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 "slider.h"
   9 #include "style.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         if(t!=text.get())
  60         {
  61                 text = t;
  62                 signal_text_changed.emit(text.get());
  63         }
  64         set_edit_position(text.size());
  65 }
  66
  67 void Entry::insert(unsigned pos, const string &t)
  68 {
  69         if(t.empty())
  70                 return;
  71
  72         text.insert(pos, t);
  73         signal_text_changed.emit(text.get());
  74
  75         adjust_edit_position_for_change(pos, t.size());
  76         if(multiline)
  77                 check_view_range();
  78
  79         mark_rebuild();
  80 }
  81
  82 void Entry::erase(unsigned pos, unsigned len)
  83 {
  84         if(!len)
  85                 return;
  86
  87         text.erase(pos, len);
  88         signal_text_changed.emit(text.get());
  89
  90         adjust_edit_position_for_change(pos, -len);
  91         if(multiline)
  92                 check_view_range();
  93
  94         mark_rebuild();
  95 }
  96
  97 bool Entry::get_selection(unsigned &start, unsigned &end) const
  98 {
  99         if(!selection_active)
 100                 return false;
 101
 102         start = selection_pos;
 103         end = edit_pos;
 104         if(start>end)
 105                 swap(start, end);
 106
 107         return true;
 108 }
 109
 110 void Entry::translate_position(unsigned pos, unsigned &row, unsigned &col) const
 111 {
 112         text.offset_to_coords(pos, row, col);
 113 }
 114
 115 unsigned Entry::translate_position(unsigned row, unsigned col) const
 116 {
 117         return text.coords_to_offset(row, col);
 118 }
 119
 120 void Entry::set_edit_size(unsigned w, unsigned h)
 121 {
 122         edit_width = w;
 123         edit_height = h;
 124         signal_autosize_changed.emit();
 125 }
 126
 127 void Entry::set_multiline(bool m)
 128 {
 129         multiline = m;
 130         if(multiline)
 131         {
 132                 if(!slider)
 133                 {
 134                         slider = new VSlider;
 135                         add(*slider);
 136                         slider->set_step(1);
 137                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
 138                         mark_rebuild();
 139                 }
 140                 check_view_range();
 141         }
 142 }
 143
 144 void Entry::rebuild_special(const Part &part)
 145 {
 146         if(part.get_name()=="text")
 147                 text.build(part, state, geom, first_row, part_cache);
 148         else if(part.get_name()=="cursor")
 149         {
 150                 State cursor_state = (cursor_blink ? ACTIVE : NORMAL);
 151                 const Graphic *graphic = part.get_graphic(state|cursor_state);
 152                 if(!text_part || !graphic || !graphic->get_texture())
 153                         return;
 154
 155                 unsigned row, col;
 156                 text.offset_to_coords(edit_pos, row, col);
 157
 158                 if(row<first_row || row>=first_row+visible_rows)
 159                         return;
 160
 161                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 162
 163                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 164                 bld.transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
 165                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 166         }
 167         else if(part.get_name()=="selection")
 168         {
 169                 if(!selection_active)
 170                         return;
 171
 172                 const Graphic *graphic = part.get_graphic(state);
 173                 if(!text_part || !graphic || !graphic->get_texture())
 174                         return;
 175
 176                 unsigned start, end;
 177                 get_selection(start, end);
 178
 179                 unsigned row, col;
 180                 text.offset_to_coords(start, row, col);
 181                 unsigned end_row, end_col;
 182                 text.offset_to_coords(end, end_row, end_col);
 183
 184                 if(end_row<first_row || row>=first_row+visible_rows)
 185                         return;
 186
 187                 if(row<first_row)
 188                 {
 189                         row = first_row;
 190                         col = 0;
 191                 }
 192
 193                 if(end_row>=first_row+visible_rows)
 194                 {
 195                         end_row = first_row+visible_rows-1;
 196                         end_col = text.get_line_length(end_row);
 197                 }
 198
 199                 while(row<=end_row)
 200                 {
 201                         unsigned ec = (row==end_row ? end_col : text.get_line_length(row));
 202                         if(ec>col)
 203                         {
 204                                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 205                                 Geometry egeom = text.coords_to_geometry(*text_part, geom, first_row, row, ec);
 206
 207                                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 208                                 bld.transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
 209                                 graphic->build(egeom.x-rgeom.x, part.get_geometry().h, bld);
 210                         }
 211
 212                         ++row;
