lib/gui/elistboxcontent.cpp

   1 #include <lib/gui/elistbox.h>
   2 #include <lib/gui/elistboxcontent.h>
   3 #include <lib/gdi/font.h>
   4 #include <Python.h>
   5
   6 /*
   7     The basic idea is to have an interface which gives all relevant list
   8     processing functions, and can be used by the listbox to browse trough
   9     the list.
  10
  11     The listbox directly uses the implemented cursor. It tries hard to avoid
  12     iterating trough the (possibly very large) list, so it should be O(1),
  13     i.e. the performance should not be influenced by the size of the list.
  14
  15     The list interface knows how to draw the current entry to a specified
  16     offset. Different interfaces can be used to adapt different lists,
  17     pre-filter lists on the fly etc.
  18
  19                 cursorSave/Restore is used to avoid re-iterating the list on redraw.
  20                 The current selection is always selected as cursor position, the
  21     cursor is then positioned to the start, and then iterated. This gives
  22     at most 2x m_items_per_page cursor movements per redraw, indepenent
  23     of the size of the list.
  24
  25     Although cursorSet is provided, it should be only used when there is no
  26     other way, as it involves iterating trough the list.
  27  */
  28
  29 iListboxContent::~iListboxContent()
  30 {
  31 }
  32
  33 iListboxContent::iListboxContent(): m_listbox(0)
  34 {
  35 }
  36
  37 void iListboxContent::setListbox(eListbox *lb)
  38 {
  39         m_listbox = lb;
  40 }
  41
  42 DEFINE_REF(eListboxTestContent);
  43
  44 void eListboxTestContent::cursorHome()
  45 {
  46         m_cursor = 0;
  47 }
  48
  49 void eListboxTestContent::cursorEnd()
  50 {
  51         m_cursor = size();
  52 }
  53
  54 int eListboxTestContent::cursorMove(int count)
  55 {
  56         m_cursor += count;
  57
  58         if (m_cursor < 0)
  59                 cursorHome();
  60         else if (m_cursor > size())
  61                 cursorEnd();
  62         return 0;
  63 }
  64
  65 int eListboxTestContent::cursorValid()
  66 {
  67         return m_cursor < size();
  68 }
  69
  70 int eListboxTestContent::cursorSet(int n)
  71 {
  72         m_cursor = n;
  73
  74         if (m_cursor < 0)
  75                 cursorHome();
  76         else if (m_cursor > size())
  77                 cursorEnd();
  78         return 0;
  79 }
  80
  81 int eListboxTestContent::cursorGet()
  82 {
  83         return m_cursor;
  84 }
  85
  86 void eListboxTestContent::cursorSave()
  87 {
  88         m_saved_cursor = m_cursor;
  89 }
  90
  91 void eListboxTestContent::cursorRestore()
  92 {
  93         m_cursor = m_saved_cursor;
  94 }
  95
  96 int eListboxTestContent::size()
  97 {
  98         return 10;
  99 }
 100
 101 RESULT eListboxTestContent::connectItemChanged(const Slot0<void> &itemChanged, ePtr<eConnection> &connection)
 102 {
 103         return 0;
 104 }
 105
 106 void eListboxTestContent::setSize(const eSize &size)
 107 {
 108         m_size = size;
 109 }
 110
 111 void eListboxTestContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 112 {
 113         ePtr<gFont> fnt = new gFont("Arial", 20);
 114         painter.clip(eRect(offset, m_size));
 115         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 116         painter.clear();
 117
 118         if (cursorValid())
 119         {
 120                 painter.setFont(fnt);
 121                 char string[10];
 122                 sprintf(string, "%d.)", m_cursor);
 123
 124                 ePoint text_offset = offset + (selected ? ePoint(2, 2) : ePoint(1, 1));
 125
 126                 painter.renderText(eRect(text_offset, m_size), string);
 127
 128                 if (selected)
 129                         style.drawFrame(painter, eRect(offset, m_size), eWindowStyle::frameListboxEntry);
 130         }
 131
 132         painter.clippop();
 133 }
 134
 135 //////////////////////////////////////
 136
 137 DEFINE_REF(eListboxStringContent);
 138
 139 eListboxStringContent::eListboxStringContent()
 140 {
 141         m_size = 0;
 142         cursorHome();
 143 }
 144
 145 void eListboxStringContent::cursorHome()
 146 {
 147         m_cursor = m_list.begin();
 148         m_cursor_number = 0;
 149 }
 150
 151 void eListboxStringContent::cursorEnd()
 152 {
 153         m_cursor = m_list.end();
 154         m_cursor_number = m_size;
 155 }
 156
 157 int eListboxStringContent::cursorMove(int count)
 158 {
 159         if (count > 0)
 160         {
 161                 while (count && (m_cursor != m_list.end()))
 162                 {
 163                         ++m_cursor;
 164                         ++m_cursor_number;
 165                         --count;
 166                 }
 167         } else if (count < 0)
 168         {
 169                 while (count && (m_cursor != m_list.begin()))
 170                 {
 171                         --m_cursor;
 172                         --m_cursor_number;
