synfig-studio/trunk/src/synfigapp/canvasinterface.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file canvasinterface.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 <iostream>
  34
  35 #include <ETL/clock>
  36 #include <synfig/valuenode_scale.h>
  37 #include <synfig/valuenode_timedswap.h>
  38 #include <synfig/valuenode_composite.h>
  39 #include <synfig/valuenode_subtract.h>
  40 #include <synfig/valuenode_linear.h>
  41 #include <synfig/valuenode_reference.h>
  42 #include <synfig/valuenode_twotone.h>
  43 #include <synfig/valuenode_stripes.h>
  44 #include <synfig/valuenode_bline.h>
  45
  46 #include <synfig/waypoint.h>
  47 #include <synfig/loadcanvas.h>
  48 #include <synfig/importer.h>
  49 #include <synfig/guidset.h>
  50
  51 #include "canvasinterface.h"
  52 #include "instance.h"
  53
  54 #include "actions/layeradd.h"
  55 #include "actions/valuedescconvert.h"
  56 #include "actions/valuenodeadd.h"
  57 #include "actions/editmodeset.h"
  58 #include "action_system.h"
  59
  60 #include "main.h"
  61
  62 #include <synfig/gradient.h>
  63
  64 #include "general.h"
  65
  66 #endif
  67
  68 /* === U S I N G =========================================================== */
  69
  70 using namespace std;
  71 using namespace etl;
  72 using namespace synfig;
  73 using namespace synfigapp;
  74
  75 /* === M A C R O S ========================================================= */
  76
  77 /* === G L O B A L S ======================================================= */
  78
  79 /* === P R O C E D U R E S ================================================= */
  80
  81 /* === M E T H O D S ======================================================= */
  82
  83 CanvasInterface::CanvasInterface(etl::loose_handle<Instance> instance,etl::handle<synfig::Canvas> canvas):
  84         instance_(instance),
  85         canvas_(canvas),
  86         cur_time_(canvas->rend_desc().get_frame_start()),
  87         mode_(MODE_NORMAL|MODE_ANIMATE_PAST|MODE_ANIMATE_FUTURE)
  88 {
  89         set_selection_manager(get_instance()->get_selection_manager());
  90         set_ui_interface(get_instance()->get_ui_interface());
  91 }
  92
  93 CanvasInterface::~CanvasInterface()
  94 {
  95         if (getenv("SYNFIG_DEBUG_DESTRUCTORS"))
  96                 synfig::info("CanvasInterface::~CanvasInterface(): Deleted");
  97 }
  98
  99 void
 100 CanvasInterface::set_time(synfig::Time x)
 101 {
 102         if(get_canvas()->rend_desc().get_frame_rate())
 103         {
 104                 float fps(get_canvas()->rend_desc().get_frame_rate());
 105                 Time r(x.round(fps));
 106                 //synfig::info("CanvasInterface::set_time(): %s rounded to %s\n",x.get_string(fps).c_str(),r.get_string(fps).c_str());
 107                 x=r;
 108         }
 109         if(cur_time_.is_equal(x))
 110                 return;
 111         get_canvas()->set_time(cur_time_=x);
 112
 113         // update the time in all the child canvases
 114         Canvas::Children children = get_canvas()->get_root()->children();
 115         handle<CanvasInterface> interface;
 116         for (Canvas::Children::iterator iter = children.begin(); iter != children.end(); iter++)
 117                 if ((interface = get_instance()->find_canvas_interface(*iter)) != this)
 118                         interface->set_time(interface->get_canvas()->get_time());
 119
 120         signal_time_changed()();
 121         signal_dirty_preview()();
 122 }
 123
 124 synfig::Time
 125 CanvasInterface::get_time()const
 126 {
 127         return cur_time_;
 128 }
 129
 130 void
 131 CanvasInterface::refresh_current_values()
 132 {
 133         get_canvas()->set_time(cur_time_);
 134         signal_time_changed()();
 135         signal_dirty_preview()();
 136 }
 137
 138 etl::handle<CanvasInterface>
 139 CanvasInterface::create(etl::loose_handle<Instance> instance, etl::handle<synfig::Canvas> canvas)
 140 {
 141         etl::handle<CanvasInterface> intrfc;
 142         intrfc=new CanvasInterface(instance,canvas);
 143         instance->canvas_interface_list().push_front(intrfc);
 144         return intrfc;
 145 }
 146
 147 void
 148 CanvasInterface::set_mode(Mode x)
 149 {
 150         Action::Handle  action(Action::EditModeSet::create());
 151
 152         assert(action);
 153
 154         action->set_param("canvas",get_canvas());
 155         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 156         action->set_param("edit_mode",x);
 157
 158         if(!action->is_ready())
 159         {
 160                 get_ui_interface()->error(_("Action Not Ready, unable to change mode"));
 161                 assert(0);
 162                 return;
 163         }
 164
 165         if(!get_instance()->perform_action(action))
 166                 get_ui_interface()->error(_("Unable to change mode"));
 167
 168 //      mode_=x;
 169 //      signal_mode_changed_(x);
 170 }
 171
 172 CanvasInterface::Mode
 173 CanvasInterface::get_mode()const
