src/ui/dialog/document-properties.cpp

   1 /** \file
   2  *
   3  * Document properties dialog, Gtkmm-style
   4  *
   5  * Authors:
   6  *   bulia byak <buliabyak@users.sf.net>
   7  *   Bryce W. Harrington <bryce@bryceharrington.org>
   8  *   Lauris Kaplinski <lauris@kaplinski.com>
   9  *   Jon Phillips <jon@rejon.org>
  10  *   Ralf Stephan <ralf@ark.in-berlin.de> (Gtkmm)
  11  *
  12  * Copyright (C) 2006-2007 Johan Engelen  <johan@shouraizou.nl>
  13  * Copyright (C) 2000 - 2005 Authors
  14  *
  15  * Released under GNU GPL.  Read the file 'COPYING' for more information
  16  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22
  23
  24 #include <gtkmm.h>
  25 #include "ui/widget/color-picker.h"
  26 #include "ui/widget/scalar-unit.h"
  27
  28 #include "xml/node-event-vector.h"
  29 #include "helper/units.h"
  30 #include "prefs-utils.h"
  31
  32 #include "inkscape.h"
  33 #include "verbs.h"
  34 #include "document.h"
  35 #include "desktop-handles.h"
  36 #include "desktop.h"
  37 #include "sp-namedview.h"
  38
  39 #include "document-properties.h"
  40
  41 #include "display/canvas-grid.h"
  42
  43 using std::pair;
  44
  45 namespace Inkscape {
  46 namespace UI {
  47 namespace Dialog {
  48
  49 #define SPACE_SIZE_X 15
  50 #define SPACE_SIZE_Y 10
  51
  52 //===================================================
  53
  54 //---------------------------------------------------
  55
  56 static DocumentProperties *_instance = 0;
  57
  58 static void on_child_added(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, void * data);
  59 static void on_child_removed(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, void * data);
  60 static void on_repr_attr_changed (Inkscape::XML::Node *, gchar const *, gchar const *, gchar const *, bool, gpointer);
  61 static void on_doc_replaced (SPDesktop* dt, SPDocument* doc);
  62 static void on_activate_desktop (Inkscape::Application *, SPDesktop* dt, void*);
  63 static void on_deactivate_desktop (Inkscape::Application *, SPDesktop* dt, void*);
  64
  65 static Inkscape::XML::NodeEventVector const _repr_events = {
  66     on_child_added, /* child_added */
  67     on_child_removed, /* child_removed */
  68     on_repr_attr_changed,
  69     NULL, /* content_changed */
  70     NULL  /* order_changed */
  71 };
  72
  73
  74 DocumentProperties*
  75 DocumentProperties::create()
  76 {
  77     if (_instance) return _instance;
  78     _instance = new DocumentProperties;
  79     _instance->init();
  80     return _instance;
  81 }
  82
  83 void
  84 DocumentProperties::destroy()
  85 {
  86     if (_instance)
  87     {
  88         delete _instance;
  89         _instance = 0;
  90     }
  91 }
  92
  93 DocumentProperties::DocumentProperties()
  94     : Dialog ("dialogs.documentoptions", SP_VERB_DIALOG_NAMEDVIEW),
  95       _page_page(1, 1), _page_guides(1, 1),
  96       _page_snap(1, 1), _page_grids(1, 1),
  97       _grids_button_new(_("_New"), _("Create new grid.")),
  98       _grids_button_remove(_("_Remove"), _("Remove selected grid.")),
  99       _prefs_path("dialogs.documentoptions")
 100 {
 101     set_resizable (false);
 102     _tt.enable();
 103     get_vbox()->set_spacing (4);
 104     get_vbox()->pack_start (_notebook, true, true);
 105
 106     _notebook.append_page(_page_page,      _("Page"));
 107     _notebook.append_page(_page_guides,    _("Guides"));
 108     _notebook.append_page(_page_grids,     _("Grids"));
 109     _notebook.append_page(_page_snap,      _("Snapping"));
 110
 111     build_page();
 112     build_guides();
 113     build_gridspage();
 114     build_snap();
 115
 116     _grids_button_new.signal_clicked().connect(sigc::mem_fun(*this, &DocumentProperties::onNewGrid));
 117     _grids_button_remove.signal_clicked().connect(sigc::mem_fun(*this, &DocumentProperties::onRemoveGrid));
 118 }
 119
 120 void
 121 DocumentProperties::init()
 122 {
 123     update();
 124
 125     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 126     repr->addListener (&_repr_events, this);
 127     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 128     root->addListener (&_repr_events, this);