 173                         ++count;
 174                 }
 175         }
 176
 177         return 0;
 178 }
 179
 180 int eListboxStringContent::cursorValid()
 181 {
 182         return m_cursor != m_list.end();
 183 }
 184
 185 int eListboxStringContent::cursorSet(int n)
 186 {
 187         cursorHome();
 188         cursorMove(n);
 189
 190         return 0;
 191 }
 192
 193 int eListboxStringContent::cursorGet()
 194 {
 195         return m_cursor_number;
 196 }
 197
 198 void eListboxStringContent::cursorSave()
 199 {
 200         m_saved_cursor = m_cursor;
 201         m_saved_cursor_number = m_cursor_number;
 202 }
 203
 204 void eListboxStringContent::cursorRestore()
 205 {
 206         m_cursor = m_saved_cursor;
 207         m_cursor_number = m_saved_cursor_number;
 208 }
 209
 210 int eListboxStringContent::size()
 211 {
 212         return m_size;
 213 }
 214
 215 void eListboxStringContent::setSize(const eSize &size)
 216 {
 217         m_itemsize = size;
 218 }
 219
 220 void eListboxStringContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 221 {
 222         ePtr<gFont> fnt = new gFont("Arial", 20);
 223         painter.clip(eRect(offset, m_itemsize));
 224         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 225         painter.clear();
 226
 227         eDebug("item %d", m_cursor_number);
 228         if (cursorValid())
 229         {
 230                 eDebug("is valid..");
 231                 painter.setFont(fnt);
 232
 233                 ePoint text_offset = offset + (selected ? ePoint(2, 2) : ePoint(1, 1));
 234
 235                 painter.renderText(eRect(text_offset, m_itemsize), *m_cursor);
 236
 237                 if (selected)
 238                         style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 239         }
 240
 241         painter.clippop();
 242 }
 243
 244 void eListboxStringContent::setList(std::list<std::string> &list)
 245 {
 246         m_list = list;
 247         m_size = list.size();
 248         cursorHome();
 249 }
 250
 251 //////////////////////////////////////
 252
 253 DEFINE_REF(eListboxPythonStringContent);
 254
 255 eListboxPythonStringContent::eListboxPythonStringContent()
 256 {
 257         m_list = 0;
 258 }
 259
 260 eListboxPythonStringContent::~eListboxPythonStringContent()
 261 {
 262 }
 263
 264 void eListboxPythonStringContent::cursorHome()
 265 {
 266         m_cursor = 0;
 267 }
 268
 269 void eListboxPythonStringContent::cursorEnd()
 270 {
 271         m_cursor = size();
 272 }
 273
 274 int eListboxPythonStringContent::cursorMove(int count)
 275 {
 276         m_cursor += count;
 277
 278         if (m_cursor < 0)
 279                 cursorHome();
 280         else if (m_cursor > size())
 281                 cursorEnd();
 282         return 0;
 283 }
 284
 285 int eListboxPythonStringContent::cursorValid()
 286 {
 287         return m_cursor < size();
 288 }
 289
 290 int eListboxPythonStringContent::cursorSet(int n)
 291 {
 292         m_cursor = n;
 293
 294         if (m_cursor < 0)
 295                 cursorHome();
 296         else if (m_cursor > size())
 297                 cursorEnd();
 298         return 0;
 299 }
 300
 301 int eListboxPythonStringContent::cursorGet()
 302 {
 303         return m_cursor;
 304 }
 305
 306 void eListboxPythonStringContent::cursorSave()
 307 {
 308         m_saved_cursor = m_cursor;
 309 }
 310
 311 void eListboxPythonStringContent::cursorRestore()
 312 {
 313         m_cursor = m_saved_cursor;
 314 }
 315
 316 int eListboxPythonStringContent::size()
 317 {
 318         if (!m_list)
 319                 return 0;
 320         return PyList_Size(m_list);
 321 }
 322
 323 void eListboxPythonStringContent::setSize(const eSize &size)
 324 {
 325         m_itemsize = size;
 326 }
 327
 328 void eListboxPythonStringContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 329 {
 330         ePtr<gFont> fnt = new gFont("Arial", 20);
 331         painter.clip(eRect(offset, m_itemsize));
 332         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 333         painter.clear();
 334
 335         if (m_list && cursorValid())
 336         {
 337                 PyObject *item = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 338                 painter.setFont(fnt);
 339
 340                         /* the user can supply tuples, in this case the first one will be displayed. */
 341                 if (PyTuple_Check(item))
 342                         item = PyTuple_GetItem(item, 0);
 343
 344                 const char *string = PyString_Check(item) ? PyString_AsString(item) : "<not-a-string>";
 345
 346                 ePoint text_offset = offset + (selected ? ePoint(2, 2) : ePoint(1, 1));
 347
 348                 painter.renderText(eRect(text_offset, m_itemsize), string);
 349
 350                 if (selected)
 351                         style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 352         }
 353
 354         painter.clippop();
