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
 155                 if(input_focus)
 156                 {
 157                         raise(*wdg);
 158                         input_focus->focus_in();
 159                 }
 160         }
 161 }
 162
 163 Widget *Container::get_final_input_focus() const
 164 {
 165         if(Container *container = dynamic_cast<Container *>(input_focus))
 166                 if(Widget *focus = container->get_final_input_focus())
 167                         return focus;
 168
 169         return input_focus;
 170 }
 171
 172 void Container::check_animation_interval()
 173 {
 174         Time::TimeDelta shortest;
 175         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 176         {
 177                 const Time::TimeDelta &child_iv = (*i)->widget->get_animation_interval();
 178                 if(child_iv && (!shortest || child_iv<shortest))
 179                         shortest = child_iv;
 180         }
 181
 182         if(shortest!=anim_interval)
 183                 set_animation_interval(shortest);
 184 }
 185
 186 void Container::button_press(int x, int y, unsigned btn)
 187 {
 188         if(Widget *child = get_pointer_target(x, y, false))
 189         {
 190                 if(!click_focus)
 191                 {
 192                         set_pointer_focus(child);
 193                         if(child->is_focusable())
 194                                 set_input_focus(child);
 195
 196                         click_focus = child;
 197                         click_button = btn;
 198                 }
 199
 200                 const Geometry &cgeom = child->get_geometry();
 201                 child->button_press(x-cgeom.x, y-cgeom.y, btn);
 202         }
 203 }
 204
 205 void Container::button_release(int x, int y, unsigned btn)
 206 {
 207         if(Widget *child = get_pointer_target(x, y, false))
 208         {
 209                 if(child==click_focus && btn==click_button)
 210                 {
 211                         click_focus = 0;
 212                         if(!pointer_focus)
 213                                 set_pointer_focus(get_child_at(x, y));
 214                 }
 215
 216                 const Geometry &cgeom = child->get_geometry();
 217                 child->button_release(x-cgeom.x, y-cgeom.y, btn);
 218         }
 219 }
 220
 221 void Container::pointer_motion(int x, int y)
 222 {
 223         Widget *child = get_pointer_target(x, y, false);
 224         if(!pointer_grabbed)
 225                 set_pointer_focus((!click_focus || child->get_geometry().is_inside(x, y)) ? child : 0);
 226
 227         if(child)
 228         {
 229                 const Geometry &cgeom = child->get_geometry();
 230                 child->pointer_motion(x-cgeom.x, y-cgeom.y);
 231         }
 232 }
 233
 234 Widget *Container::get_pointer_target(int x, int y, bool touch) const
 235 {
 236         if(pointer_grabbed)
 237                 return pointer_focus;
 238         else if(!touch && click_focus)
 239                 return click_focus;
 240         else if(touch && touch_focus)
 241                 return touch_focus;
 242         else
 243         {
 244                 Widget *child = get_child_at(x, y);
 245                 if(child && child->is_enabled())
 246                         return child;
 247                 else
 248                         return 0;
 249         }
 250 }
 251
 252 void Container::pointer_leave()
 253 {
 254         Widget::pointer_leave();
 255         set_pointer_focus(0);
 256 }
 257
 258 void Container::touch_press(int x, int y, unsigned finger)
 259 {
 260         if(Widget *child = get_pointer_target(x, y, true))
 261         {
 262                 // TODO track focus for each finger separately
 263                 if(!touch_focus)
 264                         touch_focus = child;
 265
 266                 const Geometry &cgeom = child->get_geometry();
 267                 child->touch_press(x-cgeom.x, y-cgeom.y, finger);
 268         }
 269 }
 270
 271 void Container::touch_release(int x, int y, unsigned finger)
 272 {
 273         if(Widget *child = get_pointer_target(x, y, true))
 274         {
 275                 // TODO track focus for each finger separately
 276                 if(child==touch_focus)
 277                         touch_focus = 0;
 278
 279                 const Geometry &cgeom = child->get_geometry();
 280                 child->touch_release(x-cgeom.x, y-cgeom.y, finger);
 281         }
 282 }
 283
 284 void Container::touch_motion(int x, int y, unsigned finger)
 285 {
 286         if(Widget *child = get_pointer_target(x, y, true))
