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         else if(part.get_name()=="slider")
  82                 autosize_child(slider, part, ageom);
  83 }
  84
  85 void List::set_data(ListData &d)
  86 {
  87         if(item_factory)
  88                 item_factory->set_data(d);
  89
  90         delete observer;
  91         if(own_data)
  92                 delete data;
  93
  94         data = &d;
  95         own_data = false;
  96         observer = new DataObserver(*this);
  97
  98         for(vector<Item *>::iterator i=items.begin(); i!=items.end(); ++i)
  99                 delete *i;
 100         items.clear();
 101         unsigned n_items = data->size();
 102         for(unsigned i=0; i<n_items; ++i)
 103         {
 104                 Item *item = create_item(i);
 105                 items.push_back(item);
 106         }
 107
 108         items_changed();
 109 }
 110
 111 void List::items_changed()
 112 {
 113         signal_autosize_changed.emit();
 114         rebuild();
 115 }
 116
 117 List::Item *List::create_item(unsigned index)
 118 {
 119         Item *item = 0;
 120         if(item_factory)
 121                 item = item_factory->create_item(index);
 122         else
 123                 item = new BasicItem(data->get_string(index));
 124         add(*item);
 125         item->autosize();
 126         item->signal_autosize_changed.connect(sigc::bind(sigc::mem_fun(this, &List::item_autosize_changed), item));
 127         return item;
 128 }
 129
 130 void List::set_view_size(unsigned s)
 131 {
 132         view_size = s;
 133         signal_autosize_changed.emit();
 134 }
 135
 136 void List::set_view_all()
 137 {
 138         set_view_size(0);
 139 }
 140
 141 void List::set_selected_index(int i)
 142 {
 143         if(i>=static_cast<int>(data->size()))
 144                 throw out_of_range("List::set_selected_index");
 145
 146         if(i==sel_index)
 147                 return;
 148
 149         if(sel_index>=0)
 150                 items[sel_index]->set_active(false);
 151         if(i<0)
 152                 sel_index = -1;
 153         else
 154         {
 155                 sel_index = i;
 156                 items[sel_index]->set_active(true);
 157                 signal_item_selected.emit(sel_index);
 158         }
 159 }
 160
 161 void List::rebuild_special(const Part &part)
 162 {
 163         if(part.get_name()=="slider")
 164                 reposition_child(slider, part);
 165         else if(part.get_name()=="items")
 166         {
 167                 const Sides &margin = part.get_margin();
 168                 unsigned w = geom.w-min(geom.w, margin.left+margin.right);
 169                 unsigned y = geom.h-min(geom.h, margin.top);
 170                 for(unsigned i=0; i<items.size(); ++i)
 171                 {
 172                         if(i<first || !y)
 173                                 items[i]->set_visible(false);
 174                         else
 175                         {
 176                                 Geometry igeom = items[i]->get_geometry();
 177                                 if(igeom.h+margin.bottom<=y)
 178                                 {
 179                                         items[i]->set_visible(true);
 180                                         y -= igeom.h;
 181                                         igeom.x = margin.left;
 182                                         igeom.y = y;
 183                                         igeom.w = w;
 184                                         items[i]->set_geometry(igeom);
 185                                 }
 186                                 else
 187                                 {
 188                                         items[i]->set_visible(false);
 189                                         y = 0;
 190                                 }
 191                         }
 192                 }
 193
 194                 check_view_range();
 195         }
 196
 197         Widget::rebuild_special(part);
 198 }
 199
 200 void List::render_special(const Part &part, GL::Renderer &renderer) const
 201 {
 202         if(part.get_name()=="items")
 203         {
 204                 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
 205                         items[i]->render(renderer);
 206         }
 207         else if(part.get_name()=="slider")
 208                 slider.render(renderer);
 209 }
 210
 211 void List::button_press(int x, int y, unsigned btn)
 212 {
 213         Container::button_press(x, y, btn);
 214         if(click_focus && btn==1)
 215         {
 216                 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
 217                         if(click_focus==items[i])
 218                         {
 219                                 set_selected_index(i);
 220                                 break;
 221                         }
 222         }
 223 }
 224
 225 void List::item_autosize_changed(Item *item)
 226 {
 227         item->autosize();
 228         signal_autosize_changed.emit();
 229         rebuild();
 230 }
 231
 232 void List::check_view_range()
 233 {
 234         if(!style)
 235                 return;
 236
 237         unsigned h = geom.h;
 238         if(const Part *items_part = style->get_part("items"))
 239         {
 240                 const Sides &margin = items_part->get_margin();
 241                 h -= margin.top+margin.bottom;
 242         }
 243
 244         max_scroll = items.size();
 245         for(unsigned i=items.size(); i-->0; )
 246         {
 247                 unsigned ih = items[i]->get_geometry().h;
 248                 if(ih<=h)
 249                 {
 250                         h -= ih;
 251                         --max_scroll;
 252                 }
 253         }
 254
 255         if(first>max_scroll)
 256                 first = max_scroll;
 257
 258         slider.set_range(0, max_scroll);
 259         slider.set_value(max_scroll-first);
 260 }
 261
 262 void List::slider_value_changed(double value)
 263 {
 264         if(max_scroll>0)
 265         {
 266                 first = max_scroll-static_cast<unsigned>(value);
 267                 rebuild();
 268         }
 269 }
 270
 271
 272 List::DataObserver::DataObserver(List &l):
 273         list(l)
 274 {
 275         list.data->signal_item_added.connect(sigc::mem_fun(this, &DataObserver::item_added));
 276         list.data->signal_item_removed.connect(sigc::mem_fun(this, &DataObserver::item_removed));
 277         list.data->signal_cleared.connect(sigc::mem_fun(this, &DataObserver::cleared));
 278         list.data->signal_refresh_item.connect(sigc::mem_fun(this, &DataObserver::refresh_item));
 279 }
 280
 281 void List::DataObserver::item_added(unsigned i)
 282 {
 283         if(list.sel_index>=static_cast<int>(i))
 284                 ++list.sel_index;
 285
 286         Item *item = list.create_item(i);
 287         list.items.insert(list.items.begin()+i, item);
 288         list.items_changed();
 289 }
 290
 291 void List::DataObserver::item_removed(unsigned i)
 292 {
 293         if(list.sel_index>static_cast<int>(i))
 294                 --list.sel_index;
 295         else if(list.sel_index==static_cast<int>(i))
 296                 list.sel_index = -1;
 297
 298         delete list.items[i];
 299         list.items.erase(list.items.begin()+i);
 300         list.items_changed();
 301 }
 302
 303 void List::DataObserver::cleared()
 304 {
 305         list.sel_index = -1;
 306         for(vector<Item *>::iterator i=list.items.begin(); i!=list.items.end(); ++i)
 307                 delete *i;
 308         list.items.clear();
 309         list.items_changed();
 310 }
 311
 312 void List::DataObserver::refresh_item(unsigned i)
 313 {
 314         delete list.items[i];
 315         // Avoid stale pointer while create_item is executing
 316         list.items[i] = 0;
 317         list.items[i] = list.create_item(i);
 318         list.items_changed();
 319 }
 320
 321
 322 void List::Item::autosize_special(const Part &part, Geometry &ageom) const
 323 {
 324         if(part.get_name()=="children")
 325         {
 326                 const Sides &margin = part.get_margin();
 327                 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 328                 {
 329                         Geometry cgeom;
 330                         (*i)->widget->autosize(cgeom);
 331                         ageom.w = max(ageom.w, cgeom.x+cgeom.w+margin.right);
 332                         ageom.h = max(ageom.h, cgeom.y+cgeom.h+margin.top);
 333                 }
 334         }
 335 }
 336
 337 void List::Item::set_active(bool a)
 338 {
 339         set_state(ACTIVE, (a ? ACTIVE : NORMAL));
 340 }
 341
 342 void List::Item::render_special(const Part &part, GL::Renderer &renderer) const
 343 {
 344         if(part.get_name()=="children")
 345         {
 346                 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 347                         (*i)->widget->render(renderer);
 348         }
 349 }
 350
 351
 352 void List::MultiColumnItem::check_widths(vector<unsigned> &widths) const
 353 {
 354         if(widths.size()<children.size())
 355                 widths.resize(children.size(), 0);
 356
 357         unsigned n = 0;
 358         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
 359         {
 360                 Geometry cgeom;
 361                 (*i)->widget->autosize(cgeom);
 362                 // TODO invent a better way to specify spacings
 363                 widths[n] = max(widths[n], cgeom.w+8);
 364         }
 365 }
 366
 367 void List::MultiColumnItem::set_widths(const vector<unsigned> &widths)
 368 {
 369         if(!style)
 370                 return;
 371
 372         const Part *part = style->get_part("children");
 373         if(!part)
 374                 return;
 375
 376         const Sides &margin = part->get_margin();
 377         int x = margin.left;
 378         unsigned n = 0;
 379         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
 380         {
 381                 (*i)->widget->set_position(x, margin.bottom);
 382                 x += widths[n];
 383         }
 384 }
 385
 386 void List::MultiColumnItem::on_style_change()
 387 {
 388         if(!style)
 389                 return;
 390
 391         for(std::list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 392                 (*i)->widget->autosize();
 393
 394         vector<unsigned> widths;
 395         List *list = static_cast<List *>(parent);
 396         for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
 397                 if(*i!=this)
 398                         if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
 399                                 mci->check_widths(widths);
 400
 401         vector<unsigned> self_widths(widths);
 402         check_widths(self_widths);
 403         bool update_all = false;
 404         for(unsigned i=0; (!update_all && i<widths.size() && i<self_widths.size()); ++i)
 405                 update_all = self_widths[i]>widths[i];
 406
 407         if(update_all)
 408         {
 409                 for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
 410                         if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
 411                                 mci->set_widths(self_widths);
 412         }
 413         else
 414                 set_widths(self_widths);
 415 }
 416
 417
 418 List::BasicItem::BasicItem(const string &text):
 419         label(text)
 420 {
 421         add(label);
 422 }
 423
 424 void List::BasicItem::on_style_change()
 425 {
 426         if(!style)
 427                 return;
 428
 429         label.autosize();
 430         if(const Part *part = style->get_part("children"))
 431         {
 432                 const Sides &margin = part->get_margin();
 433                 label.set_position(margin.left, margin.bottom);
 434         }
 435 }
 436
 437
 438 List::Loader::Loader(List &l):
 439         DataFile::DerivedObjectLoader<List, Widget::Loader>(l)
 440 {
 441         add("item", &Loader::item);
 442         add("view_size", &List::view_size);
 443 }
 444
 445 void List::Loader::item(const string &v)
 446 {
 447         dynamic_cast<BasicListData<string> &>(*obj.data).append(v);
 448 }
 449
 450 } // namespace GLtk
 451 } // namespace Msp