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 **      Copyright (c) 2009 Carlos A. Sosa Navarro
  11 **
  12 **      This package is free software; you can redistribute it and/or
  13 **      modify it under the terms of the GNU General Public License as
  14 **      published by the Free Software Foundation; either version 2 of
  15 **      the License, or (at your option) any later version.
  16 **
  17 **      This package is distributed in the hope that it will be useful,
  18 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20 **      General Public License for more details.
  21 **      \endlegal
  22 */
  23 /* ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 //#include <iostream>
  35
  36 #include <ETL/clock>
  37 #include <synfig/valuenode_scale.h>
  38 #include <synfig/valuenode_timedswap.h>
  39 #include <synfig/valuenode_composite.h>
  40 #include <synfig/valuenode_subtract.h>
  41 #include <synfig/valuenode_linear.h>
  42 #include <synfig/valuenode_reference.h>
  43 #include <synfig/valuenode_twotone.h>
  44 #include <synfig/valuenode_stripes.h>
  45 #include <synfig/valuenode_bline.h>
  46
  47 #include <synfig/waypoint.h>
  48 #include <synfig/loadcanvas.h>
  49 #include <synfig/importer.h>
  50 #include <synfig/guidset.h>
  51
  52 #include "canvasinterface.h"
  53 #include "instance.h"
  54
  55 #include "actions/layeradd.h"
  56 #include "actions/layerremove.h"
  57 #include "actions/valuedescconvert.h"
  58 #include "actions/valuenodeadd.h"
  59 #include "actions/editmodeset.h"
  60 #include "action_system.h"
  61
  62 #include "main.h"
  63
  64 #include <synfig/gradient.h>
  65
  66 #include "general.h"
  67
  68 #endif
  69
  70 /* === U S I N G =========================================================== */
  71
  72 using namespace std;
  73 using namespace etl;
  74 using namespace synfig;
  75 using namespace synfigapp;
  76
  77 /* === M A C R O S ========================================================= */
  78
  79 /* === G L O B A L S ======================================================= */
  80
  81 /* === P R O C E D U R E S ================================================= */
  82
  83 /* === M E T H O D S ======================================================= */
  84
  85 CanvasInterface::CanvasInterface(etl::loose_handle<Instance> instance,etl::handle<synfig::Canvas> canvas):
  86         instance_(instance),
  87         canvas_(canvas),
  88         cur_time_(canvas->rend_desc().get_frame_start()),
  89         mode_(MODE_NORMAL|MODE_ANIMATE_PAST|MODE_ANIMATE_FUTURE)
  90 {
  91         set_selection_manager(get_instance()->get_selection_manager());
  92         set_ui_interface(get_instance()->get_ui_interface());
  93 }
  94
  95 CanvasInterface::~CanvasInterface()
  96 {
  97         if (getenv("SYNFIG_DEBUG_DESTRUCTORS"))
  98                 synfig::info("CanvasInterface::~CanvasInterface(): Deleted");
  99 }
 100
 101 void
 102 CanvasInterface::set_time(synfig::Time x)
 103 {
 104         if(get_canvas()->rend_desc().get_frame_rate())
 105         {
 106                 float fps(get_canvas()->rend_desc().get_frame_rate());
 107                 Time r(x.round(fps));
 108                 //synfig::info("CanvasInterface::set_time(): %s rounded to %s\n",x.get_string(fps).c_str(),r.get_string(fps).c_str());
 109                 x=r;
 110         }
 111         if(cur_time_.is_equal(x))
 112                 return;
 113         get_canvas()->set_time(cur_time_=x);
 114
 115         // update the time in all the child canvases
 116         Canvas::Children children = get_canvas()->get_root()->children();
 117         handle<CanvasInterface> interface;
 118         for (Canvas::Children::iterator iter = children.begin(); iter != children.end(); iter++)
 119                 if ((interface = get_instance()->find_canvas_interface(*iter)) != this)
 120                         interface->set_time(interface->get_canvas()->get_time());
 121
 122         signal_time_changed()();
 123         signal_dirty_preview()();
 124 }
 125
 126 synfig::Time
 127 CanvasInterface::get_time()const
 128 {
 129         return cur_time_;
 130 }
 131
 132 void
 133 CanvasInterface::refresh_current_values()
 134 {
 135         get_canvas()->set_time(cur_time_);
 136         signal_time_changed()();
 137         signal_dirty_preview()();
 138 }
 139
 140 etl::handle<CanvasInterface>
 141 CanvasInterface::create(etl::loose_handle<Instance> instance, etl::handle<synfig::Canvas> canvas)
 142 {
 143         etl::handle<CanvasInterface> intrfc;
 144         intrfc=new CanvasInterface(instance,canvas);
 145         instance->canvas_interface_list().push_front(intrfc);
 146         return intrfc;
 147 }
 148
 149 void
 150 CanvasInterface::set_mode(Mode x)
 151 {
 152         Action::Handle  action(Action::EditModeSet::create());
 153
 154         assert(action);
 155
 156         action->set_param("canvas",get_canvas());
 157         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 158         action->set_param("edit_mode",x);
 159
 160         if(!action->is_ready())
 161         {
 162                 get_ui_interface()->error(_("Action Not Ready, unable to change mode"));
 163                 assert(0);