 174 {
 175         return mode_;
 176 }
 177
 178
 179
 180 Layer::Handle
 181 CanvasInterface::add_layer_to(synfig::String name, synfig::Canvas::Handle canvas, int depth)
 182 {
 183         synfigapp::Action::PassiveGrouper group(get_instance().get(),_("Add Layer To"));
 184
 185         Layer::Handle   layer(Layer::create(name));
 186
 187         assert(layer);
 188
 189         if(!layer)
 190                 return 0;
 191
 192         if(canvas!=get_canvas() && !canvas->is_inline())
 193         {
 194                 synfig::error("Bad canvas passed to \"add_layer_to\"");
 195                 return 0;
 196         }
 197
 198         // automatically export the Index parameter of new Duplicate layers
 199         if (name == "duplicate")
 200                 for (int i = 1; ; i++)
 201                 {
 202                         String name = strprintf(_("Index %d"), i);
 203                         try
 204                         {
 205                                 canvas->find_value_node(name);
 206                         }
 207                         catch (Exception::IDNotFound x)
 208                         {
 209                                 add_value_node(layer->dynamic_param_list().find("index")->second, name);
 210                                 break;
 211                         }
 212                 }
 213
 214         layer->set_canvas(canvas);
 215
 216         // Apply some defaults
 217         if(layer->set_param("fg",synfigapp::Main::get_foreground_color()))
 218                 layer->set_param("bg",synfigapp::Main::get_background_color());
 219         else
 220                 layer->set_param("color",synfigapp::Main::get_foreground_color());
 221
 222         layer->set_param("width",synfigapp::Main::get_bline_width().units(get_canvas()->rend_desc()));
 223         layer->set_param("gradient",synfigapp::Main::get_gradient());
 224         if(name!="zoom")
 225                 layer->set_param("amount",synfigapp::Main::get_opacity());
 226         layer->set_param("blend_method",synfigapp::Main::get_blend_method());
 227
 228         {
 229                 // Grab the layer's list of parameters
 230                 Layer::ParamList paramlist=layer->get_param_list();
 231                 Layer::ParamList::iterator iter;
 232
 233                 // loop through the static parameters
 234                 for(iter=paramlist.begin();iter!=paramlist.end();++iter)
 235                 {
 236                         ValueNode::Handle value_node;
 237
 238                         // if we find any which are list values then make them
 239                         // into dynamic list valuenodes, unless every element of
 240                         // the list is a blinepoint, in which case convert it to a
 241                         // bline
 242                         if(iter->second.get_type()==ValueBase::TYPE_LIST)
 243                         {
 244                                 // check whether it's a list of blinepoints only
 245                                 vector<ValueBase> list(iter->second.get_list());
 246                                 if (list.size())
 247                                 {
 248                                         vector<ValueBase>::iterator iter2;
 249                                         for (iter2 = list.begin(); iter2 != list.end(); iter2++)
 250                                                 if (iter2->get_type() != ValueBase::TYPE_BLINEPOINT)
 251                                                         break;
 252                                         if (iter2 == list.end())
 253                                         {
 254                                                 value_node=LinkableValueNode::create("bline",iter->second);
 255                                                 ValueNode_BLine::Handle::cast_dynamic(value_node)->set_member_canvas(canvas);
 256                                         }
 257                                 }
 258
 259                                 if (!value_node)
 260                                         value_node=LinkableValueNode::create("dynamic_list",iter->second);
 261                         }
 262                         // otherwise, if it's a type that can be converted to
 263                         // 'composite' (other than the types that can be radial
 264                         // composite) then do so
 265                         else if(LinkableValueNode::check_type("composite",iter->second.get_type()) &&
 266                                          (iter->second.get_type()!=ValueBase::TYPE_COLOR &&
 267                                           iter->second.get_type()!=ValueBase::TYPE_VECTOR))
 268                                 value_node=LinkableValueNode::create("composite",iter->second);
 269
 270                         if(value_node)
 271                                 layer->connect_dynamic_param(iter->first,value_node);
 272                 }
