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         click_focus(0),
  17         click_button(0),
  18         pointer_focus(0),
  19         pointer_grabbed(false),
  20         input_focus(0),
  21         saved_input_focus(0),
  22         touch_focus(0),
  23         children_rebuild_needed(false)
  24 { }
  25
  26 Container::~Container()
  27 {
  28         while(!children.empty())
  29                 delete children.front()->widget;
  30 }
  31
  32 void Container::add(Widget &wdg)
  33 {
  34         wdg.set_parent(this);
  35         children.push_back(create_child(&wdg));
  36         if(wdg.get_animation_interval())
  37                 check_animation_interval();
  38         children_rebuild_needed = true;
  39         signal_rebuild_needed.emit();
  40         on_child_added(wdg);
  41 }
  42
  43 void Container::remove(Widget &wdg)
  44 {
  45         auto i = find_if(children, [&wdg](const Child *c){ return c->widget==&wdg; });
  46         if(i==children.end())
  47                 throw hierarchy_error("widget not in container");
  48
  49         wdg.set_parent(0);
  50         delete *i;
  51         children.erase(i);
  52         if(wdg.get_animation_interval())
  53                 check_animation_interval();
  54         on_child_removed(wdg);
  55 }
  56
  57 Container::Child *Container::create_child(Widget *wdg)
  58 {
  59         return new Child(*this, wdg);
  60 }
  61
  62 Geometry Container::determine_child_geometry(const Widget &child, const Part &part) const
  63 {
  64         Geometry pgeom = part.get_geometry();
  65         if(!pgeom.w || !pgeom.h)
  66         {
  67                 Geometry cgeom;
  68                 child.autosize(cgeom);
  69                 if(!pgeom.w)
  70                         pgeom.w = cgeom.w;
  71                 if(!pgeom.h)
  72                         pgeom.h = cgeom.h;
  73         }
  74
  75         part.get_alignment().apply(pgeom, geom, part.get_margin());
  76         return pgeom;
  77 }
  78
  79 void Container::autosize_child(const Widget &child, const Part &part, Geometry &ageom) const
  80 {
  81         Geometry cgeom = determine_child_geometry(child, part);
  82         const Sides &margin = part.get_margin();
  83         ageom.w = max(ageom.w, cgeom.w+margin.left+margin.right);
  84         ageom.h = max(ageom.h, cgeom.h+margin.top+margin.bottom);
  85 }
  86
  87 void Container::reposition_child(Widget &child, const Part &part) const
  88 {
  89         child.set_geometry(determine_child_geometry(child, part));
  90 }
  91
  92 list<Widget *> Container::get_children() const
  93 {
  94         list<Widget *> result;
  95         for(const Child *c: children)
  96                 result.push_back(c->widget);
  97         return result;
  98 }
  99
 100 Widget *Container::get_child_at(int x, int y) const
 101 {
 102         for(auto i=children.end(); i!=children.begin();)
 103                 if((*--i)->widget->is_visible() && (*i)->widget->get_geometry().is_inside(x, y))
 104                         return (*i)->widget;
 105
 106         return 0;
 107 }
 108
 109 Widget *Container::get_descendant_at(int x, int y) const
 110 {
 111         Widget *wdg = get_child_at(x, y);
 112         if(Container *cont = dynamic_cast<Container *>(wdg))
 113         {
 114                 const Geometry &cgeom = wdg->get_geometry();
 115                 Widget *wdg2 = cont->get_descendant_at(x-cgeom.x, y-cgeom.y);
 116                 if(wdg2)
 117                         return wdg2;
 118         }
 119         return wdg;
 120 }
 121
 122 void Container::raise(Widget &wdg)
 123 {
 124         auto i = find_if(children, [&wdg](const Child *c){ return c->widget==&wdg; });
 125         if(i==children.end())
 126                 throw hierarchy_error("widget not in container");
 127
 128         children.splice(children.end(), children, i);
 129 }
 130
 131 void Container::set_pointer_focus(Widget *wdg, bool grab)
 132 {
 133         if(wdg!=pointer_focus)
 134         {
 135                 if(pointer_focus)
 136                         pointer_focus->pointer_leave();
 137
 138                 pointer_focus = wdg;
 139                 pointer_grabbed = grab;
 140
 141                 if(pointer_focus)
 142                         pointer_focus->pointer_enter();
 143         }
 144         else
 145                 pointer_grabbed = grab;
 146 }
 147
 148 void Container::set_input_focus(Widget *wdg)
 149 {
 150         if(wdg!=input_focus)
 151         {
 152                 if(input_focus)
 153                         input_focus->focus_out();
 154
