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