synfig-studio/trunk/src/gtkmm/state_polygon.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file state_polygon.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007, 2008 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include <gtkmm/dialog.h>
  34 #include <gtkmm/entry.h>
  35
  36 #include <synfig/valuenode_dynamiclist.h>
  37 #include <synfigapp/action_system.h>
  38
  39 #include "state_polygon.h"
  40 #include "canvasview.h"
  41 #include "workarea.h"
  42 #include "app.h"
  43
  44 #include <synfigapp/action.h>
  45 #include "event_mouse.h"
  46 #include "event_layerclick.h"
  47 #include "toolbox.h"
  48 #include "dialog_tooloptions.h"
  49 #include <synfigapp/main.h>
  50
  51 #include "general.h"
  52
  53 #endif
  54
  55 /* === U S I N G =========================================================== */
  56
  57 using namespace std;
  58 using namespace etl;
  59 using namespace synfig;
  60 using namespace studio;
  61
  62 /* === M A C R O S ========================================================= */
  63
  64 /* === G L O B A L S ======================================================= */
  65
  66 StatePolygon studio::state_polygon;
  67
  68 /* === C L A S S E S & S T R U C T S ======================================= */
  69
  70 class studio::StatePolygon_Context : public sigc::trackable
  71 {
  72         etl::handle<CanvasView> canvas_view_;
  73         CanvasView::IsWorking is_working;
  74
  75         bool prev_table_status;
  76         bool prev_workarea_layer_status_;
  77
  78         Gtk::Menu menu;
  79
  80         Duckmatic::Push duckmatic_push;
  81
  82         std::list<synfig::Point> polygon_point_list;
  83         synfigapp::Settings& settings;
  84
  85
  86         bool on_polygon_duck_change(const synfig::Point &point, std::list<synfig::Point>::iterator iter);
  87
  88
  89         void popup_handle_menu(synfigapp::ValueDesc value_desc);
  90
  91
  92         void refresh_ducks();
  93
  94         Gtk::Table options_table;
  95         Gtk::Entry entry_id;
  96         Gtk::CheckButton checkbutton_invert;
  97         Gtk::CheckButton checkbutton_layer_polygon;
  98         Gtk::CheckButton checkbutton_layer_region;
  99         Gtk::CheckButton checkbutton_layer_outline;
 100         Gtk::CheckButton checkbutton_layer_curve_gradient;
 101         Gtk::CheckButton checkbutton_layer_plant;
 102         Gtk::CheckButton checkbutton_layer_link_origins;
 103         Gtk::Button button_make;
 104         Gtk::Adjustment  adj_feather;
 105         Gtk::SpinButton  spin_feather;
 106
 107 public:
 108
 109         // this counts the layers we create - they all have origins we can link
 110         int layers_to_create()const
 111         {
 112                 return
 113                         get_layer_polygon_flag() +
 114                         get_layer_region_flag() +
 115                         get_layer_outline_flag() +
 116                         get_layer_curve_gradient_flag() +
 117                         get_layer_plant_flag();
 118         }
 119
 120         synfig::String get_id()const { return entry_id.get_text(); }
 121         void set_id(const synfig::String& x) { return entry_id.set_text(x); }
 122
 123         bool get_invert()const { return checkbutton_invert.get_active(); }
 124         void set_invert(bool i) { checkbutton_invert.set_active(i); }
 125
 126         bool get_layer_polygon_flag()const { return checkbutton_layer_polygon.get_active(); }
 127         void set_layer_polygon_flag(bool x) { return checkbutton_layer_polygon.set_active(x); }
 128
 129         bool get_layer_region_flag()const { return checkbutton_layer_region.get_active(); }
 130         void set_layer_region_flag(bool x) { return checkbutton_layer_region.set_active(x); }
 131
 132         bool get_layer_outline_flag()const { return checkbutton_layer_outline.get_active(); }
 133         void set_layer_outline_flag(bool x) { return checkbutton_layer_outline.set_active(x); }
 134
 135         bool get_layer_curve_gradient_flag()const { return checkbutton_layer_curve_gradient.get_active(); }
 136         void set_layer_curve_gradient_flag(bool x) { return checkbutton_layer_curve_gradient.set_active(x); }
 137