 355 }
 356
 357 void eListboxPythonStringContent::setList(PyObject *list)
 358 {
 359         Py_XDECREF(m_list);
 360         if (!PyList_Check(list))
 361         {
 362                 m_list = 0;
 363         } else
 364         {
 365                 m_list = list;
 366                 Py_INCREF(m_list);
 367         }
 368 }
 369
 370 PyObject *eListboxPythonStringContent::getCurrentSelection()
 371 {
 372         if (!m_list)
 373                 return 0;
 374         if (!cursorValid())
 375                 return 0;
 376         PyObject *r = PyList_GetItem(m_list, m_cursor);
 377         Py_XINCREF(r);
 378         return r;
 379 }
 380
 381 void eListboxPythonStringContent::invalidateEntry(int index)
 382 {
 383         if (m_listbox)
 384                 m_listbox->entryChanged(index);
 385 }
 386
 387 //////////////////////////////////////
 388
 389 void eListboxPythonConfigContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 390 {
 391         ePtr<gFont> fnt = new gFont("Arial", 20);
 392         ePtr<gFont> fnt2 = new gFont("Arial", 16);
 393         painter.clip(eRect(offset, m_itemsize));
 394         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 395         painter.clear();
 396
 397         if (m_list && cursorValid())
 398         {
 399                         /* get current list item */
 400                 PyObject *item = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 401                 PyObject *text = 0, *value = 0;
 402                 painter.setFont(fnt);
 403
 404                         /* the first tuple element is a string for the left side.
 405                            the second one will be called, and the result shall be an tuple.
 406
 407                            of this tuple,
 408                            the first one is the type (string).
 409                            the second one is the value. */
 410                 if (PyTuple_Check(item))
 411                 {
 412                                 /* handle left part. get item from tuple, convert to string, display. */
 413
 414                         text = PyTuple_GetItem(item, 0);
 415                         text = PyObject_Str(text);
 416                         const char *string = (text && PyString_Check(text)) ? PyString_AsString(text) : "<not-a-string>";
 417                         eSize item_left = eSize(m_seperation, m_itemsize.height());
 418                         eSize item_right = eSize(m_itemsize.width() - m_seperation, m_itemsize.height());
 419                         painter.renderText(eRect(offset, item_left), string, gPainter::RT_HALIGN_LEFT);
 420                         Py_XDECREF(text);
 421
 422                                 /* now, handle the value. get 2nd part from tuple*/
 423                         value = PyTuple_GetItem(item, 1);
 424                         if (value)
 425                         {
 426                                 PyObject *args = PyTuple_New(1);
 427                                 PyTuple_SetItem(args, 0, PyInt_FromLong(selected));
 428
 429                                         /* CallObject will call __call__ which should return the value tuple */
 430                                 value = PyObject_CallObject(value, args);
 431
 432                                 if (PyErr_Occurred())
 433                                         PyErr_Print();
 434
 435                                 Py_DECREF(args);
 436                                         /* the PyInt was stolen. */
 437                         }
 438
 439                                 /*  check if this is really a tuple */
 440                         if (value && PyTuple_Check(value))
 441                         {
 442                                         /* convert type to string */
 443                                 PyObject *type = PyTuple_GetItem(value, 0);
 444                                 const char *atype = (type && PyString_Check(type)) ? PyString_AsString(type) : 0;
 445
 446                                 if (atype)
 447                                 {
 448                                         if (!strcmp(atype, "text"))
 449                                         {
 450                                                 PyObject *pvalue = PyTuple_GetItem(value, 1);
 451                                                 const char *value = (pvalue && PyString_Check(pvalue)) ? PyString_AsString(pvalue) : "<not-a-string>";
 452                                                 painter.setFont(fnt2);
 453                                                 painter.renderText(eRect(offset + eSize(m_seperation, 0), item_right), value, gPainter::RT_HALIGN_RIGHT);
 454
 455                                                         /* pvalue is borrowed */
 456                                         } else if (!strcmp(atype, "slider"))
 457                                         {
