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 = selection_pos;
 169                 unsigned end = edit_pos;
 170                 if(start>end)
 171                         swap(start, end);
 172
 173                 unsigned row, col;
 174                 text.offset_to_coords(start, row, col);
 175                 unsigned end_row, end_col;
 176                 text.offset_to_coords(end, end_row, end_col);
 177
 178                 if(end_row<first_row || row>=first_row+visible_rows)
 179                         return;
 180
 181                 if(row<first_row)
 182                 {
 183                         row = first_row;
 184                         col = 0;
 185                 }
 186
 187                 if(end_row>=first_row+visible_rows)
 188                 {
 189                         end_row = first_row+visible_rows-1;
 190                         end_col = text.get_line_length(end_row);
 191                 }
 192
 193                 while(row<=end_row)
 194                 {
 195                         unsigned ec = (row==end_row ? end_col : text.get_line_length(row));
 196                         if(ec>col)
 197                         {
 198                                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 199                                 Geometry egeom = text.coords_to_geometry(*text_part, geom, first_row, row, ec);
 200
 201                                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 202                                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 203                                 graphic->build(egeom.x-rgeom.x, part.get_geometry().h, bld);
 204                         }
 205
 206                         ++row;
 207                         col = 0;
 208                 }
 209         }
 210         else if(part.get_name()=="slider")
 211         {
 212                 if(multiline)
 213                 {
 214                         reposition_child(*slider, part);
 215                         Widget::rebuild_special(part);
 216                 }
 217         }
 218         else
 219                 Widget::rebuild_special(part);
 220 }
 221
 222 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 223 {
 224         if(part.get_name()=="slider" && multiline)
 225                 slider->render(renderer);
 226 }
 227
 228 void Entry::touch_press(int x, int y, unsigned finger)
 229 {
 230         if(finger==0)
 231                 set_focus();
 232         Widget::touch_press(x, y, finger);
 233 }
 234
 235 bool Entry::key_press(unsigned key, unsigned mod)
 236 {
 237         got_key_press = true;
 238         if(key==Input::KEY_BACKSPACE)
 239         {
 240                 if(selection_active)
 241                         erase_selection();
 242                 else if(edit_pos>0)
 243                         erase(edit_pos-1, 1);
 244         }
 245         else if(key==Input::KEY_DELETE)
 246         {
 247                 if(selection_active)
 248                         erase_selection();
 249                 else
 250                         erase(edit_pos, 1);
 251         }
 252         else if(key==Input::KEY_ENTER && multiline)
 253                 insert(edit_pos, "\n");
 254         else if(key==Input::KEY_END)
 255         {
 256                 unsigned row, col;
 257                 text.offset_to_coords(edit_pos, row, col);
 258                 set_edit_position(text.coords_to_offset(row, text.get_line_length(row)), mod==MOD_SHIFT);
 259         }
 260         else if(key==Input::KEY_HOME)
 261         {
 262                 unsigned row, col;
 263                 text.offset_to_coords(edit_pos, row, col);
 264                 set_edit_position(text.coords_to_offset(row, 0), mod==MOD_SHIFT);
 265         }
 266         else if(key==Input::KEY_LEFT && mod==MOD_SHIFT)
 267                 move_edit_position(NAV_LEFT, true);
 268         else if(key==Input::KEY_RIGHT && mod==MOD_SHIFT)
 269                 move_edit_position(NAV_RIGHT, true);
 270         else if(key==Input::KEY_UP && mod==MOD_SHIFT && multiline)
 271                 move_edit_position(NAV_UP, true);
 272         else if(key==Input::KEY_DOWN && mod==MOD_SHIFT && multiline)
 273                 move_edit_position(NAV_DOWN, true);
 274         else
 275                 return false;
 276
 277         return true;
 278 }
 279
 280 bool Entry::character(wchar_t ch)
 281 {
 282         if(got_key_press && ch>=' ' && ch!=0x7F)
 283         {
 284                 if(selection_active)
 285                         erase_selection();
 286                 insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 287                 return true;
 288         }
 289
 290         return false;