 138         bool get_layer_plant_flag()const { return checkbutton_layer_plant.get_active(); }
 139         void set_layer_plant_flag(bool x) { return checkbutton_layer_plant.set_active(x); }
 140
 141         bool get_layer_link_origins_flag()const { return checkbutton_layer_link_origins.get_active(); }
 142         void set_layer_link_origins_flag(bool x) { return checkbutton_layer_link_origins.set_active(x); }
 143
 144         Real get_feather() const { return adj_feather.get_value(); }
 145         void set_feather(Real x) { return adj_feather.set_value(x); }
 146
 147         Smach::event_result event_stop_handler(const Smach::event& x);
 148
 149         Smach::event_result event_refresh_handler(const Smach::event& x);
 150
 151         Smach::event_result event_mouse_click_handler(const Smach::event& x);
 152         Smach::event_result event_refresh_tool_options(const Smach::event& x);
 153         void refresh_tool_options();
 154
 155         StatePolygon_Context(CanvasView* canvas_view);
 156
 157         ~StatePolygon_Context();
 158
 159         const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
 160         etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
 161         synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
 162         WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
 163
 164         //void on_user_click(synfig::Point point);
 165         void load_settings();
 166         void save_settings();
 167         void reset();
 168         void increment_id();
 169         bool egress_on_selection_change;
 170         Smach::event_result event_layer_selection_changed_handler(const Smach::event& /*x*/)
 171         {
 172                 if(egress_on_selection_change)
 173                         throw Smach::egress_exception();
 174                 return Smach::RESULT_OK;
 175         }
 176
 177         void run();
 178 };      // END of class StatePolygon_Context
 179
 180 /* === M E T H O D S ======================================================= */
 181
 182 StatePolygon::StatePolygon():
 183         Smach::state<StatePolygon_Context>("polygon")
 184 {
 185         insert(event_def(EVENT_LAYER_SELECTION_CHANGED,&StatePolygon_Context::event_layer_selection_changed_handler));
 186         insert(event_def(EVENT_STOP,&StatePolygon_Context::event_stop_handler));
 187         insert(event_def(EVENT_REFRESH,&StatePolygon_Context::event_refresh_handler));
 188         insert(event_def(EVENT_REFRESH_DUCKS,&StatePolygon_Context::event_refresh_handler));
 189         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DOWN,&StatePolygon_Context::event_mouse_click_handler));
 190         insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StatePolygon_Context::event_refresh_tool_options));
 191 }
 192
 193 StatePolygon::~StatePolygon()
 194 {
 195 }
 196
 197 void
 198 StatePolygon_Context::load_settings()
 199 {
 200         String value;
 201
 202         if(settings.get_value("polygon.id",value))
 203                 set_id(value);
 204         else
 205                 set_id("Polygon");
 206
 207         if(settings.get_value("polygon.invert",value) && value != "0")
 208                 set_invert(true);
 209         else
 210                 set_invert(false);
 211
 212         if(settings.get_value("polygon.layer_polygon",value) && value=="0")
 213                 set_layer_polygon_flag(false);
 214         else
 215                 set_layer_polygon_flag(true);
 216
 217         if(settings.get_value("polygon.layer_region",value) && value=="1")
 218                 set_layer_region_flag(true);
 219         else
 220                 set_layer_region_flag(false);
 221
 222         if(settings.get_value("polygon.layer_outline",value) && value=="1")
 223                 set_layer_outline_flag(true);
 224         else
 225                 set_layer_outline_flag(false);
 226
 227         if(settings.get_value("polygon.layer_curve_gradient",value) && value=="1")
 228                 set_layer_curve_gradient_flag(true);
 229         else
 230                 set_layer_curve_gradient_flag(false);
 231
 232         if(settings.get_value("polygon.layer_plant",value) && value=="1")
 233                 set_layer_plant_flag(true);
 234         else
