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(Behavior::BehaviorFactory behavior_factory)
  76 {
  77     if (_instance) return _instance;
  78     _instance = new DocumentProperties(behavior_factory);
  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(Behavior::BehaviorFactory behavior_factory)
  94     : Dialog (behavior_factory, "dialogs.documentoptions", SP_VERB_DIALOG_NAMEDVIEW),
  95       _page_page(1, 1), _page_guides(1, 1),
  96       _page_snap(1, 1), _page_snap_dtls(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,      _("Snap"));
 110     _notebook.append_page(_page_snap_dtls, _("Snap details"));
 111
 112     build_page();
 113     build_guides();
 114     build_gridspage();
 115     build_snap();
 116     build_snap_dtls();
 117
 118     _grids_button_new.signal_clicked().connect(sigc::mem_fun(*this, &DocumentProperties::onNewGrid));
 119     _grids_button_remove.signal_clicked().connect(sigc::mem_fun(*this, &DocumentProperties::onRemoveGrid));
 120 }
 121
 122 void
 123 DocumentProperties::init()
 124 {
 125     update();
 126
 127     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 128     repr->addListener (&_repr_events, this);
 129     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 130     root->addListener (&_repr_events, this);
 131
 132     _doc_replaced_connection = SP_ACTIVE_DESKTOP->connectDocumentReplaced (sigc::ptr_fun (on_doc_replaced));
 133
 134     g_signal_connect(G_OBJECT(INKSCAPE), "activate_desktop",
 135                      G_CALLBACK(on_activate_desktop), 0);
 136
 137     g_signal_connect(G_OBJECT(INKSCAPE), "deactivate_desktop",
 138                      G_CALLBACK(on_deactivate_desktop), 0);
 139
 140     show_all_children();
 141
 142     present();
 143 }
 144
 145 DocumentProperties::~DocumentProperties()
 146 {
 147     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 148     repr->removeListenerByData (this);
 149     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 150     root->removeListenerByData (this);
 151     _doc_replaced_connection.disconnect();
 152 }
 153
 154 //========================================================================
 155
 156 /**
 157  * Helper function that attaches widgets in a 3xn table. The widgets come in an
 158  * array that has two entries per table row. The two entries code for four
 159  * possible cases: (0,0) means insert space in first column; (0, non-0) means
 160  * widget in columns 2-3; (non-0, 0) means label in columns 1-3; and
 161  * (non-0, non-0) means two widgets in columns 2 and 3.
 162 **/
 163 inline void
 164 attach_all(Gtk::Table &table, Gtk::Widget *const arr[], unsigned const n, int start = 0)
 165 {
 166     for (unsigned i = 0, r = start; i < n; i += 2)
 167     {
 168         if (arr[i] && arr[i+1])
 169         {
 170             table.attach(*arr[i],   1, 2, r, r+1,
 171                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 172             table.attach(*arr[i+1], 2, 3, r, r+1,
 173                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 174         }
 175         else
 176         {
 177             if (arr[i+1])
 178                 table.attach(*arr[i+1], 1, 3, r, r+1,
 179                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 180             else if (arr[i])
 181             {
 182                 Gtk::Label& label = reinterpret_cast<Gtk::Label&>(*arr[i]);
 183                 label.set_alignment (0.0);
 184                 table.attach (label, 0, 3, r, r+1,
 185                       Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 186             }
 187             else
 188             {
 189                 Gtk::HBox *space = manage (new Gtk::HBox);
 190                 space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
 191                 table.attach (*space, 0, 1, r, r+1,
 192                       (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
