source/list.cpp

   1 #include <msp/debug/demangle.h>
   2 #include <msp/gl/matrix.h>
   3 #include <msp/gl/meshbuilder.h>
   4 #include "graphic.h"
   5 #include "list.h"
   6 #include "part.h"
   7 #include "style.h"
   8 #include "text.h"
   9 #include "vslider.h"
  10
  11 using namespace std;
  12
  13 namespace Msp {
  14 namespace GLtk {
  15
  16 incompatible_data::incompatible_data(const type_info &ti):
  17         logic_error("expected "+Debug::demangle(ti.name()))
  18 { }
  19
  20
  21 List::List():
  22         data(new BasicListData<string>),
  23         own_data(true)
  24 {
  25         init();
  26 }
  27
  28 List::List(ListData &d):
  29         data(&d),
  30         own_data(false)
  31 {
  32         init();
  33 }
  34
  35 void List::init()
  36 {
  37         item_factory = 0;
  38         sel_index = -1;
  39         first = 0;
  40         max_scroll = 0;
  41         view_size = 5;
  42
  43         observer = new DataObserver(*this);
  44
  45         add(slider);
  46         slider.set_step(1);
  47         slider.signal_value_changed.connect(sigc::mem_fun(this, &List::slider_value_changed));
  48 }
  49
  50 List::~List()
  51 {
  52         delete item_factory;
  53         delete observer;
  54         if(own_data)
  55                 delete data;
  56 }
  57
  58 void List::autosize_special(const Part &part, Geometry &ageom) const
  59 {
  60         if(part.get_name()=="items")
  61         {
  62                 const Sides &margin = part.get_margin();
  63
  64                 unsigned max_w = 0;
  65                 unsigned total_h = 0;
  66                 for(unsigned i=0; i<items.size(); ++i)
  67                 {
  68                         Geometry igeom;
  69                         items[i]->autosize(igeom);
  70                         max_w = max(max_w, igeom.w);
  71                         if(view_size==0 || i<view_size)
  72                                 total_h += igeom.h;
  73                 }
  74
  75                 if(!items.empty() && items.size()<view_size)
  76                         total_h = total_h*view_size/items.size();
  77
  78                 ageom.w = max(ageom.w, max_w+margin.left+margin.right);
  79                 ageom.h = max(ageom.h, total_h+margin.top+margin.bottom);
  80         }
  81 }
  82
  83 void List::set_data(ListData &d)
  84 {
  85         if(item_factory)
  86                 item_factory->set_data(d);
  87
  88         delete observer;
  89         if(own_data)
  90                 delete data;
  91
  92         data = &d;
  93         own_data = false;
  94         observer = new DataObserver(*this);
  95
  96         for(vector<Item *>::iterator i=items.begin(); i!=items.end(); ++i)
  97                 delete *i;
  98         items.clear();
  99         unsigned n_items = data->size();
 100         for(unsigned i=0; i<n_items; ++i)
 101         {
 102                 Item *item = create_item(i);
 103                 items.push_back(item);
 104         }
 105
 106         items_changed();
 107 }
 108
 109 void List::items_changed()
 110 {
 111         check_view_range();
 112         signal_autosize_changed.emit();
 113         reposition_items();
 114 }
 115
 116 List::Item *List::create_item(unsigned index)
 117 {
 118         Item *item = 0;
 119         if(item_factory)
 120                 item = item_factory->create_item(index);
 121         else
 122                 item = new BasicItem(data->get_string(index));
 123         add(*item);
 124         item->autosize();
 125         item->signal_autosize_changed.connect(sigc::mem_fun(this, &List::item_autosize_changed));
 126         return item;
 127 }
 128
 129 void List::set_view_size(unsigned s)
 130 {
 131         view_size = s;
 132         signal_autosize_changed.emit();
 133 }
 134
 135 void List::set_view_all()
 136 {
 137         set_view_size(0);
 138 }
 139
 140 void List::set_selected_index(int i)
 141 {
 142         if(i>=static_cast<int>(data->size()))
 143                 throw out_of_range("List::set_selected_index");
 144
 145         if(i==sel_index)
 146                 return;
 147
 148         if(sel_index>=0)
 149                 items[sel_index]->set_active(false);