 235                 set_layer_plant_flag(false);
 236
 237         if(settings.get_value("polygon.layer_link_origins",value) && value=="0")
 238                 set_layer_link_origins_flag(false);
 239         else
 240                 set_layer_link_origins_flag(true);
 241
 242         if(settings.get_value("polygon.feather",value))
 243         {
 244                 Real n = atof(value.c_str());
 245                 set_feather(n);
 246         }
 247 }
 248
 249 void
 250 StatePolygon_Context::save_settings()
 251 {
 252         settings.set_value("polygon.id",get_id().c_str());
 253         settings.set_value("polygon.invert",get_invert()?"1":"0");
 254         settings.set_value("polygon.layer_polygon",get_layer_polygon_flag()?"1":"0");
 255         settings.set_value("polygon.layer_outline",get_layer_outline_flag()?"1":"0");
 256         settings.set_value("polygon.layer_region",get_layer_region_flag()?"1":"0");
 257         settings.set_value("polygon.layer_curve_gradient",get_layer_curve_gradient_flag()?"1":"0");
 258         settings.set_value("polygon.layer_plant",get_layer_plant_flag()?"1":"0");
 259         settings.set_value("polygon.layer_link_origins",get_layer_link_origins_flag()?"1":"0");
 260         settings.set_value("polygon.feather",strprintf("%f",get_feather()));
 261 }
 262
 263 void
 264 StatePolygon_Context::reset()
 265 {
 266         polygon_point_list.clear();
 267         refresh_ducks();
 268 }
 269
 270 void
 271 StatePolygon_Context::increment_id()
 272 {
 273         String id(get_id());
 274         int number=1;
 275         int digits=0;
 276
 277         if(id.empty())
 278                 id="Polygon";
 279
 280         // If there is a number
 281         // already at the end of the
 282         // id, then remove it.
 283         if(id[id.size()-1]<='9' && id[id.size()-1]>='0')
 284         {
 285                 // figure out how many digits it is
 286                 for (digits = 0;
 287                          (int)id.size()-1 >= digits && id[id.size()-1-digits] <= '9' && id[id.size()-1-digits] >= '0';
 288                          digits++)
 289                         ;
 290
 291                 String str_number;
 292                 str_number=String(id,id.size()-digits,id.size());
 293                 id=String(id,0,id.size()-digits);
 294
 295                 number=atoi(str_number.c_str());
 296         }
 297         else
 298         {
 299                 number=1;
 300                 digits=3;
 301         }
 302
 303         number++;
 304
 305         // Add the number back onto the id
 306         {
 307                 const String format(strprintf("%%0%dd",digits));
 308                 id+=strprintf(format.c_str(),number);
 309         }
 310
 311         // Set the ID
 312         set_id(id);
 313 }
 314
 315 StatePolygon_Context::StatePolygon_Context(CanvasView* canvas_view):
 316         canvas_view_(canvas_view),
 317         is_working(*canvas_view),
 318         prev_workarea_layer_status_(get_work_area()->get_allow_layer_clicks()),
 319         duckmatic_push(get_work_area()),
 320         settings(synfigapp::Main::get_selected_input_device()->settings()),
 321         entry_id(),
 322         checkbutton_invert(_("Invert")),
 323         checkbutton_layer_polygon(_("Create Polygon Layer")),
 324         checkbutton_layer_region(_("Create Region BLine")),
 325         checkbutton_layer_outline(_("Create Outline BLine")),
 326         checkbutton_layer_curve_gradient(_("Create Curve Gradient BLine")),
 327         checkbutton_layer_plant(_("Create Plant BLine")),
 328         checkbutton_layer_link_origins(_("Link Origins")),
 329         button_make(_("Make")),
 330         adj_feather(0,0,10000,0.01,0.1),
 331         spin_feather(adj_feather,0.01,4)
 332 {
 333         egress_on_selection_change=true;
 334         load_settings();
 335
 336         // Set up the tool options dialog
 337         options_table.attach(*manage(new Gtk::Label(_("Polygon Tool"))),        0, 2, 0,  1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 338         options_table.attach(entry_id,                                                                          0, 2, 1,  2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 339
