source/container.cpp

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