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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file state_width.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include <gtkmm/dialog.h>
  33 #include <gtkmm/entry.h>
  34
  35 #include <ETL/bezier>
  36
  37 #include <synfig/valuenode_dynamiclist.h>
  38 #include <synfigapp/action_system.h>
  39
  40 #include "state_width.h"
  41 #include "canvasview.h"
  42 #include "workarea.h"
  43 #include "app.h"
  44
  45 #include <synfigapp/action.h>
  46 #include "event_mouse.h"
  47 #include "event_layerclick.h"
  48 #include "toolbox.h"
  49 #include "dialog_tooloptions.h"
  50 #include <gtkmm/optionmenu.h>
  51 #include "duck.h"
  52
  53 //#include <synfigapp/value_desc.h>
  54 #include <synfigapp/main.h>
  55
  56 #include <ETL/clock>
  57
  58 #include "general.h"
  59
  60 #endif
  61
  62 /* === U S I N G =========================================================== */
  63
  64 using namespace std;
  65 using namespace etl;
  66 using namespace synfig;
  67 using namespace synfigapp;
  68 using namespace studio;
  69
  70 /* === M A C R O S ========================================================= */
  71
  72 /* === G L O B A L S ======================================================= */
  73
  74 StateWidth studio::state_width;
  75
  76 /* === C L A S S E S & S T R U C T S ======================================= */
  77
  78 class studio::StateWidth_Context : public sigc::trackable
  79 {
  80         etl::handle<CanvasView> canvas_view_;
  81         CanvasView::IsWorking is_working;
  82
  83         //Point mouse_pos;
  84
  85         handle<Duck> center;
  86         handle<Duck> radius;
  87         handle<Duck> closestpoint;
  88
  89         map<handle<Duck>,Real>  changetable;
  90
  91         etl::clock      clocktime;
  92         Real            lastt;
  93
  94         bool added;
  95
  96         void refresh_ducks();
  97
  98         bool prev_workarea_layer_clicking;
  99         bool prev_workarea_duck_clicking;
 100         Duckmatic::Type old_duckmask;
 101
 102         //Toolbox settings
 103         synfigapp::Settings& settings;
 104
 105         //Toolbox display
 106         Gtk::Table options_table;
 107
 108         Gtk::Adjustment adj_delta;
 109         Gtk::SpinButton spin_delta;
 110
 111         Gtk::Adjustment adj_radius;
 112         Gtk::SpinButton spin_radius;
 113
 114         Gtk::CheckButton check_relative;
 115
 116         void AdjustWidth(handle<Duckmatic::Bezier> c, float t, Real mult, bool invert);
 117
 118 public:
 119
 120         Real get_delta()const { return adj_delta.get_value(); }
 121         void set_delta(Real f) { adj_delta.set_value(f); }
 122
 123         Real get_radius()const { return adj_radius.get_value(); }
 124         void set_radius(Real f) { adj_radius.set_value(f); }
 125
 126         bool get_relative() const { return check_relative.get_active(); }
 127         void set_relative(bool r) { check_relative.set_active(r); }
 128
 129         void refresh_tool_options(); //to refresh the toolbox
 130
 131         //events
 132         Smach::event_result event_stop_handler(const Smach::event& x);
 133         Smach::event_result event_refresh_handler(const Smach::event& x);
 134         Smach::event_result event_mouse_handler(const Smach::event& x);
 135         Smach::event_result event_refresh_tool_options(const Smach::event& x);
 136
 137         //constructor destructor
 138         StateWidth_Context(CanvasView* canvas_view);
 139         ~StateWidth_Context();
 140
 141         //Canvas interaction
 142         const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
 143         etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
 144         synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
 145         WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
 146
 147         //Modifying settings etc.
 148         void load_settings();
 149         void save_settings();
 150         void reset();
 151
 152 };      // END of class StateWidth_Context
 153
 154 /* === M E T H O D S ======================================================= */
 155
 156 StateWidth::StateWidth():
 157         Smach::state<StateWidth_Context>("width")
 158 {
 159         insert(event_def(EVENT_STOP,&StateWidth_Context::event_stop_handler));
 160         insert(event_def(EVENT_REFRESH,&StateWidth_Context::event_refresh_handler));
 161         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DOWN,&StateWidth_Context::event_mouse_handler));
 162         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,&StateWidth_Context::event_mouse_handler));
 163         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_UP,&StateWidth_Context::event_mouse_handler));
 164         insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StateWidth_Context::event_refresh_tool_options));
 165 }
 166
 167 StateWidth::~StateWidth()
 168 {
 169 }
 170
 171 void
 172 StateWidth_Context::load_settings()
 173 {
 174         String value;
 175
 176         //parse the arguments yargh!
 177         if(settings.get_value("width.delta",value))
 178                 set_delta(atof(value.c_str()));
 179         else
 180                 set_delta(6);
 181
 182         if(settings.get_value("width.radius",value))
 183                 set_radius(atof(value.c_str()));
 184         else
 185                 set_radius(15);
 186
 187         //defaults to true
 188         if(settings.get_value("width.relative",value) && value == "0")
 189                 set_relative(false);
 190         else
 191                 set_relative(true);
 192 }
 193
 194 void
 195 StateWidth_Context::save_settings()
 196 {
 197         settings.set_value("width.delta",strprintf("%f",get_delta()));
 198         settings.set_value("width.radius",strprintf("%f",get_radius()));
 199         settings.set_value("width.relative",get_relative()?"1":"0");
 200 }
 201
 202 void
 203 StateWidth_Context::reset()
 204 {
 205         refresh_ducks();
 206 }
 207
 208 StateWidth_Context::StateWidth_Context(CanvasView* canvas_view):
 209         canvas_view_(canvas_view),
 210         is_working(*canvas_view),
 211         prev_workarea_layer_clicking(get_work_area()->get_allow_layer_clicks()),
 212         prev_workarea_duck_clicking(get_work_area()->get_allow_duck_clicks()),
 213         old_duckmask(get_work_area()->get_type_mask()),
 214
 215         settings(synfigapp::Main::get_selected_input_device()->settings()),
 216
 217         adj_delta(6,0,1,0.001,0.01),
 218         spin_delta(adj_delta,0.01,3),
 219
 220         adj_radius(0,0,1e50,1,10),
 221         spin_radius(adj_radius,1,1),
 222
 223         check_relative(_("Relative Growth"))
 224 {
 225         load_settings();
 226
 227         // Set up the tool options dialog
 228         options_table.attach(*manage(new Gtk::Label(_("Width Tool"))),  0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 229
 230         //expand stuff
 231         options_table.attach(*manage(new Gtk::Label(_("Growth:"))),             0, 1, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 232         options_table.attach(spin_delta,                                                                1, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 233
 234         options_table.attach(*manage(new Gtk::Label(_("Radius:"))),             0, 1, 2, 3, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 235         options_table.attach(spin_radius,                                                               1, 2, 2, 3, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 236
 237         options_table.attach(check_relative,                                                    0, 2, 3, 4, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 238
 239         options_table.show_all();
 240
 241         refresh_tool_options();
 242         App::dialog_tool_options->present();
 243
 244         // Turn off layer clicking
 245         get_work_area()->set_allow_layer_clicks(false);
 246
 247         // clear out the ducks
 248         //get_work_area()->clear_ducks();
 249
 250         // Refresh the work area
 251         get_work_area()->queue_draw();
 252
 253         //Create the new ducks
 254         added = false;
 255
 256         if(!center)
 257         {
 258                 center = new Duck();
 259                 center->set_name("p1");
 260                 center->set_type(Duck::TYPE_POSITION);
 261         }
 262
 263         if(!radius)
 264         {
 265                 radius = new Duck();
 266                 radius->set_origin(center);
 267                 radius->set_radius(true);
 268                 radius->set_type(Duck::TYPE_RADIUS);
 269                 radius->set_name("radius");
 270         }
 271
 272         if(!closestpoint)
 273         {
 274                 closestpoint = new Duck();
 275                 closestpoint->set_name("closest");
 276                 closestpoint->set_type(Duck::TYPE_POSITION);
 277         }
 278
 279         //Disable duck clicking for the maximum coolness :)
 280         get_work_area()->set_allow_duck_clicks(false);
 281         get_work_area()->set_type_mask((Duck::Type)((int)Duck::TYPE_WIDTH + (int)Duck::TYPE_RADIUS));
 282
 283         // Turn the mouse pointer to crosshairs
 284         get_work_area()->set_cursor(Gdk::CROSSHAIR);
 285
 286         // Hide the tables if they are showing
 287         //prev_table_status=get_canvas_view()->tables_are_visible();
 288         //if(prev_table_status)get_canvas_view()->hide_tables();
 289
 290         // Disable the time bar
 291         //get_canvas_view()->set_sensitive_timebar(false);
 292
 293         // Connect a signal
 294         //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StateWidth_Context::on_user_click));
 295
 296         App::toolbox->refresh();
 297 }
 298
 299 void
 300 StateWidth_Context::refresh_tool_options()
 301 {
 302         App::dialog_tool_options->clear();
 303         App::dialog_tool_options->set_widget(options_table);
 304         App::dialog_tool_options->set_local_name(_("Width Tool"));
 305         App::dialog_tool_options->set_name("width");
 306 }
 307
 308 Smach::event_result
 309 StateWidth_Context::event_refresh_tool_options(const Smach::event& /*x*/)
 310 {
 311         refresh_tool_options();
 312         return Smach::RESULT_ACCEPT;
 313 }
 314
 315 StateWidth_Context::~StateWidth_Context()
 316 {
 317         save_settings();
 318
 319         //remove ducks if need be
 320         if(added)
 321         {
 322                 get_work_area()->erase_duck(center);
 323                 get_work_area()->erase_duck(radius);
 324                 get_work_area()->erase_duck(closestpoint);
 325                 added = false;
 326         }
 327
 328         // Restore Duck clicking
 329         get_work_area()->set_allow_duck_clicks(prev_workarea_duck_clicking);
 330
 331         // Restore layer clicking
 332         get_work_area()->set_allow_layer_clicks(prev_workarea_layer_clicking);
 333
 334         // Restore the mouse pointer
 335         get_work_area()->reset_cursor();
 336
 337         // Restore duck masking
 338         get_work_area()->set_type_mask(old_duckmask);
 339
 340         // Tool options be rid of ye!!
 341         App::dialog_tool_options->clear();
 342
 343         // Enable the time bar
 344         //get_canvas_view()->set_sensitive_timebar(true);
 345
 346         // Bring back the tables if they were out before
 347         //if(prev_table_status)get_canvas_view()->show_tables();
 348
 349         // Refresh the work area
 350         get_work_area()->queue_draw();
 351
 352         App::toolbox->refresh();
 353 }
 354
 355 Smach::event_result
 356 StateWidth_Context::event_stop_handler(const Smach::event& /*x*/)
 357 {
 358         throw Smach::egress_exception();
 359 }
 360
 361 Smach::event_result
 362 StateWidth_Context::event_refresh_handler(const Smach::event& /*x*/)
 363 {
 364         refresh_ducks();
 365         return Smach::RESULT_ACCEPT;
 366 }
 367
 368 void
 369 StateWidth_Context::AdjustWidth(handle<Duckmatic::Bezier> c, float t, Real mult, bool invert)
 370 {
 371         //Leave the function if there is no curve
 372         if(!c)return;
 373
 374         Real amount1=0,amount2=0;
 375
 376         //decide how much to change each width
 377         /*
 378         t \in [0,1]
 379
 380         both pressure and multiply amount are in mult
 381                 (may want to change this to allow different types of falloff)
 382
 383         rsq is the squared distance from the point on the curve (also part of the falloff)
 384
 385
 386         */
 387         //may want to provide a different falloff function...
 388         if(t <= 0.2)
 389                 amount1 = mult;
 390         else if(t >= 0.8)
 391                 amount2 = mult;
 392         else
 393         {
 394                 t = (t-0.2)/0.6;
 395                 amount1 = (1-t)*mult;
 396                 amount2 = t*mult;
 397         }
 398
 399         if(invert)
 400         {
 401                 amount1 *= -1;
 402                 amount2 *= -1;
 403         }
 404
 405         handle<Duck>    p1 = c->p1;
 406         handle<Duck>    p2 = c->p2;
 407
 408         handle<Duck>    w1,w2;
 409
 410         //find w1,w2
 411         {
 412                 const DuckList dl = get_work_area()->get_duck_list();
 413
 414                 DuckList::const_iterator i = dl.begin();
 415
 416                 for(;i != dl.end(); ++i)
 417                 {
 418                         if((*i)->get_type() == Duck::TYPE_WIDTH)
 419                         {
 420                                 if((*i)->get_origin_duck() == p1)
 421                                 {
 422                                         w1 = *i;
 423                                 }
 424
 425                                 if((*i)->get_origin_duck() == p2)
 426                                 {
 427                                         w2 = *i;
 428                                 }
 429                         }
 430                 }
 431         }
 432
 433         if(amount1 != 0 && w1)
 434         {
 435                 Real width = w1->get_point().mag();
 436
 437                 width += amount1;
 438                 w1->set_point(Vector(width,0));
 439
 440                 //log in the list of changes...
 441                 //to truly be changed after everything is said and done
 442                 changetable[w1] = width;
 443         }
 444
 445         if(amount2 != 0 && w2)
 446         {
 447                 Real width = w2->get_point().mag();
 448
 449                 width += amount2;
 450                 w2->set_point(Vector(width,0));
 451
 452                 //log in the list of changes...
 453                 //to truly be changed after everything is said and done
 454                 changetable[w2] = width;
 455         }
 456 }
 457
 458 Smach::event_result
 459 StateWidth_Context::event_mouse_handler(const Smach::event& x)
 460 {
 461         const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
 462
 463         //handle the click
 464         if( (event.key == EVENT_WORKAREA_MOUSE_BUTTON_DOWN || event.key == EVENT_WORKAREA_MOUSE_BUTTON_DRAG)
 465                         && event.button == BUTTON_LEFT )
 466         {
 467                 const Real pw = get_work_area()->get_pw();
 468                 const Real ph = get_work_area()->get_ph();
 469                 const Real scale = sqrt(pw*pw+ph*ph);
 470                 const Real rad = get_relative() ? scale * get_radius() : get_radius();
 471
 472                 bool invert = (event.modifier&Gdk::CONTROL_MASK);
 473
 474                 const Real threshold = 0.08;
 475
 476                 float t = 0;
 477                 Real rsq = 0;
 478
 479                 Real dtime = 1/60.0;
 480
 481                 //if we're dragging get the difference in time between now and then
 482                 if(event.key == EVENT_WORKAREA_MOUSE_BUTTON_DRAG)
 483                 {
 484                         dtime = min(1/15.0,clocktime());
 485                 }
 486                 clocktime.reset();
 487
 488                 //make way for new ducks
 489                 //get_work_area()->clear_ducks();
 490
 491                 //update positions
 492                 //mouse_pos = event.pos;
 493
 494                 center->set_point(event.pos);
 495                 if(!added)get_work_area()->add_duck(center);
 496
 497                 radius->set_scalar(rad);
 498                 if(!added)get_work_area()->add_duck(radius);
 499
 500                 //the other duck is at the current duck
 501                 closestpoint->set_point(event.pos);
 502                 if(!added)get_work_area()->add_duck(closestpoint);
 503
 504                 //get the closest curve...
 505                 handle<Duckmatic::Bezier>       c;
 506                 if(event.pressure >= threshold)
 507                         c = get_work_area()->find_bezier(event.pos,scale*8,rad,&t);
 508
 509                 //run algorithm on event.pos to get 2nd placement
 510                 if(!c.empty())
 511                 {
 512                         bezier<Point> curve;
 513                         Point p;
 514
 515                         curve[0] = c->p1->get_trans_point();
 516                         curve[1] = c->c1->get_trans_point();
 517                         curve[2] = c->c2->get_trans_point();
 518                         curve[3] = c->p2->get_trans_point();
 519
 520                         p = curve(t);
 521                         rsq = (p-event.pos).mag_squared();
 522
 523                         const Real r = rad*rad;
 524
 525                         if(rsq < r)
 526                         {
 527                                 closestpoint->set_point(curve(t));
 528
 529                                 //adjust the width...
 530                                 //squared falloff for radius... [0,1]
 531
 532                                 Real ri = (r - rsq)/r;
 533                                 AdjustWidth(c,t,ri*event.pressure*get_delta()*dtime,invert);
 534                         }
 535                 }
 536
 537                 //the points have been added
 538                 added = true;
 539
 540                 //draw where it is yo!
 541                 get_work_area()->queue_draw();
 542
 543                 return Smach::RESULT_ACCEPT;
 544         }
 545
 546         if(event.key == EVENT_WORKAREA_MOUSE_BUTTON_UP && event.button == BUTTON_LEFT)
 547         {
 548                 if(added)
 549                 {
 550                         get_work_area()->erase_duck(center);
 551                         get_work_area()->erase_duck(radius);
 552                         get_work_area()->erase_duck(closestpoint);
 553                         added = false;
 554                 }
 555
 556                 //Affect the width changes here...
 557                 map<handle<Duck>,Real>::iterator i = changetable.begin();
 558
 559                 synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Sketch Width"));
 560                 for(; i != changetable.end(); ++i)
 561                 {
 562                         //for each duck modify IT!!!
 563                         ValueDesc desc = i->first->get_value_desc();
 564
 565                         if(     desc.get_value_type() == ValueBase::TYPE_REAL )
 566                         {
 567                                 Action::Handle action(Action::create("value_desc_set"));
 568                                 assert(action);
 569
 570                                 action->set_param("canvas",get_canvas());
 571                                 action->set_param("canvas_interface",get_canvas_interface());
 572
 573                                 action->set_param("value_desc",desc);
 574                                 action->set_param("new_value",ValueBase(i->second));
 575                                 action->set_param("time",get_canvas_view()->get_time());
 576
 577                                 if(!action->is_ready() || !get_canvas_view()->get_instance()->perform_action(action))
 578                                 {
 579                                         group.cancel();
 580                                         synfig::warning("Changing the width action has failed");
 581                                         return Smach::RESULT_ERROR;
 582                                 }
 583                         }
 584                 }
 585
 586                 changetable.clear();
 587
 588                 get_work_area()->queue_draw();
 589
 590                 return Smach::RESULT_ACCEPT;
 591         }
 592
 593         return Smach::RESULT_OK;
 594 }
 595
 596
 597 void
 598 StateWidth_Context::refresh_ducks()
 599 {
 600         get_work_area()->clear_ducks();
 601         get_work_area()->queue_draw();
 602 }