 129
 130     _doc_replaced_connection = SP_ACTIVE_DESKTOP->connectDocumentReplaced (sigc::ptr_fun (on_doc_replaced));
 131
 132     g_signal_connect(G_OBJECT(INKSCAPE), "activate_desktop",
 133                      G_CALLBACK(on_activate_desktop), 0);
 134
 135     g_signal_connect(G_OBJECT(INKSCAPE), "deactivate_desktop",
 136                      G_CALLBACK(on_deactivate_desktop), 0);
 137
 138     show_all_children();
 139
 140     present();
 141 }
 142
 143 DocumentProperties::~DocumentProperties()
 144 {
 145     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 146     repr->removeListenerByData (this);
 147     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 148     root->removeListenerByData (this);
 149     _doc_replaced_connection.disconnect();
 150 }
 151
 152 //========================================================================
 153
 154 /**
 155  * Helper function that attaches widgets in a 3xn table. The widgets come in an
 156  * array that has two entries per table row. The two entries code for four
 157  * possible cases: (0,0) means insert space in first column; (0, non-0) means
 158  * widget in columns 2-3; (non-0, 0) means label in columns 1-3; and
 159  * (non-0, non-0) means two widgets in columns 2 and 3.
 160 **/
 161 inline void
 162 attach_all(Gtk::Table &table, Gtk::Widget *const arr[], unsigned const n, int start = 0)
 163 {
 164     for (unsigned i = 0, r = start; i < n; i += 2)
 165     {
 166         if (arr[i] && arr[i+1])
 167         {
 168             table.attach(*arr[i],   1, 2, r, r+1,
 169                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 170             table.attach(*arr[i+1], 2, 3, r, r+1,
 171                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 172         }
 173         else
 174         {
 175             if (arr[i+1])
 176                 table.attach(*arr[i+1], 1, 3, r, r+1,
 177                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 178             else if (arr[i])
 179             {
 180                 Gtk::Label& label = reinterpret_cast<Gtk::Label&>(*arr[i]);
 181                 label.set_alignment (0.0);
 182                 table.attach (label, 0, 3, r, r+1,
 183                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 184             }
 185             else
 186             {
 187                 Gtk::HBox *space = manage (new Gtk::HBox);
 188                 space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
 189                 table.attach (*space, 0, 1, r, r+1,
 190                       (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
 191             }
 192         }
 193         ++r;
 194     }
 195 }
 196
 197 void
 198 DocumentProperties::build_page()
 199 {
 200     _page_page.show();
 201
 202     _rcp_bg.init (_("Back_ground:"), _("Background color"), _("Color and transparency of the page background (also used for bitmap export)"),
 203                    "pagecolor", "inkscape:pageopacity", _wr);
 204     _rcb_canb.init (_("Show page _border"), _("If set, rectangular page border is shown"), "showborder", _wr, false);
 205     _rcb_bord.init (_("Border on _top of drawing"), _("If set, border is always on top of the drawing"), "borderlayer", _wr, false);
 206     _rcp_bord.init (_("Border _color:"), _("Page border color"),
 207                     _("Color of the page border"),
 208                     "bordercolor", "borderopacity", _wr);
 209     _rcb_shad.init (_("_Show border shadow"), _("If set, page border shows a shadow on its right and lower side"), "inkscape:showpageshadow", _wr, false);
 210     _rum_deflt.init (_("Default _units:"), "inkscape:document-units", _wr);
 211
 212     Gtk::Label* label_gen = manage (new Gtk::Label);
 213     label_gen->set_markup (_("<b>General</b>"));
 214     Gtk::Label* label_bor = manage (new Gtk::Label);
 215     label_bor->set_markup (_("<b>Border</b>"));
 216     Gtk::Label *label_for = manage (new Gtk::Label);
 217     label_for->set_markup (_("<b>Format</b>"));
 218     _page_sizer.init (_wr);
 219
 220     Gtk::Widget *const widget_array[] =
 221     {
 222         label_gen,         0,