 273         }
 274
 275         // Action to add the layer
 276         Action::Handle  action(Action::LayerAdd::create());
 277
 278         assert(action);
 279         if(!action)
 280                 return 0;
 281
 282         action->set_param("canvas",canvas);
 283         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 284         action->set_param("new",layer);
 285
 286         if(!action->is_ready())
 287         {
 288                 get_ui_interface()->error(_("Action Not Ready"));
 289                 return 0;
 290         }
 291
 292         if(!get_instance()->perform_action(action))
 293         {
 294                 get_ui_interface()->error(_("Action Failed."));
 295                 return 0;
 296         }
 297
 298         // synfig::info("DEPTH=%d",depth);
 299
 300         // Action to move the layer (if necessary)
 301         if(depth>0)
 302         {
 303                 Action::Handle  action(Action::create("layer_move"));
 304
 305                 assert(action);
 306                 if(!action)
 307                         return 0;
 308
 309                 action->set_param("canvas",canvas);
 310                 action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 311                 action->set_param("layer",layer);
 312                 action->set_param("new_index",depth);
 313
 314                 if(!action->is_ready())
 315                 {
 316                         get_ui_interface()->error(_("Move Action Not Ready"));
 317                         return 0;
 318                 }
 319
 320                 if(!get_instance()->perform_action(action))
 321                 {
 322                         get_ui_interface()->error(_("Move Action Failed."));
 323                         return 0;
 324                 }
 325         }
 326
 327
 328         return layer;
 329 }
 330
 331
 332 bool
 333 CanvasInterface::convert(ValueDesc value_desc, synfig::String type)
 334 {
 335         Action::Handle  action(Action::ValueDescConvert::create());
 336
 337         assert(action);
 338         if(!action)
 339                 return 0;
 340
 341         action->set_param("canvas",get_canvas());
 342         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 343         action->set_param("value_desc",value_desc);
 344         action->set_param("type",type);
 345         action->set_param("time",get_time());
 346
 347         if(!action->is_ready())
 348         {
 349                 get_ui_interface()->error(_("Action Not Ready"));
 350                 return 0;
 351         }
 352
 353         if(get_instance()->perform_action(action))
 354                 return true;
 355
 356         get_ui_interface()->error(_("Action Failed."));
 357         return false;
 358 }
 359
 360 bool
 361 CanvasInterface::add_value_node(synfig::ValueNode::Handle value_node, synfig::String name)
 362 {
 363         if(name.empty())
 364         {
 365                 get_ui_interface()->error(_("Empty name!"));
 366                 return false;
 367         }
 368
 369         Action::Handle  action(Action::ValueNodeAdd::create());
 370
 371         assert(action);
 372         if(!action)
 373                 return 0;
 374
 375         action->set_param("canvas",get_canvas());
 376         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 377         action->set_param("new",value_node);
 378         action->set_param("name",name);
 379
 380         if(!action->is_ready())
 381         {
 382                 get_ui_interface()->error(_("Action Not Ready"));
 383                 return 0;
 384         }
 385
 386         if(get_instance()->perform_action(action))
 387                 return true;
 388
 389         get_ui_interface()->error(_("Action Failed."));
 390         return false;
 391 }
 392
 393 Action::ParamList
 394 CanvasInterface::generate_param_list(const ValueDesc &value_desc)
 395 {
 396         synfigapp::Action::ParamList param_list;
 397         param_list.add("time",get_time());
 398         param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
 399         param_list.add("canvas",get_canvas());
 400
 401         param_list.add("value_desc",value_desc);
 402
 403         if(value_desc.parent_is_value_node())
 404                 param_list.add("parent_value_node",value_desc.get_parent_value_node());
 405
 406         if(value_desc.is_value_node())
 407                 param_list.add("value_node",value_desc.get_value_node());
 408
 409         if(value_desc.is_const())
 410         {
 411                 // Fix 1868911: if we put a ValueBase holding a Canvas handle
 412                 // into the param_list and then export the canvas, the handle
 413                 // will miss out of having its reference count reduced,
 414                 // because by the time the handle is destructed the canvas
 415                 // will no longer be inline.  So let's not propogate that
 416                 // ValueBase any further than here.
