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 vector<Widget *> Container::get_children() const
  84 {
  85         vector<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                 if(Widget *wdg2 = cont->find_descendant_at(x-cgeom.x, y-cgeom.y))
 107                         return wdg2;
 108         }
 109         return wdg;
 110 }
 111
 112 void Container::raise(Widget &wdg)
 113 {
 114         auto i = find_if(children, [&wdg](const Child *c){ return c->widget==&wdg; });
 115         if(i==children.end())
 116                 throw hierarchy_error("widget not in container");
 117
 118         Child *c = *i;
 119         children.erase(i);
 120         children.push_back(c);
 121 }
 122
 123 void Container::set_pointer_focus(Widget *wdg, bool grab)
 124 {
 125         if(wdg!=pointer_focus)
 126         {
 127                 if(pointer_focus)
 128                         pointer_focus->pointer_leave();
 129
 130                 pointer_focus = wdg;
 131                 pointer_grabbed = grab;
 132
 133                 if(pointer_focus)
 134                         pointer_focus->pointer_enter();
 135         }
 136         else
 137                 pointer_grabbed = grab;
 138 }
 139
 140 void Container::set_input_focus(Widget *wdg)
 141 {
 142         if(wdg!=input_focus)
 143         {
 144                 if(input_focus)
 145                         input_focus->focus_out();
 146
 147                 input_focus = wdg;
 148                 on_input_focus_changed(input_focus);
 149
 150                 if(input_focus)
 151                         input_focus->focus_in();
 152         }
 153 }
 154
 155 Widget *Container::get_final_input_focus() const
 156 {
 157         if(Container *container = dynamic_cast<Container *>(input_focus))
 158                 if(Widget *focus = container->get_final_input_focus())
 159                         return focus;
 160
 161         return input_focus;
 162 }
 163
 164 void Container::check_animation_interval()
 165 {
 166         Time::TimeDelta shortest;
 167         for(const Child *c: children)
 168         {
 169                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 170                 if(child_iv && (!shortest || child_iv<shortest))
 171                         shortest = child_iv;
 172         }
 173
 174         if(shortest!=anim_interval)
 175                 set_animation_interval(shortest);
 176 }
 177
 178 void Container::rebuild_hierarchy()
 179 {
 180         Widget::rebuild_hierarchy();
 181
 182         if(children_rebuild_needed)
 183         {
 184                 children_rebuild_needed = false;
 185                 for(Child *c: children)
 186                         c->widget->rebuild_hierarchy();
 187         }
 188 }
 189
 190 void Container::button_press(int x, int y, unsigned btn)
 191 {
 192         if(Widget *child = get_pointer_target(x, y, false))
 193         {
 194                 if(!click_focus)
 195                 {
 196                         set_pointer_focus(child);
 197                         if(child->is_focusable())
 198                                 set_input_focus(child);
 199
 200                         click_focus = child;
 201                         click_button = btn;
 202                 }
 203
 204                 const Geometry &cgeom = child->get_geometry();
 205                 child->button_press(x-cgeom.x, y-cgeom.y, btn);
 206         }
 207 }
 208
 209 void Container::button_release(int x, int y, unsigned btn)
 210 {
 211         if(Widget *child = get_pointer_target(x, y, false))
 212         {
 213                 if(child==click_focus && btn==click_button)
 214                 {
 215                         click_focus = nullptr;
 216                         if(!pointer_focus)
 217                                 set_pointer_focus(find_child_at(x, y));
 218                 }
 219
 220                 const Geometry &cgeom = child->get_geometry();
 221                 child->button_release(x-cgeom.x, y-cgeom.y, btn);
 222         }
 223 }
 224
 225 void Container::pointer_motion(int x, int y)
 226 {
 227         Widget *child = get_pointer_target(x, y, false);
 228         if(!pointer_grabbed)
 229                 set_pointer_focus((child && child->get_geometry().is_inside(x, y)) ? child : nullptr);
 230
 231         if(child)
 232         {
 233                 const Geometry &cgeom = child->get_geometry();
 234                 child->pointer_motion(x-cgeom.x, y-cgeom.y);
 235         }
 236 }
 237
 238 Widget *Container::get_pointer_target(int x, int y, bool touch) const
 239 {
 240         if(pointer_grabbed)
 241                 return pointer_focus;
 242         else if(!touch && click_focus)
 243                 return click_focus;
 244         else if(touch && touch_focus)
 245                 return touch_focus;
 246         else
 247         {
 248                 Widget *child = find_child_at(x, y);
 249                 if(child && child->is_enabled())
 250                         return child;
 251                 else
 252                         return nullptr;
 253         }
 254 }
 255
 256 void Container::pointer_leave()
 257 {
 258         Widget::pointer_leave();
 259         set_pointer_focus(nullptr);
 260 }
 261
 262 void Container::touch_press(int x, int y, unsigned finger)
 263 {
 264         if(Widget *child = get_pointer_target(x, y, true))
 265         {
 266                 // TODO track focus for each finger separately
 267                 if(!touch_focus)
 268                         touch_focus = child;
 269
 270                 const Geometry &cgeom = child->get_geometry();
 271                 child->touch_press(x-cgeom.x, y-cgeom.y, finger);
 272         }