 164                 return;
 165         }
 166
 167         if(!get_instance()->perform_action(action))
 168                 get_ui_interface()->error(_("Unable to change mode"));
 169
 170 //      mode_=x;
 171 //      signal_mode_changed_(x);
 172 }
 173
 174 CanvasInterface::Mode
 175 CanvasInterface::get_mode()const
 176 {
 177         return mode_;
 178 }
 179
 180
 181
 182 Layer::Handle
 183 CanvasInterface::add_layer_to(synfig::String name, synfig::Canvas::Handle canvas, int depth)
 184 {
 185         synfigapp::Action::PassiveGrouper group(get_instance().get(),_("Add Layer To"));
 186
 187         Layer::Handle   layer(Layer::create(name));
 188
 189         assert(layer);
 190
 191         if(!layer)
 192                 return 0;
 193
 194         if(canvas!=get_canvas() && !canvas->is_inline())
 195         {
 196                 synfig::error("Bad canvas passed to \"add_layer_to\"");
 197                 return 0;
 198         }
 199
 200         // automatically export the Index parameter of new Duplicate layers
 201         if (name == "duplicate")
 202                 for (int i = 1; ; i++)
 203                 {
 204                         String name = strprintf(_("Index %d"), i);
 205                         try
 206                         {
 207                                 canvas->find_value_node(name);
 208                         }
 209                         catch (Exception::IDNotFound x)
 210                         {
 211                                 add_value_node(layer->dynamic_param_list().find("index")->second, name);
 212                                 break;
 213                         }
 214                 }
 215
 216         layer->set_canvas(canvas);
 217
 218         // Apply some defaults
 219         if(layer->set_param("fg",synfigapp::Main::get_outline_color()))
 220                 layer->set_param("bg",synfigapp::Main::get_fill_color());
 221         else if (name == "outline")
 222                 layer->set_param("color",synfigapp::Main::get_outline_color());
 223         else
 224                 layer->set_param("color",synfigapp::Main::get_fill_color());
 225
 226         layer->set_param("width",synfigapp::Main::get_bline_width().units(get_canvas()->rend_desc()));
 227         layer->set_param("gradient",synfigapp::Main::get_gradient());
 228         if(name!="zoom")
 229                 layer->set_param("amount",synfigapp::Main::get_opacity());
 230         layer->set_param("blend_method",synfigapp::Main::get_blend_method());
 231
 232         {
 233                 // Grab the layer's list of parameters
 234                 Layer::ParamList paramlist=layer->get_param_list();
 235                 Layer::ParamList::iterator iter;
 236
 237                 // loop through the static parameters
 238                 for(iter=paramlist.begin();iter!=paramlist.end();++iter)
 239                 {
 240                         ValueNode::Handle value_node;
 241
 242                         // if we find any which are list values then make them
 243                         // into dynamic list valuenodes, unless every element of
 244                         // the list is a blinepoint, in which case convert it to a
 245                         // bline
 246                         if(iter->second.get_type()==ValueBase::TYPE_LIST)
 247                         {
 248                                 // check whether it's a list of blinepoints only
 249                                 vector<ValueBase> list(iter->second.get_list());
 250                                 if (list.size())
 251                                 {
 252                                         vector<ValueBase>::iterator iter2;
 253                                         for (iter2 = list.begin(); iter2 != list.end(); iter2++)
 254                                                 if (iter2->get_type() != ValueBase::TYPE_BLINEPOINT)
 255                                                         break;
 256                                         if (iter2 == list.end())
 257                                         {
 258                                                 value_node=LinkableValueNode::create("bline",iter->second);
 259                                                 ValueNode_BLine::Handle::cast_dynamic(value_node)->set_member_canvas(canvas);
 260                                         }
 261                                 }
 262
 263                                 if (!value_node)
 264                                         value_node=LinkableValueNode::create("dynamic_list",iter->second);
 265                         }
 266                         // otherwise, if it's a type that can be converted to
 267                         // 'composite' (other than the types that can be radial
 268                         // composite) then do so
 269                         else if(LinkableValueNode::check_type("composite",iter->second.get_type()) &&
 270                                          (iter->second.get_type()!=ValueBase::TYPE_COLOR &&
 271                                           iter->second.get_type()!=ValueBase::TYPE_VECTOR))
