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         wdg.set_parent(nullptr);
  39         delete *i;
  40         children.erase(i);
  41         if(wdg.get_animation_interval())
  42                 check_animation_interval();
  43         on_child_removed(wdg);
  44 }
  45
  46 Container::Child *Container::create_child(Widget *wdg)
  47 {
  48         return new Child(*this, wdg);
  49 }
  50
  51 Geometry Container::determine_child_geometry(const Widget &child, const Part &part) const
  52 {
  53         Geometry pgeom = part.get_geometry();
  54         if(!pgeom.w || !pgeom.h)
  55         {
  56                 Geometry cgeom;
  57                 child.autosize(cgeom);
  58                 if(!pgeom.w)
  59                         pgeom.w = cgeom.w;
  60                 if(!pgeom.h)
  61                         pgeom.h = cgeom.h;
  62         }
  63
  64         part.get_alignment().apply(pgeom, geom, part.get_margin());
  65         return pgeom;
  66 }
  67
  68 void Container::autosize_child(const Widget &child, const Part &part, Geometry &ageom) const
  69 {
  70         Geometry cgeom = determine_child_geometry(child, part);
  71         const Sides &margin = part.get_margin();
  72         ageom.w = max(ageom.w, cgeom.w+margin.left+margin.right);
  73         ageom.h = max(ageom.h, cgeom.h+margin.top+margin.bottom);
  74 }
  75
  76 void Container::reposition_child(Widget &child, const Part &part) const
  77 {
  78         child.set_geometry(determine_child_geometry(child, part));
  79 }
  80
  81 list<Widget *> Container::get_children() const
  82 {
  83         list<Widget *> result;
  84         for(const Child *c: children)
  85                 result.push_back(c->widget);
  86         return result;
  87 }
  88
  89 Widget *Container::get_child_at(int x, int y) const
  90 {
  91         for(auto i=children.end(); i!=children.begin();)
  92                 if((*--i)->widget->is_visible() && (*i)->widget->get_geometry().is_inside(x, y))
  93                         return (*i)->widget;
  94
  95         return nullptr;
  96 }
  97
  98 Widget *Container::get_descendant_at(int x, int y) const
  99 {
 100         Widget *wdg = get_child_at(x, y);
 101         if(Container *cont = dynamic_cast<Container *>(wdg))
 102         {
 103                 const Geometry &cgeom = wdg->get_geometry();
 104                 Widget *wdg2 = cont->get_descendant_at(x-cgeom.x, y-cgeom.y);
 105                 if(wdg2)
 106                         return wdg2;
 107         }
 108         return wdg;
 109 }
 110
 111 void Container::raise(Widget &wdg)
 112 {
 113         auto i = find_if(children, [&wdg](const Child *c){ return c->widget==&wdg; });
 114         if(i==children.end())
 115                 throw hierarchy_error("widget not in container");
 116
 117         children.splice(children.end(), children, i);
 118 }
 119
 120 void Container::set_pointer_focus(Widget *wdg, bool grab)
 121 {
 122         if(wdg!=pointer_focus)
 123         {
 124                 if(pointer_focus)
 125                         pointer_focus->pointer_leave();
 126
 127                 pointer_focus = wdg;
 128                 pointer_grabbed = grab;
 129
 130                 if(pointer_focus)
 131                         pointer_focus->pointer_enter();
 132         }
 133         else
 134                 pointer_grabbed = grab;
 135 }
 136
 137 void Container::set_input_focus(Widget *wdg)
 138 {
 139         if(wdg!=input_focus)
 140         {
 141                 if(input_focus)
 142                         input_focus->focus_out();
 143
 144                 input_focus = wdg;
 145                 on_input_focus_changed(input_focus);
 146
 147                 if(input_focus)
 148                         input_focus->focus_in();
 149         }
 150 }
 151
 152 Widget *Container::get_final_input_focus() const
 153 {
 154         if(Container *container = dynamic_cast<Container *>(input_focus))
 155                 if(Widget *focus = container->get_final_input_focus())
 156                         return focus;
 157
 158         return input_focus;
 159 }
 160
 161 void Container::check_animation_interval()
 162 {
 163         Time::TimeDelta shortest;
 164         for(const Child *c: children)
 165         {
 166                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 167                 if(child_iv && (!shortest || child_iv<shortest))
 168                         shortest = child_iv;
 169         }
 170
 171         if(shortest!=anim_interval)
 172                 set_animation_interval(shortest);