 223         _rum_deflt._label, _rum_deflt._sel,
 224         _rcp_bg._label,    _rcp_bg._cp,
 225         0,                 0,
 226         label_for,         0,
 227         0,                 &_page_sizer,
 228         0,                 0,
 229         label_bor,         0,
 230         0,                 _rcb_canb._button,
 231         0,                 _rcb_bord._button,
 232         0,                 _rcb_shad._button,
 233         _rcp_bord._label,  _rcp_bord._cp,
 234     };
 235
 236     attach_all(_page_page.table(), widget_array, G_N_ELEMENTS(widget_array));
 237 }
 238
 239 void
 240 DocumentProperties::build_guides()
 241 {
 242     _page_guides.show();
 243
 244     _rcb_sgui.init (_("Show _guides"), _("Show or hide guides"), "showguides", _wr);
 245     _rcp_gui.init (_("Guide co_lor:"), _("Guideline color"),
 246                    _("Color of guidelines"), "guidecolor", "guideopacity", _wr);
 247     _rcp_hgui.init (_("_Highlight color:"), _("Highlighted guideline color"),
 248                     _("Color of a guideline when it is under mouse"),
 249                     "guidehicolor", "guidehiopacity", _wr);
 250     Gtk::Label *label_gui = manage (new Gtk::Label);
 251     label_gui->set_markup (_("<b>Guides</b>"));
 252
 253     Gtk::Widget *const widget_array[] =
 254     {
 255         label_gui,       0,
 256         0,               _rcb_sgui._button,
 257         _rcp_gui._label, _rcp_gui._cp,
 258         _rcp_hgui._label, _rcp_hgui._cp,
 259     };
 260
 261     attach_all(_page_guides.table(), widget_array, G_N_ELEMENTS(widget_array));
 262 }
 263
 264 void
 265 DocumentProperties::build_snap()
 266 {
 267     _page_snap.show();
 268         //General options
 269         _rcbsnbb.init (_("Snap bounding _box corners"),
 270                 _("Snap bounding box corners to grid lines, to guides, and to other bounding boxes (only applicable to the selector tool)"),
 271                 "inkscape:snap-bbox", _wr);
 272     _rcbsnn.init (_("Snap _nodes"),
 273                 _("Snap nodes to grid lines, to guides, to paths, and to other nodes"),
 274                 "inkscape:snap-nodes", _wr);
 275     _rcbic.init (_("Include the object's center"),
 276                 _("Also snap the rotation center of an object when snapping nodes"),
 277                 "inkscape:snap-center", _wr);
 278
 279     //Options for snapping to objects
 280     _rcbsnop.init (_("Snap to _paths"),
 281                 _("Snap nodes to object paths"),
 282                 "inkscape:object-paths", _wr);
 283     _rcbsnon.init (_("Snap to n_odes"),
 284                 _("Snap nodes to object nodes"),
 285                 "inkscape:object-nodes", _wr);
 286     _rsu_sno.init (_("Snap _distance"), _("Snap at any dist_ance"),
 287                   _("Snapping distance, in screen pixels, for snapping to objects"),
 288                   _("If set, objects snap to the nearest object, regardless of distance"),
 289                   "objecttolerance", _wr);
 290
 291     //Options for snapping to grids
 292     _rsu_sn.init (_("Snap d_istance"), _("Snap at any distan_ce"),
 293                   _("Snapping distance, in screen pixels, for snapping to grid"),
 294                   _("If set, objects snap to the nearest grid line, regardless of distance"),
 295                   "gridtolerance", _wr);
 296
 297         //Options for snapping to guides
 298     _rsu_gusn.init (_("Snap di_stance"), _("Snap at any distanc_e"),
 299                 _("Snapping distance, in screen pixels, for snapping to guides"),
 300                 _("If set, objects snap to the nearest guide, regardless of distance"),
 301                 "guidetolerance", _wr);
 302
 303     std::list<Gtk::ToggleButton*> list;
 304     list.push_back(_rcbic._button);
 305     list.push_back(_rcbsnop._button);
 306     list.push_back(_rcbsnon._button);
 307     _rcbsnn.setSlaveButton(list);
 308
 309
 310     Gtk::Label *label_g = manage (new Gtk::Label);
 311     label_g->set_markup (_("<b>General</b>"));
 312     Gtk::Label *label_o = manage (new Gtk::Label);
 313     label_o->set_markup (_("<b>Object Snapping</b>"));