 150         if(i<0)
 151                 sel_index = -1;
 152         else
 153         {
 154                 sel_index = i;
 155                 items[sel_index]->set_active(true);
 156                 signal_item_selected.emit(sel_index);
 157         }
 158 }
 159
 160 void List::render_special(const Part &part, GL::Renderer &renderer) const
 161 {
 162         if(part.get_name()=="items")
 163         {
 164                 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
 165                         items[i]->render(renderer);
 166         }
 167         else if(part.get_name()=="slider")
 168                 slider.render(renderer);
 169 }
 170
 171 void List::button_press(int x, int y, unsigned btn)
 172 {
 173         Container::button_press(x, y, btn);
 174         if(click_focus && btn==1)
 175         {
 176                 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
 177                         if(click_focus==items[i])
 178                         {
 179                                 set_selected_index(i);
 180                                 break;
 181                         }
 182         }
 183 }
 184
 185 void List::on_geometry_change()
 186 {
 187         reposition_slider();
 188         reposition_items();
 189
 190         check_view_range();
 191 }
 192
 193 void List::on_style_change()
 194 {
 195         if(!style)
 196                 return;
 197
 198         reposition_slider();
 199         reposition_items();
 200
 201         check_view_range();
 202 }
 203
 204 void List::reposition_slider()
 205 {
 206         if(!style)
 207                 return;
 208
 209         if(const Part *slider_part = style->get_part("slider"))
 210         {
 211                 Geometry sgeom = slider_part->get_geometry();
 212                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 213                 slider.set_geometry(sgeom);
 214         }
 215 }
 216
 217 void List::item_autosize_changed()
 218 {
 219         signal_autosize_changed.emit();
 220         reposition_items();
 221 }
 222
 223 void List::reposition_items()
 224 {
 225         if(!style)
 226                 return;
 227
 228         if(const Part *items_part = style->get_part("items"))
 229         {
 230                 const Sides &margin = items_part->get_margin();
 231                 unsigned w = geom.w-min(geom.w, margin.left+margin.right);
 232                 unsigned y = geom.h-min(geom.h, margin.top);
 233                 for(unsigned i=0; i<items.size(); ++i)
 234                 {
 235                         if(i<first || !y)
 236                                 items[i]->set_visible(false);
 237                         else
 238                         {
 239                                 Geometry igeom;
 240                                 items[i]->autosize(igeom);
 241                                 if(igeom.h+margin.bottom<=y)
 242                                 {
 243                                         items[i]->set_visible(true);
 244                                         y -= igeom.h;
 245                                         igeom.x = margin.left;
 246                                         igeom.y = y;
 247                                         igeom.w = w;
 248                                         items[i]->set_geometry(igeom);
 249                                 }
 250                                 else
 251                                 {
 252                                         items[i]->set_visible(false);
 253                                         y = 0;
 254                                 }
 255                         }
 256                 }
 257         }
 258 }
 259
 260 void List::check_view_range()
 261 {
 262         if(!style)
 263                 return;
 264
 265         unsigned h = geom.h;
 266         if(const Part *items_part = style->get_part("items"))
 267         {
 268                 const Sides &margin = items_part->get_margin();
 269                 h -= margin.top+margin.bottom;
 270         }
 271
 272         max_scroll = items.size();
 273         for(unsigned i=items.size(); i-->0; )
 274         {
 275                 unsigned ih = items[i]->get_geometry().h;
 276                 if(ih<=h)
 277                 {
 278                         h -= ih;
 279                         --max_scroll;
 280                 }
 281         }
 282
 283         if(first>max_scroll)
 284                 first = max_scroll;
 285
 286         slider.set_range(0, max_scroll);
 287         slider.set_value(max_scroll-first);
 288 }
 289
 290 void List::slider_value_changed(double value)
 291 {
 292         if(max_scroll>0)
 293         {
 294                 first = max_scroll-static_cast<unsigned>(value);
 295                 reposition_items();
 296         }
 297 }
 298
 299
 300 List::DataObserver::DataObserver(List &l):
 301         list(l)
 302 {
 303         list.data->signal_item_added.connect(sigc::mem_fun(this, &DataObserver::item_added));
 304         list.data->signal_item_removed.connect(sigc::mem_fun(this, &DataObserver::item_removed));
 305         list.data->signal_cleared.connect(sigc::mem_fun(this, &DataObserver::cleared));
 306         list.data->signal_refresh_item.connect(sigc::mem_fun(this, &DataObserver::refresh_item));
 307 }
 308
 309 void List::DataObserver::item_added(unsigned i)
 310 {
 311         if(list.sel_index>=static_cast<int>(i))
 312                 ++list.sel_index;
 313
 314         Item *item = list.create_item(i);
 315         list.items.insert(list.items.begin()+i, item);
 316         list.items_changed();
 317 }
 318
 319 void List::DataObserver::item_removed(unsigned i)
 320 {
 321         if(list.sel_index>static_cast<int>(i))
 322                 --list.sel_index;
 323         else if(list.sel_index==static_cast<int>(i))
 324                 list.sel_index = -1;
 325
 326         delete list.items[i];
 327         list.items.erase(list.items.begin()+i);
 328         list.items_changed();
 329 }
 330
 331 void List::DataObserver::cleared()
 332 {
 333         list.sel_index = -1;
 334         for(vector<Item *>::iterator i=list.items.begin(); i!=list.items.end(); ++i)
 335                 delete *i;
 336         list.items.clear();
 337         list.items_changed();
 338 }
 339
 340 void List::DataObserver::refresh_item(unsigned i)
 341 {
 342         delete list.items[i];
 343         list.items[i] = list.create_item(i);
 344         list.items_changed();
 345 }
 346
 347
 348 void List::Item::autosize_special(const Part &part, Geometry &ageom) const
 349 {
 350         if(part.get_name()=="children")
 351         {
 352                 const Sides &margin = part.get_margin();
 353                 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 354                 {
 355                         const Geometry &cgeom = (*i)->widget->get_geometry();
 356                         ageom.w = max(ageom.w, cgeom.x+cgeom.w+margin.right);
 357                         ageom.h = max(ageom.h, cgeom.y+cgeom.h+margin.top);
 358                 }
 359         }
 360 }
 361
 362 void List::Item::set_active(bool a)
 363 {
 364         set_state(ACTIVE, (a ? ACTIVE : NORMAL));
 365 }
 366
 367 void List::Item::render_special(const Part &part, GL::Renderer &renderer) const
 368 {
 369         if(part.get_name()=="children")
 370         {
 371                 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 372                         (*i)->widget->render(renderer);
 373         }
 374 }
 375
 376
 377 List::BasicItem::BasicItem(const string &text):
 378         label(text)
 379 {
 380         add(label);
 381 }
 382
 383 void List::BasicItem::on_style_change()
 384 {
 385         if(!style)
 386                 return;
 387
 388         label.autosize();
 389         if(const Part *part = style->get_part("children"))
 390         {
 391                 const Sides &margin = part->get_margin();
 392                 label.set_position(margin.left, margin.bottom);
 393         }
 394 }
 395
 396
 397 List::Loader::Loader(List &l):
 398         DataFile::DerivedObjectLoader<List, Widget::Loader>(l)
 399 {
 400         add("item", &Loader::item);
 401         add("view_size", &List::view_size);
 402 }
 403
 404 void List::Loader::item(const string &v)
 405 {
 406         dynamic_cast<BasicListData<string> &>(*obj.data).append(v);
 407 }
 408
 409 } // namespace GLtk
 410 } // namespace Msp