 173 }
 174
 175 void Container::rebuild_hierarchy()
 176 {
 177         Widget::rebuild_hierarchy();
 178
 179         if(children_rebuild_needed)
 180         {
 181                 children_rebuild_needed = false;
 182                 for(Child *c: children)
 183                         c->widget->rebuild_hierarchy();
 184         }
 185 }
 186
 187 void Container::button_press(int x, int y, unsigned btn)
 188 {
 189         if(Widget *child = get_pointer_target(x, y, false))
 190         {
 191                 if(!click_focus)
 192                 {
 193                         set_pointer_focus(child);
 194                         if(child->is_focusable())
 195                                 set_input_focus(child);
 196
 197                         click_focus = child;
 198                         click_button = btn;
 199                 }
 200
 201                 const Geometry &cgeom = child->get_geometry();
 202                 child->button_press(x-cgeom.x, y-cgeom.y, btn);
 203         }
 204 }
 205
 206 void Container::button_release(int x, int y, unsigned btn)
 207 {
 208         if(Widget *child = get_pointer_target(x, y, false))
 209         {
 210                 if(child==click_focus && btn==click_button)
 211                 {
 212                         click_focus = nullptr;
 213                         if(!pointer_focus)
 214                                 set_pointer_focus(get_child_at(x, y));
 215                 }
 216
 217                 const Geometry &cgeom = child->get_geometry();
 218                 child->button_release(x-cgeom.x, y-cgeom.y, btn);
 219         }
 220 }
 221
 222 void Container::pointer_motion(int x, int y)
 223 {
 224         Widget *child = get_pointer_target(x, y, false);
 225         if(!pointer_grabbed)
 226                 set_pointer_focus((child && child->get_geometry().is_inside(x, y)) ? child : nullptr);
 227
 228         if(child)
 229         {
 230                 const Geometry &cgeom = child->get_geometry();
 231                 child->pointer_motion(x-cgeom.x, y-cgeom.y);
 232         }
 233 }
 234
 235 Widget *Container::get_pointer_target(int x, int y, bool touch) const
 236 {
 237         if(pointer_grabbed)
 238                 return pointer_focus;
 239         else if(!touch && click_focus)
 240                 return click_focus;
 241         else if(touch && touch_focus)
 242                 return touch_focus;
 243         else
 244         {
 245                 Widget *child = get_child_at(x, y);
 246                 if(child && child->is_enabled())
 247                         return child;
 248                 else
 249                         return nullptr;
 250         }
 251 }
 252
 253 void Container::pointer_leave()
 254 {
 255         Widget::pointer_leave();
 256         set_pointer_focus(nullptr);
 257 }
 258
 259 void Container::touch_press(int x, int y, unsigned finger)
 260 {
 261         if(Widget *child = get_pointer_target(x, y, true))
 262         {
 263                 // TODO track focus for each finger separately
 264                 if(!touch_focus)
 265                         touch_focus = child;
 266
 267                 const Geometry &cgeom = child->get_geometry();
 268                 child->touch_press(x-cgeom.x, y-cgeom.y, finger);
 269         }
 270 }
 271
 272 void Container::touch_release(int x, int y, unsigned finger)
 273 {
 274         if(Widget *child = get_pointer_target(x, y, true))
 275         {
 276                 // TODO track focus for each finger separately
 277                 if(child==touch_focus)
 278                         touch_focus = nullptr;
 279
 280                 const Geometry &cgeom = child->get_geometry();
 281                 child->touch_release(x-cgeom.x, y-cgeom.y, finger);
 282         }
 283 }
 284
 285 void Container::touch_motion(int x, int y, unsigned finger)
 286 {
 287         if(Widget *child = get_pointer_target(x, y, true))
 288         {
 289                 const Geometry &cgeom = child->get_geometry();
 290                 child->touch_motion(x-cgeom.x, y-cgeom.y, finger);
 291         }
 292 }
 293
 294 bool Container::key_press(unsigned key, unsigned mod)
 295 {
 296         if(input_focus && input_focus->is_enabled())
 297                 return input_focus->key_press(key, mod);
 298         else
 299                 return false;
 300 }
 301
 302 bool Container::key_release(unsigned key, unsigned mod)
 303 {
 304         if(input_focus && input_focus->is_enabled())
 305                 return input_focus->key_release(key, mod);