 287         {
 288                 const Geometry &cgeom = child->get_geometry();
 289                 child->touch_motion(x-cgeom.x, y-cgeom.y, finger);
 290         }
 291 }
 292
 293 bool Container::key_press(unsigned key, unsigned mod)
 294 {
 295         if(input_focus && input_focus->is_enabled())
 296                 return input_focus->key_press(key, mod);
 297         else
 298                 return false;
 299 }
 300
 301 bool Container::key_release(unsigned key, unsigned mod)
 302 {
 303         if(input_focus && input_focus->is_enabled())
 304                 return input_focus->key_release(key, mod);
 305         else
 306                 return false;
 307 }
 308
 309 bool Container::character(wchar_t ch)
 310 {
 311         if(input_focus && input_focus->is_enabled())
 312                 return input_focus->character(ch);
 313         else
 314                 return false;
 315 }
 316
 317 void Container::focus_out()
 318 {
 319         set_input_focus(0);
 320         Widget::focus_out();
 321 }
 322
 323 bool Container::navigate(Navigation nav)
 324 {
 325         if(input_focus && input_focus->is_enabled())
 326                 return input_focus->navigate(nav);
 327         else
 328                 return false;
 329 }
 330
 331 void Container::animate(const Time::TimeDelta &dt)
 332 {
 333         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 334         {
 335                 const Time::TimeDelta &child_iv = (*i)->widget->get_animation_interval();
 336                 if(!child_iv)
 337                         continue;
 338
 339                 (*i)->time_since_animate += dt;
 340                 if((*i)->time_since_animate>=child_iv)
 341                 {
 342                         Time::TimeDelta child_dt = (*i)->time_since_animate;
 343                         (*i)->time_since_animate = min((*i)->time_since_animate-child_iv, child_iv);
 344                         (*i)->widget->animate(child_dt);
 345                 }
 346         }
 347 }
 348
 349 void Container::on_reparent()
 350 {
 351         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 352         {
 353                 if(Container *c = dynamic_cast<Container *>((*i)->widget))
 354                         c->on_reparent();
 355                 (*i)->widget->update_style();
 356         }
 357 }
 358
 359
 360 Container::Child::Child(Container &c, Widget *w):
 361         container(c),
 362         widget(w)
 363 {
 364         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 365         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 366         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 367         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 368         widget->signal_request_animation.connect(sigc::mem_fun(this, &Child::request_animation));
 369 }
 370
 371 Container::Child::~Child()
 372 {
 373         visibility_changed(false);
 374 }
 375
 376 void Container::Child::visibility_changed(bool v)
 377 {
 378         if(!v)
 379         {
 380                 if(widget==container.click_focus)
 381                         container.click_focus = 0;
 382                 if(widget==container.pointer_focus)
 383                         container.set_pointer_focus(0);
 384                 if(widget==container.input_focus)
 385                         container.set_input_focus(0);
 386         }
 387 }
 388
 389 void Container::Child::request_focus()
 390 {
 391         if(container.parent && container.visible)
 392                 container.set_focus();
 393         if(container.state&FOCUS)
 394                 container.set_input_focus(widget);
 395 }
 396
 397 void Container::Child::grab_pointer()
 398 {
 399         if(!container.pointer_grabbed)
 400         {
 401                 container.set_pointer_focus(widget);
 402                 container.pointer_grabbed = true;
 403                 container.signal_grab_pointer.emit();
 404         }
 405 }
 406
 407 void Container::Child::ungrab_pointer()
 408 {
 409         if(container.pointer_grabbed && container.pointer_focus==widget)
 410         {
 411                 // XXX Should set to the widget under pointer
 412                 container.set_pointer_focus(0);
 413                 container.pointer_grabbed = false;
 414                 container.signal_ungrab_pointer.emit();
 415         }
 416 }
 417
 418 void Container::Child::request_animation(const Time::TimeDelta &interval)
 419 {
 420         if(!interval)
 421                 time_since_animate = Time::zero;
 422         container.check_animation_interval();
 423 }
 424
 425 } // namespace GLtk
 426 } // namespace Msp