 314     Gtk::Label *label_gr = manage (new Gtk::Label);
 315     label_gr->set_markup (_("<b>Grid Snapping</b>"));
 316     Gtk::Label *label_gu = manage (new Gtk::Label);
 317     label_gu->set_markup (_("<b>Guide Snapping</b>"));
 318
 319     Gtk::Widget *const array[] =
 320     {
 321         label_g,            0,
 322         0,                  _rcbsnn._button,
 323         0,                                      0,                                      //_rcbic._button will be inserted here
 324         0,                  _rcbsnbb._button,
 325         0,                                      0,
 326         label_o,            0,
 327         0,                                      _rcbsnop._button,
 328         0,                                      _rcbsnon._button,
 329         0,                  _rsu_sno._vbox,
 330         0,                                      0,
 331         label_gr,           0,
 332         0,                  _rsu_sn._vbox,
 333         0,                                      0,
 334         label_gu,               0,
 335         0,                      _rsu_gusn._vbox,
 336     };
 337
 338     attach_all(_page_snap.table(), array, G_N_ELEMENTS(array));
 339
 340     // add _rcbic manually to get some additional indenting
 341     _page_snap.table().attach(*_rcbic._button, 1, 3, 2, 3, Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0, 18, 0);
 342  }
 343
 344 /**
 345 * Called for _updating_ the dialog (e.g. when a new grid was manually added in XML)
 346 */
 347 void
 348 DocumentProperties::update_gridspage()
 349 {
 350     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 351     SPNamedView *nv = sp_desktop_namedview(dt);
 352
 353     //remove all tabs
 354     while (_grids_notebook.get_current_page() != -1) {
 355         _grids_notebook.remove_page(-1);
 356     }
 357
 358     //add tabs
 359     for (GSList const * l = nv->grids; l != NULL; l = l->next) {
 360         Inkscape::CanvasGrid * grid = (Inkscape::CanvasGrid*) l->data;
 361         _grids_notebook.append_page(grid->getWidget(), grid->repr->attribute("id"));
 362
 363     }
 364     _grids_notebook.show_all();
 365
 366     _page_grids.table().resize_children();
 367 }
 368
 369 /**
 370  * Build grid page of dialog.
 371  */
 372 void
 373 DocumentProperties::build_gridspage()
 374 {
 375     _page_grids.show();
 376
 377     /// \todo FIXME: gray out snapping when grid is off.
 378     /// Dissenting view: you want snapping without grid.
 379
 380     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 381     SPNamedView *nv = sp_desktop_namedview(dt);
 382
 383     Gtk::Label* label_crea = manage (new Gtk::Label);
 384     label_crea->set_markup (_("<b>Creation</b>"));
 385     Gtk::Label* label_crea_type = manage (new Gtk::Label);
 386     label_crea_type->set_markup (_("Gridtype"));
 387
 388     for (gint t = 0; t <= GRID_MAXTYPENR; t++) {
 389         _grids_combo_gridtype.append_text( CanvasGrid::getName( (GridType) t ) );
 390     }
 391     _grids_combo_gridtype.set_active_text( CanvasGrid::getName(GRID_RECTANGULAR) );
 392
 393     Gtk::Label* label_def = manage (new Gtk::Label);
 394     label_def->set_markup (_("<b>Defined grids</b>"));
 395
 396     for (GSList const * l = nv->grids; l != NULL; l = l->next) {
 397         Inkscape::CanvasGrid * grid = (Inkscape::CanvasGrid*) l->data;
 398         _grids_notebook.append_page(grid->getWidget(), grid->repr->attribute("id"));
 399     }
 400
 401     Gtk::Widget *const widget_array[] =
 402     {
 403         label_crea, 0,
 404         label_crea_type, (Gtk::Widget*) &_grids_combo_gridtype,
 405         (Gtk::Widget*) &_grids_button_new,         (Gtk::Widget*) &_grids_button_remove,
 406         label_def,         0
 407     };
 408     attach_all(_page_grids.table(), widget_array, G_N_ELEMENTS(widget_array));
 409     _page_grids.table().attach(_grids_notebook, 0, 3, 4, 5,
 410                                Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 411 }
 412
 413
 414
 415 /**
 416  * Update dialog widgets from desktop. Also call updateWidget routines of the grids.
