source/container.cpp

   1 #include "container.h"
   2 #include "part.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GLtk {
   8
   9 hierarchy_error::hierarchy_error(const string &w):
  10         logic_error(w)
  11 { }
  12
  13
  14 Container::Container():
  15         click_focus(0),
  16         click_button(0),
  17         pointer_focus(0),
  18         pointer_grabbed(false),
  19         input_focus(0),
  20         saved_input_focus(0),
  21         touch_focus(0),
  22         children_rebuild_needed(false)
  23 { }
  24
  25 Container::~Container()
  26 {
  27         while(!children.empty())
  28                 delete children.front()->widget;
  29 }
  30
  31 void Container::add(Widget &wdg)
  32 {
  33         wdg.set_parent(this);
  34         children.push_back(create_child(&wdg));
  35         if(wdg.get_animation_interval())
  36                 check_animation_interval();
  37         children_rebuild_needed = true;
  38         on_child_added(wdg);
  39 }
  40
  41 void Container::remove(Widget &wdg)
  42 {
  43         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
  44                 if((*i)->widget==&wdg)
  45                 {
  46                         wdg.set_parent(0);
  47                         delete *i;
  48                         children.erase(i);
  49                         if(wdg.get_animation_interval())
  50                                 check_animation_interval();
  51                         on_child_removed(wdg);
  52                         return;
  53                 }
  54
  55         throw hierarchy_error("widget not in container");
  56 }
  57
  58 Container::Child *Container::create_child(Widget *wdg)
  59 {
  60         return new Child(*this, wdg);
  61 }
  62
  63 Geometry Container::determine_child_geometry(const Widget &child, const Part &part) const
  64 {
  65         Geometry pgeom = part.get_geometry();
  66         if(!pgeom.w || !pgeom.h)
  67         {
  68                 Geometry cgeom;
  69                 child.autosize(cgeom);
  70                 if(!pgeom.w)
  71                         pgeom.w = cgeom.w;
  72                 if(!pgeom.h)
  73                         pgeom.h = cgeom.h;
  74         }
  75
  76         part.get_alignment().apply(pgeom, geom, part.get_margin());
  77         return pgeom;
  78 }
  79
  80 void Container::autosize_child(const Widget &child, const Part &part, Geometry &ageom) const
  81 {
  82         Geometry cgeom = determine_child_geometry(child, part);
  83         const Sides &margin = part.get_margin();
  84         ageom.w = max(ageom.w, cgeom.w+margin.left+margin.right);
  85         ageom.h = max(ageom.h, cgeom.h+margin.top+margin.bottom);
  86 }
  87
  88 void Container::reposition_child(Widget &child, const Part &part) const
  89 {
  90         child.set_geometry(determine_child_geometry(child, part));
  91 }
  92
  93 list<Widget *> Container::get_children() const
  94 {
  95         list<Widget *> result;
  96         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
  97                 result.push_back((*i)->widget);
  98         return result;
  99 }
 100
 101 Widget *Container::get_child_at(int x, int y) const
 102 {
 103         for(list<Child *>::const_iterator i=children.end(); i!=children.begin();)
 104                 if((*--i)->widget->is_visible() && (*i)->widget->get_geometry().is_inside(x, y))
 105                         return (*i)->widget;
 106
 107         return 0;
 108 }
 109
 110 Widget *Container::get_descendant_at(int x, int y) const
 111 {
 112         Widget *wdg = get_child_at(x, y);
 113         if(Container *cont = dynamic_cast<Container *>(wdg))
 114         {
 115                 const Geometry &cgeom = wdg->get_geometry();
 116                 Widget *wdg2 = cont->get_descendant_at(x-cgeom.x, y-cgeom.y);
 117                 if(wdg2)
 118                         return wdg2;
 119         }
 120         return wdg;
 121 }
 122
 123 void Container::raise(Widget &wdg)
 124 {
 125         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 126                 if((*i)->widget==&wdg)
 127                 {
 128                         children.splice(children.end(), children, i);
 129                         return;
 130                 }
 131
 132         throw hierarchy_error("widget not in container");
 133 }
 134
 135 void Container::set_pointer_focus(Widget *wdg, bool grab)
 136 {
 137         if(wdg!=pointer_focus)
 138         {
 139                 if(pointer_focus)
 140                         pointer_focus->pointer_leave();
 141
 142                 pointer_focus = wdg;
 143                 pointer_grabbed = grab;
 144
 145                 if(pointer_focus)
 146                         pointer_focus->pointer_enter();
 147         }
 148         else
 149                 pointer_grabbed = grab;
 150 }
 151
 152 void Container::set_input_focus(Widget *wdg)
 153 {
 154         if(wdg!=input_focus)
 155         {
 156                 if(input_focus)
 157                         input_focus->focus_out();
 158
 159                 input_focus = wdg;