 417                 if (value_desc.get_value_type() == ValueBase::TYPE_CANVAS)
 418                         param_list.add("value",Canvas::LooseHandle(value_desc.get_value().get(Canvas::LooseHandle())));
 419                 else
 420                         param_list.add("value",value_desc.get_value());
 421         }
 422
 423         if(value_desc.parent_is_layer_param())
 424         {
 425                 param_list.add("parent_layer",value_desc.get_layer());
 426                 param_list.add("parent_layer_param",value_desc.get_param_name());
 427         }
 428
 429         {
 430                 synfigapp::SelectionManager::ChildrenList children_list;
 431                 children_list=get_selection_manager()->get_selected_children();
 432                 if(!value_desc.parent_is_canvas() && children_list.size()==1)
 433                 {
 434                         param_list.add("dest",value_desc);
 435                         param_list.add("src",children_list.front().get_value_node());
 436                 }
 437         }
 438         return param_list;
 439 }
 440
 441 Action::ParamList
 442 CanvasInterface::generate_param_list(const std::list<synfigapp::ValueDesc> &value_desc_list)
 443 {
 444         synfigapp::Action::ParamList param_list;
 445         param_list.add("time",get_time());
 446         param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
 447         param_list.add("canvas",get_canvas());
 448
 449         std::list<synfigapp::ValueDesc>::const_iterator iter;
 450         for(iter=value_desc_list.begin();iter!=value_desc_list.end();++iter)
 451         {
 452                 param_list.add("value_desc",*iter);
 453                 if(iter->is_value_node())
 454                 {
 455                         param_list.add("value_node",iter->get_value_node());
 456                 }
 457         }
 458
 459
 460         return param_list;
 461 }
 462
 463 void
 464 CanvasInterface::set_rend_desc(const synfig::RendDesc &rend_desc)
 465 {
 466         Action::Handle  action(Action::create("canvas_rend_desc_set"));
 467
 468         assert(action);
 469         if(!action)
 470                 return;
 471
 472         action->set_param("canvas",get_canvas());
 473         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 474         action->set_param("rend_desc",rend_desc);
 475
 476         if(!get_instance()->perform_action(action))
 477                 get_ui_interface()->error(_("Action Failed."));
 478 }
 479
 480 void
 481 CanvasInterface::set_name(const synfig::String &x)
 482 {
 483         Action::Handle  action(Action::create("canvas_name_set"));
 484
 485         assert(action);
 486         if(!action)
 487                 return;
 488
 489         action->set_param("canvas",get_canvas());
 490         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 491         action->set_param("name",x);
 492
 493         if(!get_instance()->perform_action(action))
 494                 get_ui_interface()->error(_("Action Failed."));
 495
 496         signal_id_changed_();
 497 }
 498
 499 void
 500 CanvasInterface::set_description(const synfig::String &x)
 501 {
 502         Action::Handle  action(Action::create("canvas_description_set"));
 503
 504         assert(action);
 505         if(!action)
 506                 return;
 507
 508         action->set_param("canvas",get_canvas());
 509         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 510         action->set_param("description",x);
 511
