source/container.cpp

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