synfig-studio/src/gui/states/state_rotate.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file state_rotate.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) 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 <gtkmm/dialog.h>
  34 #include <gtkmm/entry.h>
  35
  36 #include <synfig/valuenode_dynamiclist.h>
  37 #include <synfigapp/action_system.h>
  38
  39 #include "state_rotate.h"
  40 #include "state_normal.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 "docks/dialog_tooloptions.h"
  50 #include <gtkmm/optionmenu.h>
  51 #include "duck.h"
  52 #include <synfig/angle.h>
  53 #include <synfigapp/main.h>
  54
  55 #include "general.h"
  56
  57 #endif
  58
  59 /* === U S I N G =========================================================== */
  60
  61 using namespace std;
  62 using namespace etl;
  63 using namespace synfig;
  64 using namespace studio;
  65
  66 /* === M A C R O S ========================================================= */
  67
  68 #ifndef EPSILON
  69 #define EPSILON 0.0000001
  70 #endif
  71
  72 /* === G L O B A L S ======================================================= */
  73
  74 StateRotate studio::state_rotate;
  75
  76 /* === C L A S S E S & S T R U C T S ======================================= */
  77
  78 class DuckDrag_Rotate : public DuckDrag_Base
  79 {
  80
  81         synfig::Vector last_rotate;
  82         synfig::Vector drag_offset;
  83         synfig::Vector center;
  84         synfig::Vector snap;
  85
  86         Angle original_angle;
  87         Real original_mag;
  88
  89         std::vector<synfig::Vector> positions;
  90
  91
  92         bool bad_drag;
  93         bool move_only;
  94
  95 public:
  96         etl::handle<CanvasView> canvas_view_;
  97         bool use_magnitude;
  98         DuckDrag_Rotate();
  99         void begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& begin);
 100         bool end_duck_drag(Duckmatic* duckmatic);
 101         void duck_drag(Duckmatic* duckmatic, const synfig::Vector& vector);
 102
 103         etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
 104 };
 105
 106
 107 class studio::StateRotate_Context : public sigc::trackable
 108 {
 109         etl::handle<CanvasView> canvas_view_;
 110         CanvasView::IsWorking is_working;
 111
 112         synfigapp::Settings& settings;
 113
 114         etl::handle<DuckDrag_Rotate> duck_dragger_;
 115
 116         Gtk::Table options_table;
 117
 118         Gtk::CheckButton checkbutton_scale;
 119
 120 public:
 121
 122         bool get_scale_flag()const { return checkbutton_scale.get_active(); }
 123         void set_scale_flag(bool x) { return checkbutton_scale.set_active(x); refresh_scale_flag(); }
 124
 125         Smach::event_result event_stop_handler(const Smach::event& x);
 126         Smach::event_result event_refresh_tool_options(const Smach::event& x);
 127
 128         void refresh_tool_options();
 129
 130         void refresh_scale_flag() { if(duck_dragger_)duck_dragger_->use_magnitude=get_scale_flag(); }
 131
 132         StateRotate_Context(CanvasView* canvas_view);
 133
 134         ~StateRotate_Context();
 135
 136         const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
 137         etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
 138         synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
 139         WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
 140
 141         void load_settings();
 142         void save_settings();
 143 };      // END of class StateRotate_Context
 144
 145 /* === M E T H O D S ======================================================= */
 146
 147 StateRotate::StateRotate():
 148         Smach::state<StateRotate_Context>("rotate")
 149 {
 150         insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StateRotate_Context::event_refresh_tool_options));
 151         insert(event_def(EVENT_STOP,&StateRotate_Context::event_stop_handler));
 152 }
 153
 154 StateRotate::~StateRotate()
 155 {
 156 }
 157
 158 void
 159 StateRotate_Context::load_settings()
 160 {
 161         try
 162         {
 163                 SETTINGS_LOCALE_SAFE_AND_BACKUP
 164                 String value;
 165
 166                 if(settings.get_value("rotate.scale",value) && value=="0")
 167                         set_scale_flag(false);
 168                 else
 169                         set_scale_flag(true);
 170                 SETTINGS_LOCALE_RESTORE
 171         }
 172         catch(...)
