source/container.cpp

   1 #include "container.h"
   2 #include "part.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GLtk {
   8
   9 hierarchy_error::hierarchy_error(const string &w):
  10         logic_error(w)
  11 { }
  12
  13
  14 Container::Container():
  15         click_focus(0),
  16         click_button(0),
  17         pointer_focus(0),
  18         pointer_grabbed(false),
  19         input_focus(0),
  20         touch_focus(0)
  21 { }
  22
  23 Container::~Container()
  24 {
  25         while(!children.empty())
  26                 delete children.front()->widget;
  27 }
  28
  29 void Container::add(Widget &wdg)
  30 {
  31         wdg.set_parent(this);
  32         children.push_back(create_child(&wdg));
  33         on_child_added(wdg);
  34 }
  35
  36 void Container::remove(Widget &wdg)
  37 {
  38         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
  39                 if((*i)->widget==&wdg)
  40                 {
  41                         wdg.set_parent(0);
  42                         delete *i;
  43                         children.erase(i);
  44                         on_child_removed(wdg);
  45                         return;
  46                 }
  47
  48         throw hierarchy_error("widget not in container");
  49 }
  50
  51 Container::Child *Container::create_child(Widget *wdg)
  52 {
  53         return new Child(*this, wdg);
  54 }
  55
  56 Geometry Container::determine_child_geometry(const Widget &child, const Part &part) const
  57 {
  58         Geometry pgeom = part.get_geometry();
  59         if(!pgeom.w || !pgeom.h)
  60         {
  61                 Geometry cgeom;
  62                 child.autosize(cgeom);
  63                 if(!pgeom.w)
  64                         pgeom.w = cgeom.w;
  65                 if(!pgeom.h)
  66                         pgeom.h = cgeom.h;
  67         }
  68
  69         part.get_alignment().apply(pgeom, geom, part.get_margin());
  70         return pgeom;
  71 }
  72
  73 void Container::autosize_child(const Widget &child, const Part &part, Geometry &ageom) const
  74 {
  75         Geometry cgeom = determine_child_geometry(child, part);
  76         const Sides &margin = part.get_margin();
  77         ageom.w = max(ageom.w, cgeom.w+margin.left+margin.right);
  78         ageom.h = max(ageom.h, cgeom.h+margin.top+margin.bottom);
  79 }
  80
  81 void Container::reposition_child(Widget &child, const Part &part) const
  82 {
  83         child.set_geometry(determine_child_geometry(child, part));
  84 }
  85
  86 list<Widget *> Container::get_children() const
  87 {
  88         list<Widget *> result;
  89         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
  90                 result.push_back((*i)->widget);
  91         return result;
  92 }
  93
  94 Widget *Container::get_child_at(int x, int y) const
  95 {
  96         for(list<Child *>::const_iterator i=children.end(); i!=children.begin();)
  97                 if((*--i)->widget->is_visible() && (*i)->widget->get_geometry().is_inside(x, y))
  98                         return (*i)->widget;
  99
 100         return 0;
 101 }
 102
 103 Widget *Container::get_descendant_at(int x, int y) const
 104 {
 105         Widget *wdg = get_child_at(x, y);
 106         if(Container *cont = dynamic_cast<Container *>(wdg))
 107         {
 108                 const Geometry &cgeom = wdg->get_geometry();
 109                 Widget *wdg2 = cont->get_descendant_at(x-cgeom.x, y-cgeom.y);
 110                 if(wdg2)
 111                         return wdg2;
 112         }
 113         return wdg;
 114 }
 115
 116 void Container::raise(Widget &wdg)
 117 {
 118         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 119                 if((*i)->widget==&wdg)
 120                 {
 121                         children.splice(children.end(), children, i);
 122                         return;
 123                 }
 124
 125         throw hierarchy_error("widget not in container");
 126 }
 127
 128 void Container::set_pointer_focus(Widget *wdg)
 129 {
 130         if(wdg!=pointer_focus)
 131         {
 132                 if(pointer_focus)
 133                         pointer_focus->pointer_leave();
 134
 135                 pointer_focus = wdg;
 136
 137                 if(pointer_focus)
 138                         pointer_focus->pointer_enter();
 139         }
 140 }
 141
 142 void Container::set_input_focus(Widget *wdg)
 143 {
 144         if(wdg!=input_focus)
 145         {
 146                 if(input_focus)
 147                         input_focus->focus_out();
 148
 149                 input_focus = wdg;
 150
 151                 if(input_focus)
 152                 {
 153                         raise(*wdg);
 154                         input_focus->focus_in();
 155                 }
 156         }
 157 }
 158
 159 Widget *Container::get_final_input_focus() const
 160 {
 161         if(Container *container = dynamic_cast<Container *>(input_focus))
 162                 if(Widget *focus = container->get_final_input_focus())
 163                         return focus;
 164
 165         return input_focus;
 166 }
 167
 168 void Container::button_press(int x, int y, unsigned btn)
 169 {
 170         if(Widget *child = get_pointer_target(x, y, false))
 171         {
 172                 if(!click_focus)
 173                 {
 174                         set_pointer_focus(child);
 175                         if(child->is_focusable())
 176                                 set_input_focus(child);
 177
 178                         click_focus = child;
 179                         click_button = btn;
 180                 }
 181
 182                 const Geometry &cgeom = child->get_geometry();
 183                 child->button_press(x-cgeom.x, y-cgeom.y, btn);
 184         }
 185 }
 186
 187 void Container::button_release(int x, int y, unsigned btn)
 188 {
 189         if(Widget *child = get_pointer_target(x, y, false))
