source/entry.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.h>
   3 #include <msp/gl/texture.h>
   4 #include <msp/input/keys.h>
   5 #include "entry.h"
   6 #include "graphic.h"
   7 #include "part.h"
   8 #include "style.h"
   9 #include "vslider.h"
  10
  11 using namespace std;
  12
  13 namespace Msp {
  14 namespace GLtk {
  15
  16 Entry::Entry(const string &t):
  17         text(),
  18         multiline(false),
  19         edit_width(10),
  20         edit_height(1),
  21         edit_pos(0),
  22         first_row(0),
  23         visible_rows(1),
  24         text_part(0),
  25         slider(0),
  26         got_key_press(false),
  27         cursor_blink(true),
  28         selection_active(false),
  29         selection_pos(0)
  30 {
  31         input_type = INPUT_TEXT;
  32         set_text(t);
  33 }
  34
  35 void Entry::autosize_special(const Part &part, Geometry &ageom) const
  36 {
  37         if(part.get_name()=="text")
  38         {
  39                 const Sides &margin = part.get_margin();
  40                 const GL::Font &font = style->get_font();
  41                 unsigned en_width = static_cast<unsigned>(font.get_string_width("n")*style->get_font_size());
  42                 ageom.w = max(ageom.w, edit_width*en_width+margin.left+margin.right);
  43
  44                 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*style->get_font_size());
  45                 if(multiline)
  46                 {
  47                         unsigned line_spacing = style->get_font_size()*6/5;
  48                         ageom.h = max(ageom.h, line_height+line_spacing*(edit_height-1)+margin.top+margin.bottom);
  49                 }
  50                 else
  51                         ageom.h = max(ageom.h, line_height+margin.top+margin.bottom);
  52         }
  53         else if(part.get_name()=="slider" && multiline)
  54                 autosize_child(*slider, part, ageom);
  55 }
  56
  57 void Entry::set_text(const string &t)
  58 {
  59         text = t;
  60         set_edit_position(text.size());
  61 }
  62
  63 void Entry::insert(unsigned pos, const string &t)
  64 {
  65         text.insert(pos, t);
  66
  67         if(edit_pos>=pos)
  68                 edit_pos += t.size();
  69         if(selection_active && selection_pos>=pos)
  70                 selection_pos += t.size();
  71
  72         if(multiline)
  73                 check_view_range();
  74
  75         rebuild();
  76 }
  77
  78 void Entry::erase(unsigned pos, unsigned len)
  79 {
  80         text.erase(pos, len);
  81
  82         if(edit_pos>=pos+len)
  83                 edit_pos -= len;
  84         else if(edit_pos>=pos)
  85                 edit_pos = pos;
  86         if(selection_active)
  87         {
  88                 if(selection_pos>=pos+len)
  89                         selection_pos -= len;
  90                 else if(selection_pos>=pos)
  91                         selection_pos = pos;
  92         }
  93
  94         if(multiline)
  95                 check_view_range();
  96
  97         rebuild();
  98 }
  99
 100 void Entry::set_edit_position(unsigned pos)
 101 {
 102         edit_pos = min(pos, text.size());
 103         selection_active = false;
 104
 105         if(multiline)
 106                 check_view_range();
 107
 108         rebuild();
 109 }
 110
 111 bool Entry::get_selection(unsigned &start, unsigned &end) const
 112 {
 113         if(!selection_active)
 114                 return false;
 115
 116         start = selection_pos;
 117         end = edit_pos;
 118         if(start>end)
 119                 swap(start, end);
 120
 121         return true;
 122 }
 123
 124 void Entry::set_edit_size(unsigned w, unsigned h)
 125 {
 126         edit_width = w;
 127         edit_height = h;
 128         signal_autosize_changed.emit();
 129 }
 130
 131 void Entry::set_multiline(bool m)
 132 {
 133         multiline = m;
 134         if(multiline)
 135         {
 136                 if(!slider)
 137                 {
 138                         slider = new VSlider;
 139                         add(*slider);
 140                         slider->set_step(1);
 141                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
 142                         rebuild();
 143                 }
 144                 check_view_range();
 145         }
 146 }
 147
 148 void Entry::rebuild_special(const Part &part)
 149 {
 150         if(part.get_name()=="text")
 151                 text.build(part, state, geom, first_row, part_cache);
 152         else if(part.get_name()=="cursor")
 153         {
 154                 State cursor_state = (cursor_blink ? ACTIVE : NORMAL);
 155                 const Graphic *graphic = part.get_graphic(state|cursor_state);
 156                 if(!text_part || !graphic || !graphic->get_texture())
 157                         return;
 158
 159                 unsigned row, col;
 160                 text.offset_to_coords(edit_pos, row, col);
 161
 162                 if(row<first_row || row>=first_row+visible_rows)
 163                         return;
 164
 165                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 166