 193             }
 194         }
 195         ++r;
 196     }
 197 }
 198
 199 void
 200 DocumentProperties::build_page()
 201 {
 202     _page_page.show();
 203
 204     _rcp_bg.init (_("Back_ground:"), _("Background color"), _("Color and transparency of the page background (also used for bitmap export)"),
 205                    "pagecolor", "inkscape:pageopacity", _wr);
 206     _rcb_canb.init (_("Show page _border"), _("If set, rectangular page border is shown"), "showborder", _wr, false);
 207     _rcb_bord.init (_("Border on _top of drawing"), _("If set, border is always on top of the drawing"), "borderlayer", _wr, false);
 208     _rcp_bord.init (_("Border _color:"), _("Page border color"),
 209                     _("Color of the page border"),
 210                     "bordercolor", "borderopacity", _wr);
 211     _rcb_shad.init (_("_Show border shadow"), _("If set, page border shows a shadow on its right and lower side"), "inkscape:showpageshadow", _wr, false);
 212     _rum_deflt.init (_("Default _units:"), "inkscape:document-units", _wr);
 213
 214     Gtk::Label* label_gen = manage (new Gtk::Label);
 215     label_gen->set_markup (_("<b>General</b>"));
 216     Gtk::Label* label_bor = manage (new Gtk::Label);
 217     label_bor->set_markup (_("<b>Border</b>"));
 218     Gtk::Label *label_for = manage (new Gtk::Label);
 219     label_for->set_markup (_("<b>Format</b>"));
 220     _page_sizer.init (_wr);
 221
 222     Gtk::Widget *const widget_array[] =
 223     {
 224         label_gen,         0,
 225         _rum_deflt._label, _rum_deflt._sel,
 226         _rcp_bg._label,    _rcp_bg._cp,
 227         0,                 0,
 228         label_for,         0,
 229         0,                 &_page_sizer,
 230         0,                 0,
 231         label_bor,         0,
 232         0,                 _rcb_canb._button,
 233         0,                 _rcb_bord._button,
 234         0,                 _rcb_shad._button,
 235         _rcp_bord._label,  _rcp_bord._cp,
 236     };
 237
 238     attach_all(_page_page.table(), widget_array, G_N_ELEMENTS(widget_array));
 239 }
 240
 241 void
 242 DocumentProperties::build_guides()
 243 {
 244     _page_guides.show();
 245
 246     _rcb_sgui.init (_("Show _guides"), _("Show or hide guides"), "showguides", _wr);
 247     _rcp_gui.init (_("Guide co_lor:"), _("Guideline color"),
 248                    _("Color of guidelines"), "guidecolor", "guideopacity", _wr);
 249     _rcp_hgui.init (_("_Highlight color:"), _("Highlighted guideline color"),
 250                     _("Color of a guideline when it is under mouse"),
 251                     "guidehicolor", "guidehiopacity", _wr);
 252     Gtk::Label *label_gui = manage (new Gtk::Label);
 253     label_gui->set_markup (_("<b>Guides</b>"));
 254
 255     Gtk::Widget *const widget_array[] =
 256     {
 257         label_gui,       0,
 258         0,               _rcb_sgui._button,
 259         _rcp_gui._label, _rcp_gui._cp,
 260         _rcp_hgui._label, _rcp_hgui._cp,
 261     };
 262
 263     attach_all(_page_guides.table(), widget_array, G_N_ELEMENTS(widget_array));
 264 }
 265
 266 void
 267 DocumentProperties::build_snap()
 268 {
 269     _page_snap.show();
 270         //General options
 271         _rcbsnbb.init (_("_Bounding box corners"),
 272                 _("Snap bounding box corners to grid lines, to guides, and to other bounding boxes (Snapping of bounding boxes is only available in the selector tool)"),
 273                 "inkscape:snap-bbox", _wr);
 274     _rcbsnn.init (_("_Nodes"),
 275                 _("Snap nodes to grid lines, to guides, to paths, and to other nodes"),
 276                 "inkscape:snap-nodes", _wr);
 277
 278     //Options for snapping to objects
 279     _rcbsnop.init (_("Snap to pat_hs"),
 280                 _("Snap nodes to object paths"),
 281                 "inkscape:object-paths", _wr);