 512         if(!get_instance()->perform_action(action))
 513                 get_ui_interface()->error(_("Action Failed."));
 514 }
 515
 516 void
 517 CanvasInterface::set_id(const synfig::String &x)
 518 {
 519         Action::Handle  action(Action::create("canvas_id_set"));
 520
 521         assert(action);
 522         if(!action)
 523                 return;
 524
 525         action->set_param("canvas",get_canvas());
 526         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 527         action->set_param("id",x);
 528
 529         if(!get_instance()->perform_action(action))
 530                 get_ui_interface()->error(_("Action Failed."));
 531
 532         signal_id_changed_();
 533 }
 534
 535
 536 void
 537 CanvasInterface::jump_to_next_keyframe()
 538 {
 539         synfig::info("Current time: %s",get_time().get_string().c_str());
 540         try
 541         {
 542                 synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_next(get_time()));
 543                 synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
 544                 set_time(keyframe.get_time());
 545         }
 546         catch(...) { synfig::warning("Unable to find next keyframe"); }
 547 }
 548
 549 void
 550 CanvasInterface::jump_to_prev_keyframe()
 551 {
 552         synfig::info("Current time: %s",get_time().get_string().c_str());
 553         try
 554         {
 555                 synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_prev(get_time()));
 556                 synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
 557                 set_time(keyframe.get_time());
 558         }
 559         catch(...) { synfig::warning("Unable to find prev keyframe"); }
 560 }
 561
 562 bool
 563 CanvasInterface::import(const synfig::String &filename, synfig::String &errors, synfig::String &warnings, bool resize_image)
 564 {
 565         Action::PassiveGrouper group(get_instance().get(),_("Import Image"));
 566
 567         synfig::info("Attempting to import "+filename);
 568
 569         if (filename_extension(filename) == "")
 570         {
 571                 get_ui_interface()->error(_("Filename must have an extension!"));
 572                 return false;
 573         }
 574
 575         String ext(filename_extension(filename));
 576         if (ext.size()) ext = ext.substr(1); // skip initial '.'
 577         std::transform(ext.begin(),ext.end(),ext.begin(),&::tolower);
 578
 579         // If this is a SIF file, then we need to do things slightly differently
 580         if(ext=="sif" || ext=="sifz")try
 581         {
 582                 Canvas::Handle outside_canvas(synfig::open_canvas(filename, errors, warnings));
 583                 if(!outside_canvas)
 584                         throw String(_("Unable to open this composition")) + ":\n\n" + errors;
 585
 586                 Layer::Handle layer(add_layer_to("PasteCanvas",get_canvas()));
 587                 if(!layer)
 588                         throw String(_("Unable to create \"Paste Canvas\" layer"));
 589                 if(!layer->set_param("canvas",ValueBase(outside_canvas)))
 590                         throw int();
 591
 592                 //layer->set_description(basename(filename));
 593                 signal_layer_new_description()(layer,filename);
 594                 return true;
 595         }
 596         catch(String x)
 597         {
 598                 get_ui_interface()->error(filename + ": " + x);
 599                 return false;
 600         }
 601         catch(...)
