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