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