 160                 on_input_focus_changed(input_focus);
 161
 162                 if(input_focus)
 163                         input_focus->focus_in();
 164         }
 165 }
 166
 167 Widget *Container::get_final_input_focus() const
 168 {
 169         if(Container *container = dynamic_cast<Container *>(input_focus))
 170                 if(Widget *focus = container->get_final_input_focus())
 171                         return focus;
 172
 173         return input_focus;
 174 }
 175
 176 void Container::check_animation_interval()
 177 {
 178         Time::TimeDelta shortest;
 179         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 180         {
 181                 const Time::TimeDelta &child_iv = (*i)->widget->get_animation_interval();
 182                 if(child_iv && (!shortest || child_iv<shortest))
 183                         shortest = child_iv;
 184         }
 185
 186         if(shortest!=anim_interval)
 187                 set_animation_interval(shortest);
 188 }
 189
 190 void Container::rebuild_hierarchy()
 191 {
 192         Widget::rebuild_hierarchy();
 193
 194         if(children_rebuild_needed)
 195         {
 196                 children_rebuild_needed = false;
 197                 for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 198                         (*i)->widget->rebuild_hierarchy();
 199         }
 200 }
 201
 202 void Container::button_press(int x, int y, unsigned btn)
 203 {
 204         if(Widget *child = get_pointer_target(x, y, false))
 205         {
 206                 if(!click_focus)
 207                 {
 208                         set_pointer_focus(child);
 209                         if(child->is_focusable())
 210                                 set_input_focus(child);
 211
 212                         click_focus = child;
 213                         click_button = btn;
 214                 }
 215
 216                 const Geometry &cgeom = child->get_geometry();
 217                 child->button_press(x-cgeom.x, y-cgeom.y, btn);
 218         }
 219 }
 220
 221 void Container::button_release(int x, int y, unsigned btn)
 222 {
 223         if(Widget *child = get_pointer_target(x, y, false))
 224         {
 225                 if(child==click_focus && btn==click_button)
 226                 {
 227                         click_focus = 0;
 228                         if(!pointer_focus)
 229                                 set_pointer_focus(get_child_at(x, y));
 230                 }
 231
 232                 const Geometry &cgeom = child->get_geometry();
 233                 child->button_release(x-cgeom.x, y-cgeom.y, btn);
 234         }
 235 }
 236
 237 void Container::pointer_motion(int x, int y)
 238 {
 239         Widget *child = get_pointer_target(x, y, false);
 240         if(!pointer_grabbed)
 241                 set_pointer_focus((child && child->get_geometry().is_inside(x, y)) ? child : 0);
 242
 243         if(child)
 244         {
 245                 const Geometry &cgeom = child->get_geometry();
 246                 child->pointer_motion(x-cgeom.x, y-cgeom.y);
 247         }
 248 }
 249
 250 Widget *Container::get_pointer_target(int x, int y, bool touch) const
 251 {
 252         if(pointer_grabbed)
 253                 return pointer_focus;
 254         else if(!touch && click_focus)
 255                 return click_focus;
 256         else if(touch && touch_focus)
 257                 return touch_focus;
 258         else
 259         {
 260                 Widget *child = get_child_at(x, y);
 261                 if(child && child->is_enabled())
 262                         return child;
 263                 else
 264                         return 0;
 265         }
 266 }
 267
 268 void Container::pointer_leave()
 269 {
 270         Widget::pointer_leave();
 271         set_pointer_focus(0);
 272 }
 273
 274 void Container::touch_press(int x, int y, unsigned finger)
 275 {
 276         if(Widget *child = get_pointer_target(x, y, true))
 277         {
 278                 // TODO track focus for each finger separately
 279                 if(!touch_focus)
 280                         touch_focus = child;
 281
 282                 const Geometry &cgeom = child->get_geometry();
 283                 child->touch_press(x-cgeom.x, y-cgeom.y, finger);
 284         }
 285 }
 286
 287 void Container::touch_release(int x, int y, unsigned finger)
 288 {
 289         if(Widget *child = get_pointer_target(x, y, true))
 290         {
 291                 // TODO track focus for each finger separately
 292                 if(child==touch_focus)
 293                         touch_focus = 0;
 294
 295                 const Geometry &cgeom = child->get_geometry();
 296                 child->touch_release(x-cgeom.x, y-cgeom.y, finger);
 297         }
 298 }
 299
 300 void Container::touch_motion(int x, int y, unsigned finger)
 301 {
 302         if(Widget *child = get_pointer_target(x, y, true))
 303         {
 304                 const Geometry &cgeom = child->get_geometry();
 305                 child->touch_motion(x-cgeom.x, y-cgeom.y, finger);