 272                                 value_node=LinkableValueNode::create("composite",iter->second);
 273
 274                         if(value_node)
 275                                 layer->connect_dynamic_param(iter->first,value_node);
 276                 }
 277         }
 278
 279         // Action to add the layer
 280         Action::Handle  action(Action::LayerAdd::create());
 281
 282         assert(action);
 283         if(!action)
 284                 return 0;
 285
 286         action->set_param("canvas",canvas);
 287         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 288         action->set_param("new",layer);
 289
 290         if(!action->is_ready())
 291         {
 292                 get_ui_interface()->error(_("Action Not Ready"));
 293                 return 0;
 294         }
 295
 296         if(!get_instance()->perform_action(action))
 297         {
 298                 get_ui_interface()->error(_("Action Failed."));
 299                 return 0;
 300         }
 301
 302         // synfig::info("DEPTH=%d",depth);
 303
 304         // Action to move the layer (if necessary)
 305         if(depth>0)
 306         {
 307                 Action::Handle  action(Action::create("LayerMove"));
 308
 309                 assert(action);
 310                 if(!action)
 311                         return 0;
 312
 313                 action->set_param("canvas",canvas);
 314                 action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 315                 action->set_param("layer",layer);
 316                 action->set_param("new_index",depth);
 317
 318                 if(!action->is_ready())
 319                 {
 320                         get_ui_interface()->error(_("Move Action Not Ready"));
 321                         return 0;
 322                 }
 323
 324                 if(!get_instance()->perform_action(action))
 325                 {
 326                         get_ui_interface()->error(_("Move Action Failed."));
 327                         return 0;
 328                 }
 329         }
 330
 331
 332         return layer;
 333 }
 334
 335
 336 bool
 337 CanvasInterface::convert(ValueDesc value_desc, synfig::String type)
 338 {
 339         Action::Handle  action(Action::ValueDescConvert::create());
 340
 341         assert(action);
 342         if(!action)
 343                 return 0;
 344
 345         action->set_param("canvas",get_canvas());
 346         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 347         action->set_param("value_desc",value_desc);
 348         action->set_param("type",type);
 349         action->set_param("time",get_time());
 350
 351         if(!action->is_ready())
 352         {
 353                 get_ui_interface()->error(_("Action Not Ready"));
 354                 return 0;
 355         }
 356
 357         if(get_instance()->perform_action(action))
 358                 return true;
 359
 360         get_ui_interface()->error(_("Action Failed."));
 361         return false;
 362 }
 363
 364 bool
 365 CanvasInterface::add_value_node(synfig::ValueNode::Handle value_node, synfig::String name)
 366 {
 367         if(name.empty())
 368         {
 369                 get_ui_interface()->error(_("Empty name!"));
 370                 return false;
 371         }
 372
 373         Action::Handle  action(Action::ValueNodeAdd::create());
 374
 375         assert(action);
 376         if(!action)
 377                 return 0;
 378
 379         action->set_param("canvas",get_canvas());
 380         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 381         action->set_param("new",value_node);
 382         action->set_param("name",name);
 383
 384         if(!action->is_ready())
 385         {
 386                 get_ui_interface()->error(_("Action Not Ready"));
 387                 return 0;
 388         }
 389
 390         if(get_instance()->perform_action(action))
 391                 return true;
 392
 393         get_ui_interface()->error(_("Action Failed."));
 394         return false;
 395 }
 396
 397 Action::ParamList
 398 CanvasInterface::generate_param_list(const ValueDesc &value_desc)
 399 {
 400         synfigapp::Action::ParamList param_list;
 401         param_list.add("time",get_time());
 402         param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
 403         param_list.add("canvas",get_canvas());
 404
 405         param_list.add("value_desc",value_desc);
 406
 407         if(value_desc.parent_is_value_node())
 408                 param_list.add("parent_value_node",value_desc.get_parent_value_node());
 409
 410         if(value_desc.is_value_node())
 411                 param_list.add("value_node",value_desc.get_value_node());
 412
 413         if(value_desc.is_const())
 414         {
 415                 // Fix 1868911: if we put a ValueBase holding a Canvas handle
 416                 // into the param_list and then export the canvas, the handle
 417                 // will miss out of having its reference count reduced,
 418                 // because by the time the handle is destructed the canvas
 419                 // will no longer be inline.  So let's not propogate that
 420                 // ValueBase any further than here.
