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