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()->allow_layer_clicks),
 212         prev_workarea_duck_clicking(get_work_area()->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()->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()->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         // Hide the time bar
 292         //get_canvas_view()->hide_timebar();
 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()->allow_duck_clicks = prev_workarea_duck_clicking;
 331
 332         // Restore layer clicking
 333         get_work_area()->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         // Show the time bar
 345         if(get_canvas_view()->get_canvas()->rend_desc().get_time_start()!=get_canvas_view()->get_canvas()->rend_desc().get_time_end())
 346                 get_canvas_view()->show_timebar();
 347
 348         // Bring back the tables if they were out before
 349         //if(prev_table_status)get_canvas_view()->show_tables();
 350
 351         // Refresh the work area
 352         get_work_area()->queue_draw();
 353
 354         App::toolbox->refresh();
 355 }
 356
 357 Smach::event_result
 358 StateWidth_Context::event_stop_handler(const Smach::event& x)
 359 {
 360         throw Smach::egress_exception();
 361 }
 362
 363 Smach::event_result
 364 StateWidth_Context::event_refresh_handler(const Smach::event& x)
 365 {
 366         refresh_ducks();
 367         return Smach::RESULT_ACCEPT;
 368 }
 369
 370 void
 371 StateWidth_Context::AdjustWidth(handle<Duckmatic::Bezier> c, float t, Real mult, bool invert)
 372 {
 373         //Leave the function if there is no curve
 374         if(!c)return;
 375
 376         Real amount1=0,amount2=0;
 377
 378         //decide how much to change each width
 379         /*
 380         t \in [0,1]
 381
 382         both pressure and multiply amount are in mult
 383                 (may want to change this to allow different types of falloff)
 384
 385         rsq is the squared distance from the point on the curve (also part of the falloff)
 386
 387
 388         */
 389         //may want to provide a different falloff function...
 390         if(t <= 0.2)
 391                 amount1 = mult;
 392         else if(t >= 0.8)
 393                 amount2 = mult;
 394         else
 395         {
 396                 t = (t-0.2)/0.6;
 397                 amount1 = (1-t)*mult;
 398                 amount2 = t*mult;
 399         }
 400
 401         if(invert)
 402         {
 403                 amount1 *= -1;
 404                 amount2 *= -1;
 405         }
 406
 407         handle<Duck>    p1 = c->p1;
 408         handle<Duck>    p2 = c->p2;
 409
 410         handle<Duck>    w1,w2;
 411
 412         //find w1,w2
 413         {
 414                 const DuckList dl = get_work_area()->get_duck_list();
 415
 416                 DuckList::const_iterator i = dl.begin();
 417
 418                 for(;i != dl.end(); ++i)
 419                 {
 420                         if((*i)->get_type() == Duck::TYPE_WIDTH)
 421                         {
 422                                 if((*i)->get_origin_duck() == p1)
 423                                 {
 424                                         w1 = *i;
 425                                 }
 426
 427                                 if((*i)->get_origin_duck() == p2)
 428                                 {
 429                                         w2 = *i;
 430                                 }
 431                         }
 432                 }
 433         }
 434
 435         if(amount1 != 0 && w1)
 436         {
 437                 Real width = w1->get_point().mag();
 438
 439                 width += amount1;
 440                 w1->set_point(Vector(width,0));
 441
 442                 //log in the list of changes...
 443                 //to truly be changed after everything is said and done
 444                 changetable[w1] = width;
 445         }
 446
 447         if(amount2 != 0 && w2)
 448         {
 449                 Real width = w2->get_point().mag();
 450
 451                 width += amount2;
 452                 w2->set_point(Vector(width,0));
 453
 454                 //log in the list of changes...