 282     _rcbsnon.init (_("Snap to n_odes"),
 283                 _("Snap nodes and guides to object nodes"),
 284                 "inkscape:object-nodes", _wr);
 285     _rcbsnbbn.init (_("Snap to bounding box co_rners"),
 286                 _("Snap bounding box corners to other bounding box corners"),
 287                 "inkscape:bbox-nodes", _wr);
 288     _rcbsnbbp.init (_("Snap to bounding box _edges"),
 289                 _("Snap bounding box corners and guides to bounding box edges"),
 290                 "inkscape:bbox-paths", _wr);
 291
 292     _rsu_sno.init (_("Snap _distance"), _("Snap at any d_istance"),
 293                   _("Snapping distance, in screen pixels, for snapping to objects"),
 294                   _("If set, objects snap to the nearest object, regardless of distance"),
 295                   "objecttolerance", _wr);
 296
 297     //Options for snapping to grids
 298     _rsu_sn.init (_("Snap di_stance"), _("Snap at any dis_tance"),
 299                   _("Snapping distance, in screen pixels, for snapping to grid"),
 300                   _("If set, objects snap to the nearest grid line, regardless of distance"),
 301                   "gridtolerance", _wr);
 302
 303         //Options for snapping to guides
 304     _rsu_gusn.init (_("Snap dist_ance"), _("Snap at any distan_ce"),
 305                 _("Snapping distance, in screen pixels, for snapping to guides"),
 306                 _("If set, objects snap to the nearest guide, regardless of distance"),
 307                 "guidetolerance", _wr);
 308
 309     //Other options to locate here: e.g. visual snapping indicators on/off
 310
 311     std::list<Gtk::ToggleButton*> slaves;
 312     slaves.push_back(_rcbsnop._button);
 313     slaves.push_back(_rcbsnon._button);
 314     _rcbsnn.setSlaveButton(slaves);
 315
 316     slaves.clear();
 317     slaves.push_back(_rcbsnbbp._button);
 318     slaves.push_back(_rcbsnbbn._button);
 319     _rcbsnbb.setSlaveButton(slaves);
 320
 321     Gtk::Label *label_g = manage (new Gtk::Label);
 322     label_g->set_markup (_("<b>Snapping of</b>"));
 323     Gtk::Label *label_o = manage (new Gtk::Label);
 324     label_o->set_markup (_("<b>Snapping to objects</b>"));
 325     Gtk::Label *label_gr = manage (new Gtk::Label);
 326     label_gr->set_markup (_("<b>Snapping to grids</b>"));
 327     Gtk::Label *label_gu = manage (new Gtk::Label);
 328     label_gu->set_markup (_("<b>Snapping to guides</b>"));
 329     Gtk::Label *label_m = manage (new Gtk::Label);
 330     label_m->set_markup (_("<b>Miscellaneous</b>"));
 331
 332     Gtk::Widget *const array[] =
 333     {
 334         label_g,            0,
 335         0,                  _rcbsnn._button,
 336         0,                  _rcbsnbb._button,
 337         0,                                      0,
 338         0,                  0,
 339         0,                                      0,
 340         0,                                      0,
 341         label_o,            0,
 342         0,                                      _rcbsnop._button,
 343         0,                                      _rcbsnon._button,
 344         0,                  _rcbsnbbp._button,
 345         0,                  _rcbsnbbn._button,
 346         0,                  _rsu_sno._vbox,
 347         0,                                      0,
 348         label_gr,           0,
 349         0,                  _rsu_sn._vbox,
 350         0,                                      0,
 351         label_gu,               0,
 352         0,                      _rsu_gusn._vbox
 353     };
 354
 355     attach_all(_page_snap.table(), array, G_N_ELEMENTS(array));
 356  }
 357
 358 void
 359 DocumentProperties::build_snap_dtls()
 360 {
 361     _page_snap_dtls.show();
 362
 363     _rcbsng.init (_("_Snap guides while dragging"),