 173         {
 174                 synfig::warning("State Rotate: Caught exception when attempting to load settings.");
 175         }
 176 }
 177
 178 void
 179 StateRotate_Context::save_settings()
 180 {
 181         try
 182         {
 183                 SETTINGS_LOCALE_SAFE_AND_BACKUP
 184                 settings.set_value("rotate.scale",get_scale_flag()?"1":"0");
 185                 SETTINGS_LOCALE_RESTORE
 186         }
 187         catch(...)
 188         {
 189                 synfig::warning("State Rotate: Caught exception when attempting to save settings.");
 190         }
 191 }
 192
 193 StateRotate_Context::StateRotate_Context(CanvasView* canvas_view):
 194         canvas_view_(canvas_view),
 195         is_working(*canvas_view),
 196         settings(synfigapp::Main::get_selected_input_device()->settings()),
 197         duck_dragger_(new DuckDrag_Rotate()),
 198         checkbutton_scale(_("Allow Scale"))
 199 {
 200         duck_dragger_->canvas_view_=get_canvas_view();
 201
 202         // Set up the tool options dialog
 203         options_table.attach(*manage(new Gtk::Label(_("Rotate Tool"))), 0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 204         options_table.attach(checkbutton_scale,                                                 0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 205
 206         checkbutton_scale.signal_toggled().connect(sigc::mem_fun(*this,&StateRotate_Context::refresh_scale_flag));
 207
 208         options_table.show_all();
 209         refresh_tool_options();
 210         //App::dialog_tool_options->set_widget(options_table);
 211         App::dialog_tool_options->present();
 212
 213         get_work_area()->set_allow_layer_clicks(true);
 214         get_work_area()->set_duck_dragger(duck_dragger_);
 215
 216         get_work_area()->set_cursor(Gdk::EXCHANGE);
 217 //      get_work_area()->reset_cursor();
 218
 219         App::toolbox->refresh();
 220
 221         load_settings();
 222         refresh_scale_flag();
 223 }
 224
 225 void
 226 StateRotate_Context::refresh_tool_options()
 227 {
 228         App::dialog_tool_options->clear();
 229         App::dialog_tool_options->set_widget(options_table);
 230         App::dialog_tool_options->set_local_name(_("Rotate Tool"));
 231         App::dialog_tool_options->set_name("rotate");
 232 }
 233
 234 Smach::event_result
 235 StateRotate_Context::event_refresh_tool_options(const Smach::event& /*x*/)
 236 {
 237         refresh_tool_options();
 238         return Smach::RESULT_ACCEPT;
 239 }
 240
 241 Smach::event_result
 242 StateRotate_Context::event_stop_handler(const Smach::event& /*x*/)
 243 {
 244         throw &state_normal;
 245         return Smach::RESULT_OK;
 246 }
 247
 248 StateRotate_Context::~StateRotate_Context()
 249 {
 250         save_settings();
 251
 252         get_work_area()->clear_duck_dragger();
 253         get_work_area()->reset_cursor();
 254
 255         App::dialog_tool_options->clear();
 256
 257         App::toolbox->refresh();
 258 }
 259
 260
 261
 262
 263 DuckDrag_Rotate::DuckDrag_Rotate()
 264 {
 265         use_magnitude=true;
 266 }
 267
 268 void
 269 DuckDrag_Rotate::begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& offset)
 270 {
 271         last_rotate=Vector(1,1);
 272
 273         const DuckList selected_ducks(duckmatic->get_selected_ducks());
 274         DuckList::const_iterator iter;
 275
 276 /*
 277         if(duckmatic->get_selected_ducks().size()<2)
 278         {
 279                 bad_drag=true;
 280                 return;
 281         }
 282 */
 283         bad_drag=false;
 284
 285                 drag_offset=duckmatic->find_duck(offset)->get_trans_point();
 286
 287                 //snap=drag_offset-duckmatic->snap_point_to_grid(drag_offset);
 288                 //snap=offset-drag_offset;
 289                 snap=Vector(0,0);
 290
 291         // Calculate center
 292         Point vmin(100000000,100000000);
 293         Point vmax(-100000000,-100000000);
 294         //std::set<etl::handle<Duck> >::iterator iter;
 295         positions.clear();
 296         int i;
 297         for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
