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