 417  */
 418 void
 419 DocumentProperties::update()
 420 {
 421     if (_wr.isUpdating()) return;
 422
 423     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 424     SPNamedView *nv = sp_desktop_namedview(dt);
 425
 426     _wr.setUpdating (true);
 427     set_sensitive (true);
 428
 429     //-----------------------------------------------------------page page
 430     _rcp_bg.setRgba32 (nv->pagecolor);
 431     _rcb_canb.setActive (nv->showborder);
 432     _rcb_bord.setActive (nv->borderlayer == SP_BORDER_LAYER_TOP);
 433     _rcp_bord.setRgba32 (nv->bordercolor);
 434     _rcb_shad.setActive (nv->showpageshadow);
 435
 436     if (nv->doc_units)
 437         _rum_deflt.setUnit (nv->doc_units);
 438
 439     double const doc_w_px = sp_document_width(sp_desktop_document(dt));
 440     double const doc_h_px = sp_document_height(sp_desktop_document(dt));
 441     _page_sizer.setDim (doc_w_px, doc_h_px);
 442
 443     //-----------------------------------------------------------guide
 444     _rcb_sgui.setActive (nv->showguides);
 445     _rcp_gui.setRgba32 (nv->guidecolor);
 446     _rcp_hgui.setRgba32 (nv->guidehicolor);
 447
 448     //-----------------------------------------------------------snap
 449
 450     _rcbsnbb.setActive (nv->snap_manager.getSnapModeBBox());
 451     _rcbsnn.setActive (nv->snap_manager.getSnapModeNode());
 452     _rcbic.setActive (nv->snap_manager.getIncludeItemCenter());
 453     _rcbsnop.setActive(nv->snap_manager.object.getSnapToItemPath());
 454     _rcbsnon.setActive(nv->snap_manager.object.getSnapToItemNode());
 455     _rsu_sno.setValue (nv->objecttolerance);
 456
 457     _rsu_sn.setValue (nv->gridtolerance);
 458
 459     _rsu_gusn.setValue (nv->guidetolerance);
 460
 461     //-----------------------------------------------------------grids page
 462
 463     update_gridspage();
 464
 465     _wr.setUpdating (false);
 466 }
 467
 468 //--------------------------------------------------------------------
 469
 470 void
 471 DocumentProperties::on_response (int id)
 472 {
 473     if (id == Gtk::RESPONSE_DELETE_EVENT || id == Gtk::RESPONSE_CLOSE)
 474     {
 475         _rcp_bg.closeWindow();
 476         _rcp_bord.closeWindow();
 477         _rcp_gui.closeWindow();
 478         _rcp_hgui.closeWindow();
 479     }
 480
 481     if (id == Gtk::RESPONSE_CLOSE)
 482         hide();
 483 }
 484
 485
 486
 487 static void
 488 on_child_added(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, void * data)
 489 {
 490     if (!_instance)
 491         return;
 492
 493     _instance->update_gridspage();
 494 }
 495
 496 static void
 497 on_child_removed(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, void * data)
 498 {
 499     if (!_instance)
 500         return;
 501
 502     _instance->update_gridspage();
 503 }
 504
 505
 506
 507 /**
 508  * Called when XML node attribute changed; updates dialog widgets.