 167                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 168                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 169                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 170         }
 171         else if(part.get_name()=="selection")
 172         {
 173                 if(!selection_active)
 174                         return;
 175
 176                 const Graphic *graphic = part.get_graphic(state);
 177                 if(!text_part || !graphic || !graphic->get_texture())
 178                         return;
 179
 180                 unsigned start = selection_pos;
 181                 unsigned end = edit_pos;
 182                 if(start>end)
 183                         swap(start, end);
 184
 185                 unsigned row, col;
 186                 text.offset_to_coords(start, row, col);
 187                 unsigned end_row, end_col;
 188                 text.offset_to_coords(end, end_row, end_col);
 189
 190                 if(end_row<first_row || row>=first_row+visible_rows)
 191                         return;
 192
 193                 if(row<first_row)
 194                 {
 195                         row = first_row;
 196                         col = 0;
 197                 }
 198
 199                 if(end_row>=first_row+visible_rows)
 200                 {
 201                         end_row = first_row+visible_rows-1;
 202                         end_col = text.get_line_length(end_row);
 203                 }
 204
 205                 while(row<=end_row)
 206                 {
 207                         unsigned ec = (row==end_row ? end_col : text.get_line_length(row));
 208                         if(ec>col)
 209                         {
 210                                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 211                                 Geometry egeom = text.coords_to_geometry(*text_part, geom, first_row, row, ec);
 212
 213                                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 214                                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 215                                 graphic->build(egeom.x-rgeom.x, part.get_geometry().h, bld);
 216                         }
 217
 218                         ++row;
 219                         col = 0;
 220                 }
 221         }
 222         else if(part.get_name()=="slider")
 223         {
 224                 if(multiline)
 225                 {
 226                         reposition_child(*slider, part);
 227                         Widget::rebuild_special(part);
 228                 }
 229         }
 230         else
 231                 Widget::rebuild_special(part);
 232 }
 233
 234 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 235 {
 236         if(part.get_name()=="slider" && multiline)
 237                 slider->render(renderer);
 238 }
 239
 240 void Entry::touch_press(int x, int y, unsigned finger)
 241 {
 242         if(finger==0)
 243                 set_focus();
 244         Widget::touch_press(x, y, finger);
 245 }
 246
 247 bool Entry::key_press(unsigned key, unsigned mod)
 248 {
 249         got_key_press = true;
 250         if(key==Input::KEY_BACKSPACE)
 251         {
 252                 if(selection_active)
 253                         erase_selection();
 254                 else if(edit_pos>0)
 255                 {
 256                         text.erase(--edit_pos, 1);
 257                         check_view_range();
 258                         rebuild();
 259                 }
 260         }
 261         else if(key==Input::KEY_DELETE)
 262         {
 263                 if(selection_active)
 264                         erase_selection();
 265                 else
 266                         text.erase(edit_pos, 1);
 267         }
 268         else if(key==Input::KEY_ENTER && multiline)
 269         {
 270                 text.insert(edit_pos++, "\n");
 271                 check_view_range();
 272                 rebuild();
 273         }
 274         else if(key==Input::KEY_END)
 275         {
 276                 unsigned row, col;
 277                 text.offset_to_coords(edit_pos, row, col);
 278                 set_edit_position(text.coords_to_offset(row, text.get_line_length(row)), mod==MOD_SHIFT);
 279         }
 280         else if(key==Input::KEY_HOME)
 281         {
 282                 unsigned row, col;
 283                 text.offset_to_coords(edit_pos, row, col);
 284                 set_edit_position(text.coords_to_offset(row, 0), mod==MOD_SHIFT);
 285         }
 286         else if(key==Input::KEY_LEFT && mod==MOD_SHIFT)
 287                 move_edit_position(NAV_LEFT, true);
 288         else if(key==Input::KEY_RIGHT && mod==MOD_SHIFT)
 289                 move_edit_position(NAV_RIGHT, true);
 290         else if(key==Input::KEY_UP && mod==MOD_SHIFT && multiline)
 291                 move_edit_position(NAV_UP, true);
 292         else if(key==Input::KEY_DOWN && mod==MOD_SHIFT && multiline)
 293                 move_edit_position(NAV_DOWN, true);
 294         else
 295                 return false;
 296
 297         return true;
 298 }
 299
 300 bool Entry::character(wchar_t ch)
 301 {
 302         if(got_key_press && ch>=' ' && ch!=0x7F)
 303         {
 304                 if(selection_active)
 305                         erase_selection();
 306                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 307                 ++edit_pos;
 308                 rebuild();
 309                 return true;
 310         }
 311
 312         return false;
 313 }
 314
 315 void Entry::focus_in()
 316 {
 317         cursor_blink = true;
 318         Widget::focus_in();
 319         check_cursor_blink();
 320 }
 321
 322 void Entry::focus_out()
 323 {
 324         Widget::focus_out();
 325         got_key_press = false;
 326         check_cursor_blink();
 327 }
 328
 329 bool Entry::navigate(Navigation nav)
 330 {
 331         if(nav==NAV_LEFT || nav==NAV_RIGHT || ((nav==NAV_DOWN || nav==NAV_UP) && multiline))
 332                 move_edit_position(nav, false);
 333         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 334                 signal_enter.emit();
 335         else
 336                 return false;
 337
 338         return true;
 339 }
 340
 341 void Entry::animate(const Time::TimeDelta &)
 342 {
 343         cursor_blink = !cursor_blink;
 344         rebuild();
 345 }
 346
 347 void Entry::on_geometry_change()
 348 {
 349         if(multiline)
 350                 check_view_range();
 351 }
 352
 353 void Entry::on_style_change()
 354 {
 355         text.set_style(style);
 356
 357         if(!style)
 358         {
 359                 text_part = 0;
 360                 return;
 361         }
 362
 363         text_part = style->get_part("text");
 364
 365         if(multiline)
 366                 check_view_range();
 367
 368         check_cursor_blink();
 369 }
 370
 371 void Entry::move_edit_position(Navigation nav, bool select)
 372 {
 373         if(nav==NAV_LEFT)
 374         {
 375                 if(edit_pos>0)
 376                         set_edit_position(edit_pos-1, select);
 377         }
 378         else if(nav==NAV_RIGHT)
 379         {
 380                 if(edit_pos<text.size())
 381                         set_edit_position(edit_pos+1, select);
 382         }
 383         else if(nav==NAV_DOWN)
 384         {
 385                 unsigned row, col;
 386                 text.offset_to_coords(edit_pos, row, col);
 387                 set_edit_position(text.coords_to_offset(row+1, col), select);
 388         }
 389         else if(nav==NAV_UP)
 390         {
 391                 unsigned row, col;
 392                 text.offset_to_coords(edit_pos, row, col);
 393                 set_edit_position((row>0 ? text.coords_to_offset(row-1, col) : 0), select);
 394         }
 395 }
 396
 397 void Entry::set_edit_position(unsigned ep, bool select)
 398 {
 399         if(select && !selection_active)
 400                 selection_pos = edit_pos;
 401         selection_active = select;
 402
 403         edit_pos = ep;
 404         check_view_range();
 405         rebuild();
 406 }
 407
 408 void Entry::erase_selection()
 409 {
 410         if(!selection_active)
 411                 return;
 412
 413         unsigned start = selection_pos;
 414         unsigned end = edit_pos;
 415         if(start>end)
 416                 swap(start, end);
 417
 418         text.erase(start, end-start);
 419         set_edit_position(start, false);
 420 }
 421
 422 void Entry::check_cursor_blink()
 423 {
 424         cursor_blink = (state&FOCUS);
 425         if((state&FOCUS) && style)
 426         {
 427                 const Part *cursor_part = style->get_part("cursor");
 428                 if(cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS))
 429                 {
 430                         set_animation_interval(Time::sec/2);
 431                         return;
 432                 }
 433         }
 434
 435         stop_animation();
 436 }
 437
 438 void Entry::check_view_range()
 439 {
 440         if(!multiline || !text_part)
 441                 return;
 442
 443         visible_rows = text.get_visible_lines(*text_part, geom, 0);
 444
 445         unsigned row, col;
 446         text.offset_to_coords(edit_pos, row, col);
 447
 448         if(first_row>row)
 449                 first_row = row;
 450         else if(row>=first_row+visible_rows)
 451                 first_row = row+1-visible_rows;
 452
 453         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 454         slider->set_range(0, scroll);
 455         slider->set_value(scroll-first_row);
 456 }
 457
 458 void Entry::slider_value_changed(double value)
 459 {
 460         if(text.get_n_lines()>visible_rows)
 461                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 462 }
 463
 464
 465 Entry::Loader::Loader(Entry &e):
 466         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 467 {
 468         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 469         add("multiline", &Loader::multiline);
 470 }
 471
 472 void Entry::Loader::multiline(bool m)
 473 {
 474         obj.set_multiline(m);
 475 }
 476
 477 } // namespace GLtk
 478 } // namespace Msp