 602         {
 603                 get_ui_interface()->error(_("Uncaught exception when attempting\nto open this composition -- ")+filename);
 604                 return false;
 605         }
 606
 607         if(!Importer::book().count(ext))
 608         {
 609                 get_ui_interface()->error(_("I don't know how to open images of this type -- ")+ext);
 610                 return false;
 611         }
 612
 613         try
 614         {
 615                 Layer::Handle layer(add_layer_to("Import",get_canvas()));
 616                 int w,h;
 617                 if(!layer)
 618                         throw int();
 619                 if(!layer->set_param("filename",ValueBase(filename)))
 620                         throw int();
 621                 w=layer->get_param("_width").get(int());
 622                 h=layer->get_param("_height").get(int());
 623                 if(w&&h)
 624                 {
 625                         Vector x, size=ValueBase(get_canvas()->rend_desc().get_br()-get_canvas()->rend_desc().get_tl());
 626
 627                         // vector from top left of canvas to bottom right
 628                         if (resize_image)
 629                         {
 630                                 if(abs(size[0])<abs(size[1]))   // if canvas is tall and thin
 631                                 {
 632                                         x[0]=size[0];   // use full width
 633                                         x[1]=size[0]/w*h; // and scale for height
 634                                         if((size[0]<0) ^ (size[1]<0))
 635                                                 x[1]=-x[1];
 636                                 }
 637                                 else                            // else canvas is short and fat (or maybe square)
 638                                 {
 639                                         x[1]=size[1];   // use full height
 640                                         x[0]=size[1]/h*w; // and scale for width
 641                                         if((size[0]<0) ^ (size[1]<0))
 642                                                 x[0]=-x[0];
 643                                 }
 644                         }
 645                         else
 646                         {
 647                                 x[0] = w/60.0;
 648                                 x[1] = h/60.0;
 649                                 if((size[0]<0)) x[0]=-x[0];
 650                                 if((size[1]<0)) x[1]=-x[1];
 651                         }
 652
 653                         if(!layer->set_param("tl",ValueBase(-x/2)))
 654                                 throw int();
 655                         if(!layer->set_param("br",ValueBase(x/2)))
 656                                 throw int();
 657                 }
 658                 else
 659                 {
 660                         if(!layer->set_param("tl",ValueBase(get_canvas()->rend_desc().get_tl())))
 661                                 throw int();
 662                         if(!layer->set_param("br",ValueBase(get_canvas()->rend_desc().get_br())))
 663                                 throw int();
 664                 }
 665
 666                 layer->set_description(basename(filename));
 667                 signal_layer_new_description()(layer,filename);
 668
 669                 return true;
 670         }
 671         catch(...)
 672         {
 673                 get_ui_interface()->error("Unable to import "+filename);
 674                 group.cancel();
 675                 return false;
 676         }
 677 }
 678
 679
 680 void
 681 CanvasInterface::waypoint_duplicate(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
 682 {
 683         ValueNode::Handle value_node();
 684         waypoint_duplicate(value_desc.get_value_node(), waypoint);
 685 }
 686
 687 void
 688 CanvasInterface::waypoint_duplicate(ValueNode::Handle value_node,synfig::Waypoint waypoint)
 689 {
 690         Action::Handle  action(Action::create("waypoint_set_smart"));
 691
 692         assert(action);
 693         if(!action)
 694                 return;
 695
 696         waypoint.make_unique();
 697         waypoint.set_time(get_time());
 698
 699         action->set_param("canvas",get_canvas());
 700         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 701         action->set_param("waypoint",waypoint);
 702         action->set_param("time",get_time());
 703         action->set_param("value_node",value_node);
 704
 705         if(!get_instance()->perform_action(action))
 706                 get_ui_interface()->error(_("Action Failed."));
 707 }
 708
 709 void
 710 CanvasInterface::waypoint_remove(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
 711 {
 712         ValueNode::Handle value_node();
 713         waypoint_remove(value_desc.get_value_node(), waypoint);
 714 }
 715
 716 void
 717 CanvasInterface::waypoint_remove(ValueNode::Handle value_node,synfig::Waypoint waypoint)
 718 {
 719         Action::Handle  action(Action::create("waypoint_remove"));
 720
 721         assert(action);
 722         if(!action)
 723                 return;
 724
 725         action->set_param("canvas",get_canvas());
 726         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 727         action->set_param("waypoint",waypoint);
 728         action->set_param("value_node",value_node);
 729
 730         if(!get_instance()->perform_action(action))
 731                 get_ui_interface()->error(_("Action Failed."));
 732 }
 733
 734
 735 void
 736 CanvasInterface::auto_export(synfig::ValueNode::Handle /*value_node*/)
 737 {
 738 /*
 739         // Check to see if we are already exported.
