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