 306         else
 307                 return false;
 308 }
 309
 310 bool Container::character(wchar_t ch)
 311 {
 312         if(input_focus && input_focus->is_enabled())
 313                 return input_focus->character(ch);
 314         else
 315                 return false;
 316 }
 317
 318 void Container::focus_in()
 319 {
 320         if(saved_input_focus && saved_input_focus->get_parent()==this)
 321                 set_input_focus(saved_input_focus);
 322         Widget::focus_in();
 323 }
 324
 325 void Container::focus_out()
 326 {
 327         saved_input_focus = input_focus;
 328         set_input_focus(nullptr);
 329         Widget::focus_out();
 330 }
 331
 332 bool Container::navigate(Navigation nav)
 333 {
 334         if(input_focus && input_focus->is_enabled())
 335                 return input_focus->navigate(nav);
 336         else
 337                 return false;
 338 }
 339
 340 void Container::animate(const Time::TimeDelta &dt)
 341 {
 342         for(Child *c: children)
 343         {
 344                 const Time::TimeDelta &child_iv = c->widget->get_animation_interval();
 345                 if(!child_iv)
 346                         continue;
 347
 348                 c->time_since_animate += dt;
 349                 if(c->time_since_animate>=child_iv)
 350                 {
 351                         Time::TimeDelta child_dt = c->time_since_animate;
 352                         c->time_since_animate = min(c->time_since_animate-child_iv, child_iv);
 353                         c->widget->animate(child_dt);
 354                 }
 355         }
 356 }
 357
 358 void Container::on_reparent()
 359 {
 360         for(const Child *c: children)
 361         {
 362                 if(Container *o = dynamic_cast<Container *>(c->widget))
 363                         o->on_reparent();
 364                 c->widget->update_style();
 365         }
 366 }
 367
 368 void Container::on_input_focus_changed(Widget *wdg)
 369 {
 370         if(wdg)
 371                 raise(*wdg);
 372 }
 373
 374
 375 Container::Child::Child(Container &c, Widget *w):
 376         container(c),
 377         widget(w)
 378 {
 379         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 380         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 381         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 382         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 383         widget->signal_request_animation.connect(sigc::mem_fun(this, &Child::request_animation));
 384         widget->signal_rebuild_needed.connect(sigc::mem_fun(this, &Child::rebuild_needed));
 385 }
 386
 387 Container::Child::~Child()
 388 {
 389         visibility_changed(false);
 390 }
 391
 392 void Container::Child::visibility_changed(bool v)
 393 {
 394         if(!v)
 395         {
 396                 if(widget==container.click_focus)
 397                         container.click_focus = nullptr;
 398                 if(widget==container.pointer_focus)
 399                         container.set_pointer_focus(nullptr);
 400                 if(widget==container.input_focus)
 401                         container.set_input_focus(nullptr);
 402         }
 403 }
 404
 405 void Container::Child::request_focus()
 406 {
 407         if(container.parent && container.visible)
 408                 container.set_focus();
 409         if(container.state&FOCUS)
 410                 container.set_input_focus(widget);
 411 }
 412
 413 void Container::Child::grab_pointer()
 414 {
 415         if(!container.pointer_grabbed)
 416         {
 417                 container.set_pointer_focus(widget, true);
 418                 container.signal_grab_pointer.emit();
 419         }
 420 }
 421
 422 void Container::Child::ungrab_pointer()
 423 {
 424         if(container.pointer_grabbed && container.pointer_focus==widget)
 425         {
 426                 // XXX Should set to the widget under pointer
 427                 container.set_pointer_focus(nullptr);
 428                 container.signal_ungrab_pointer.emit();
 429         }
 430 }
 431
 432 void Container::Child::request_animation(const Time::TimeDelta &interval)
 433 {
 434         if(!interval)
 435                 time_since_animate = Time::zero;
 436         container.check_animation_interval();
 437 }
 438
 439 void Container::Child::rebuild_needed()
 440 {
 441         container.children_rebuild_needed = true;
 442         container.signal_rebuild_needed.emit();
 443 }
 444
 445 } // namespace GLtk
 446 } // namespace Msp