 298         {
 299                 Point p((*iter)->get_trans_point());
 300                 vmin[0]=min(vmin[0],p[0]);
 301                 vmin[1]=min(vmin[1],p[1]);
 302                 vmax[0]=max(vmax[0],p[0]);
 303                 vmax[1]=max(vmax[1],p[1]);
 304                 positions.push_back(p);
 305         }
 306         center=(vmin+vmax)*0.5;
 307         if((vmin-vmax).mag()<=EPSILON)
 308                 move_only=true;
 309         else
 310                 move_only=false;
 311
 312
 313         synfig::Vector vect(offset-center);
 314         original_angle=Angle::tan(vect[1],vect[0]);
 315         original_mag=vect.mag();
 316 }
 317
 318
 319 void
 320 DuckDrag_Rotate::duck_drag(Duckmatic* duckmatic, const synfig::Vector& vector)
 321 {
 322         if(bad_drag)
 323                 return;
 324
 325         //std::set<etl::handle<Duck> >::iterator iter;
 326         synfig::Vector vect(duckmatic->snap_point_to_grid(vector)-center+snap);
 327
 328         const DuckList selected_ducks(duckmatic->get_selected_ducks());
 329         DuckList::const_iterator iter;
 330
 331         if(move_only)
 332         {
 333                 int i;
 334                 for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
 335                 {
 336                         if((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION)continue;
 337
 338                         Vector p(positions[i]);
 339
 340                         p[0]+=vect[0];
 341                         p[1]+=vect[1];
 342                         (*iter)->set_trans_point(p);
 343                 }
 344                 for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
 345                 {
 346                         if(!((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;
 347
 348                         Vector p(positions[i]);
 349
 350                         p[0]+=vect[0];
 351                         p[1]+=vect[1];
 352                         (*iter)->set_trans_point(p);
 353                 }
 354                 return;
 355         }
 356
 357         Angle::tan angle(vect[1],vect[0]);
 358         angle=original_angle-angle;
 359         Real mag(vect.mag()/original_mag);
 360         Real sine(Angle::sin(angle).get());
 361         Real cosine(Angle::cos(angle).get());
 362
 363         int i;
 364         for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
 365         {
 366                 if((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION)continue;
 367
 368                 Vector x(positions[i]-center),p;
 369
 370                 p[0]=cosine*x[0]+sine*x[1];
 371                 p[1]=-sine*x[0]+cosine*x[1];
 372                 if(use_magnitude)p*=mag;
 373                 p+=center;
 374                 (*iter)->set_trans_point(p);
 375         }
 376         for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
 377         {
 378                 if(!((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;
 379
 380                 Vector x(positions[i]-center),p;
 381
 382                 p[0]=cosine*x[0]+sine*x[1];
 383                 p[1]=-sine*x[0]+cosine*x[1];
 384                 if(use_magnitude)p*=mag;
 385                 p+=center;
 386                 (*iter)->set_trans_point(p);
 387         }
 388
 389         last_rotate=vect;
 390         //snap=Vector(0,0);
 391 }
 392
 393 bool
 394 DuckDrag_Rotate::end_duck_drag(Duckmatic* duckmatic)
 395 {
 396         if(bad_drag)return false;
 397         if(move_only)
 398         {
 399                 synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Move Duck"));
 400                 duckmatic->signal_edited_selected_ducks();
 401                 return true;
 402         }
 403
 404         synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Rotate Ducks"));
 405
 406         if((last_rotate-Vector(1,1)).mag()>0.0001)
 407         {
 408                 duckmatic->signal_edited_selected_ducks();
 409                 return true;
 410         }
 411         else
 412         {
 413                 duckmatic->signal_user_click_selected_ducks(0);
 414                 return false;
 415         }
 416 }