 364                 _("While dragging a guide, snap to object nodes or bounding box corners ('snap to nodes' or 'snap to bounding box corners', both on the previous tab, must be enabled)"),
 365                 "inkscape:snap-guide", _wr);
 366
 367     _rcbic.init (_("_Include the object's rotation center"),
 368                 _("Also snap the rotation center of an object when snapping nodes or guides"),
 369                 "inkscape:snap-center", _wr);
 370     //Applies to both nodes and guides, but not to bboxes, that's why its located here
 371
 372     //Other options to locate here: e.g. visual snapping indicators on/off
 373
 374     Gtk::Label *label_i= manage (new Gtk::Label);
 375     label_i->set_markup (_("<b>Snapping to intersections</b>"));
 376     Gtk::Label *label_m = manage (new Gtk::Label);
 377     label_m->set_markup (_("<b>Miscellaneous</b>"));
 378
 379     Gtk::Widget *const array[] =
 380     {
 381         label_i,            0,
 382         0,                  0,
 383         0,                  0,
 384         label_m,            0,
 385         0,                  _rcbsng._button,
 386         0,                  _rcbic._button,
 387     };
 388
 389     attach_all(_page_snap_dtls.table(), array, G_N_ELEMENTS(array));
 390 }
 391
 392 /**
 393 * Called for _updating_ the dialog (e.g. when a new grid was manually added in XML)
 394 */
 395 void
 396 DocumentProperties::update_gridspage()
 397 {
 398     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 399     SPNamedView *nv = sp_desktop_namedview(dt);
 400
 401     //remove all tabs
 402     while (_grids_notebook.get_current_page() != -1) {
 403         _grids_notebook.remove_page(-1);
 404     }
 405
 406     //add tabs
 407     for (GSList const * l = nv->grids; l != NULL; l = l->next) {
 408         Inkscape::CanvasGrid * grid = (Inkscape::CanvasGrid*) l->data;
 409         _grids_notebook.append_page(grid->getWidget(), grid->repr->attribute("id"));
 410
 411     }
 412     _grids_notebook.show_all();
 413
 414     _page_grids.table().resize_children();
 415 }
 416
 417 /**
 418  * Build grid page of dialog.
 419  */
 420 void
 421 DocumentProperties::build_gridspage()
 422 {
 423     _page_grids.show();
 424
 425     /// \todo FIXME: gray out snapping when grid is off.
 426     /// Dissenting view: you want snapping without grid.
 427
 428     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 429     SPNamedView *nv = sp_desktop_namedview(dt);
 430
 431     Gtk::Label* label_crea = manage (new Gtk::Label);
 432     label_crea->set_markup (_("<b>Creation</b>"));
 433     Gtk::Label* label_crea_type = manage (new Gtk::Label);
 434     label_crea_type->set_markup (_("Gridtype"));
 435
 436     for (gint t = 0; t <= GRID_MAXTYPENR; t++) {
 437         _grids_combo_gridtype.append_text( CanvasGrid::getName( (GridType) t ) );
 438     }
 439     _grids_combo_gridtype.set_active_text( CanvasGrid::getName(GRID_RECTANGULAR) );
 440
 441     Gtk::Label* label_def = manage (new Gtk::Label);
 442     label_def->set_markup (_("<b>Defined grids</b>"));
 443
 444     for (GSList const * l = nv->grids; l != NULL; l = l->next) {
 445         Inkscape::CanvasGrid * grid = (Inkscape::CanvasGrid*) l->data;
 446         _grids_notebook.append_page(grid->getWidget(), grid->repr->attribute("id"));
 447     }
 448
 449     Gtk::Widget *const widget_array[] =
 450     {
 451         label_crea, 0,
 452         label_crea_type, (Gtk::Widget*) &_grids_combo_gridtype,
 453         (Gtk::Widget*) &_grids_button_new,         (Gtk::Widget*) &_grids_button_remove,
 454         label_def,         0
 455     };
 456     attach_all(_page_grids.table(), widget_array, G_N_ELEMENTS(widget_array));
 457     _page_grids.table().attach(_grids_notebook, 0, 3, 4, 5,
 458                                Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
 459 }
 460
 461
 462
 463 /**
 464  * Update dialog widgets from desktop. Also call updateWidget routines of the grids.