 155                 input_focus = wdg;
 156                 on_input_focus_changed(input_focus);
 157
 158                 if(input_focus)
 159                         input_focus->focus_in();
 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(const Child *c: children)
 176         {
 177                 const Time::TimeDelta &child_iv = c->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::rebuild_hierarchy()
 187 {
 188         Widget::rebuild_hierarchy();
 189
 190         if(children_rebuild_needed)
 191         {
 192                 children_rebuild_needed = false;
 193                 for(Child *c: children)
 194                         c->widget->rebuild_hierarchy();
 195         }
 196 }
 197
 198 void Container::button_press(int x, int y, unsigned btn)
 199 {
 200         if(Widget *child = get_pointer_target(x, y, false))
 201         {
 202                 if(!click_focus)
 203                 {
 204                         set_pointer_focus(child);
 205                         if(child->is_focusable())
 206                                 set_input_focus(child);
 207
 208                         click_focus = child;
 209                         click_button = btn;
 210                 }
 211
 212                 const Geometry &cgeom = child->get_geometry();
 213                 child->button_press(x-cgeom.x, y-cgeom.y, btn);
 214         }
 215 }
 216
 217 void Container::button_release(int x, int y, unsigned btn)
 218 {
 219         if(Widget *child = get_pointer_target(x, y, false))
 220         {
 221                 if(child==click_focus && btn==click_button)
 222                 {
 223                         click_focus = 0;
 224                         if(!pointer_focus)
 225                                 set_pointer_focus(get_child_at(x, y));
 226                 }
 227
 228                 const Geometry &cgeom = child->get_geometry();
 229                 child->button_release(x-cgeom.x, y-cgeom.y, btn);
 230         }
 231 }
 232
 233 void Container::pointer_motion(int x, int y)
 234 {
 235         Widget *child = get_pointer_target(x, y, false);
 236         if(!pointer_grabbed)
 237                 set_pointer_focus((child && child->get_geometry().is_inside(x, y)) ? child : 0);
 238
 239         if(child)
 240         {
 241                 const Geometry &cgeom = child->get_geometry();
 242                 child->pointer_motion(x-cgeom.x, y-cgeom.y);
 243         }
 244 }
 245
 246 Widget *Container::get_pointer_target(int x, int y, bool touch) const
 247 {
 248         if(pointer_grabbed)
 249                 return pointer_focus;
 250         else if(!touch && click_focus)
 251                 return click_focus;
 252         else if(touch && touch_focus)
 253                 return touch_focus;
 254         else
 255         {
 256                 Widget *child = get_child_at(x, y);
 257                 if(child && child->is_enabled())
 258                         return child;
 259                 else
 260                         return 0;
 261         }
 262 }
 263
 264 void Container::pointer_leave()
 265 {
 266         Widget::pointer_leave();
 267         set_pointer_focus(0);
 268 }
 269
 270 void Container::touch_press(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(!touch_focus)
 276                         touch_focus = child;
 277
 278                 const Geometry &cgeom = child->get_geometry();
 279                 child->touch_press(x-cgeom.x, y-cgeom.y, finger);
 280         }
 281 }
 282
 283 void Container::touch_release(int x, int y, unsigned finger)
 284 {
 285         if(Widget *child = get_pointer_target(x, y, true))
 286         {
 287                 // TODO track focus for each finger separately
 288                 if(child==touch_focus)
 289                         touch_focus = 0;
 290
 291                 const Geometry &cgeom = child->get_geometry();
 292                 child->touch_release(x-cgeom.x, y-cgeom.y, finger);
 293         }
 294 }
 295
 296 void Container::touch_motion(int x, int y, unsigned finger)
 297 {
 298         if(Widget *child = get_pointer_target(x, y, true))
 299         {
 300                 const Geometry &cgeom = child->get_geometry();
 301                 child->touch_motion(x-cgeom.x, y-cgeom.y, finger);
 302         }
 303 }
 304
 305 bool Container::key_press(unsigned key, unsigned mod)
 306 {
 307         if(input_focus && input_focus->is_enabled())
 308                 return input_focus->key_press(key, mod);
 309         else
 310                 return false;
 311 }
 312
 313 bool Container::key_release(unsigned key, unsigned mod)