 421                 if (value_desc.get_value_type() == ValueBase::TYPE_CANVAS)
 422                         param_list.add("value",Canvas::LooseHandle(value_desc.get_value().get(Canvas::LooseHandle())));
 423                 else
 424                         param_list.add("value",value_desc.get_value());
 425         }
 426
 427         if(value_desc.parent_is_layer_param())
 428         {
 429                 param_list.add("parent_layer",value_desc.get_layer());
 430                 param_list.add("parent_layer_param",value_desc.get_param_name());
 431         }
 432
 433         {
 434                 synfigapp::SelectionManager::ChildrenList children_list;
 435                 children_list=get_selection_manager()->get_selected_children();
 436                 if(!value_desc.parent_is_canvas() && children_list.size()==1)
 437                 {
 438                         param_list.add("dest",value_desc);
 439                         param_list.add("src",children_list.front().get_value_node());
 440                 }
 441         }
 442         return param_list;
 443 }
 444
 445 Action::ParamList
 446 CanvasInterface::generate_param_list(const std::list<synfigapp::ValueDesc> &value_desc_list)
 447 {
 448         synfigapp::Action::ParamList param_list;
 449         param_list.add("time",get_time());
 450         param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
 451         param_list.add("canvas",get_canvas());
 452
 453         std::list<synfigapp::ValueDesc>::const_iterator iter;
 454         for(iter=value_desc_list.begin();iter!=value_desc_list.end();++iter)
 455         {
 456                 param_list.add("value_desc",*iter);
 457                 if(iter->is_value_node())
 458                 {
 459                         param_list.add("value_node",iter->get_value_node());
 460                 }
 461         }
 462
 463
 464         return param_list;
 465 }
 466
 467 void
 468 CanvasInterface::set_rend_desc(const synfig::RendDesc &rend_desc)
 469 {
 470         Action::Handle  action(Action::create("CanvasRendDescSet"));
 471
 472         assert(action);
 473         if(!action)
 474                 return;
 475
 476         action->set_param("canvas",get_canvas());
 477         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 478         action->set_param("rend_desc",rend_desc);
 479
 480         if(!get_instance()->perform_action(action))
 481                 get_ui_interface()->error(_("Action Failed."));
 482 }
 483
 484 void
 485 CanvasInterface::set_name(const synfig::String &x)
 486 {
 487         Action::Handle  action(Action::create("CanvasNameSet"));
 488
 489         assert(action);
 490         if(!action)
 491                 return;
 492
 493         action->set_param("canvas",get_canvas());
 494         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 495         action->set_param("name",x);
 496
 497         if(!get_instance()->perform_action(action))
 498                 get_ui_interface()->error(_("Action Failed."));
 499
 500         signal_id_changed_();
 501 }
 502
 503 void
 504 CanvasInterface::set_description(const synfig::String &x)
 505 {
 506         Action::Handle  action(Action::create("CanvasDescriptionSet"));
 507
 508         assert(action);
 509         if(!action)
 510                 return;
 511
 512         action->set_param("canvas",get_canvas());
 513         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 514         action->set_param("description",x);
 515
 516         if(!get_instance()->perform_action(action))
 517                 get_ui_interface()->error(_("Action Failed."));
 518 }
 519
 520 void
 521 CanvasInterface::set_id(const synfig::String &x)
 522 {
 523         Action::Handle  action(Action::create("CanvasIdSet"));
 524
 525         assert(action);
 526         if(!action)
 527                 return;
 528
 529         action->set_param("canvas",get_canvas());
 530         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 531         action->set_param("id",x);
 532
 533         if(!get_instance()->perform_action(action))
 534                 get_ui_interface()->error(_("Action Failed."));
 535
 536         signal_id_changed_();
 537 }
 538
 539
 540 void
 541 CanvasInterface::jump_to_next_keyframe()
 542 {
 543         synfig::info("Current time: %s",get_time().get_string().c_str());