 306         }
 307 }
 308
 309 bool Container::key_press(unsigned key, unsigned mod)
 310 {
 311         if(input_focus && input_focus->is_enabled())
 312                 return input_focus->key_press(key, mod);
 313         else
 314                 return false;
 315 }
 316
 317 bool Container::key_release(unsigned key, unsigned mod)
 318 {
 319         if(input_focus && input_focus->is_enabled())
 320                 return input_focus->key_release(key, mod);
 321         else
 322                 return false;
 323 }
 324
 325 bool Container::character(wchar_t ch)
 326 {
 327         if(input_focus && input_focus->is_enabled())
 328                 return input_focus->character(ch);
 329         else
 330                 return false;
 331 }
 332
 333 void Container::focus_in()
 334 {
 335         if(saved_input_focus && saved_input_focus->get_parent()==this)
 336                 set_input_focus(saved_input_focus);
 337         Widget::focus_in();
 338 }
 339
 340 void Container::focus_out()
 341 {
 342         saved_input_focus = input_focus;
 343         set_input_focus(0);
 344         Widget::focus_out();
 345 }
 346
 347 bool Container::navigate(Navigation nav)
 348 {
 349         if(input_focus && input_focus->is_enabled())
 350                 return input_focus->navigate(nav);
 351         else
 352                 return false;
 353 }
 354
 355 void Container::animate(const Time::TimeDelta &dt)
 356 {
 357         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 358         {
 359                 const Time::TimeDelta &child_iv = (*i)->widget->get_animation_interval();
 360                 if(!child_iv)
 361                         continue;
 362
 363                 (*i)->time_since_animate += dt;
 364                 if((*i)->time_since_animate>=child_iv)
 365                 {
 366                         Time::TimeDelta child_dt = (*i)->time_since_animate;
 367                         (*i)->time_since_animate = min((*i)->time_since_animate-child_iv, child_iv);
 368                         (*i)->widget->animate(child_dt);
 369                 }
 370         }
 371 }
 372
 373 void Container::on_reparent()
 374 {
 375         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 376         {
 377                 if(Container *c = dynamic_cast<Container *>((*i)->widget))
 378                         c->on_reparent();
 379                 (*i)->widget->update_style();
 380         }
 381 }
 382
 383 void Container::on_input_focus_changed(Widget *wdg)
 384 {
 385         if(wdg)
 386                 raise(*wdg);
 387 }
 388
 389
 390 Container::Child::Child(Container &c, Widget *w):
 391         container(c),
 392         widget(w)
 393 {
 394         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 395         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 396         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 397         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 398         widget->signal_request_animation.connect(sigc::mem_fun(this, &Child::request_animation));
 399         widget->signal_rebuild_needed.connect(sigc::mem_fun(this, &Child::rebuild_needed));
 400 }
 401
 402 Container::Child::~Child()
 403 {
 404         visibility_changed(false);
 405 }
 406
 407 void Container::Child::visibility_changed(bool v)
 408 {
 409         if(!v)
 410         {
 411                 if(widget==container.click_focus)
 412                         container.click_focus = 0;
 413                 if(widget==container.pointer_focus)
 414                         container.set_pointer_focus(0);
 415                 if(widget==container.input_focus)
 416                         container.set_input_focus(0);
 417         }
 418 }
 419
 420 void Container::Child::request_focus()
 421 {
 422         if(container.parent && container.visible)
 423                 container.set_focus();
 424         if(container.state&FOCUS)
 425                 container.set_input_focus(widget);
 426 }
 427
 428 void Container::Child::grab_pointer()
 429 {
 430         if(!container.pointer_grabbed)
 431         {
 432                 container.set_pointer_focus(widget, true);
 433                 container.signal_grab_pointer.emit();
 434         }
 435 }
 436
 437 void Container::Child::ungrab_pointer()
 438 {
 439         if(container.pointer_grabbed && container.pointer_focus==widget)
 440         {
 441                 // XXX Should set to the widget under pointer
 442                 container.set_pointer_focus(0);
 443                 container.signal_ungrab_pointer.emit();
 444         }
 445 }
 446
 447 void Container::Child::request_animation(const Time::TimeDelta &interval)
 448 {
 449         if(!interval)
 450                 time_since_animate = Time::zero;
 451         container.check_animation_interval();
 452 }
 453
 454 void Container::Child::rebuild_needed()
 455 {
 456         container.children_rebuild_needed = true;
 457         container.signal_rebuild_needed.emit();
 458 }
 459
 460 } // namespace GLtk
 461 } // namespace Msp