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