 740         if(value_node->is_exported())
 741                 return;
 742
 743         Action::Handle  action(Action::create("value_node_add"));
 744
 745         assert(action);
 746         if(!action)
 747                 return;
 748
 749         String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
 750
 751         action->set_param("canvas",get_canvas());
 752         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 753         action->set_param("new",value_node);
 754         action->set_param("name",name);
 755
 756         if(!get_instance()->perform_action(action))
 757                 get_ui_interface()->error(_("Action Failed."));
 758 */
 759 }
 760
 761 void
 762 CanvasInterface::auto_export(const ValueDesc& /*value_desc*/)
 763 {
 764         // THIS FUNCTION IS DEPRECATED, AND IS NOW A STUB.
 765 #if 0
 766         // Check to see if we are already exported.
 767         if(value_desc.is_exported())
 768                 return;
 769
 770         Action::Handle  action(Action::create("value_desc_export"));
 771
 772         assert(action);
 773         if(!action)
 774                 return;
 775
 776         String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
 777
 778         action->set_param("canvas",get_canvas());
 779         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 780         action->set_param("value_desc",value_desc);
 781         action->set_param("name",name);
 782
 783         if(!get_instance()->perform_action(action))
 784                 get_ui_interface()->error(_("Action Failed."));
 785 #endif
 786 }
 787
 788 bool
 789 CanvasInterface::change_value(synfigapp::ValueDesc value_desc,synfig::ValueBase new_value)
 790 {
 791         // If this isn't really a change, then don't bother
 792         if(new_value==value_desc.get_value(get_time()))
 793                 return true;
 794
 795         // If this change needs to take place elsewhere, then so be it.
 796         if(value_desc.get_canvas())
 797         {
 798                 if (value_desc.get_canvas()->get_root() != get_canvas()->get_root())
 799                 {
 800                         etl::handle<Instance> instance;
 801                         instance=find_instance(value_desc.get_canvas()->get_root());
 802
 803                         if(instance)
 804                                 return instance->find_canvas_interface(value_desc.get_canvas())->change_value(value_desc,new_value);
 805                         else
 806                         {
 807                                 get_ui_interface()->error(_("The value you are trying to edit is in a composition\nwhich doesn't seem to be open. Open that composition and you\nshould be able to edit this value as normal."));
 808                                 return false;
 809                         }
 810                 }
 811         }
 812 #ifdef _DEBUG
 813         else
 814         { synfig::warning("Can't get canvas from value desc...?"); }
 815 #endif
 816
 817         synfigapp::Action::Handle action(synfigapp::Action::create("value_desc_set"));
 818         if(!action)
 819         {
 820                 return false;
 821         }
 822
 823         action->set_param("canvas",get_canvas());
 824         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 825         action->set_param("time",get_time());
 826         action->set_param("value_desc",value_desc);
 827         action->set_param("new_value",new_value);
 828
 829         return get_instance()->perform_action(action);
 830 }
 831
 832 void
 833 CanvasInterface::set_meta_data(const synfig::String& key,const synfig::String& data)
 834 {
 835         get_canvas()->set_meta_data(key,data);
 836 }
 837
 838
 839 // this function goes with find_important_value_descs()
 840 static int
 841 _process_value_desc(const synfigapp::ValueDesc& value_desc,std::vector<synfigapp::ValueDesc>& out, synfig::GUIDSet& guid_set)
 842 {
 843         int ret(0);
 844
 845         if(value_desc.get_value_type()==ValueBase::TYPE_CANVAS)
 846         {
 847                 Canvas::Handle canvas;
 848                 canvas=value_desc.get_value().get(canvas);
 849                 if(!canvas || !canvas->is_inline())
 850                         return ret;
 851                 ret+=CanvasInterface::find_important_value_descs(canvas,out,guid_set);
 852         }
 853
 854         if(value_desc.is_value_node())
 855         {
 856                 ValueNode::Handle value_node(value_desc.get_value_node());
 857
 858                 if(guid_set.count(value_node->get_guid()))
 859                         return ret;
 860                 guid_set.insert(value_node->get_guid());