 455                 //to truly be changed after everything is said and done
 456                 changetable[w2] = width;
 457         }
 458 }
 459
 460 Smach::event_result
 461 StateWidth_Context::event_mouse_handler(const Smach::event& x)
 462 {
 463         const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
 464
 465         //handle ze click
 466         if( (event.key == EVENT_WORKAREA_MOUSE_BUTTON_DOWN || event.key == EVENT_WORKAREA_MOUSE_BUTTON_DRAG)
 467                         && event.button == BUTTON_LEFT )
 468         {
 469                 const Real pw = get_work_area()->get_pw();
 470                 const Real ph = get_work_area()->get_ph();
 471                 const Real scale = sqrt(pw*pw+ph*ph);
 472                 const Real rad = get_relative() ? scale * get_radius() : get_radius();
 473
 474                 bool invert = (event.modifier&Gdk::CONTROL_MASK);
 475
 476                 const Real threshold = 0.08;
 477
 478                 float t = 0;
 479                 Real rsq = 0;
 480
 481                 Real dtime = 1/60.0;
 482
 483                 //if we're dragging get the difference in time between now and then
 484                 if(event.key == EVENT_WORKAREA_MOUSE_BUTTON_DRAG)
 485                 {
 486                         dtime = min(1/15.0,clocktime());
 487                 }
 488                 clocktime.reset();
 489
 490                 //make way for new ducks
 491                 //get_work_area()->clear_ducks();
 492
 493                 //update positions
 494                 //mouse_pos = event.pos;
 495
 496                 center->set_point(event.pos);
 497                 if(!added)get_work_area()->add_duck(center);
 498
 499                 radius->set_scalar(rad);
 500                 if(!added)get_work_area()->add_duck(radius);
 501
 502                 //the other duck is at the current duck
 503                 closestpoint->set_point(event.pos);
 504                 if(!added)get_work_area()->add_duck(closestpoint);
 505
 506                 //get the closest curve...
 507                 handle<Duckmatic::Bezier>       c;
 508                 if(event.pressure >= threshold)
 509                         c = get_work_area()->find_bezier(event.pos,scale*8,rad,&t);
 510
 511                 //run algorithm on event.pos to get 2nd placement
 512                 if(!c.empty())
 513                 {
 514                         bezier<Point> curve;
 515                         Point p;
 516
 517                         curve[0] = c->p1->get_trans_point();
 518                         curve[1] = c->c1->get_trans_point();
 519                         curve[2] = c->c2->get_trans_point();
 520                         curve[3] = c->p2->get_trans_point();
 521
 522                         p = curve(t);
 523                         rsq = (p-event.pos).mag_squared();
 524
 525                         const Real r = rad*rad;
 526
 527                         if(rsq < r)
 528                         {
 529                                 closestpoint->set_point(curve(t));
 530
 531                                 //adjust the width...
 532                                 //squared falloff for radius... [0,1]
 533
 534                                 Real ri = (r - rsq)/r;
 535                                 AdjustWidth(c,t,ri*event.pressure*get_delta()*dtime,invert);
 536                         }
 537                 }
 538
 539                 //the points have been added
 540                 added = true;
 541
 542                 //draw where it is yo!
 543                 get_work_area()->queue_draw();
 544
 545                 return Smach::RESULT_ACCEPT;
 546         }
 547
 548         if(event.key == EVENT_WORKAREA_MOUSE_BUTTON_UP && event.button == BUTTON_LEFT)
 549         {
 550                 if(added)
 551                 {
 552                         get_work_area()->erase_duck(center);
 553                         get_work_area()->erase_duck(radius);
 554                         get_work_area()->erase_duck(closestpoint);
 555                         added = false;
 556                 }
 557
 558                 //Affect the width changes here...
 559                 map<handle<Duck>,Real>::iterator i = changetable.begin();
 560
 561                 synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Sketch Width"));
 562                 for(; i != changetable.end(); ++i)
 563                 {
 564                         //for each duck modify IT!!!
 565                         ValueDesc desc = i->first->get_value_desc();
 566
 567                         if(     desc.get_value_type() == ValueBase::TYPE_REAL )
 568                         {
 569                                 Action::Handle action(Action::create("value_desc_set"));
 570                                 assert(action);
 571
 572                                 action->set_param("canvas",get_canvas());
 573                                 action->set_param("canvas_interface",get_canvas_interface());
 574
 575                                 action->set_param("value_desc",desc);
 576                                 action->set_param("new_value",ValueBase(i->second));
 577                                 action->set_param("time",get_canvas_view()->get_time());
 578
 579                                 if(!action->is_ready() || !get_canvas_view()->get_instance()->perform_action(action))
 580                                 {
 581                                         group.cancel();
 582                                         synfig::warning("Changing the width action has failed");
 583                                         return Smach::RESULT_ERROR;
 584                                 }
 585                         }
 586                 }
 587
 588                 changetable.clear();
 589
 590                 get_work_area()->queue_draw();
 591
 592                 return Smach::RESULT_ACCEPT;
 593         }
 594
 595         return Smach::RESULT_OK;
 596 }
 597
 598
 599 void
 600 StateWidth_Context::refresh_ducks()
 601 {
 602         get_work_area()->clear_ducks();
 603         get_work_area()->queue_draw();
 604 }