 340         options_table.attach(checkbutton_layer_polygon,                                         0, 2, 2,  3, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 341         options_table.attach(checkbutton_layer_outline,                                         0, 2, 3,  4, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 342         options_table.attach(checkbutton_layer_region,                                          0, 2, 4,  5, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 343         options_table.attach(checkbutton_layer_plant,                                           0, 2, 5,  6, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 344         options_table.attach(checkbutton_layer_curve_gradient,                          0, 2, 6,  7, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 345         options_table.attach(checkbutton_layer_link_origins,                            0, 2, 7,  8, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 346
 347         //invert flag
 348         options_table.attach(checkbutton_invert,                                                        0, 2, 8,  9, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 349
 350         //feather stuff
 351         options_table.attach(*manage(new Gtk::Label(_("Feather"))),             0, 1, 9, 10, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 352         options_table.attach(spin_feather,                                                                      1, 2, 9, 10, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 353
 354         //options_table.attach(button_make, 0, 2, 4, 5, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 355         button_make.signal_pressed().connect(sigc::mem_fun(*this,&StatePolygon_Context::run));
 356         options_table.show_all();
 357         refresh_tool_options();
 358         App::dialog_tool_options->present();
 359
 360
 361         // Turn off layer clicking
 362         get_work_area()->set_allow_layer_clicks(false);
 363
 364         // clear out the ducks
 365         get_work_area()->clear_ducks();
 366
 367         // Refresh the work area
 368         get_work_area()->queue_draw();
 369
 370         get_canvas_view()->work_area->set_cursor(Gdk::CROSSHAIR);
 371
 372         // Hide the tables if they are showing
 373         prev_table_status=get_canvas_view()->tables_are_visible();
 374         if(prev_table_status)get_canvas_view()->hide_tables();
 375
 376         // Disable the time bar
 377         get_canvas_view()->set_sensitive_timebar(false);
 378
 379         // Connect a signal
 380         //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StatePolygon_Context::on_user_click));
 381
 382         App::toolbox->refresh();
 383 }
 384
 385 void
 386 StatePolygon_Context::refresh_tool_options()
 387 {
 388         App::dialog_tool_options->clear();
 389         App::dialog_tool_options->set_widget(options_table);
 390
 391         App::dialog_tool_options->set_local_name(_("Polygon Tool"));
 392         App::dialog_tool_options->set_name("polygon");
 393
 394         App::dialog_tool_options->add_button(
 395                 Gtk::StockID("gtk-execute"),
 396                 _("Make Polygon")
 397         )->signal_clicked().connect(
 398                 sigc::mem_fun(
 399                         *this,
 400                         &StatePolygon_Context::run
 401                 )
 402         );
 403
 404         App::dialog_tool_options->add_button(
 405                 Gtk::StockID("gtk-clear"),
 406                 _("Clear current Polygon")
 407         )->signal_clicked().connect(
 408                 sigc::mem_fun(
 409                         *this,
 410                         &StatePolygon_Context::reset
 411                 )
 412         );
 413 }
 414
 415 Smach::event_result
 416 StatePolygon_Context::event_refresh_tool_options(const Smach::event& /*x*/)
 417 {
 418         refresh_tool_options();
 419         return Smach::RESULT_ACCEPT;
 420 }
 421
 422 StatePolygon_Context::~StatePolygon_Context()
 423 {
 424         run();
 425
 426         save_settings();
 427         // Restore layer clicking
 428         get_work_area()->set_allow_layer_clicks(prev_workarea_layer_status_);
 429
 430         App::dialog_tool_options->clear();