 544         try
 545         {
 546                 synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_next(get_time()));
 547                 synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
 548                 set_time(keyframe.get_time());
 549         }
 550         catch(...) { synfig::warning("Unable to find next keyframe"); }
 551 }
 552
 553 void
 554 CanvasInterface::jump_to_prev_keyframe()
 555 {
 556         synfig::info("Current time: %s",get_time().get_string().c_str());
 557         try
 558         {
 559                 synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_prev(get_time()));
 560                 synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
 561                 set_time(keyframe.get_time());
 562         }
 563         catch(...) { synfig::warning("Unable to find prev keyframe"); }
 564 }
 565
 566 bool
 567 CanvasInterface::import(const synfig::String &filename, synfig::String &errors, synfig::String &warnings, bool resize_image)
 568 {
 569         Action::PassiveGrouper group(get_instance().get(),_("Import Image"));
 570
 571         synfig::info("Attempting to import "+filename);
 572
 573         if (filename_extension(filename) == "")
 574         {
 575                 get_ui_interface()->error(_("Filename must have an extension!"));
 576                 return false;
 577         }
 578
 579         String ext(filename_extension(filename));
 580         if (ext.size()) ext = ext.substr(1); // skip initial '.'
 581         std::transform(ext.begin(),ext.end(),ext.begin(),&::tolower);
 582
 583         if(ext=="svg"){//I don't like it, but worse is nothing
 584                 Layer::Handle _new_layer(add_layer_to("PasteCanvas",get_canvas()));
 585                 Layer::Handle _aux_layer(add_layer_to("svg_layer",get_canvas()));
 586                 if(_aux_layer){
 587                         _aux_layer->set_param("filename",ValueBase(filename));
 588                         _new_layer->set_param("canvas",ValueBase(_aux_layer->get_param("canvas")));
 589                         //remove aux layer
 590                         Action::Handle  action(Action::LayerRemove::create());
 591                         assert(action);
 592                         if(!action)
 593                                 return 0;
 594                         action->set_param("canvas",get_canvas());
 595                         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 596                         action->set_param("layer",_aux_layer);
 597                         if(!action->is_ready()){
 598                                 get_ui_interface()->error(_("Action Not Ready"));
 599                                 return 0;
 600                         }
 601                         if(!get_instance()->perform_action(action)){
 602                                 get_ui_interface()->error(_("Action Failed."));
 603                                 return 0;
 604                         }
 605                 }
 606                 signal_layer_new_description()(_new_layer,filename);
 607                 return true;
 608         }
 609
 610         // If this is a SIF file, then we need to do things slightly differently
 611         if(ext=="sif" || ext=="sifz")try
 612         {
 613                 Canvas::Handle outside_canvas(synfig::open_canvas(filename, errors, warnings));
 614                 if(!outside_canvas)
 615                         throw String(_("Unable to open this composition")) + ":\n\n" + errors;
 616
 617                 Layer::Handle layer(add_layer_to("PasteCanvas",get_canvas()));
 618                 if(!layer)
 619                         throw String(_("Unable to create \"Paste Canvas\" layer"));
 620                 if(!layer->set_param("canvas",ValueBase(outside_canvas)))
 621                         throw int();
 622                 get_canvas()->register_external_canvas(filename, outside_canvas);
 623
 624                 //layer->set_description(basename(filename));
 625                 signal_layer_new_description()(layer,filename);
 626                 return true;
 627         }
 628         catch(String x)
 629         {
 630                 get_ui_interface()->error(filename + ": " + x);
 631                 return false;
 632         }
 633         catch(...)
 634         {
 635                 get_ui_interface()->error(_("Uncaught exception when attempting\nto open this composition -- ")+filename);
 636                 return false;
 637         }
 638
 639         if(!Importer::book().count(ext))
 640         {
 641                 get_ui_interface()->error(_("I don't know how to open images of this type -- ")+ext);
 642                 return false;
 643         }
 644
 645         try
 646         {
 647                 Layer::Handle layer(add_layer_to("Import",get_canvas()));
 648                 int w,h;
 649                 if(!layer)
 650                         throw int();
 651                 if(!layer->set_param("filename",ValueBase(filename)))
 652                         throw int();
 653                 w=layer->get_param("_width").get(int());
 654                 h=layer->get_param("_height").get(int());
 655                 if(w&&h)
 656                 {
 657                         Vector x, size=ValueBase(get_canvas()->rend_desc().get_br()-get_canvas()->rend_desc().get_tl());
 658
 659                         // vector from top left of canvas to bottom right
 660                         if (resize_image)
 661                         {
 662                                 if(abs(size[0])<abs(size[1]))   // if canvas is tall and thin
 663                                 {
 664                                         x[0]=size[0];   // use full width
 665                                         x[1]=size[0]/w*h; // and scale for height
 666                                         if((size[0]<0) ^ (size[1]<0))
 667                                                 x[1]=-x[1];
 668                                 }
 669                                 else                            // else canvas is short and fat (or maybe square)
 670                                 {
 671                                         x[1]=size[1];   // use full height
 672                                         x[0]=size[1]/h*w; // and scale for width
 673                                         if((size[0]<0) ^ (size[1]<0))
 674                                                 x[0]=-x[0];
 675                                 }
 676                         }
 677                         else
 678                         {
 679                                 x[0] = w/60.0;
 680                                 x[1] = h/60.0;
 681                                 if((size[0]<0)) x[0]=-x[0];
 682                                 if((size[1]<0)) x[1]=-x[1];
 683                         }
 684
 685                         if(!layer->set_param("tl",ValueBase(-x/2)))
 686                                 throw int();
 687                         if(!layer->set_param("br",ValueBase(x/2)))
 688                                 throw int();
 689                 }
 690                 else
 691                 {
 692                         if(!layer->set_param("tl",ValueBase(get_canvas()->rend_desc().get_tl())))
 693                                 throw int();
 694                         if(!layer->set_param("br",ValueBase(get_canvas()->rend_desc().get_br())))
 695                                 throw int();
 696                 }
 697
 698                 layer->set_description(basename(filename));
 699                 signal_layer_new_description()(layer,filename);
 700
 701                 return true;
 702         }
 703         catch(...)
 704         {
 705                 get_ui_interface()->error("Unable to import "+filename);
 706                 group.cancel();
 707                 return false;
 708         }
 709 }
 710
 711
 712 void
 713 CanvasInterface::waypoint_duplicate(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
 714 {
 715         ValueNode::Handle value_node();
 716         waypoint_duplicate(value_desc.get_value_node(), waypoint);
 717 }
 718
 719 void
 720 CanvasInterface::waypoint_duplicate(ValueNode::Handle value_node,synfig::Waypoint waypoint)
 721 {
 722         Action::Handle  action(Action::create("WaypointSetSmart"));
 723
 724         assert(action);
 725         if(!action)
 726                 return;
 727
 728         waypoint.make_unique();
 729         waypoint.set_time(get_time());
 730
 731         action->set_param("canvas",get_canvas());
 732         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 733         action->set_param("waypoint",waypoint);
 734         action->set_param("time",get_time());
 735         action->set_param("value_node",value_node);
 736
 737         if(!get_instance()->perform_action(action))
 738                 get_ui_interface()->error(_("Action Failed."));
 739 }
 740
 741 void
 742 CanvasInterface::waypoint_remove(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
 743 {
 744         ValueNode::Handle value_node();
 745         waypoint_remove(value_desc.get_value_node(), waypoint);
 746 }
 747
 748 void
 749 CanvasInterface::waypoint_remove(ValueNode::Handle value_node,synfig::Waypoint waypoint)
 750 {
 751         Action::Handle  action(Action::create("WaypointRemove"));
 752
 753         assert(action);
 754         if(!action)
 755                 return;
 756
 757         action->set_param("canvas",get_canvas());
 758         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 759         action->set_param("waypoint",waypoint);
 760         action->set_param("value_node",value_node);
 761
 762         if(!get_instance()->perform_action(action))
 763                 get_ui_interface()->error(_("Action Failed."));
 764 }
 765
 766
 767 void
 768 CanvasInterface::auto_export(synfig::ValueNode::Handle /*value_node*/)
 769 {
 770 /*
 771         // Check to see if we are already exported.
 772         if(value_node->is_exported())
 773                 return;
 774
 775         Action::Handle  action(Action::create("ValueNodeAdd"));
 776
 777         assert(action);
 778         if(!action)
 779                 return;
 780
 781         String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
 782
 783         action->set_param("canvas",get_canvas());
 784         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 785         action->set_param("new",value_node);
 786         action->set_param("name",name);
 787
 788         if(!get_instance()->perform_action(action))
 789                 get_ui_interface()->error(_("Action Failed."));
 790 */
 791 }
 792
 793 void
 794 CanvasInterface::auto_export(const ValueDesc& /*value_desc*/)
 795 {
 796         // THIS FUNCTION IS DEPRECATED, AND IS NOW A STUB.
 797 #if 0
 798         // Check to see if we are already exported.
 799         if(value_desc.is_exported())
 800                 return;
 801
 802         Action::Handle  action(Action::create("ValueDescExport"));
 803
 804         assert(action);
 805         if(!action)
 806                 return;
 807
 808         String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
 809
 810         action->set_param("canvas",get_canvas());
 811         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 812         action->set_param("value_desc",value_desc);
 813         action->set_param("name",name);
 814
 815         if(!get_instance()->perform_action(action))
 816                 get_ui_interface()->error(_("Action Failed."));
 817 #endif
 818 }
 819
 820 bool
 821 CanvasInterface::change_value(synfigapp::ValueDesc value_desc,synfig::ValueBase new_value)
 822 {
 823         // If this isn't really a change, then don't bother
 824         if(new_value==value_desc.get_value(get_time()))
 825                 return true;
 826
 827         // If this change needs to take place elsewhere, then so be it.
 828         if(value_desc.get_canvas())
 829         {
 830                 if (value_desc.get_canvas()->get_root() != get_canvas()->get_root())
 831                 {
 832                         etl::handle<Instance> instance;
 833                         instance=find_instance(value_desc.get_canvas()->get_root());
 834
 835                         if(instance)
 836                                 return instance->find_canvas_interface(value_desc.get_canvas())->change_value(value_desc,new_value);
 837                         else
 838                         {
 839                                 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."));
 840                                 return false;
 841                         }
 842                 }
 843         }
 844 #ifdef _DEBUG
 845         else
 846         { synfig::warning("Can't get canvas from value desc...?"); }
 847 #endif
 848
 849         synfigapp::Action::Handle action(synfigapp::Action::create("ValueDescSet"));
 850         if(!action)
 851         {
 852                 return false;
 853         }
 854
 855         action->set_param("canvas",get_canvas());
 856         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 857         action->set_param("time",get_time());
 858         action->set_param("value_desc",value_desc);
 859         action->set_param("new_value",new_value);
 860
 861         return get_instance()->perform_action(action);
 862 }
 863
 864 void
 865 CanvasInterface::set_meta_data(const synfig::String& key,const synfig::String& data)
 866 {
 867         get_canvas()->set_meta_data(key,data);
 868 }
 869
 870
 871 // this function goes with find_important_value_descs()
 872 static int
 873 _process_value_desc(const synfigapp::ValueDesc& value_desc,std::vector<synfigapp::ValueDesc>& out, synfig::GUIDSet& guid_set)
 874 {
 875         int ret(0);
 876
 877         if(value_desc.get_value_type()==ValueBase::TYPE_CANVAS)
 878         {
 879                 Canvas::Handle canvas;
 880                 canvas=value_desc.get_value().get(canvas);
 881                 if(!canvas || !canvas->is_inline())
 882                         return ret;
 883                 ret+=CanvasInterface::find_important_value_descs(canvas,out,guid_set);
 884         }
 885
 886         if(value_desc.is_value_node())
 887         {
 888                 ValueNode::Handle value_node(value_desc.get_value_node());
 889
 890                 if(guid_set.count(value_node->get_guid()))
 891                         return ret;
 892                 guid_set.insert(value_node->get_guid());
 893
 894                 if(LinkableValueNode::Handle::cast_dynamic(value_node))
 895                 {
 896                         if(ValueNode_DynamicList::Handle::cast_dynamic(value_node))
 897                         {
 898                                 out.push_back(value_desc);
 899                                 ret++;
 900                         }
 901                         // Process the linkable ValueNode's children
 902                         LinkableValueNode::Handle value_node_copy(LinkableValueNode::Handle::cast_dynamic(value_node));
 903                         int i;
 904                         for(i=0;i<value_node_copy->link_count();i++)
 905                         {
 906                                 ValueNode::Handle link(value_node_copy->get_link(i));
 907                                 if(!link->is_exported())
 908                                         ret+=_process_value_desc(ValueDesc(value_node_copy,i),out,guid_set);
 909                         }
 910                 }
 911                 else if(ValueNode_Animated::Handle::cast_dynamic(value_node))
 912                 {
 913                         out.push_back(value_desc);
 914                         ret++;
 915                 }
 916         }
 917
 918         return ret;
 919 }
 920
 921 int
 922 CanvasInterface::find_important_value_descs(synfig::Canvas::Handle canvas,std::vector<synfigapp::ValueDesc>& out,synfig::GUIDSet& guid_set)
 923 {
 924         int ret(0);
 925         if(!canvas->is_inline())
 926         {
 927                 ValueNodeList::const_iterator iter;
 928
 929                 for(
 930                         iter=canvas->value_node_list().begin();
 931                         iter!=canvas->value_node_list().end();
 932                         ++iter)
 933                         ret+=_process_value_desc(ValueDesc(canvas,(*iter)->get_id()),out,guid_set);
 934         }
 935
 936         Canvas::const_iterator iter;
 937
 938         for(iter=canvas->begin();iter!=canvas->end();++iter)
 939         {
 940                 Layer::Handle layer(*iter);
 941
 942                 Layer::DynamicParamList::const_iterator iter;
 943                 for(
 944                         iter=layer->dynamic_param_list().begin();
 945                         iter!=layer->dynamic_param_list().end();
 946                         ++iter)
 947                 {
 948                         if(!iter->second->is_exported())
 949                                 ret+=_process_value_desc(ValueDesc(layer,iter->first),out,guid_set);
 950                 }
 951                 ValueBase value(layer->get_param("canvas"));
 952                 if(value.is_valid())
 953                         ret+=_process_value_desc(ValueDesc(layer,"canvas"),out,guid_set);
 954         }
 955
 956         return ret;
 957 }
 958
 959 int
 960 CanvasInterface::find_important_value_descs(std::vector<synfigapp::ValueDesc>& out)
 961 {
 962         synfig::GUIDSet tmp;
 963         return find_important_value_descs(get_canvas(),out,tmp);
 964 }
 965
 966 void
 967 CanvasInterface::seek_frame(int frames)
 968 {
 969         if(!frames)
 970                 return;
 971         float fps(get_canvas()->rend_desc().get_frame_rate());
 972         Time newtime(get_time()+(float)frames/fps);
 973         newtime=newtime.round(fps);
 974
 975         if(newtime<=get_canvas()->rend_desc().get_time_start())
 976                 newtime=get_canvas()->rend_desc().get_time_start();
 977         if(newtime>=get_canvas()->rend_desc().get_time_end())
 978                 newtime=get_canvas()->rend_desc().get_time_end();
 979         set_time(newtime);
 980 }
 981
 982 void
 983 CanvasInterface::seek_time(synfig::Time time)
 984 {
 985         if(!time)
 986                 return;
 987
 988         float fps(get_canvas()->rend_desc().get_frame_rate());
 989
 990         if(time>=synfig::Time::end())
 991         {
 992                 set_time(get_canvas()->rend_desc().get_time_end());
 993                 return;
 994         }
 995         if(time<=synfig::Time::begin())
 996         {
 997                 set_time(get_canvas()->rend_desc().get_time_start());
 998                 return;
 999         }
1000
1001         Time newtime(get_time()+time);
1002         newtime=newtime.round(fps);
1003
1004         if(newtime<=get_canvas()->rend_desc().get_time_start())
1005                 newtime=get_canvas()->rend_desc().get_time_start();
1006         if(newtime>=get_canvas()->rend_desc().get_time_end())
1007                 newtime=get_canvas()->rend_desc().get_time_end();
1008         set_time(newtime);
1009 }