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