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(make_unique<Child>(*this, &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 unique_ptr<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         children.erase(i);
  42         if(wdg.get_animation_interval())
  43                 check_animation_interval();
  44         on_child_removed(wdg);
  45 }
  46
  47 Geometry Container::determine_child_geometry(const Widget &child, const Part &part) const
  48 {
  49         Geometry pgeom = part.get_geometry();
  50         if(!pgeom.w || !pgeom.h)
  51         {
  52                 Geometry cgeom;
  53                 child.autosize(cgeom);
  54                 if(!pgeom.w)
  55                         pgeom.w = cgeom.w;
  56                 if(!pgeom.h)
  57                         pgeom.h = cgeom.h;
  58         }
  59
  60         part.get_alignment().apply(pgeom, geom, part.get_margin());
  61         return pgeom;
  62 }
  63
  64 void Container::autosize_child(const Widget &child, const Part &part, Geometry &ageom) const
  65 {
  66         Geometry cgeom = determine_child_geometry(child, part);
  67         const Sides &margin = part.get_margin();
  68         ageom.w = max(ageom.w, cgeom.w+margin.left+margin.right);
  69         ageom.h = max(ageom.h, cgeom.h+margin.top+margin.bottom);
  70 }
  71
  72 void Container::reposition_child(Widget &child, const Part &part) const
  73 {
  74         child.set_geometry(determine_child_geometry(child, part));
  75 }
  76
  77 vector<Widget *> Container::get_children() const
  78 {
  79         vector<Widget *> result;
  80         for(const unique_ptr<Child> &c: children)
  81                 result.push_back(c->widget);
  82         return result;
  83 }
  84
  85 Widget *Container::find_child_at(int x, int y) const
  86 {
  87         for(auto i=children.end(); i!=children.begin();)
  88                 if((*--i)->widget->is_visible() && (*i)->widget->get_geometry().is_inside(x, y))
  89                         return (*i)->widget;
  90
  91         return nullptr;
  92 }
  93
  94 Widget *Container::find_descendant_at(int x, int y) const
  95 {
  96         Widget *wdg = find_child_at(x, y);
  97         if(Container *cont = dynamic_cast<Container *>(wdg))
  98         {
  99                 const Geometry &cgeom = wdg->get_geometry();
 100                 if(Widget *wdg2 = cont->find_descendant_at(x-cgeom.x, y-cgeom.y))
 101                         return wdg2;
 102         }
 103         return wdg;
 104 }
 105
 106 void Container::raise(Widget &wdg)
 107 {
 108         auto i = find_if(children, [&wdg](const unique_ptr<Child> &c){ return c->widget==&wdg; });
 109         if(i==children.end())
 110                 throw hierarchy_error("widget not in container");
 111
 112         unique_ptr<Child> c = move(*i);
 113         children.erase(i);
 114         children.push_back(move(c));
 115 }
 116
 117 void Container::set_pointer_focus(Widget *wdg, bool grab)
 118 {
 119         if(wdg!=pointer_focus)
 120         {
 121                 if(pointer_focus)
 122                         pointer_focus->pointer_leave();
 123
 124                 pointer_focus = wdg;
 125                 pointer_grabbed = grab;
 126
 127                 if(pointer_focus)
 128                         pointer_focus->pointer_enter();
 129         }
 130         else
 131                 pointer_grabbed = grab;
 132 }
 133
 134 void Container::set_input_focus(Widget *wdg)
 135 {
 136         if(wdg!=input_focus)
 137         {
 138                 if(input_focus)
 139                         input_focus->focus_out();
 140
 141                 input_focus = wdg;
 142                 on_input_focus_changed(input_focus);
 143
 144                 if(input_focus)
 145                         input_focus->focus_in();
 146         }
 147 }
 148
 149 Widget *Container::get_final_input_focus() const
 150 {
 151         if(Container *container = dynamic_cast<Container *>(input_focus))
 152                 if(Widget *focus = container->get_final_input_focus())
 153                         return focus;
 154
 155         return input_focus;
 156 }
 157
 158 void Container::check_animation_interval()
 159 {
 160         Time::TimeDelta shortest;
 161         for(const unique_ptr<Child> &c: children)
 162         {
 163                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 164                 if(child_iv && (!shortest || child_iv<shortest))
 165                         shortest = child_iv;
 166         }
 167
 168         if(shortest!=anim_interval)
 169                 set_animation_interval(shortest);
 170 }
 171
 172 void Container::rebuild_hierarchy()