 291 }
 292
 293 void Entry::focus_in()
 294 {
 295         cursor_blink = true;
 296         Widget::focus_in();
 297         check_cursor_blink();
 298 }
 299
 300 void Entry::focus_out()
 301 {
 302         Widget::focus_out();
 303         got_key_press = false;
 304         check_cursor_blink();
 305 }
 306
 307 bool Entry::navigate(Navigation nav)
 308 {
 309         if(nav==NAV_LEFT || nav==NAV_RIGHT || ((nav==NAV_DOWN || nav==NAV_UP) && multiline))
 310                 move_edit_position(nav, false);
 311         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 312                 signal_enter.emit();
 313         else
 314                 return false;
 315
 316         return true;
 317 }
 318
 319 void Entry::animate(const Time::TimeDelta &)
 320 {
 321         cursor_blink = !cursor_blink;
 322         rebuild();
 323 }
 324
 325 void Entry::on_geometry_change()
 326 {
 327         if(multiline)
 328                 check_view_range();
 329 }
 330
 331 void Entry::on_style_change()
 332 {
 333         text.set_style(style);
 334
 335         if(!style)
 336         {
 337                 text_part = 0;
 338                 return;
 339         }
 340
 341         text_part = style->get_part("text");
 342
 343         if(multiline)
 344                 check_view_range();
 345
 346         check_cursor_blink();
 347 }
 348
 349 void Entry::move_edit_position(Navigation nav, bool select)
 350 {
 351         if(nav==NAV_LEFT)
 352         {
 353                 if(edit_pos>0)
 354                         set_edit_position(edit_pos-1, select);
 355         }
 356         else if(nav==NAV_RIGHT)
 357         {
 358                 if(edit_pos<text.size())
 359                         set_edit_position(edit_pos+1, select);
 360         }
 361         else if(nav==NAV_DOWN)
 362         {
 363                 unsigned row, col;
 364                 text.offset_to_coords(edit_pos, row, col);
 365                 set_edit_position(text.coords_to_offset(row+1, col), select);
 366         }
 367         else if(nav==NAV_UP)
 368         {
 369                 unsigned row, col;
 370                 text.offset_to_coords(edit_pos, row, col);
 371                 set_edit_position((row>0 ? text.coords_to_offset(row-1, col) : 0), select);
 372         }
 373 }
 374
 375 void Entry::set_edit_position(unsigned ep, bool select)
 376 {
 377         if(select && !selection_active)
 378                 selection_pos = edit_pos;
 379         selection_active = select;
 380
 381         edit_pos = min(ep, text.size());
 382         if(multiline)
 383                 check_view_range();
 384         rebuild();
 385 }
 386
 387 void Entry::erase_selection()
 388 {
 389         if(!selection_active)
 390                 return;
 391
 392         unsigned start = selection_pos;
 393         unsigned end = edit_pos;
 394         if(start>end)
 395                 swap(start, end);
 396
 397         text.erase(start, end-start);
 398         set_edit_position(start, false);
 399 }
 400
 401 void Entry::check_cursor_blink()
 402 {
 403         cursor_blink = (state&FOCUS);
 404         if((state&FOCUS) && style)
 405         {
 406                 const Part *cursor_part = style->get_part("cursor");
 407                 if(cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS))
 408                 {
 409                         set_animation_interval(Time::sec/2);
 410                         return;
 411                 }
 412         }
 413
 414         stop_animation();
 415 }
 416
 417 void Entry::check_view_range()
 418 {
 419         if(!multiline || !text_part)
 420                 return;
 421
 422         visible_rows = text.get_visible_lines(*text_part, geom, 0);
 423
 424         unsigned row, col;
 425         text.offset_to_coords(edit_pos, row, col);
 426
 427         if(first_row>row)
 428                 first_row = row;
 429         else if(row>=first_row+visible_rows)
 430                 first_row = row+1-visible_rows;
 431
 432         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 433         slider->set_range(0, scroll);
 434         slider->set_value(scroll-first_row);
 435 }
 436
 437 void Entry::slider_value_changed(double value)
 438 {
 439         if(text.get_n_lines()>visible_rows)
 440                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 441 }
 442
 443
 444 Entry::Loader::Loader(Entry &e):
 445         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 446 {
 447         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 448         add("multiline", &Loader::multiline);
 449 }
 450
 451 void Entry::Loader::multiline(bool m)
 452 {
 453         obj.set_multiline(m);
 454 }
 455
 456 } // namespace GLtk
 457 } // namespace Msp