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