 173 {
 174         Widget::rebuild_hierarchy();
 175
 176         if(children_rebuild_needed)
 177         {
 178                 children_rebuild_needed = false;
 179                 for(const unique_ptr<Child> &c: children)
 180                         c->widget->rebuild_hierarchy();
 181         }
 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 = nullptr;
 210                         if(!pointer_focus)
 211                                 set_pointer_focus(find_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((child && child->get_geometry().is_inside(x, y)) ? child : nullptr);
 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 = find_child_at(x, y);
 243                 if(child && child->is_enabled())
 244                         return child;
 245                 else
 246                         return nullptr;
 247         }
 248 }
 249
 250 void Container::pointer_leave()
 251 {
 252         Widget::pointer_leave();
 253         set_pointer_focus(nullptr);
 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 = nullptr;
 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_in()
 316 {
 317         if(saved_input_focus)
 318                 set_input_focus(saved_input_focus);
 319         Widget::focus_in();
 320 }
 321
 322 void Container::focus_out()
 323 {
 324         saved_input_focus = input_focus;
 325         set_input_focus(nullptr);
 326         Widget::focus_out();
 327 }
 328
 329 bool Container::navigate(Navigation nav)
 330 {
 331         if(input_focus && input_focus->is_enabled())
 332                 return input_focus->navigate(nav);
 333         else
 334                 return false;
 335 }
 336
 337 void Container::animate(const Time::TimeDelta &dt)
 338 {
 339         for(const unique_ptr<Child> &c: children)
 340         {
 341                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 342                 if(!child_iv)
 343                         continue;
 344
 345                 c->time_since_animate += dt;
 346                 if(c->time_since_animate>=child_iv)
 347                 {
 348                         Time::TimeDelta child_dt = c->time_since_animate;
 349                         c->time_since_animate = min(c->time_since_animate-child_iv, child_iv);
 350                         c->widget->animate(child_dt);
 351                 }
 352         }
 353 }
 354
 355 void Container::on_reparent()
 356 {
 357         for(const unique_ptr<Child> &c: children)
 358         {
 359                 if(Container *o = dynamic_cast<Container *>(c->widget))
 360                         o->on_reparent();
 361                 c->widget->update_style();
 362         }
 363 }
 364
 365 void Container::on_input_focus_changed(Widget *wdg)
 366 {
 367         if(wdg)
 368                 raise(*wdg);
 369 }
 370
 371
 372 Container::Child::Child(Container &c, Widget *w):
 373         container(c),
 374         widget(w)
 375 {
 376         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 377         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 378         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 379         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 380         widget->signal_request_animation.connect(sigc::mem_fun(this, &Child::request_animation));
 381         widget->signal_rebuild_needed.connect(sigc::mem_fun(this, &Child::rebuild_needed));
 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 = nullptr;
 395                 if(widget==container.pointer_focus)
 396                         container.set_pointer_focus(nullptr);
 397                 if(widget==container.input_focus)
 398                         container.set_input_focus(nullptr);
 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, true);
 415                 container.signal_grab_pointer.emit();
 416         }
 417 }
 418
 419 void Container::Child::ungrab_pointer()
 420 {
 421         if(container.pointer_grabbed && container.pointer_focus==widget)
 422         {
 423                 // XXX Should set to the widget under pointer
 424                 container.set_pointer_focus(nullptr);
 425                 container.signal_ungrab_pointer.emit();
 426         }
 427 }
 428
 429 void Container::Child::request_animation(const Time::TimeDelta &interval)
 430 {
 431         if(!interval)
 432                 time_since_animate = Time::zero;
 433         container.check_animation_interval();
 434 }
 435
 436 void Container::Child::rebuild_needed()
 437 {
 438         container.children_rebuild_needed = true;
 439         container.signal_rebuild_needed.emit();
 440 }
 441
 442 } // namespace GLtk
 443 } // namespace Msp