 509  */
 510 static void
 511 on_repr_attr_changed (Inkscape::XML::Node *, gchar const *, gchar const *, gchar const *, bool, gpointer)
 512 {
 513     if (!_instance)
 514         return;
 515
 516     _instance->update();
 517 }
 518
 519 static void
 520 on_activate_desktop (Inkscape::Application *, SPDesktop* dt, void*)
 521 {
 522     if (!_instance)
 523         return;
 524
 525     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 526     repr->addListener (&_repr_events, _instance);
 527     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 528     root->addListener (&_repr_events, _instance);
 529     _instance->_doc_replaced_connection = SP_ACTIVE_DESKTOP->connectDocumentReplaced (sigc::ptr_fun (on_doc_replaced));
 530     _instance->update();
 531 }
 532
 533 static void
 534 on_deactivate_desktop (Inkscape::Application *, SPDesktop* dt, void*)
 535 {
 536     if (!_instance)
 537         return;
 538
 539     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 540     repr->removeListenerByData (_instance);
 541     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 542     root->removeListenerByData (_instance);
 543     _instance->_doc_replaced_connection.disconnect();
 544 }
 545
 546 static void
 547 on_doc_replaced (SPDesktop* dt, SPDocument* doc)
 548 {
 549     if (!_instance)
 550         return;
 551
 552     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(dt));
 553     repr->addListener (&_repr_events, _instance);
 554     Inkscape::XML::Node *root = SP_OBJECT_REPR(doc->root);
 555     root->addListener (&_repr_events, _instance);
 556     _instance->update();
 557 }
 558
 559
 560
 561
 562 /*########################################################################
 563 # BUTTON CLICK HANDLERS    (callbacks)
 564 ########################################################################*/
 565
 566 void
 567 DocumentProperties::onNewGrid()
 568 {
 569     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 570     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(dt));
 571     SPDocument *doc = sp_desktop_document(dt);
 572
 573     Glib::ustring typestring = _grids_combo_gridtype.get_active_text();
 574     CanvasGrid::writeNewGridToRepr(repr, doc, CanvasGrid::getGridTypeFromName(typestring.c_str()));
 575 }
 576
 577
 578 void
 579 DocumentProperties::onRemoveGrid()
 580 {
 581     gint pagenum = _grids_notebook.get_current_page();
 582     if (pagenum == -1) // no pages
 583       return;
 584
 585     Gtk::Widget *page = _grids_notebook.get_nth_page(pagenum);
 586     if (!page) return;
 587
 588     Glib::ustring tabtext = _grids_notebook.get_tab_label_text(*page);
 589
 590     // find the grid with name tabtext (it's id) and delete that one.
 591     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 592     SPNamedView *nv = sp_desktop_namedview(dt);
 593     Inkscape::CanvasGrid * found_grid = NULL;
 594     for (GSList const * l = nv->grids; l != NULL; l = l->next) {
 595         Inkscape::CanvasGrid * grid = (Inkscape::CanvasGrid*) l->data;
 596         gchar const *idtext = grid->repr->attribute("id");
 597         if ( !strcmp(tabtext.c_str(), idtext) ) {
 598             found_grid = grid;
 599             break; // break out of for-loop
 600         }
 601     }
 602     if (found_grid) {
 603         // delete the grid that corresponds with the selected tab
 604         // when the grid is deleted from SVG, the SPNamedview handler automatically deletes the object, so found_grid becomes an invalid pointer!
 605         found_grid->repr->parent()->removeChild(found_grid->repr);
 606         sp_document_done(sp_desktop_document(dt), SP_VERB_DIALOG_NAMEDVIEW, _("Remove grid"));
 607     }
 608 }
 609
 610
 611 } // namespace Dialog
 612 } // namespace UI
 613 } // namespace Inkscape
 614
 615 /*
 616   Local Variables:
 617   mode:c++
 618   c-file-style:"stroustrup"
 619   c-file-offsets:((innamespace . 0)(inline-open . 0))
 620   indent-tabs-mode:nilu
 621   fill-column:99
 622   End:
 623 */
 624 // vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :