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 #endif
  59
  60 /* === U S I N G =========================================================== */
  61
  62 using namespace std;
  63 using namespace etl;
  64 using namespace synfig;
  65 using namespace synfigapp;
  66 using namespace studio;
  67
  68 /* === M A C R O S ========================================================= */
  69
  70 /* === G L O B A L S ======================================================= */
  71
  72 StateWidth studio::state_width;
  73
  74 /* === C L A S S E S & S T R U C T S ======================================= */
  75
  76 class studio::StateWidth_Context : public sigc::trackable
  77 {
  78         etl::handle<CanvasView> canvas_view_;
  79         CanvasView::IsWorking is_working;
  80
  81         //Point mouse_pos;
  82
  83         handle<Duck> center;
  84         handle<Duck> radius;
  85         handle<Duck> closestpoint;
  86
  87         map<handle<Duck>,Real>  changetable;
  88
  89         etl::clock      clocktime;
  90         Real            lastt;
  91
  92         bool added;
  93
  94         void refresh_ducks();
  95
  96         bool prev_workarea_layer_clicking;
  97         bool prev_workarea_duck_clicking;
  98         Duckmatic::Type old_duckmask;
  99
 100         //Toolbox settings
 101         synfigapp::Settings& settings;
 102
 103         //Toolbox display
 104         Gtk::Table options_table;
 105
 106         //Gtk::Entry            entry_id; //what to name the layer
 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 StateGradient_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         //options_table.attach(entry_id, 0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 230
 231         //expand stuff
 232         options_table.attach(*manage(new Gtk::Label(_("Growth:"))), 0, 1, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 233         options_table.attach(spin_delta, 1, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 234
 235         options_table.attach(*manage(new Gtk::Label(_("Radius:"))), 0, 1, 2, 3, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 236         options_table.attach(spin_radius, 1, 2, 2, 3, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 237
 238         options_table.attach(check_relative, 0, 2, 3, 4, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 239
 240         options_table.show_all();
 241
 242         refresh_tool_options();
 243         App::dialog_tool_options->present();
 244
 245         // Turn off layer clicking
 246         get_work_area()->set_allow_layer_clicks(false);
 247
 248         // clear out the ducks
 249         //get_work_area()->clear_ducks();
 250
 251         // Refresh the work area
 252         get_work_area()->queue_draw();
 253
 254         //Create the new ducks
 255         added = false;
 256
 257         if(!center)
 258         {
 259                 center = new Duck();
 260                 center->set_name("p1");
 261                 center->set_type(Duck::TYPE_POSITION);
 262         }
 263
 264         if(!radius)
 265         {
 266                 radius = new Duck();
 267                 radius->set_origin(center);
 268                 radius->set_radius(true);
 269                 radius->set_type(Duck::TYPE_RADIUS);
 270                 radius->set_name("radius");
 271         }
 272
 273         if(!closestpoint)
 274         {
 275                 closestpoint = new Duck();
 276                 closestpoint->set_name("closest");
 277                 closestpoint->set_type(Duck::TYPE_POSITION);
 278         }
 279
 280         //Disable duck clicking for the maximum coolness :)
 281         get_work_area()->set_allow_duck_clicks(false);
 282         get_work_area()->set_type_mask((Duck::Type)((int)Duck::TYPE_WIDTH + (int)Duck::TYPE_RADIUS));
 283
 284         // Turn the mouse pointer to crosshairs
 285         get_work_area()->set_cursor(Gdk::CROSSHAIR);
 286
 287         // Hide the tables if they are showing
 288         //prev_table_status=get_canvas_view()->tables_are_visible();
 289         //if(prev_table_status)get_canvas_view()->hide_tables();
 290
 291         // Disable the time bar
 292         //get_canvas_view()->set_sensitive_timebar(false);
 293
 294         // Connect a signal
 295         //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StateWidth_Context::on_user_click));
 296
 297         App::toolbox->refresh();
 298 }
 299
 300 void
 301 StateWidth_Context::refresh_tool_options()
 302 {
 303         App::dialog_tool_options->clear();
 304         App::dialog_tool_options->set_widget(options_table);
 305         App::dialog_tool_options->set_local_name(_("Width Tool"));
 306         App::dialog_tool_options->set_name("width");
 307 }
 308
 309 Smach::event_result
 310 StateWidth_Context::event_refresh_tool_options(const Smach::event& /*x*/)
 311 {
 312         refresh_tool_options();
 313         return Smach::RESULT_ACCEPT;
 314 }
 315
 316 StateWidth_Context::~StateWidth_Context()
 317 {
 318         save_settings();
 319
 320         //remove ducks if need be
 321         if(added)
 322         {
 323                 get_work_area()->erase_duck(center);
 324                 get_work_area()->erase_duck(radius);
 325                 get_work_area()->erase_duck(closestpoint);
 326                 added = false;
 327         }
 328
 329         // Restore Duck clicking
 330         get_work_area()->set_allow_duck_clicks(prev_workarea_duck_clicking);
 331
 332         // Restore layer clicking
 333         get_work_area()->set_allow_layer_clicks(prev_workarea_layer_clicking);
 334
 335         // Restore the mouse pointer
 336         get_work_area()->reset_cursor();
 337
 338         // Restore duck masking
 339         get_work_area()->set_type_mask(old_duckmask);
 340
 341         // Tool options be rid of ye!!
 342         App::dialog_tool_options->clear();
 343
 344         // Enable the time bar
 345         //get_canvas_view()->set_sensitive_timebar(true);
 346
 347         // Bring back the tables if they were out before
 348         //if(prev_table_status)get_canvas_view()->show_tables();
 349
 350         // Refresh the work area
 351         get_work_area()->queue_draw();
 352
 353         App::toolbox->refresh();
 354 }
 355
 356 Smach::event_result
 357 StateWidth_Context::event_stop_handler(const Smach::event& /*x*/)
 358 {
 359         throw Smach::egress_exception();
 360 }
 361
 362 Smach::event_result
 363 StateWidth_Context::event_refresh_handler(const Smach::event& /*x*/)
 364 {
 365         refresh_ducks();
 366         return Smach::RESULT_ACCEPT;
 367 }
 368
 369 void
 370 StateWidth_Context::AdjustWidth(handle<Duckmatic::Bezier> c, float t, Real mult, bool invert)
 371 {
 372         //Leave the function if there is no curve
 373         if(!c)return;
 374
 375         Real amount1=0,amount2=0;
 376
 377         //decide how much to change each width
 378         /*
 379         t \in [0,1]
 380
 381         both pressure and multiply amount are in mult
 382                 (may want to change this to allow different types of falloff)
 383
 384         rsq is the squared distance from the point on the curve (also part of the falloff)
 385
 386
 387         */
 388         //may want to provide a different falloff function...
 389         if(t <= 0.2)
 390                 amount1 = mult;
 391         else if(t >= 0.8)
 392                 amount2 = mult;
 393         else
 394         {
 395                 t = (t-0.2)/0.6;
 396                 amount1 = (1-t)*mult;
 397                 amount2 = t*mult;
 398         }
 399
 400         if(invert)
 401         {
 402                 amount1 *= -1;
 403                 amount2 *= -1;
 404         }
 405
 406         handle<Duck>    p1 = c->p1;
 407         handle<Duck>    p2 = c->p2;
 408
 409         handle<Duck>    w1,w2;
 410
 411         //find w1,w2
 412         {
 413                 const DuckList dl = get_work_area()->get_duck_list();
 414
 415                 DuckList::const_iterator i = dl.begin();
 416
 417                 for(;i != dl.end(); ++i)
 418                 {
 419                         if((*i)->get_type() == Duck::TYPE_WIDTH)
 420                         {
 421                                 if((*i)->get_origin_duck() == p1)
 422                                 {
 423                                         w1 = *i;
 424                                 }
 425
 426                                 if((*i)->get_origin_duck() == p2)
 427                                 {
 428                                         w2 = *i;
 429                                 }
 430                         }
 431                 }
 432         }
 433
 434         if(amount1 != 0 && w1)
 435         {
 436                 Real width = w1->get_point().mag();
 437
 438                 width += amount1;
 439                 w1->set_point(Vector(width,0));
 440
 441                 //log in the list of changes...
 442                 //to truly be changed after everything is said and done
 443                 changetable[w1] = width;
 444         }
 445
 446         if(amount2 != 0 && w2)
 447         {
 448                 Real width = w2->get_point().mag();
 449
 450                 width += amount2;
 451                 w2->set_point(Vector(width,0));
 452
 453                 //log in the list of changes...
 454                 //to truly be changed after everything is said and done
 455                 changetable[w2] = width;
 456         }
 457 }
 458
 459 Smach::event_result
 460 StateWidth_Context::event_mouse_handler(const Smach::event& x)
 461 {
 462         const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
 463
 464         //handle ze click
 465         if( (event.key == EVENT_WORKAREA_MOUSE_BUTTON_DOWN || event.key == EVENT_WORKAREA_MOUSE_BUTTON_DRAG)
 466                         && event.button == BUTTON_LEFT )
 467         {
 468                 const Real pw = get_work_area()->get_pw();
 469                 const Real ph = get_work_area()->get_ph();
 470                 const Real scale = sqrt(pw*pw+ph*ph);
 471                 const Real rad = get_relative() ? scale * get_radius() : get_radius();
 472
 473                 bool invert = (event.modifier&Gdk::CONTROL_MASK);
 474
 475                 const Real threshold = 0.08;
 476
 477                 float t = 0;
 478                 Real rsq = 0;
 479
 480                 Real dtime = 1/60.0;
 481
 482                 //if we're dragging get the difference in time between now and then
 483                 if(event.key == EVENT_WORKAREA_MOUSE_BUTTON_DRAG)
 484                 {
 485                         dtime = min(1/15.0,clocktime());
 486                 }
 487                 clocktime.reset();
 488
 489                 //make way for new ducks
 490                 //get_work_area()->clear_ducks();
 491
 492                 //update positions
 493                 //mouse_pos = event.pos;
 494
 495                 center->set_point(event.pos);
 496                 if(!added)get_work_area()->add_duck(center);
 497
 498                 radius->set_scalar(rad);
 499                 if(!added)get_work_area()->add_duck(radius);
 500
 501                 //the other duck is at the current duck
 502                 closestpoint->set_point(event.pos);
 503                 if(!added)get_work_area()->add_duck(closestpoint);
 504
 505                 //get the closest curve...
 506                 handle<Duckmatic::Bezier>       c;
 507                 if(event.pressure >= threshold)
 508                         c = get_work_area()->find_bezier(event.pos,scale*8,rad,&t);
 509
 510                 //run algorithm on event.pos to get 2nd placement
 511                 if(!c.empty())
 512                 {
 513                         bezier<Point> curve;
 514                         Point p;
 515
 516                         curve[0] = c->p1->get_trans_point();
 517                         curve[1] = c->c1->get_trans_point();
 518                         curve[2] = c->c2->get_trans_point();
 519                         curve[3] = c->p2->get_trans_point();
 520
 521                         p = curve(t);
 522                         rsq = (p-event.pos).mag_squared();
 523
 524                         const Real r = rad*rad;
 525
 526                         if(rsq < r)
 527                         {
 528                                 closestpoint->set_point(curve(t));
 529
 530                                 //adjust the width...
 531                                 //squared falloff for radius... [0,1]
 532
 533                                 Real ri = (r - rsq)/r;
 534                                 AdjustWidth(c,t,ri*event.pressure*get_delta()*dtime,invert);
 535                         }
 536                 }
 537
 538                 //the points have been added
 539                 added = true;
 540
 541                 //draw where it is yo!
 542                 get_work_area()->queue_draw();
 543
 544                 return Smach::RESULT_ACCEPT;
 545         }
 546
 547         if(event.key == EVENT_WORKAREA_MOUSE_BUTTON_UP && event.button == BUTTON_LEFT)
 548         {
 549                 if(added)
 550                 {
 551                         get_work_area()->erase_duck(center);
 552                         get_work_area()->erase_duck(radius);
 553                         get_work_area()->erase_duck(closestpoint);
 554                         added = false;
 555                 }
 556
 557                 //Affect the width changes here...
 558                 map<handle<Duck>,Real>::iterator i = changetable.begin();
 559
 560                 synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Sketch Width"));
 561                 for(; i != changetable.end(); ++i)
 562                 {
 563                         //for each duck modify IT!!!
 564                         ValueDesc desc = i->first->get_value_desc();
 565
 566                         if(     desc.get_value_type() == ValueBase::TYPE_REAL )
 567                         {
 568                                 Action::Handle action(Action::create("value_desc_set"));
 569                                 assert(action);
 570
 571                                 action->set_param("canvas",get_canvas());
 572                                 action->set_param("canvas_interface",get_canvas_interface());
 573
 574                                 action->set_param("value_desc",desc);
 575                                 action->set_param("new_value",ValueBase(i->second));
 576                                 action->set_param("time",get_canvas_view()->get_time());
 577
 578                                 if(!action->is_ready() || !get_canvas_view()->get_instance()->perform_action(action))
 579                                 {
 580                                         group.cancel();
 581                                         synfig::warning("Changing the width action has failed");
 582                                         return Smach::RESULT_ERROR;
 583                                 }
 584                         }
 585                 }
 586
 587                 changetable.clear();
 588
 589                 get_work_area()->queue_draw();
 590
 591                 return Smach::RESULT_ACCEPT;
 592         }
 593
 594         return Smach::RESULT_OK;
 595 }
 596
 597
 598 void
 599 StateWidth_Context::refresh_ducks()
 600 {
 601         get_work_area()->clear_ducks();
 602         get_work_area()->queue_draw();
 603 }