 465  */
 466 void
 467 DocumentProperties::update()
 468 {
 469     if (_wr.isUpdating()) return;
 470
 471     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 472     SPNamedView *nv = sp_desktop_namedview(dt);
 473
 474     _wr.setUpdating (true);
 475     set_sensitive (true);
 476
 477     //-----------------------------------------------------------page page
 478     _rcp_bg.setRgba32 (nv->pagecolor);
 479     _rcb_canb.setActive (nv->showborder);
 480     _rcb_bord.setActive (nv->borderlayer == SP_BORDER_LAYER_TOP);
 481     _rcp_bord.setRgba32 (nv->bordercolor);
 482     _rcb_shad.setActive (nv->showpageshadow);
 483
 484     if (nv->doc_units)
 485         _rum_deflt.setUnit (nv->doc_units);
 486
 487     double const doc_w_px = sp_document_width(sp_desktop_document(dt));
 488     double const doc_h_px = sp_document_height(sp_desktop_document(dt));
 489     _page_sizer.setDim (doc_w_px, doc_h_px);
 490
 491     //-----------------------------------------------------------guide
 492     _rcb_sgui.setActive (nv->showguides);
 493     _rcp_gui.setRgba32 (nv->guidecolor);
 494     _rcp_hgui.setRgba32 (nv->guidehicolor);
 495
 496     //-----------------------------------------------------------snap
 497
 498     _rcbsnbb.setActive (nv->snap_manager.getSnapModeBBox());
 499     _rcbsnn.setActive (nv->snap_manager.getSnapModeNode());
 500     _rcbsng.setActive (nv->snap_manager.getSnapModeGuide());
 501     _rcbic.setActive (nv->snap_manager.getIncludeItemCenter());
 502     _rcbsnop.setActive(nv->snap_manager.object.getSnapToItemPath());
 503     _rcbsnon.setActive(nv->snap_manager.object.getSnapToItemNode());
 504     _rcbsnbbp.setActive(nv->snap_manager.object.getSnapToBBoxPath());
 505     _rcbsnbbn.setActive(nv->snap_manager.object.getSnapToBBoxNode());
 506     _rsu_sno.setValue (nv->objecttolerance);
 507
 508     _rsu_sn.setValue (nv->gridtolerance);
 509
 510     _rsu_gusn.setValue (nv->guidetolerance);
 511
 512     //-----------------------------------------------------------grids page
 513
 514     update_gridspage();
 515
 516     _wr.setUpdating (false);
 517 }
 518
 519 //--------------------------------------------------------------------
 520
 521 void
 522 DocumentProperties::on_response (int id)
 523 {
 524     if (id == Gtk::RESPONSE_DELETE_EVENT || id == Gtk::RESPONSE_CLOSE)
 525     {
 526         _rcp_bg.closeWindow();
 527         _rcp_bord.closeWindow();
 528         _rcp_gui.closeWindow();
 529         _rcp_hgui.closeWindow();
 530     }
 531
 532     if (id == Gtk::RESPONSE_CLOSE)
 533         hide();
 534 }
 535
 536
 537
 538 static void
 539 on_child_added(Inkscape::XML::Node */*repr*/, Inkscape::XML::Node */*child*/, Inkscape::XML::Node */*ref*/, void * /*data*/)
 540 {
 541     if (!_instance)
 542         return;
 543
 544     _instance->update_gridspage();
 545 }
 546
 547 static void
 548 on_child_removed(Inkscape::XML::Node */*repr*/, Inkscape::XML::Node */*child*/, Inkscape::XML::Node */*ref*/, void * /*data*/)
 549 {
 550     if (!_instance)
 551         return;
 552
 553     _instance->update_gridspage();
 554 }
 555
 556
 557
 558 /**
 559  * Called when XML node attribute changed; updates dialog widgets.