 314 {
 315         if(input_focus && input_focus->is_enabled())
 316                 return input_focus->key_release(key, mod);
 317         else
 318                 return false;
 319 }
 320
 321 bool Container::character(wchar_t ch)
 322 {
 323         if(input_focus && input_focus->is_enabled())
 324                 return input_focus->character(ch);
 325         else
 326                 return false;
 327 }
 328
 329 void Container::focus_in()
 330 {
 331         if(saved_input_focus && saved_input_focus->get_parent()==this)
 332                 set_input_focus(saved_input_focus);
 333         Widget::focus_in();
 334 }
 335
 336 void Container::focus_out()
 337 {
 338         saved_input_focus = input_focus;
 339         set_input_focus(0);
 340         Widget::focus_out();
 341 }
 342
 343 bool Container::navigate(Navigation nav)
 344 {
 345         if(input_focus && input_focus->is_enabled())
 346                 return input_focus->navigate(nav);
 347         else
 348                 return false;
 349 }
 350
 351 void Container::animate(const Time::TimeDelta &dt)
 352 {
 353         for(Child *c: children)
 354         {
 355                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 356                 if(!child_iv)
 357                         continue;
 358
 359                 c->time_since_animate += dt;
 360                 if(c->time_since_animate>=child_iv)
 361                 {
 362                         Time::TimeDelta child_dt = c->time_since_animate;
 363                         c->time_since_animate = min(c->time_since_animate-child_iv, child_iv);
 364                         c->widget->animate(child_dt);
 365                 }
 366         }
 367 }
 368
 369 void Container::on_reparent()
 370 {
 371         for(const Child *c: children)
 372         {
 373                 if(Container *o = dynamic_cast<Container *>(c->widget))
 374                         o->on_reparent();
 375                 c->widget->update_style();
 376         }
 377 }
 378
 379 void Container::on_input_focus_changed(Widget *wdg)
 380 {
 381         if(wdg)
 382                 raise(*wdg);
 383 }
 384
 385
 386 Container::Child::Child(Container &c, Widget *w):
 387         container(c),
 388         widget(w)
 389 {
 390         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 391         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 392         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 393         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 394         widget->signal_request_animation.connect(sigc::mem_fun(this, &Child::request_animation));
 395         widget->signal_rebuild_needed.connect(sigc::mem_fun(this, &Child::rebuild_needed));
 396 }
 397
 398 Container::Child::~Child()
 399 {
 400         visibility_changed(false);
 401 }
 402
 403 void Container::Child::visibility_changed(bool v)
 404 {
 405         if(!v)
 406         {
 407                 if(widget==container.click_focus)
 408                         container.click_focus = 0;
 409                 if(widget==container.pointer_focus)
 410                         container.set_pointer_focus(0);
 411                 if(widget==container.input_focus)
 412                         container.set_input_focus(0);
 413         }
 414 }
 415
 416 void Container::Child::request_focus()
 417 {
 418         if(container.parent && container.visible)
 419                 container.set_focus();
 420         if(container.state&FOCUS)
 421                 container.set_input_focus(widget);
 422 }
 423
 424 void Container::Child::grab_pointer()
 425 {
 426         if(!container.pointer_grabbed)
 427         {
 428                 container.set_pointer_focus(widget, true);
 429                 container.signal_grab_pointer.emit();
 430         }
 431 }
 432
 433 void Container::Child::ungrab_pointer()
 434 {
 435         if(container.pointer_grabbed && container.pointer_focus==widget)
 436         {
 437                 // XXX Should set to the widget under pointer
 438                 container.set_pointer_focus(0);
 439                 container.signal_ungrab_pointer.emit();
 440         }
 441 }
 442
 443 void Container::Child::request_animation(const Time::TimeDelta &interval)
 444 {
 445         if(!interval)
 446                 time_since_animate = Time::zero;
 447         container.check_animation_interval();
 448 }
 449
 450 void Container::Child::rebuild_needed()
 451 {
 452         container.children_rebuild_needed = true;
 453         container.signal_rebuild_needed.emit();
 454 }
 455
 456 } // namespace GLtk
 457 } // namespace Msp