source/list.cpp

   1 #include <msp/gl/immediate.h>
   2 #include <msp/gl/matrix.h>
   3 #include <msp/gl/transform.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 List::List():
  17         sel_index(-1),
  18         first(0),
  19         n_visible(1),
  20         row_height(1),
  21         items_part(0)
  22 {
  23         add(slider);
  24         slider.set_step(1);
  25         slider.signal_value_changed.connect(sigc::mem_fun(this, &List::slider_value_changed));
  26 }
  27
  28 void List::autosize()
  29 {
  30         autosize_rows(5);
  31 }
  32
  33 void List::autosize_rows(unsigned n)
  34 {
  35         if(!style)
  36                 return;
  37
  38         Widget::autosize();
  39
  40         if(items_part)
  41         {
  42                 const Sides &margin = items_part->get_margin();
  43                 float font_size = style->get_font()->get_default_size();
  44
  45                 unsigned max_w = 0;
  46                 for(vector<string>::iterator i=items.begin(); i!=items.end(); ++i)
  47                 {
  48                         unsigned w = static_cast<unsigned>(style->get_font()->get_string_width(*i)*font_size);
  49                         max_w = max(max_w, w);
  50                 }
  51
  52                 geom.w = max(geom.w, max_w+margin.left+margin.right);
  53                 geom.h = max(geom.h, n*row_height+margin.top+margin.bottom);
  54         }
  55
  56         if(const Part *slider_part = style->get_part("slider"))
  57         {
  58                 Geometry sgeom = slider_part->get_geometry();
  59                 if(!sgeom.w || !sgeom.h)
  60                 {
  61                         slider.autosize();
  62                         if(!sgeom.w)
  63                                 sgeom.w = slider.get_geometry().w;
  64                         if(!sgeom.h)
  65                                 sgeom.h = slider.get_geometry().h;
  66                 }
  67
  68                 const Sides &margin = slider_part->get_margin();
  69                 geom.w = max(geom.w, sgeom.w+margin.left+margin.right);
  70                 geom.h = max(geom.h, sgeom.h+margin.top+margin.bottom);
  71
  72                 reposition_slider();
  73         }
  74
  75         check_view_range();
  76 }
  77
  78 void List::autosize_all()
  79 {
  80         autosize_rows(items.size());
  81 }
  82
  83 void List::append(const string &v)
  84 {
  85         items.push_back(v);
  86         check_view_range();
  87         signal_autosize_changed.emit();
  88 }
  89
  90 void List::insert(unsigned i, const string &v)
  91 {
  92         if(i>items.size())
  93                 throw InvalidParameterValue("Index out of range");
  94
  95         items.insert(items.begin()+i, v);
  96         check_view_range();
  97         signal_autosize_changed.emit();
  98 }
  99
 100 void List::remove(unsigned i)
 101 {
 102         if(i>items.size())
 103                 throw InvalidParameterValue("Index out of range");
 104
 105         items.erase(items.begin()+i);
 106         if(sel_index>static_cast<int>(i))
 107                 --sel_index;
 108         else if(sel_index==static_cast<int>(i))
 109                 sel_index = -1;
 110
 111         check_view_range();
 112         signal_autosize_changed.emit();
 113 }
 114
 115 void List::clear()
 116 {
 117         items.clear();
 118         sel_index = -1;
 119
 120         check_view_range();
 121         signal_autosize_changed.emit();
 122 }
 123
 124 void List::set_selected_index(int i)
 125 {
 126         if(i<0)
 127                 sel_index = -1;
 128         else if(i<static_cast<int>(items.size()))
 129         {
 130                 sel_index = i;
 131                 signal_item_selected.emit(sel_index, items[sel_index]);
 132         }
 133         else
 134                 throw InvalidParameterValue("Index out of range");
 135 }
 136
 137 const string &List::get_selected() const
 138 {
 139         if(sel_index<0)
 140                 throw InvalidState("No selection");
 141
 142         return items[sel_index];
 143 }
 144
 145 void List::render_special(const Part &part) const
 146 {
 147         if(part.get_name()=="items")
 148         {
 149                 const Sides &margin = part.get_margin();
 150                 Geometry pgeom = geom;
 151                 pgeom.h = row_height+margin.top+margin.bottom;
 152
 153                 GL::PushMatrix push_mtx;
 154                 GL::translate(0, geom.h-pgeom.h, 0);
 155
 156                 for(unsigned i=0; (i<n_visible && first+i<items.size()); ++i)
 157                 {
 158                         if(i!=0)
 159                                 GL::translate(0, -static_cast<int>(row_height), 0);
 160                         Text(*style, items[first+i]).render(part, pgeom);
 161                 }
 162         }
 163         else if(part.get_name()=="selection")
 164         {
 165                 if(sel_index>=static_cast<int>(first) && sel_index<static_cast<int>(first+n_visible))
 166                 {
 167                         const Sides &margin = part.get_margin();
 168
 169                         Geometry pgeom = geom;
 170                         pgeom.h = row_height;
 171                         pgeom.w -= margin.left+margin.right;
 172
 173                         Geometry rgeom = part.get_geometry();
 174                         rgeom.y += geom.h-margin.top-row_height*(sel_index-first+1);
 175                         rgeom.x += margin.left;
 176                         part.get_alignment().apply(rgeom, pgeom);
 177
 178                         GL::push_matrix();
 179                         GL::translate(rgeom.x, rgeom.y, 0);
 180                         part.get_graphic(state)->render(rgeom.w, rgeom.h);
 181                         GL::pop_matrix();
 182                 }
 183         }
 184         else if(part.get_name()=="slider")
 185                 slider.render();
 186 }
 187
 188 void List::button_press(int x, int y, unsigned btn)
 189 {
 190         Container::button_press(x, y, btn);
 191         if(!click_focus && btn==1)
 192         {
 193                 if(items_part)
 194                         y += items_part->get_margin().top;
 195
 196                 unsigned i = (geom.h-1-y)/row_height;
 197                 if(i<n_visible && first+i<items.size())
 198                 {
 199                         sel_index = first+i;
 200
 201                         signal_item_selected.emit(sel_index, items[sel_index]);
 202                 }
 203         }
 204 }
 205
 206 void List::on_geometry_change()
 207 {
 208         reposition_slider();
 209
 210         check_view_range();
 211 }
 212
 213 void List::on_style_change()
 214 {
 215         if(!style)
 216         {
 217                 items_part = 0;
 218                 return;
 219         }
 220
 221         reposition_slider();
 222
 223         items_part = style->get_part("items");
 224
 225         const GL::Font &font = *style->get_font();
 226         row_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font.get_default_size());
 227
 228         check_view_range();
 229 }
 230
 231 void List::reposition_slider()
 232 {
 233         if(!style)
 234                 return;
 235
 236         if(const Part *slider_part = style->get_part("slider"))
 237         {
 238                 Geometry sgeom = slider_part->get_geometry();
 239                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 240                 slider.set_geometry(sgeom);
 241         }
 242 }
 243
 244 void List::check_view_range()
 245 {
 246         unsigned h = geom.h;
 247         if(items_part)
 248         {
 249                 const Sides &margin = items_part->get_margin();
 250                 h -= margin.top+margin.bottom;
 251         }
 252
 253         n_visible = h/row_height;
 254
 255         if(first+n_visible>items.size())
 256         {
 257                 if(items.size()>n_visible)
 258                         first = items.size()-n_visible;
 259                 else
 260                         first = 0;
 261         }
 262
 263         if(items.size()>n_visible)
 264         {
 265                 slider.set_range(0, items.size()-n_visible);
 266                 slider.set_value(items.size()-n_visible-first);
 267         }
 268         else
 269         {
 270                 slider.set_range(0, 0);
 271                 slider.set_value(0);
 272         }
 273 }
 274
 275 void List::slider_value_changed(double value)
 276 {
 277         if(items.size()>n_visible)
 278                 first = items.size()-n_visible-static_cast<unsigned>(value);
 279 }
 280
 281
 282 List::Loader::Loader(List &l):
 283         Widget::Loader(l)
 284 {
 285         add("item", &Loader::item);
 286 }
 287
 288 void List::Loader::item(const string &v)
 289 {
 290         dynamic_cast<List &>(obj).append(v);
 291 }
 292
 293 } // namespace GLtk
 294 } // namespace Msp