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