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