 431
 432         get_canvas_view()->work_area->reset_cursor();
 433
 434         // Enable the time bar
 435         get_canvas_view()->set_sensitive_timebar(true);
 436
 437         // Bring back the tables if they were out before
 438         if(prev_table_status)get_canvas_view()->show_tables();
 439
 440         // Refresh the work area
 441         get_work_area()->queue_draw();
 442
 443         App::toolbox->refresh();
 444 }
 445
 446 Smach::event_result
 447 StatePolygon_Context::event_stop_handler(const Smach::event& /*x*/)
 448 {
 449         synfig::info("STATE RotoPolygon: Received Stop Event");
 450         //throw Smach::egress_exception();
 451         reset();
 452         return Smach::RESULT_ACCEPT;
 453
 454 }
 455
 456 Smach::event_result
 457 StatePolygon_Context::event_refresh_handler(const Smach::event& /*x*/)
 458 {
 459         synfig::info("STATE RotoPolygon: Received Refresh Event");
 460         refresh_ducks();
 461         return Smach::RESULT_ACCEPT;
 462 }
 463
 464 void
 465 StatePolygon_Context::run()
 466 {
 467         if(polygon_point_list.empty())
 468                 return;
 469
 470         if(polygon_point_list.size()<3)
 471         {
 472                 get_canvas_view()->get_ui_interface()->error("You need at least 3 points to create a polygon");
 473                 return;
 474         }
 475                 Layer::Handle layer;
 476                 Canvas::Handle canvas(get_canvas_view()->get_canvas());
 477                 int depth(0);
 478
 479                 // we are temporarily using the layer to hold something
 480                 layer=get_canvas_view()->get_selection_manager()->get_selected_layer();
 481                 if(layer)
 482                 {
 483                         depth=layer->get_depth();
 484                         canvas=layer->get_canvas();
 485                 }
 486
 487                 {
 488                         synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("New Polygon"));
 489                         synfigapp::PushMode push_mode(get_canvas_interface(),synfigapp::MODE_NORMAL);
 490
 491                         Layer::Handle layer(get_canvas_interface()->add_layer_to("polygon",canvas,depth));
 492
 493                         layer->set_param("invert",get_invert());
 494                         get_canvas_interface()->signal_layer_param_changed()(layer,"invert");
 495
 496                         if(get_feather())
 497                         {
 498                                 layer->set_param("feather",get_feather());
 499                                 get_canvas_interface()->signal_layer_param_changed()(layer,"feather");
 500                         }
 501
 502                         layer->set_description(get_id());
 503                         get_canvas_interface()->signal_layer_new_description()(layer,layer->get_description());
 504
 505                         layer->disconnect_dynamic_param("vector_list");
 506                         if(!layer->set_param("vector_list",polygon_point_list))
 507                         {
 508                                 group.cancel();
 509                                 get_canvas_view()->get_ui_interface()->error("Unable to set layer parameter");
 510                                 return;
 511                         }
 512
 513                         {
 514                                 synfigapp::Action::Handle action(synfigapp::Action::create("value_desc_convert"));
 515                                 synfigapp::ValueDesc value_desc(layer,"vector_list");
 516                                 action->set_param("canvas",get_canvas());
 517                                 action->set_param("canvas_interface",get_canvas_interface());
 518                                 action->set_param("value_desc",value_desc);
 519                                 action->set_param("type","dynamic_list");
 520                                 action->set_param("time",get_canvas_interface()->get_time());
 521                                 if(!get_canvas_interface()->get_instance()->perform_action(action))
 522                                 {
 523                                         group.cancel();