 190         {
 191                 if(child==click_focus && btn==click_button)
 192                 {
 193                         click_focus = 0;
 194                         if(!pointer_focus)
 195                                 set_pointer_focus(get_child_at(x, y));
 196                 }
 197
 198                 const Geometry &cgeom = child->get_geometry();
 199                 child->button_release(x-cgeom.x, y-cgeom.y, btn);
 200         }
 201 }
 202
 203 void Container::pointer_motion(int x, int y)
 204 {
 205         Widget *child = get_pointer_target(x, y, false);
 206         if(!pointer_grabbed)
 207                 set_pointer_focus((!click_focus || child->get_geometry().is_inside(x, y)) ? child : 0);
 208
 209         if(child)
 210         {
 211                 const Geometry &cgeom = child->get_geometry();
 212                 child->pointer_motion(x-cgeom.x, y-cgeom.y);
 213         }
 214 }
 215
 216 Widget *Container::get_pointer_target(int x, int y, bool touch) const
 217 {
 218         if(pointer_grabbed)
 219                 return pointer_focus;
 220         else if(!touch && click_focus)
 221                 return click_focus;
 222         else if(touch && touch_focus)
 223                 return touch_focus;
 224         else
 225         {
 226                 Widget *child = get_child_at(x, y);
 227                 if(child && child->is_enabled())
 228                         return child;
 229                 else
 230                         return 0;
 231         }
 232 }
 233
 234 void Container::pointer_leave()
 235 {
 236         Widget::pointer_leave();
 237         set_pointer_focus(0);
 238 }
 239
 240 void Container::key_press(unsigned key, unsigned mod)
 241 {
 242         if(input_focus)
 243                 input_focus->key_press(key, mod);
 244 }
 245
 246 void Container::key_release(unsigned key, unsigned mod)
 247 {
 248         if(input_focus)
 249                 input_focus->key_release(key, mod);
 250 }
 251
 252 void Container::character(wchar_t ch)
 253 {
 254         if(input_focus)
 255                 input_focus->character(ch);
 256 }
 257
 258 void Container::touch_press(int x, int y, unsigned finger)
 259 {
 260         if(Widget *child = get_pointer_target(x, y, true))
 261         {
 262                 // TODO track focus for each finger separately
 263                 if(!touch_focus)
 264                         touch_focus = child;
 265
 266                 const Geometry &cgeom = child->get_geometry();
 267                 child->touch_press(x-cgeom.x, y-cgeom.y, finger);
 268         }
 269 }
 270
 271 void Container::touch_release(int x, int y, unsigned finger)
 272 {
 273         if(Widget *child = get_pointer_target(x, y, true))
 274         {
 275                 // TODO track focus for each finger separately
 276                 if(child==touch_focus)
 277                         touch_focus = 0;
 278
 279                 const Geometry &cgeom = child->get_geometry();
 280                 child->touch_release(x-cgeom.x, y-cgeom.y, finger);
 281         }
 282 }
 283
 284 void Container::touch_motion(int x, int y, unsigned finger)
 285 {
 286         if(Widget *child = get_pointer_target(x, y, true))
 287         {
 288                 const Geometry &cgeom = child->get_geometry();
 289                 child->touch_motion(x-cgeom.x, y-cgeom.y, finger);
 290         }
 291 }
 292
 293 void Container::focus_out()
 294 {
 295         set_input_focus(0);
 296         Widget::focus_out();
 297 }
 298
 299 void Container::on_reparent()
 300 {
 301         for(list<Child *>::iterator i=children.begin(); i!=children.end(); ++i)
 302         {
 303                 if(Container *c = dynamic_cast<Container *>((*i)->widget))
 304                         c->on_reparent();
 305                 (*i)->widget->update_style();
 306         }
 307 }
 308
 309
 310 Container::Child::Child(Container &c, Widget *w):
 311         container(c),
 312         widget(w)
 313 {
 314         widget->signal_visibility_changed.connect(sigc::mem_fun(this, &Child::visibility_changed));
 315         widget->signal_request_focus.connect(sigc::mem_fun(this, &Child::request_focus));
 316         widget->signal_grab_pointer.connect(sigc::mem_fun(this, &Child::grab_pointer));
 317         widget->signal_ungrab_pointer.connect(sigc::mem_fun(this, &Child::ungrab_pointer));
 318 }
 319
 320 Container::Child::~Child()
 321 {
 322         visibility_changed(false);
 323 }
 324
 325 void Container::Child::visibility_changed(bool v)
 326 {
 327         if(!v)
 328         {
 329                 if(widget==container.click_focus)
 330                         container.click_focus = 0;
 331                 if(widget==container.pointer_focus)
 332                         container.set_pointer_focus(0);
 333                 if(widget==container.input_focus)
 334                         container.set_input_focus(0);
 335         }
 336 }
 337
 338 void Container::Child::request_focus()
 339 {
 340         container.set_input_focus(widget);
 341         if(container.parent && container.visible)
 342                 container.set_focus();
 343 }
 344
 345 void Container::Child::grab_pointer()
 346 {
 347         if(!container.pointer_grabbed)
 348         {
 349                 container.set_pointer_focus(widget);
 350                 container.pointer_grabbed = true;
 351                 container.signal_grab_pointer.emit();
 352         }
 353 }
 354
 355 void Container::Child::ungrab_pointer()
 356 {
 357         if(container.pointer_grabbed && container.pointer_focus==widget)
 358         {
 359                 // XXX Should set to the widget under pointer
 360                 container.set_pointer_focus(0);
 361                 container.pointer_grabbed = false;
 362                 container.signal_ungrab_pointer.emit();
 363         }
 364 }
 365
 366 } // namespace GLtk
 367 } // namespace Msp