 273 }
 274
 275 void Container::touch_release(int x, int y, unsigned finger)
 276 {
 277         if(Widget *child = get_pointer_target(x, y, true))
 278         {
 279                 // TODO track focus for each finger separately
 280                 if(child==touch_focus)
 281                         touch_focus = nullptr;
 282
 283                 const Geometry &cgeom = child->get_geometry();
 284                 child->touch_release(x-cgeom.x, y-cgeom.y, finger);
 285         }
 286 }
 287
 288 void Container::touch_motion(int x, int y, unsigned finger)
 289 {
 290         if(Widget *child = get_pointer_target(x, y, true))
 291         {
 292                 const Geometry &cgeom = child->get_geometry();
 293                 child->touch_motion(x-cgeom.x, y-cgeom.y, finger);
 294         }
 295 }
 296
 297 bool Container::key_press(unsigned key, unsigned mod)
 298 {
 299         if(input_focus && input_focus->is_enabled())
 300                 return input_focus->key_press(key, mod);
 301         else
 302                 return false;
 303 }
 304
 305 bool Container::key_release(unsigned key, unsigned mod)
 306 {
 307         if(input_focus && input_focus->is_enabled())
 308                 return input_focus->key_release(key, mod);
 309         else
 310                 return false;
 311 }
 312
 313 bool Container::character(wchar_t ch)
 314 {
 315         if(input_focus && input_focus->is_enabled())
 316                 return input_focus->character(ch);
 317         else
 318                 return false;
 319 }
 320
 321 void Container::focus_in()
 322 {
 323         if(saved_input_focus)
 324                 set_input_focus(saved_input_focus);
 325         Widget::focus_in();
 326 }
 327
 328 void Container::focus_out()
 329 {
 330         saved_input_focus = input_focus;
 331         set_input_focus(nullptr);
 332         Widget::focus_out();
 333 }
 334
 335 bool Container::navigate(Navigation nav)
 336 {
 337         if(input_focus && input_focus->is_enabled())
 338                 return input_focus->navigate(nav);
 339         else
 340                 return false;
 341 }
 342
 343 void Container::animate(const Time::TimeDelta &dt)
 344 {
 345         for(Child *c: children)
 346         {
 347                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 348                 if(!child_iv)
 349                         continue;
 350
 351                 c->time_since_animate += dt;
 352                 if(c->time_since_animate>=child_iv)
 353                 {
 354                         Time::TimeDelta child_dt = c->time_since_animate;
 355                         c->time_since_animate = min(c->time_since_animate-child_iv, child_iv);
 356                         c->widget->animate(child_dt);
 357                 }
 358         }
 359 }
 360
 361 void Container::on_reparent()
 362 {
 363         for(const Child *c: children)
 364         {
 365                 if(Container *o = dynamic_cast<Container *>(c->widget))
 366                         o->on_reparent();
 367                 c->widget->update_style();
 368         }
 369 }
 370
 371 void Container::on_input_focus_changed(Widget *wdg)
 372 {
 373         if(wdg)
 374                 raise(*wdg);
 375 }
 376
 377
 378 Container::Child::Child(Container &c, Widget *w):
 379         container(c),
 380         widget(w)
 381 {
 382         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 383         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 384         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 385         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 386         widget->signal_request_animation.connect(sigc::mem_fun(this, &Child::request_animation));
 387         widget->signal_rebuild_needed.connect(sigc::mem_fun(this, &Child::rebuild_needed));
 388 }
 389
 390 Container::Child::~Child()
 391 {
 392         visibility_changed(false);
 393 }
 394
 395 void Container::Child::visibility_changed(bool v)
 396 {
 397         if(!v)
 398         {
 399                 if(widget==container.click_focus)
 400                         container.click_focus = nullptr;
 401                 if(widget==container.pointer_focus)
 402                         container.set_pointer_focus(nullptr);
 403                 if(widget==container.input_focus)
 404                         container.set_input_focus(nullptr);
 405         }
 406 }
 407
 408 void Container::Child::request_focus()
 409 {
 410         if(container.parent && container.visible)
 411                 container.set_focus();
 412         if(container.state&FOCUS)
 413                 container.set_input_focus(widget);
 414 }
 415
 416 void Container::Child::grab_pointer()
 417 {
 418         if(!container.pointer_grabbed)
 419         {
 420                 container.set_pointer_focus(widget, true);
 421                 container.signal_grab_pointer.emit();
 422         }
 423 }
 424
 425 void Container::Child::ungrab_pointer()
 426 {
 427         if(container.pointer_grabbed && container.pointer_focus==widget)
 428         {
 429                 // XXX Should set to the widget under pointer
 430                 container.set_pointer_focus(nullptr);
 431                 container.signal_ungrab_pointer.emit();
 432         }
 433 }
 434
 435 void Container::Child::request_animation(const Time::TimeDelta &interval)
 436 {
 437         if(!interval)
 438                 time_since_animate = Time::zero;
 439         container.check_animation_interval();
 440 }
 441
 442 void Container::Child::rebuild_needed()
 443 {
 444         container.children_rebuild_needed = true;
 445         container.signal_rebuild_needed.emit();
 446 }
 447
 448 } // namespace GLtk
 449 } // namespace Msp