 213                         col = 0;
 214                 }
 215         }
 216         else if(part.get_name()=="slider")
 217         {
 218                 if(multiline)
 219                 {
 220                         reposition_child(*slider, part);
 221                         Widget::rebuild_special(part);
 222                 }
 223         }
 224         else
 225                 Widget::rebuild_special(part);
 226 }
 227
 228 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 229 {
 230         if(part.get_name()=="slider" && multiline)
 231                 slider->render(renderer);
 232 }
 233
 234 void Entry::touch_press(int x, int y, unsigned finger)
 235 {
 236         if(finger==0)
 237                 set_focus();
 238         Widget::touch_press(x, y, finger);
 239 }
 240
 241 bool Entry::key_press(unsigned key, unsigned mod)
 242 {
 243         got_key_press = true;
 244         if(key==Input::KEY_BACKSPACE)
 245         {
 246                 if(selection_active)
 247                         erase_selection(true);
 248                 else if(edit_pos>0)
 249                 {
 250                         unsigned start_pos = text.move_offset(edit_pos, -1);
 251                         erase(start_pos, edit_pos-start_pos);
 252                 }
 253         }
 254         else if(key==Input::KEY_DELETE)
 255         {
 256                 if(selection_active)
 257                         erase_selection(true);
 258                 else
 259                 {
 260                         unsigned end_pos = text.move_offset(edit_pos, 1);
 261                         erase(edit_pos, end_pos-edit_pos);
 262                 }
 263         }
 264         else if(key==Input::KEY_ENTER && multiline)
 265                 insert(edit_pos, "\n");
 266         else if(key==Input::KEY_END)
 267         {
 268                 unsigned row, col;
 269                 text.offset_to_coords(edit_pos, row, col);
 270                 set_edit_position(text.coords_to_offset(row, text.get_line_length(row)), mod==MOD_SHIFT);
 271         }
 272         else if(key==Input::KEY_HOME)
 273         {
 274                 unsigned row, col;
 275                 text.offset_to_coords(edit_pos, row, col);
 276                 set_edit_position(text.coords_to_offset(row, 0), mod==MOD_SHIFT);
 277         }
 278         else if(key==Input::KEY_PGUP)
 279         {
 280                 unsigned row, col;
 281                 text.offset_to_coords(edit_pos, row, col);
 282                 set_edit_position(text.coords_to_offset((row<visible_rows ? 0 : row-visible_rows), col), mod==MOD_SHIFT);
 283         }
 284         else if(key==Input::KEY_PGDN)
 285         {
 286                 unsigned row, col;
 287                 text.offset_to_coords(edit_pos, row, col);
 288                 set_edit_position(text.coords_to_offset(row+visible_rows, col), mod==MOD_SHIFT);
 289         }
 290         else if(key==Input::KEY_LEFT && mod==MOD_SHIFT)
 291                 move_edit_position(NAV_LEFT, true);
 292         else if(key==Input::KEY_RIGHT && mod==MOD_SHIFT)
 293                 move_edit_position(NAV_RIGHT, true);
 294         else if(key==Input::KEY_UP && mod==MOD_SHIFT && multiline)
 295                 move_edit_position(NAV_UP, true);
 296         else if(key==Input::KEY_DOWN && mod==MOD_SHIFT && multiline)
 297                 move_edit_position(NAV_DOWN, true);
 298         else
 299                 return false;
 300
 301         return true;
 302 }
 303
 304 bool Entry::character(wchar_t ch)
 305 {
 306         if(got_key_press && ch>=' ' && ch!=0x7F)
 307         {
 308                 if(selection_active)
 309                         erase_selection(false);
 310                 insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 311                 return true;
 312         }
 313
 314         return false;
 315 }
 316
 317 void Entry::focus_in()
 318 {
 319         cursor_blink = true;
 320         Widget::focus_in();
 321         check_cursor_blink();
 322 }
 323
 324 void Entry::focus_out()
 325 {
 326         Widget::focus_out();
 327         got_key_press = false;
 328         check_cursor_blink();
 329 }
 330
 331 bool Entry::navigate(Navigation nav)
 332 {
 333         if(nav==NAV_LEFT || nav==NAV_RIGHT || ((nav==NAV_DOWN || nav==NAV_UP) && multiline))
 334                 move_edit_position(nav, false);
 335         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 336                 signal_enter.emit();
 337         else
 338                 return false;
 339
 340         return true;
 341 }
 342
 343 void Entry::animate(const Time::TimeDelta &)
 344 {
 345         cursor_blink = !cursor_blink;
 346         mark_rebuild();
 347 }
 348
 349 void Entry::on_size_change()
 350 {
 351         if(multiline)
 352                 check_view_range();
 353 }
 354
 355 void Entry::on_style_change()
 356 {
 357         text.set_style(style);
 358
 359         if(!style)
 360         {
 361                 text_part = 0;
 362                 return;
 363         }
 364
 365         text_part = style->get_part("text");
 366
 367         if(multiline)
 368                 check_view_range();
 369
 370         check_cursor_blink();
 371 }
 372
 373 void Entry::move_edit_position(Navigation nav, bool select)
 374 {
 375         if(nav==NAV_LEFT)
 376                 set_edit_position(text.move_offset(edit_pos, -1), select);
 377         else if(nav==NAV_RIGHT)
 378                 set_edit_position(text.move_offset(edit_pos, 1), select);
 379         else if(nav==NAV_DOWN)
 380         {
 381                 unsigned row, col;
 382                 text.offset_to_coords(edit_pos, row, col);
 383                 set_edit_position(text.coords_to_offset(row+1, col), select);
 384         }
 385         else if(nav==NAV_UP)
 386         {
 387                 unsigned row, col;
 388                 text.offset_to_coords(edit_pos, row, col);
 389                 set_edit_position((row>0 ? text.coords_to_offset(row-1, col) : 0), select);
 390         }
 391         else
 392                 throw invalid_argument("Entry::move_edit_position");
 393 }
 394
 395 void Entry::adjust_edit_position_for_change(unsigned pos, int change)
 396 {
 397         unsigned old_edit_pos = edit_pos;
 398         unsigned old_select_pos = selection_pos;
 399
 400         if(change>0)
 401         {
 402                 if(edit_pos>=pos)
 403                         edit_pos += change;
 404                 if(selection_active && selection_pos>=pos)
 405                         selection_pos += change;
 406         }
 407         else if(change<0)
 408         {
 409                 if(edit_pos>=pos)
 410                         edit_pos -= min<unsigned>(edit_pos-pos, -change);
 411                 if(selection_active && selection_pos>=pos)
 412                         selection_pos -= min<unsigned>(selection_pos-pos, -change);
 413         }
 414
 415         if(edit_pos!=old_edit_pos)
 416                 signal_edit_position_changed.emit(edit_pos);
 417         if(selection_active && (edit_pos!=old_edit_pos || selection_pos!=old_select_pos))
 418         {
 419                 unsigned start, end;
 420                 if(get_selection(start, end))
 421                         signal_selection_changed.emit(start, end);
 422         }
 423 }
 424
 425 void Entry::set_edit_position(unsigned ep, bool select)
 426 {
 427         bool selection_was_active = selection_active;
 428         if(select && !selection_active)
 429                 selection_pos = edit_pos;
 430         selection_active = select;
 431
 432         unsigned old_edit_pos = edit_pos;
 433         edit_pos = min(ep, text.size());
 434
 435         if(edit_pos!=old_edit_pos)
 436         {
 437                 signal_edit_position_changed.emit(edit_pos);
 438                 unsigned start, end;
 439                 if(get_selection(start, end))
 440                         signal_selection_changed.emit(start, end);
 441                 else if(selection_was_active)
 442                         signal_selection_changed.emit(edit_pos, edit_pos);
 443         }
 444
 445         if(multiline)
 446                 check_view_range();
 447         mark_rebuild();
 448 }
 449
 450 void Entry::erase_selection(bool emit_change)
 451 {
 452         unsigned start, end;
 453         if(!get_selection(start, end))
 454                 return;
 455
 456         text.erase(start, end-start);
 457         if(emit_change)
 458                 signal_text_changed.emit(text.get());
 459         set_edit_position(start, false);
 460 }
 461
 462 void Entry::check_cursor_blink()
 463 {
 464         const Part *cursor_part = style->get_part("cursor");
 465         bool has_blink = (cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS));
 466
 467         cursor_blink = (state&FOCUS);
 468         if((state&FOCUS) && style && has_blink)
 469         {
 470                 set_animation_interval(Time::sec/2);
 471                 mark_rebuild();
 472         }
 473         else
 474         {
 475                 if(has_blink)
 476                         mark_rebuild();
 477                 stop_animation();
 478         }
 479 }
 480
 481 void Entry::check_view_range()
 482 {
 483         if(!multiline || !text_part)
 484                 return;
 485
 486         visible_rows = text.get_visible_lines(*text_part, geom, 0);
 487
 488         unsigned row, col;
 489         text.offset_to_coords(edit_pos, row, col);
 490
 491         unsigned old_first_row = first_row;
 492         if(first_row>row)
 493                 first_row = row;
 494         else if(row>=first_row+visible_rows)
 495                 first_row = row+1-visible_rows;
 496
 497         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 498         if(first_row>scroll)
 499                 first_row = scroll;
 500
 501         if(first_row!=old_first_row)
 502                 signal_scroll_position_changed.emit(first_row);
 503
 504         slider->set_range(0, scroll);
 505         slider->set_page_size(visible_rows);
 506         slider->set_value(scroll-first_row);
 507 }
 508
 509 void Entry::slider_value_changed(double value)
 510 {
 511         if(text.get_n_lines()>visible_rows)
 512         {
 513                 unsigned old_first_row = first_row;
 514                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 515                 if(first_row!=old_first_row)
 516                         signal_scroll_position_changed.emit(first_row);
 517                 mark_rebuild();
 518         }
 519 }
 520
 521
 522 Entry::Loader::Loader(Entry &e):
 523         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 524 {
 525         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 526         add("multiline", &Loader::multiline);
 527 }
 528
 529 void Entry::Loader::multiline(bool m)
 530 {
 531         obj.set_multiline(m);
 532 }
 533
 534 } // namespace GLtk
 535 } // namespace Msp