 524                                         get_canvas_view()->get_ui_interface()->error("Unable to execute action \"value_desc_convert\"");
 525                                         return;
 526                                 }
 527                         }
 528                         egress_on_selection_change=false;
 529                         synfigapp::SelectionManager::LayerList layer_selection;
 530                         if (!getenv("SYNFIG_TOOLS_CLEAR_SELECTION"))
 531                                 layer_selection = get_canvas_view()->get_selection_manager()->get_selected_layers();
 532                         get_canvas_interface()->get_selection_manager()->clear_selected_layers();
 533                         layer_selection.push_back(layer);
 534                         get_canvas_interface()->get_selection_manager()->set_selected_layers(layer_selection);
 535                         egress_on_selection_change=true;
 536                         //get_canvas_interface()->signal_dirty_preview()();
 537                 }
 538 /*
 539                 else
 540                 {
 541                         ValueNode::Handle value_node=(ValueNode_Const::create(polygon_point_list));
 542                         std::string valuenode_name="Poly";
 543                         while(studio::App::dialog_entry("New Polygon", "Please enter the new ID for this value_node",valuenode_name))
 544                                 if(get_canvas_interface()->add_value_node(value_node,valuenode_name))
 545                                         return true;
 546                 }
 547 */
 548         reset();
 549         increment_id();
 550 }
 551
 552 Smach::event_result
 553 StatePolygon_Context::event_mouse_click_handler(const Smach::event& x)
 554 {
 555         synfig::info("STATE ROTOPOLYGON: Received mouse button down Event");
 556         const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
 557         switch(event.button)
 558         {
 559         case BUTTON_LEFT:
 560                 polygon_point_list.push_back(get_work_area()->snap_point_to_grid(event.pos));
 561                 refresh_ducks();
 562                 return Smach::RESULT_ACCEPT;
 563
 564         case BUTTON_RIGHT: // Intercept the right-button click to short-circuit the pop-up menu
 565                 if (!getenv("SYNFIG_ENABLE_POPUP_MENU_IN_ALL_TOOLS"))
 566                         return Smach::RESULT_ACCEPT;
 567
 568         default:
 569                 return Smach::RESULT_OK;
 570         }
 571 }
 572
 573
 574 void
 575 StatePolygon_Context::refresh_ducks()
 576 {
 577         get_work_area()->clear_ducks();
 578
 579         if(polygon_point_list.empty()) return;
 580
 581         std::list<synfig::Point>::iterator iter=polygon_point_list.begin();
 582
 583         etl::handle<WorkArea::Duck> duck;
 584         duck=new WorkArea::Duck(*iter);
 585         duck->set_editable(true);
 586         duck->signal_edited().connect(
 587                 sigc::bind(sigc::mem_fun(*this,&studio::StatePolygon_Context::on_polygon_duck_change),iter)
 588         );
 589         duck->signal_user_click(0).connect(sigc::mem_fun(*this,&StatePolygon_Context::run));
 590
 591         get_work_area()->add_duck(duck);
 592
 593         for(++iter;iter!=polygon_point_list.end();++iter)
 594         {
 595                 etl::handle<WorkArea::Bezier> bezier(new WorkArea::Bezier());
 596                 bezier->p1=bezier->c1=duck;
 597
 598                 duck=new WorkArea::Duck(*iter);
 599                 duck->set_editable(true);
 600                 duck->set_name(strprintf("%x",&*iter));
 601                 duck->signal_edited().connect(
 602                         sigc::bind(sigc::mem_fun(*this,&studio::StatePolygon_Context::on_polygon_duck_change),iter)
 603                 );
 604
 605                 get_work_area()->add_duck(duck);
 606
 607                 bezier->p2=bezier->c2=duck;
 608                 get_work_area()->add_bezier(bezier);
 609         }
 610         get_work_area()->queue_draw();
 611 }
 612
 613
 614 bool
 615 StatePolygon_Context::on_polygon_duck_change(const synfig::Point &point, std::list<synfig::Point>::iterator iter)
 616 {
 617         *iter=point;
 618         return true;
 619 }