source/list.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.h>
   3 #include "graphic.h"
   4 #include "list.h"
   5 #include "part.h"
   6 #include "style.h"
   7 #include "text.h"
   8 #include "vslider.h"
   9
  10 using namespace std;
  11
  12 namespace Msp {
  13 namespace GLtk {
  14
  15 List::List():
  16         sel_index(-1),
  17         first(0),
  18         n_visible(1),
  19         row_height(1),
  20         items_part(0)
  21 {
  22         add(slider);
  23         slider.set_step(1);
  24         slider.signal_value_changed.connect(sigc::mem_fun(this, &List::slider_value_changed));
  25 }
  26
  27 void List::autosize()
  28 {
  29         autosize_rows(5);
  30 }
  31
  32 void List::autosize_rows(unsigned n)
  33 {
  34         if(!style)
  35                 return;
  36
  37         Widget::autosize();
  38
  39         if(items_part)
  40         {
  41                 const Sides &margin = items_part->get_margin();
  42                 const GL::Font &font = style->get_font();
  43                 float font_size = style->get_font_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>(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         rebuild();
  77 }
  78
  79 void List::autosize_all()
  80 {
  81         autosize_rows(items.size());
  82 }
  83
  84 void List::append(const string &v)
  85 {
  86         items.push_back(v);
  87         items_changed();
  88 }
  89
  90 void List::insert(unsigned i, const string &v)
  91 {
  92         if(i>items.size())
  93                 throw out_of_range("List::insert");
  94
  95         items.insert(items.begin()+i, v);
  96         items_changed();
  97 }
  98
  99 void List::remove(unsigned i)
 100 {
 101         if(i>items.size())
 102                 throw out_of_range("List::remove");
 103
 104         items.erase(items.begin()+i);
 105         if(sel_index>static_cast<int>(i))
 106                 --sel_index;
 107         else if(sel_index==static_cast<int>(i))
 108                 sel_index = -1;
 109
 110         items_changed();
 111 }
 112
 113 void List::clear()
 114 {
 115         items.clear();
 116         sel_index = -1;
 117         items_changed();
 118 }
 119
 120 void List::items_changed()
 121 {
 122         check_view_range();
 123         signal_autosize_changed.emit();
 124         rebuild();
 125 }
 126
 127 void List::set_selected_index(int i)
 128 {
 129         if(i<0)
 130                 sel_index = -1;
 131         else if(i<static_cast<int>(items.size()))
 132         {
 133                 sel_index = i;
 134                 signal_item_selected.emit(sel_index, items[sel_index]);
 135                 rebuild();
 136         }
 137         else
 138                 throw out_of_range("List::set_selected_index");
 139 }
 140
 141 const string &List::get_selected() const
 142 {
 143         if(sel_index<0)
 144                 throw logic_error("sel_index<0");
 145
 146         return items[sel_index];
 147 }
 148
 149 void List::rebuild_special(const Part &part, CachedPart &cache)
 150 {
 151         if(part.get_name()=="items")
 152         {
 153                 const Sides &margin = part.get_margin();
 154                 Geometry pgeom = geom;
 155                 pgeom.h = row_height+margin.top+margin.bottom;
 156
 157                 const GL::Font &font = style->get_font();
 158                 cache.texture = &font.get_texture();
 159                 cache.clear_mesh();
 160
 161                 GL::MeshBuilder bld(*cache.mesh);
 162                 bld.color(style->get_font_color());
 163                 bld.matrix() *= GL::Matrix::translation(margin.left, geom.h-pgeom.h-font.get_descent()*style->get_font_size(), 0);
 164
 165                 for(unsigned i=0; (i<n_visible && first+i<items.size()); ++i)
 166                 {
 167                         if(i!=0)
 168                                 bld.matrix() *= GL::Matrix::translation(0, -static_cast<int>(row_height), 0);
 169
 170                         GL::MatrixStack::Push _pushm(bld.matrix());
 171                         bld.matrix() *= GL::Matrix::scaling(style->get_font_size());
 172
 173                         style->get_font().build_string(items[first+i], bld);
 174                 }
 175         }
 176         else if(part.get_name()=="selection")
 177         {
 178                 if(sel_index>=static_cast<int>(first) && sel_index<static_cast<int>(first+n_visible))
 179                 {
 180                         const Sides &margin = part.get_margin();
 181
 182                         Geometry pgeom = geom;
 183                         pgeom.h = row_height;
 184                         pgeom.w -= margin.left+margin.right;
 185
 186                         Geometry rgeom = part.get_geometry();
 187                         rgeom.y += geom.h-margin.top-row_height*(sel_index-first+1);
 188                         rgeom.x += margin.left;
 189                         part.get_alignment().apply(rgeom, pgeom);
 190
 191                         cache.texture = part.get_graphic(state)->get_texture();
 192                         cache.clear_mesh();
 193
 194                         GL::MeshBuilder bld(*cache.mesh);
 195                         bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 196                         part.get_graphic(state)->build(rgeom.w, rgeom.h, bld);
 197                 }
 198                 else
 199                         cache.texture = 0;
 200         }
 201 }
 202
 203 void List::render_special(const Part &part, GL::Renderer &renderer) const
 204 {
 205         if(part.get_name()=="slider")
 206                 slider.render(renderer);
 207 }
 208
 209 void List::button_press(int x, int y, unsigned btn)
 210 {
 211         Container::button_press(x, y, btn);
 212         if(!click_focus && btn==1)
 213         {
 214                 if(items_part)
 215                         y += items_part->get_margin().top;
 216
 217                 unsigned i = (geom.h-1-y)/row_height;
 218                 if(i<n_visible && first+i<items.size())
 219                 {
 220                         sel_index = first+i;
 221
 222                         signal_item_selected.emit(sel_index, items[sel_index]);
 223                         rebuild();
 224                 }
 225         }
 226 }
 227
 228 void List::on_geometry_change()
 229 {
 230         reposition_slider();
 231
 232         check_view_range();
 233 }
 234
 235 void List::on_style_change()
 236 {
 237         if(!style)
 238         {
 239                 items_part = 0;
 240                 return;
 241         }
 242
 243         reposition_slider();
 244
 245         items_part = style->get_part("items");
 246
 247         const GL::Font &font = style->get_font();
 248         row_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*style->get_font_size());
 249
 250         check_view_range();
 251 }
 252
 253 void List::reposition_slider()
 254 {
 255         if(!style)
 256                 return;
 257
 258         if(const Part *slider_part = style->get_part("slider"))
 259         {
 260                 Geometry sgeom = slider_part->get_geometry();
 261                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 262                 slider.set_geometry(sgeom);
 263         }
 264 }
 265
 266 void List::check_view_range()
 267 {
 268         unsigned h = geom.h;
 269         if(items_part)
 270         {
 271                 const Sides &margin = items_part->get_margin();
 272                 h -= margin.top+margin.bottom;
 273         }
 274
 275         n_visible = h/row_height;
 276
 277         if(first+n_visible>items.size())
 278         {
 279                 if(items.size()>n_visible)
 280                         first = items.size()-n_visible;
 281                 else
 282                         first = 0;
 283         }
 284
 285         if(items.size()>n_visible)
 286         {
 287                 slider.set_range(0, items.size()-n_visible);
 288                 slider.set_value(items.size()-n_visible-first);
 289         }
 290         else
 291         {
 292                 slider.set_range(0, 0);
 293                 slider.set_value(0);
 294         }
 295 }
 296
 297 void List::slider_value_changed(double value)
 298 {
 299         if(items.size()>n_visible)
 300         {
 301                 first = items.size()-n_visible-static_cast<unsigned>(value);
 302                 rebuild();
 303         }
 304 }
 305
 306
 307 List::Loader::Loader(List &l):
 308         Widget::Loader(l)
 309 {
 310         add("item", &Loader::item);
 311 }
 312
 313 void List::Loader::item(const string &v)
 314 {
 315         dynamic_cast<List &>(obj).append(v);
 316 }
 317
 318 } // namespace GLtk
 319 } // namespace Msp