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_LEFT && mod==MOD_SHIFT)
 302                 move_edit_position(NAV_LEFT, true);
 303         else if(key==Input::KEY_RIGHT && mod==MOD_SHIFT)
 304                 move_edit_position(NAV_RIGHT, true);
 305         else if(key==Input::KEY_UP && mod==MOD_SHIFT && multiline)
 306                 move_edit_position(NAV_UP, true);
 307         else if(key==Input::KEY_DOWN && mod==MOD_SHIFT && multiline)
 308                 move_edit_position(NAV_DOWN, true);
 309         else
 310                 return false;
 311
 312         return true;
 313 }
 314
 315 bool Entry::character(wchar_t ch)
 316 {
 317         if(got_key_press && ch>=' ' && ch!=0x7F)
 318         {
 319                 if(selection_active)
 320                         erase_selection(false);
 321                 insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 322                 return true;
 323         }
 324
 325         return false;
 326 }
 327
 328 void Entry::focus_in()
 329 {
 330         cursor_blink = true;
 331         Widget::focus_in();
 332         check_cursor_blink();
 333 }
 334
 335 void Entry::focus_out()
 336 {
 337         Widget::focus_out();
 338         got_key_press = false;
 339         check_cursor_blink();
 340 }
 341
 342 bool Entry::navigate(Navigation nav)
 343 {
 344         if(nav==NAV_LEFT || nav==NAV_RIGHT || ((nav==NAV_DOWN || nav==NAV_UP) && multiline))
 345                 move_edit_position(nav, false);
 346         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 347                 signal_enter.emit();
 348         else
 349                 return false;
 350
 351         return true;
 352 }
 353
 354 void Entry::animate(const Time::TimeDelta &)
 355 {
 356         cursor_blink = !cursor_blink;
 357         rebuild();
 358 }
 359
 360 void Entry::on_geometry_change()
 361 {
 362         if(multiline)
 363                 check_view_range();
 364 }
 365
 366 void Entry::on_style_change()
 367 {
 368         text.set_style(style);
 369
 370         if(!style)
 371         {
 372                 text_part = 0;
 373                 return;
 374         }
 375
 376         text_part = style->get_part("text");
 377
 378         if(multiline)
 379                 check_view_range();
 380
 381         check_cursor_blink();
 382 }
 383
 384 void Entry::move_edit_position(Navigation nav, bool select)
 385 {
 386         if(nav==NAV_LEFT)
 387                 set_edit_position(text.move_offset(edit_pos, -1), select);
 388         else if(nav==NAV_RIGHT)
 389                 set_edit_position(text.move_offset(edit_pos, 1), select);
 390         else if(nav==NAV_DOWN)
 391         {
 392                 unsigned row, col;
 393                 text.offset_to_coords(edit_pos, row, col);
 394                 set_edit_position(text.coords_to_offset(row+1, col), select);
 395         }
 396         else if(nav==NAV_UP)
 397         {
 398                 unsigned row, col;
 399                 text.offset_to_coords(edit_pos, row, col);
 400                 set_edit_position((row>0 ? text.coords_to_offset(row-1, col) : 0), select);
 401         }
 402         else
 403                 throw invalid_argument("Entry::move_edit_position");
 404 }
 405
 406 void Entry::set_edit_position(unsigned ep, bool select)
 407 {
 408         if(select && !selection_active)
 409                 selection_pos = edit_pos;
 410         selection_active = select;
 411
 412         unsigned old_edit_pos = edit_pos;
 413         edit_pos = min(ep, text.size());
 414
 415         if(edit_pos!=old_edit_pos)
 416                 signal_edit_position_changed.emit(edit_pos);
 417
 418         if(multiline)
 419                 check_view_range();
 420         rebuild();
 421 }
 422
 423 void Entry::erase_selection(bool emit_change)
 424 {
 425         unsigned start, end;
 426         if(!get_selection(start, end))
 427                 return;
 428
 429         text.erase(start, end-start);
 430         if(emit_change)
 431                 signal_text_changed.emit(text.get());
 432         set_edit_position(start, false);
 433 }
 434
 435 void Entry::check_cursor_blink()
 436 {
 437         cursor_blink = (state&FOCUS);
 438         if((state&FOCUS) && style)
 439         {
 440                 const Part *cursor_part = style->get_part("cursor");
 441                 if(cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS))
 442                 {
 443                         set_animation_interval(Time::sec/2);
 444                         return;
 445                 }
 446         }
 447
 448         stop_animation();
 449 }
 450
 451 void Entry::check_view_range()
 452 {
 453         if(!multiline || !text_part)
 454                 return;
 455
 456         visible_rows = text.get_visible_lines(*text_part, geom, 0);
 457
 458         unsigned row, col;
 459         text.offset_to_coords(edit_pos, row, col);
 460
 461         unsigned old_first_row = first_row;
 462         if(first_row>row)
 463                 first_row = row;
 464         else if(row>=first_row+visible_rows)
 465                 first_row = row+1-visible_rows;
 466
 467         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 468         if(first_row>scroll)
 469                 first_row = scroll;
 470
 471         if(first_row!=old_first_row)
 472                 signal_scroll_position_changed.emit(first_row);
 473
 474         slider->set_range(0, scroll);
 475         slider->set_value(scroll-first_row);
 476 }
 477
 478 void Entry::slider_value_changed(double value)
 479 {
 480         if(text.get_n_lines()>visible_rows)
 481         {
 482                 unsigned old_first_row = first_row;
 483                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 484                 if(first_row!=old_first_row)
 485                         signal_scroll_position_changed.emit(first_row);
 486         }
 487 }
 488
 489
 490 Entry::Loader::Loader(Entry &e):
 491         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 492 {
 493         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 494         add("multiline", &Loader::multiline);
 495 }
 496
 497 void Entry::Loader::multiline(bool m)
 498 {
 499         obj.set_multiline(m);
 500 }
 501
 502 } // namespace GLtk
 503 } // namespace Msp