 560  */
 561 static void
 562 on_repr_attr_changed (Inkscape::XML::Node *, gchar const *, gchar const *, gchar const *, bool, gpointer)
 563 {
 564     if (!_instance)
 565         return;
 566
 567     _instance->update();
 568 }
 569
 570 static void
 571 on_activate_desktop (Inkscape::Application *, SPDesktop* /*dt*/, void*)
 572 {
 573     if (!_instance)
 574         return;
 575
 576     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 577     repr->addListener (&_repr_events, _instance);
 578     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 579     root->addListener (&_repr_events, _instance);
 580     _instance->_doc_replaced_connection = SP_ACTIVE_DESKTOP->connectDocumentReplaced (sigc::ptr_fun (on_doc_replaced));
 581     _instance->update();
 582 }
 583
 584 static void
 585 on_deactivate_desktop (Inkscape::Application *, SPDesktop* /*dt*/, void*)
 586 {
 587     if (!_instance)
 588         return;
 589
 590     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(SP_ACTIVE_DESKTOP));
 591     repr->removeListenerByData (_instance);
 592     Inkscape::XML::Node *root = SP_OBJECT_REPR(sp_desktop_document(SP_ACTIVE_DESKTOP)->root);
 593     root->removeListenerByData (_instance);
 594     _instance->_doc_replaced_connection.disconnect();
 595 }
 596
 597 static void
 598 on_doc_replaced (SPDesktop* dt, SPDocument* doc)
 599 {
 600     if (!_instance)
 601         return;
 602
 603     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(dt));
 604     repr->addListener (&_repr_events, _instance);
 605     Inkscape::XML::Node *root = SP_OBJECT_REPR(doc->root);
 606     root->addListener (&_repr_events, _instance);
 607     _instance->update();
 608 }
 609
 610
 611
 612
 613 /*########################################################################
 614 # BUTTON CLICK HANDLERS    (callbacks)
 615 ########################################################################*/
 616
 617 void
 618 DocumentProperties::onNewGrid()
 619 {
 620     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 621     Inkscape::XML::Node *repr = SP_OBJECT_REPR(sp_desktop_namedview(dt));
 622     SPDocument *doc = sp_desktop_document(dt);
 623
 624     Glib::ustring typestring = _grids_combo_gridtype.get_active_text();
 625     CanvasGrid::writeNewGridToRepr(repr, doc, CanvasGrid::getGridTypeFromName(typestring.c_str()));
 626 }
 627
 628
 629 void
 630 DocumentProperties::onRemoveGrid()
 631 {
 632     gint pagenum = _grids_notebook.get_current_page();
 633     if (pagenum == -1) // no pages
 634       return;
 635
 636     Gtk::Widget *page = _grids_notebook.get_nth_page(pagenum);
 637     if (!page) return;
 638
 639     Glib::ustring tabtext = _grids_notebook.get_tab_label_text(*page);
 640
 641     // find the grid with name tabtext (it's id) and delete that one.
 642     SPDesktop *dt = SP_ACTIVE_DESKTOP;
 643     SPNamedView *nv = sp_desktop_namedview(dt);
 644     Inkscape::CanvasGrid * found_grid = NULL;
 645     for (GSList const * l = nv->grids; l != NULL; l = l->next) {
 646         Inkscape::CanvasGrid * grid = (Inkscape::CanvasGrid*) l->data;
 647         gchar const *idtext = grid->repr->attribute("id");
 648         if ( !strcmp(tabtext.c_str(), idtext) ) {
 649             found_grid = grid;
 650             break; // break out of for-loop
 651         }
 652     }
 653     if (found_grid) {
 654         // delete the grid that corresponds with the selected tab
 655         // when the grid is deleted from SVG, the SPNamedview handler automatically deletes the object, so found_grid becomes an invalid pointer!
 656         found_grid->repr->parent()->removeChild(found_grid->repr);
 657         sp_document_done(sp_desktop_document(dt), SP_VERB_DIALOG_NAMEDVIEW, _("Remove grid"));
 658     }
 659 }
 660
 661
 662 } // namespace Dialog
 663 } // namespace UI
 664 } // namespace Inkscape
 665
 666 /*
 667   Local Variables:
 668   mode:c++
 669   c-file-style:"stroustrup"
 670   c-file-offsets:((innamespace . 0)(inline-open . 0))
 671   indent-tabs-mode:nilu
 672   fill-column:99
 673   End:
 674 */
 675 // vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :