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