk::Label(param_label));
 123     static_cast<Gtk::HBox*>(_widget)->pack_start(*pLabel, true, true);
 124     tooltips->set_tip(*pLabel, param_tooltip);
 125
 126     Gtk::Widget*  pIcon = Gtk::manage( sp_icon_get_icon( "draw_node", Inkscape::ICON_SIZE_BUTTON) );
 127     Gtk::Button * pButton = Gtk::manage(new Gtk::Button());
 128     pButton->set_relief(Gtk::RELIEF_NONE);
 129     pIcon->show();
 130     pButton->add(*pIcon);
 131     pButton->show();
 132     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_edit_button_click));
 133     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
 134     tooltips->set_tip(*pButton, _("Edit on-canvas"));
 135
 136     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_COPY, Inkscape::ICON_SIZE_BUTTON) );
 137     pButton = Gtk::manage(new Gtk::Button());
 138     pButton->set_relief(Gtk::RELIEF_NONE);
 139     pIcon->show();
 140     pButton->add(*pIcon);
 141     pButton->show();
 142     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_copy_button_click));
 143     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
 144     tooltips->set_tip(*pButton, _("Copy path"));
 145
 146     pIcon = Gtk::manage( sp_icon_get_icon( GTK_STOCK_PASTE, Inkscape::ICON_SIZE_BUTTON) );
 147     pButton = Gtk::manage(new Gtk::Button());
 148     pButton->set_relief(Gtk::RELIEF_NONE);
 149     pIcon->show();
 150     pButton->add(*pIcon);
 151     pButton->show();
 152     pButton->signal_clicked().connect(sigc::mem_fun(*this, &PathParam::on_paste_button_click));
 153     static_cast<Gtk::HBox*>(_widget)->pack_start(*pButton, true, true);
 154     tooltips->set_tip(*pButton, _("Paste path"));
 155
 156     static_cast<Gtk::HBox*>(_widget)->show_all_children();
 157
 158     return dynamic_cast<Gtk::Widget *> (_widget);
 159 }
 160
 161 void
 162 PathParam::param_editOncanvas(SPItem * item, SPDesktop * dt)
 163 {
 164     // If not already in nodecontext, goto it!
 165     if (!tools_isactive(dt, TOOLS_NODES)) {
 166         tools_switch_current(TOOLS_NODES);
 167     }
 168
 169     ShapeEditor * shape_editor = SP_NODE_CONTEXT( dt->event_context )->shape_editor;
 170     if (!href) {
 171         shape_editor->set_item_lpe_path_parameter(item, SP_OBJECT(param_effect->getLPEObj()), param_key.c_str());
 172     } else {
 173         // set referred item for editing
 174     }
 175 }
 176
 177 void
 178 PathParam::param_setup_nodepath(Inkscape::NodePath::Path *np)
 179 {
 180     np->show_helperpath = true;
 181     np->helperpath_rgba = 0x009000ff;
 182     np->helperpath_width = 1.0;
 183 }
 184
 185 void
 186 PathParam::param_transform_multiply(Geom::Matrix const& postmul, bool /*set*/)
 187 {
 188     // TODO: recode this to apply transform to _pathvector instead?
 189     if (!href) {
 190         // only apply transform when not referring to other path
 191         ensure_pwd2();
 192         param_set_and_write_new_value( _pwd2 * postmul );
 193     }
 194 }
 195
 196 void
 197 PathParam::param_set_and_write_new_value (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & newpath)
 198 {
 199     _pathvector = Geom::path_from_piecewise(newpath, LPE_CONVERSION_TOLERANCE);
 200     gchar * svgd = SVGD_from_2GeomPath( _pathvector );
 201     param_write_to_repr(svgd);
 202     g_free(svgd);
 203     // force value upon pwd2 and don't recalculate.
 204     _pwd2 = newpath;
 205     must_recalculate_pwd2 = false;
 206 }
 207
 208 void
 209 PathParam::ensure_pwd2()
 210 {
 211     if (must_recalculate_pwd2) {
 212         _pwd2.clear();
 213         for (unsigned int i=0; i < _pathvector.size(); i++) {
 214             _pwd2.concat( _pathvector[i].toPwSb() );
 215         }
 216
 217         must_recalculate_pwd2 = false;
 218     }
 219 }
 220
 221 void
 222 PathParam::update_from_referred()
 223 {
 224     if (!href) {
 225         g_warning("PathParam::update_from_referred - logical error, this should not possible");
 226         return;
 227     }
 228
 229     // TODO: implement!
 230
 231     // optimize, only update from referred when referred changed.
 232 }
 233
 234 /* CALLBACK FUNCTIONS FOR THE BUTTONS */
 235 void
 236 PathParam::on_edit_button_click()
 237 {
 238     SPItem * item = sp_desktop_selection(SP_ACTIVE_DESKTOP)->singleItem();
 239     if (item != NULL) {
 240         param_editOncanvas(item, SP_ACTIVE_DESKTOP);
 241     }
 242 }
 243
 244 void
 245 PathParam::on_paste_button_click()
 246 {
 247     // check if something is in the clipboard
 248     GSList * clipboard = sp_selection_get_clipboard();
 249     if (clipboard == NULL || clipboard->data == NULL) {
 250         SP_ACTIVE_DESKTOP->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Nothing on the clipboard."));
 251         return;
 252     }
 253
 254     Inkscape::XML::Node *repr = (Inkscape::XML::Node *) clipboard->data;
 255     if (!strcmp (repr->name(), "svg:path")) {
 256         const char * svgd = repr->attribute("d");
 257         if (svgd) {
 258             if (strchr(svgd,'A')) { // FIXME: temporary hack until 2Geom supports arcs in SVGD
 259                 SP_ACTIVE_DESKTOP->messageStack()->flash( Inkscape::WARNING_MESSAGE,
 260                             _("This effect does not support arcs yet, try to convert to path.") );
 261                 return;
 262             } else {
 263                 param_write_to_repr(svgd);
 264                 signal_path_pasted.emit();
 265                 sp_document_done(param_effect->getSPDoc(), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
 266                                  _("Paste path parameter"));
 267             }
 268         }
 269     } else {
 270         SP_ACTIVE_DESKTOP->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Clipboard does not contain a path."));
 271         return;
 272     }
 273 }
 274
 275 void
 276 PathParam::on_copy_button_click()
 277 {
 278     sp_selection_copy_lpe_pathparam(this);
 279 }
 280
 281 } /* namespace LivePathEffect */
 282
 283 } /* namespace Inkscape */
 284
 285 /*
 286   Local Variables:
 287   mode:c++
 288   c-file-style:"stroustrup"
 289   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 290   indent-tabs-mode:nil
 291   fill-column:99
 292   End:
 293 */
 294 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :