synfig-studio/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         if(synfigapp::Main::get_blend_method() != Color::BLEND_BY_LAYER)
 231                 layer->set_param("blend_method",synfigapp::Main::get_blend_method());
 232
 233         {
 234                 // Grab the layer's list of parameters
 235                 Layer::ParamList paramlist=layer->get_param_list();
 236                 Layer::ParamList::iterator iter;
 237
 238                 // loop through the static parameters
 239                 for(iter=paramlist.begin();iter!=paramlist.end();++iter)
 240                 {
 241                         ValueNode::Handle value_node;
 242
 243                         // if we find any which are list values then make them
 244                         // into dynamic list valuenodes, unless every element of
 245                         // the list is a blinepoint, in which case convert it to a
 246                         // bline
 247                         if(iter->second.get_type()==ValueBase::TYPE_LIST)
 248                         {
 249                                 // check whether it's a list of blinepoints only
 250                                 vector<ValueBase> list(iter->second.get_list());
 251                                 if (list.size())
 252                                 {
 253                                         vector<ValueBase>::iterator iter2;
 254                                         for (iter2 = list.begin(); iter2 != list.end(); iter2++)
 255                                                 if (iter2->get_type() != ValueBase::TYPE_BLINEPOINT)
 256                                                         break;
 257                                         if (iter2 == list.end())
 258                                         {
 259                                                 value_node=LinkableValueNode::create("bline",iter->second);
 260                                                 ValueNode_BLine::Handle::cast_dynamic(value_node)->set_member_canvas(canvas);
 261                                         }
 262                                 }
 263
 264                                 if (!value_node)
 265                                         value_node=LinkableValueNode::create("dynamic_list",iter->second);
 266                         }
 267                         // otherwise, if it's a type that can be converted to
 268                         // 'composite' (other than the types that can be radial
 269                         // composite) then do so
 270                         else if(LinkableValueNode::check_type("composite",iter->second.get_type()) &&
 271                                          (iter->second.get_type()!=ValueBase::TYPE_COLOR &&
 272                                           iter->second.get_type()!=ValueBase::TYPE_VECTOR))
 273                                 value_node=LinkableValueNode::create("composite",iter->second);
 274
 275                         if(value_node)
 276                                 layer->connect_dynamic_param(iter->first,value_node);
 277                 }
 278         }
 279
 280         // Action to add the layer
 281         Action::Handle  action(Action::LayerAdd::create());
 282
 283         assert(action);
 284         if(!action)
 285                 return 0;
 286
 287         action->set_param("canvas",canvas);
 288         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 289         action->set_param("new",layer);
 290
 291         if(!action->is_ready())
 292         {
 293                 get_ui_interface()->error(_("Action Not Ready"));
 294                 return 0;
 295         }
 296
 297         if(!get_instance()->perform_action(action))
 298         {
 299                 get_ui_interface()->error(_("Action Failed."));
 300                 return 0;
 301         }
 302
 303         // synfig::info("DEPTH=%d",depth);
 304
 305         // Action to move the layer (if necessary)
 306         if(depth>0)
 307         {
 308                 Action::Handle  action(Action::create("LayerMove"));
 309
 310                 assert(action);
 311                 if(!action)
 312                         return 0;
 313
 314                 action->set_param("canvas",canvas);
 315                 action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 316                 action->set_param("layer",layer);
 317                 action->set_param("new_index",depth);
 318
 319                 if(!action->is_ready())
 320                 {
 321                         get_ui_interface()->error(_("Move Action Not Ready"));
 322                         return 0;
 323                 }
 324
 325                 if(!get_instance()->perform_action(action))
 326                 {
 327                         get_ui_interface()->error(_("Move Action Failed."));
 328                         return 0;
 329                 }
 330         }
 331
 332
 333         return layer;
 334 }
 335
 336
 337 bool
 338 CanvasInterface::convert(ValueDesc value_desc, synfig::String type)
 339 {
 340         Action::Handle  action(Action::ValueDescConvert::create());
 341
 342         assert(action);
 343         if(!action)
 344                 return 0;
 345
 346         action->set_param("canvas",get_canvas());
 347         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 348         action->set_param("value_desc",value_desc);
 349         action->set_param("type",type);
 350         action->set_param("time",get_time());
 351
 352         if(!action->is_ready())
 353         {
 354                 get_ui_interface()->error(_("Action Not Ready"));
 355                 return 0;
 356         }
 357
 358         if(get_instance()->perform_action(action))
 359                 return true;
 360
 361         get_ui_interface()->error(_("Action Failed."));
 362         return false;
 363 }
 364
 365 bool
 366 CanvasInterface::add_value_node(synfig::ValueNode::Handle value_node, synfig::String name)
 367 {
 368         if(name.empty())
 369         {
 370                 get_ui_interface()->error(_("Empty name!"));
 371                 return false;
 372         }
 373
 374         Action::Handle  action(Action::ValueNodeAdd::create());
 375
 376         assert(action);
 377         if(!action)
 378                 return 0;
 379
 380         action->set_param("canvas",get_canvas());
 381         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 382         action->set_param("new",value_node);
 383         action->set_param("name",name);
 384
 385         if(!action->is_ready())
 386         {
 387                 get_ui_interface()->error(_("Action Not Ready"));
 388                 return 0;
 389         }
 390
 391         if(get_instance()->perform_action(action))
 392                 return true;
 393
 394         get_ui_interface()->error(_("Action Failed."));
 395         return false;
 396 }
 397
 398 Action::ParamList
 399 CanvasInterface::generate_param_list(const ValueDesc &value_desc)
 400 {
 401         synfigapp::Action::ParamList param_list;
 402         param_list.add("time",get_time());
 403         param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
 404         param_list.add("canvas",get_canvas());
 405
 406         param_list.add("value_desc",value_desc);
 407
 408         if(value_desc.parent_is_value_node())
 409                 param_list.add("parent_value_node",value_desc.get_parent_value_node());
 410
 411         if(value_desc.is_value_node())
 412                 param_list.add("value_node",value_desc.get_value_node());
 413
 414         if(value_desc.is_const())
 415         {
 416                 // Fix 1868911: if we put a ValueBase holding a Canvas handle
 417                 // into the param_list and then export the canvas, the handle
 418                 // will miss out of having its reference count reduced,
 419                 // because by the time the handle is destructed the canvas
 420                 // will no longer be inline.  So let's not propogate that
 421                 // ValueBase any further than here.
 422                 if (value_desc.get_value_type() == ValueBase::TYPE_CANVAS)
 423                         param_list.add("value",Canvas::LooseHandle(value_desc.get_value().get(Canvas::LooseHandle())));
 424                 else
 425                         param_list.add("value",value_desc.get_value());
 426         }
 427
 428         if(value_desc.parent_is_layer_param())
 429         {
 430                 param_list.add("parent_layer",value_desc.get_layer());
 431                 param_list.add("parent_layer_param",value_desc.get_param_name());
 432         }
 433
 434         {
 435                 synfigapp::SelectionManager::ChildrenList children_list;
 436                 children_list=get_selection_manager()->get_selected_children();
 437                 if(!value_desc.parent_is_canvas() && children_list.size()==1)
 438                 {
 439                         param_list.add("dest",value_desc);
 440                         param_list.add("src",children_list.front().get_value_node());
 441                 }
 442         }
 443         return param_list;
 444 }
 445
 446 Action::ParamList
 447 CanvasInterface::generate_param_list(const std::list<synfigapp::ValueDesc> &value_desc_list)
 448 {
 449         synfigapp::Action::ParamList param_list;
 450         param_list.add("time",get_time());
 451         param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
 452         param_list.add("canvas",get_canvas());
 453
 454         std::list<synfigapp::ValueDesc>::const_iterator iter;
 455         for(iter=value_desc_list.begin();iter!=value_desc_list.end();++iter)
 456         {
 457                 param_list.add("value_desc",*iter);
 458                 if(iter->is_value_node())
 459                 {
 460                         param_list.add("value_node",iter->get_value_node());
 461                 }
 462         }
 463
 464
 465         return param_list;
 466 }
 467
 468 void
 469 CanvasInterface::set_rend_desc(const synfig::RendDesc &rend_desc)
 470 {
 471         Action::Handle  action(Action::create("CanvasRendDescSet"));
 472
 473         assert(action);
 474         if(!action)
 475                 return;
 476
 477         action->set_param("canvas",get_canvas());
 478         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 479         action->set_param("rend_desc",rend_desc);
 480
 481         if(!get_instance()->perform_action(action))
 482                 get_ui_interface()->error(_("Action Failed."));
 483 }
 484
 485 void
 486 CanvasInterface::set_name(const synfig::String &x)
 487 {
 488         Action::Handle  action(Action::create("CanvasNameSet"));
 489
 490         assert(action);
 491         if(!action)
 492                 return;
 493
 494         action->set_param("canvas",get_canvas());
 495         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 496         action->set_param("name",x);
 497
 498         if(!get_instance()->perform_action(action))
 499                 get_ui_interface()->error(_("Action Failed."));
 500
 501         signal_id_changed_();
 502 }
 503
 504 void
 505 CanvasInterface::set_description(const synfig::String &x)
 506 {
 507         Action::Handle  action(Action::create("CanvasDescriptionSet"));
 508
 509         assert(action);
 510         if(!action)
 511                 return;
 512
 513         action->set_param("canvas",get_canvas());
 514         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 515         action->set_param("description",x);
 516
 517         if(!get_instance()->perform_action(action))
 518                 get_ui_interface()->error(_("Action Failed."));
 519 }
 520
 521 void
 522 CanvasInterface::set_id(const synfig::String &x)
 523 {
 524         Action::Handle  action(Action::create("CanvasIdSet"));
 525
 526         assert(action);
 527         if(!action)
 528                 return;
 529
 530         action->set_param("canvas",get_canvas());
 531         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 532         action->set_param("id",x);
 533
 534         if(!get_instance()->perform_action(action))
 535                 get_ui_interface()->error(_("Action Failed."));
 536
 537         signal_id_changed_();
 538 }
 539
 540
 541 void
 542 CanvasInterface::jump_to_next_keyframe()
 543 {
 544         synfig::info("Current time: %s",get_time().get_string().c_str());
 545         try
 546         {
 547                 synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_next(get_time()));
 548                 synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
 549                 set_time(keyframe.get_time());
 550         }
 551         catch(...) { synfig::warning("Unable to find next keyframe"); }
 552 }
 553
 554 void
 555 CanvasInterface::jump_to_prev_keyframe()
 556 {
 557         synfig::info("Current time: %s",get_time().get_string().c_str());
 558         try
 559         {
 560                 synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_prev(get_time()));
 561                 synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
 562                 set_time(keyframe.get_time());
 563         }
 564         catch(...) { synfig::warning("Unable to find prev keyframe"); }
 565 }
 566
 567 bool
 568 CanvasInterface::import(const synfig::String &filename, synfig::String &errors, synfig::String &warnings, bool resize_image)
 569 {
 570         Action::PassiveGrouper group(get_instance().get(),_("Import Image"));
 571
 572         synfig::info("Attempting to import "+filename);
 573
 574         if (filename_extension(filename) == "")
 575         {
 576                 get_ui_interface()->error(_("Filename must have an extension!"));
 577                 return false;
 578         }
 579
 580         String ext(filename_extension(filename));
 581         if (ext.size()) ext = ext.substr(1); // skip initial '.'
 582         std::transform(ext.begin(),ext.end(),ext.begin(),&::tolower);
 583
 584         if(ext=="svg"){//I don't like it, but worse is nothing
 585                 Layer::Handle _new_layer(add_layer_to("PasteCanvas",get_canvas()));
 586                 Layer::Handle _aux_layer(add_layer_to("svg_layer",get_canvas()));
 587                 if(_aux_layer){
 588                         _aux_layer->set_param("filename",ValueBase(filename));
 589                         _new_layer->set_param("canvas",ValueBase(_aux_layer->get_param("canvas")));
 590                         //remove aux layer
 591                         Action::Handle  action(Action::LayerRemove::create());
 592                         assert(action);
 593                         if(!action)
 594                                 return 0;
 595                         action->set_param("canvas",get_canvas());
 596                         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 597                         action->set_param("layer",_aux_layer);
 598                         if(!action->is_ready()){
 599                                 get_ui_interface()->error(_("Action Not Ready"));
 600                                 return 0;
 601                         }
 602                         if(!get_instance()->perform_action(action)){
 603                                 get_ui_interface()->error(_("Action Failed."));
 604                                 return 0;
 605                         }
 606                 }
 607                 signal_layer_new_description()(_new_layer,filename);
 608                 return true;
 609         }
 610
 611         // If this is a SIF file, then we need to do things slightly differently
 612         if(ext=="sif" || ext=="sifz")try
 613         {
 614                 Canvas::Handle outside_canvas(synfig::open_canvas(filename, errors, warnings));
 615                 if(!outside_canvas)
 616                         throw String(_("Unable to open this composition")) + ":\n\n" + errors;
 617
 618                 Layer::Handle layer(add_layer_to("PasteCanvas",get_canvas()));
 619                 if(!layer)
 620                         throw String(_("Unable to create \"Paste Canvas\" layer"));
 621                 if(!layer->set_param("canvas",ValueBase(outside_canvas)))
 622                         throw int();
 623                 get_canvas()->register_external_canvas(filename, outside_canvas);
 624
 625                 //layer->set_description(basename(filename));
 626                 signal_layer_new_description()(layer,filename);
 627                 return true;
 628         }
 629         catch(String x)
 630         {
 631                 get_ui_interface()->error(filename + ": " + x);
 632                 return false;
 633         }
 634         catch(...)
 635         {
 636                 get_ui_interface()->error(_("Uncaught exception when attempting\nto open this composition -- ")+filename);
 637                 return false;
 638         }
 639
 640         if(!Importer::book().count(ext))
 641         {
 642                 get_ui_interface()->error(_("I don't know how to open images of this type -- ")+ext);
 643                 return false;
 644         }
 645
 646         try
 647         {
 648                 Layer::Handle layer(add_layer_to("Import",get_canvas()));
 649                 int w,h;
 650                 if(!layer)
 651                         throw int();
 652                 if(!layer->set_param("filename",ValueBase(filename)))
 653                         throw int();
 654                 w=layer->get_param("_width").get(int());
 655                 h=layer->get_param("_height").get(int());
 656                 if(w&&h)
 657                 {
 658                         Vector x, size=ValueBase(get_canvas()->rend_desc().get_br()-get_canvas()->rend_desc().get_tl());
 659
 660                         // vector from top left of canvas to bottom right
 661                         if (resize_image)
 662                         {
 663                                 if(abs(size[0])<abs(size[1]))   // if canvas is tall and thin
 664                                 {
 665                                         x[0]=size[0];   // use full width
 666                                         x[1]=size[0]/w*h; // and scale for height
 667                                         if((size[0]<0) ^ (size[1]<0))
 668                                                 x[1]=-x[1];
 669                                 }
 670                                 else                            // else canvas is short and fat (or maybe square)
 671                                 {
 672                                         x[1]=size[1];   // use full height
 673                                         x[0]=size[1]/h*w; // and scale for width
 674                                         if((size[0]<0) ^ (size[1]<0))
 675                                                 x[0]=-x[0];
 676                                 }
 677                         }
 678                         else
 679                         {
 680                                 x[0] = w/60.0;
 681                                 x[1] = h/60.0;
 682                                 if((size[0]<0)) x[0]=-x[0];
 683                                 if((size[1]<0)) x[1]=-x[1];
 684                         }
 685
 686                         if(!layer->set_param("tl",ValueBase(-x/2)))
 687                                 throw int();
 688                         if(!layer->set_param("br",ValueBase(x/2)))
 689                                 throw int();
 690                 }
 691                 else
 692                 {
 693                         if(!layer->set_param("tl",ValueBase(get_canvas()->rend_desc().get_tl())))
 694                                 throw int();
 695                         if(!layer->set_param("br",ValueBase(get_canvas()->rend_desc().get_br())))
 696                                 throw int();
 697                 }
 698
 699                 layer->set_description(basename(filename));
 700                 signal_layer_new_description()(layer,filename);
 701
 702                 return true;
 703         }
 704         catch(...)
 705         {
 706                 get_ui_interface()->error("Unable to import "+filename);
 707                 group.cancel();
 708                 return false;
 709         }
 710 }
 711
 712
 713 void
 714 CanvasInterface::waypoint_duplicate(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
 715 {
 716         ValueNode::Handle value_node();
 717         waypoint_duplicate(value_desc.get_value_node(), waypoint);
 718 }
 719
 720 void
 721 CanvasInterface::waypoint_duplicate(ValueNode::Handle value_node,synfig::Waypoint waypoint)
 722 {
 723         Action::Handle  action(Action::create("WaypointSetSmart"));
 724
 725         assert(action);
 726         if(!action)
 727                 return;
 728
 729         waypoint.make_unique();
 730         waypoint.set_time(get_time());
 731
 732         action->set_param("canvas",get_canvas());
 733         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 734         action->set_param("waypoint",waypoint);
 735         action->set_param("time",get_time());
 736         action->set_param("value_node",value_node);
 737
 738         if(!get_instance()->perform_action(action))
 739                 get_ui_interface()->error(_("Action Failed."));
 740 }
 741
 742 void
 743 CanvasInterface::waypoint_remove(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
 744 {
 745         ValueNode::Handle value_node();
 746         waypoint_remove(value_desc.get_value_node(), waypoint);
 747 }
 748
 749 void
 750 CanvasInterface::waypoint_remove(ValueNode::Handle value_node,synfig::Waypoint waypoint)
 751 {
 752         Action::Handle  action(Action::create("WaypointRemove"));
 753
 754         assert(action);
 755         if(!action)
 756                 return;
 757
 758         action->set_param("canvas",get_canvas());
 759         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 760         action->set_param("waypoint",waypoint);
 761         action->set_param("value_node",value_node);
 762
 763         if(!get_instance()->perform_action(action))
 764                 get_ui_interface()->error(_("Action Failed."));
 765 }
 766
 767
 768 void
 769 CanvasInterface::auto_export(synfig::ValueNode::Handle /*value_node*/)
 770 {
 771 /*
 772         // Check to see if we are already exported.
 773         if(value_node->is_exported())
 774                 return;
 775
 776         Action::Handle  action(Action::create("ValueNodeAdd"));
 777
 778         assert(action);
 779         if(!action)
 780                 return;
 781
 782         String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
 783
 784         action->set_param("canvas",get_canvas());
 785         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 786         action->set_param("new",value_node);
 787         action->set_param("name",name);
 788
 789         if(!get_instance()->perform_action(action))
 790                 get_ui_interface()->error(_("Action Failed."));
 791 */
 792 }
 793
 794 void
 795 CanvasInterface::auto_export(const ValueDesc& /*value_desc*/)
 796 {
 797         // THIS FUNCTION IS DEPRECATED, AND IS NOW A STUB.
 798 #if 0
 799         // Check to see if we are already exported.
 800         if(value_desc.is_exported())
 801                 return;
 802
 803         Action::Handle  action(Action::create("ValueDescExport"));
 804
 805         assert(action);
 806         if(!action)
 807                 return;
 808
 809         String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
 810
 811         action->set_param("canvas",get_canvas());
 812         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 813         action->set_param("value_desc",value_desc);
 814         action->set_param("name",name);
 815
 816         if(!get_instance()->perform_action(action))
 817                 get_ui_interface()->error(_("Action Failed."));
 818 #endif
 819 }
 820
 821 bool
 822 CanvasInterface::change_value(synfigapp::ValueDesc value_desc,synfig::ValueBase new_value)
 823 {
 824         // If this isn't really a change, then don't bother
 825         if(new_value==value_desc.get_value(get_time()))
 826                 return true;
 827
 828         // If this change needs to take place elsewhere, then so be it.
 829         if(value_desc.get_canvas())
 830         {
 831                 if (value_desc.get_canvas()->get_root() != get_canvas()->get_root())
 832                 {
 833                         etl::handle<Instance> instance;
 834                         instance=find_instance(value_desc.get_canvas()->get_root());
 835
 836                         if(instance)
 837                                 return instance->find_canvas_interface(value_desc.get_canvas())->change_value(value_desc,new_value);
 838                         else
 839                         {
 840                                 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."));
 841                                 return false;
 842                         }
 843                 }
 844         }
 845 #ifdef _DEBUG
 846         else
 847         { synfig::warning("Can't get canvas from value desc...?"); }
 848 #endif
 849
 850         synfigapp::Action::Handle action(synfigapp::Action::create("ValueDescSet"));
 851         if(!action)
 852         {
 853                 return false;
 854         }
 855
 856         action->set_param("canvas",get_canvas());
 857         action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
 858         action->set_param("time",get_time());
 859         action->set_param("value_desc",value_desc);
 860         action->set_param("new_value",new_value);
 861
 862         return get_instance()->perform_action(action);
 863 }
 864
 865 void
 866 CanvasInterface::set_meta_data(const synfig::String& key,const synfig::String& data)
 867 {
 868         get_canvas()->set_meta_data(key,data);
 869 }
 870
 871
 872 // this function goes with find_important_value_descs()
 873 static int
 874 _process_value_desc(const synfigapp::ValueDesc& value_desc,std::vector<synfigapp::ValueDesc>& out, synfig::GUIDSet& guid_set)
 875 {
 876         int ret(0);
 877
 878         if(value_desc.get_value_type()==ValueBase::TYPE_CANVAS)
 879         {
 880                 Canvas::Handle canvas;
 881                 canvas=value_desc.get_value().get(canvas);
 882                 if(!canvas || !canvas->is_inline())
 883                         return ret;
 884                 ret+=CanvasInterface::find_important_value_descs(canvas,out,guid_set);
 885         }
 886
 887         if(value_desc.is_value_node())
 888         {
 889                 ValueNode::Handle value_node(value_desc.get_value_node());
 890
 891                 if(guid_set.count(value_node->get_guid()))
 892                         return ret;
 893                 guid_set.insert(value_node->get_guid());
 894
 895                 if(LinkableValueNode::Handle::cast_dynamic(value_node))
 896                 {
 897                         if(ValueNode_DynamicList::Handle::cast_dynamic(value_node))
 898                         {
 899                                 out.push_back(value_desc);
 900                                 ret++;
 901                         }
 902                         // Process the linkable ValueNode's children
 903                         LinkableValueNode::Handle value_node_copy(LinkableValueNode::Handle::cast_dynamic(value_node));
 904                         int i;
 905                         for(i=0;i<value_node_copy->link_count();i++)
 906                         {
 907                                 ValueNode::Handle link(value_node_copy->get_link(i));
 908                                 if(!link->is_exported())
 909                                         ret+=_process_value_desc(ValueDesc(value_node_copy,i),out,guid_set);
 910                         }
 911                 }
 912                 else if(ValueNode_Animated::Handle::cast_dynamic(value_node))
 913                 {
 914                         out.push_back(value_desc);
 915                         ret++;
 916                 }
 917         }
 918
 919         return ret;
 920 }
 921
 922 int
 923 CanvasInterface::find_important_value_descs(synfig::Canvas::Handle canvas,std::vector<synfigapp::ValueDesc>& out,synfig::GUIDSet& guid_set)
 924 {
 925         int ret(0);
 926         if(!canvas->is_inline())
 927         {
 928                 ValueNodeList::const_iterator iter;
 929
 930                 for(
 931                         iter=canvas->value_node_list().begin();
 932                         iter!=canvas->value_node_list().end();
 933                         ++iter)
 934                         ret+=_process_value_desc(ValueDesc(canvas,(*iter)->get_id()),out,guid_set);
 935         }
 936
 937         Canvas::const_iterator iter;
 938
 939         for(iter=canvas->begin();iter!=canvas->end();++iter)
 940         {
 941                 Layer::Handle layer(*iter);
 942
 943                 Layer::DynamicParamList::const_iterator iter;
 944                 for(
 945                         iter=layer->dynamic_param_list().begin();
 946                         iter!=layer->dynamic_param_list().end();
 947                         ++iter)
 948                 {
 949                         if(!iter->second->is_exported())
 950                                 ret+=_process_value_desc(ValueDesc(layer,iter->first),out,guid_set);
 951                 }
 952                 ValueBase value(layer->get_param("canvas"));
 953                 if(value.is_valid())
 954                         ret+=_process_value_desc(ValueDesc(layer,"canvas"),out,guid_set);
 955         }
 956
 957         return ret;
 958 }
 959
 960 int
 961 CanvasInterface::find_important_value_descs(std::vector<synfigapp::ValueDesc>& out)
 962 {
 963         synfig::GUIDSet tmp;
 964         return find_important_value_descs(get_canvas(),out,tmp);
 965 }
 966
 967 void
 968 CanvasInterface::seek_frame(int frames)
 969 {
 970         if(!frames)
 971                 return;
 972         float fps(get_canvas()->rend_desc().get_frame_rate());
 973         Time newtime(get_time()+(float)frames/fps);
 974         newtime=newtime.round(fps);
 975
 976         if(newtime<=get_canvas()->rend_desc().get_time_start())
 977                 newtime=get_canvas()->rend_desc().get_time_start();
 978         if(newtime>=get_canvas()->rend_desc().get_time_end())
 979                 newtime=get_canvas()->rend_desc().get_time_end();
 980         set_time(newtime);
 981 }
 982
 983 void
 984 CanvasInterface::seek_time(synfig::Time time)
 985 {
 986         if(!time)
 987                 return;
 988
 989         float fps(get_canvas()->rend_desc().get_frame_rate());
 990
 991         if(time>=synfig::Time::end())
 992         {
 993                 set_time(get_canvas()->rend_desc().get_time_end());
 994                 return;
 995         }
 996         if(time<=synfig::Time::begin())
 997         {
 998                 set_time(get_canvas()->rend_desc().get_time_start());
 999                 return;
1000         }
1001
1002         Time newtime(get_time()+time);
1003         newtime=newtime.round(fps);
1004
1005         if(newtime<=get_canvas()->rend_desc().get_time_start())
1006                 newtime=get_canvas()->rend_desc().get_time_start();
1007         if(newtime>=get_canvas()->rend_desc().get_time_end())
1008                 newtime=get_canvas()->rend_desc().get_time_end();
1009         set_time(newtime);
1010 }