 861
 862                 if(LinkableValueNode::Handle::cast_dynamic(value_node))
 863                 {
 864                         if(ValueNode_DynamicList::Handle::cast_dynamic(value_node))
 865                         {
 866                                 out.push_back(value_desc);
 867                                 ret++;
 868                         }
 869                         // Process the linkable ValueNode's children
 870                         LinkableValueNode::Handle value_node_copy(LinkableValueNode::Handle::cast_dynamic(value_node));
 871                         int i;
 872                         for(i=0;i<value_node_copy->link_count();i++)
 873                         {
 874                                 ValueNode::Handle link(value_node_copy->get_link(i));
 875                                 if(!link->is_exported())
 876                                         ret+=_process_value_desc(ValueDesc(value_node_copy,i),out,guid_set);
 877                         }
 878                 }
 879                 else if(ValueNode_Animated::Handle::cast_dynamic(value_node))
 880                 {
 881                         out.push_back(value_desc);
 882                         ret++;
 883                 }
 884         }
 885
 886         return ret;
 887 }
 888
 889 int
 890 CanvasInterface::find_important_value_descs(synfig::Canvas::Handle canvas,std::vector<synfigapp::ValueDesc>& out,synfig::GUIDSet& guid_set)
 891 {
 892         int ret(0);
 893         if(!canvas->is_inline())
 894         {
 895                 ValueNodeList::const_iterator iter;
 896
 897                 for(
 898                         iter=canvas->value_node_list().begin();
 899                         iter!=canvas->value_node_list().end();
 900                         ++iter)
 901                         ret+=_process_value_desc(ValueDesc(canvas,(*iter)->get_id()),out,guid_set);
 902         }
 903
 904         Canvas::const_iterator iter;
 905
 906         for(iter=canvas->begin();iter!=canvas->end();++iter)
 907         {
 908                 Layer::Handle layer(*iter);
 909
 910                 Layer::DynamicParamList::const_iterator iter;
 911                 for(
 912                         iter=layer->dynamic_param_list().begin();
 913                         iter!=layer->dynamic_param_list().end();
 914                         ++iter)
 915                 {
 916                         if(!iter->second->is_exported())
 917                                 ret+=_process_value_desc(ValueDesc(layer,iter->first),out,guid_set);
 918                 }
 919                 ValueBase value(layer->get_param("canvas"));
 920                 if(value.is_valid())
 921                         ret+=_process_value_desc(ValueDesc(layer,"canvas"),out,guid_set);
 922         }
 923
 924         return ret;
 925 }
 926
 927 int
 928 CanvasInterface::find_important_value_descs(std::vector<synfigapp::ValueDesc>& out)
 929 {
 930         synfig::GUIDSet tmp;
 931         return find_important_value_descs(get_canvas(),out,tmp);
 932 }
 933
 934 void
 935 CanvasInterface::seek_frame(int frames)
 936 {
 937         if(!frames)
 938                 return;
 939         float fps(get_canvas()->rend_desc().get_frame_rate());
 940         Time newtime(get_time()+(float)frames/fps);
 941         newtime=newtime.round(fps);
 942
 943         if(newtime<=get_canvas()->rend_desc().get_time_start())
 944                 newtime=get_canvas()->rend_desc().get_time_start();
 945         if(newtime>=get_canvas()->rend_desc().get_time_end())
 946                 newtime=get_canvas()->rend_desc().get_time_end();
 947         set_time(newtime);
 948 }
 949
 950 void
 951 CanvasInterface::seek_time(synfig::Time time)
 952 {
 953         if(!time)
 954                 return;
 955
 956         float fps(get_canvas()->rend_desc().get_frame_rate());
 957
 958         if(time>=synfig::Time::end())
 959         {
 960                 set_time(get_canvas()->rend_desc().get_time_end());
 961                 return;
 962         }
 963         if(time<=synfig::Time::begin())
 964         {
 965                 set_time(get_canvas()->rend_desc().get_time_start());
 966                 return;
 967         }
 968
 969         Time newtime(get_time()+time);
 970         newtime=newtime.round(fps);
 971
 972         if(newtime<=get_canvas()->rend_desc().get_time_start())
 973                 newtime=get_canvas()->rend_desc().get_time_start();
 974         if(newtime>=get_canvas()->rend_desc().get_time_end())
 975                 newtime=get_canvas()->rend_desc().get_time_end();
 976         set_time(newtime);
 977 }