 458                                                 PyObject *pvalue = PyTuple_GetItem(value, 1);
 459
 460                                                         /* convert value to Long. fallback to -1 on error. */
 461                                                 int value = (pvalue && PyInt_Check(pvalue)) ? PyInt_AsLong(pvalue) : -1;
 462
 463                                                         /* calc. slider length */
 464                                                 int width = item_right.width() * value / 100;
 465                                                 int height = item_right.height();
 466
 467
 468                                                         /* draw slider */
 469                                                 //painter.fill(eRect(offset.x() + m_seperation, offset.y(), width, height));
 470                                                 //hack - make it customizable
 471                                                 painter.fill(eRect(offset.x() + m_seperation, offset.y() + 5, width, height-10));
 472
 473                                                         /* pvalue is borrowed */
 474                                         } else if (!strcmp(atype, "mtext"))
 475                                         {
 476                                                 PyObject *pvalue = PyTuple_GetItem(value, 1);
 477                                                 const char *text = (pvalue && PyString_Check(pvalue)) ? PyString_AsString(pvalue) : "<not-a-string>";
 478
 479                                                 ePtr<eTextPara> para = new eTextPara(eRect(offset + eSize(m_seperation, 0), item_right));
 480                                                 para->setFont(fnt2);
 481                                                 para->renderString(text, 0);
 482                                                 para->realign(eTextPara::dirRight);
 483                                                 int glyphs = para->size();
 484
 485                                                 PyObject *plist = 0;
 486
 487                                                 if (PyTuple_Size(value) >= 3)
 488                                                         plist = PyTuple_GetItem(value, 2);
 489
 490                                                 int entries = 0;
 491
 492                                                 if (plist && PyList_Check(plist))
 493                                                         entries = PyList_Size(plist);
 494
 495                                                 for (int i = 0; i < entries; ++i)
 496                                                 {
 497                                                         PyObject *entry = PyList_GetItem(plist, i);
 498                                                         int num = PyInt_Check(entry) ? PyInt_AsLong(entry) : -1;
 499
 500                                                         if ((num < 0) || (num >= glyphs))
 501                                                                 eWarning("glyph index %d in PythonConfigList out of bounds!");
 502                                                         else
 503                                                         {
 504                                                                 para->setGlyphFlag(num, GS_INVERT);
 505                                                                 eRect bbox;
 506                                                                 bbox = para->getGlyphBBox(num);
 507                                                                 bbox = eRect(bbox.left(), offset.y(), bbox.width(), m_itemsize.height());
 508                                                                 painter.fill(bbox);
 509                                                         }
 510                                                                 /* entry is borrowed */
 511                                                 }
 512
 513                                                 painter.renderPara(para, ePoint(0, 0));
 514                                                         /* pvalue is borrowed */
 515                                                         /* plist is 0 or borrowed */
 516                                         }
 517                                 }
 518                                 Py_XDECREF(type);
 519                         } else
 520                                 eWarning("eListboxPythonConfigContent: second value of tuple is not a tuple.");
 521                                 /* value is borrowed */
 522                 }
 523
 524                 if (selected)
 525                         style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 526         }
 527
 528         painter.clippop();
 529 }
 530
 531 //////////////////////////////////////
 532
 533 void eListboxPythonMultiContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 534 {
 535         painter.clip(eRect(offset, m_itemsize));
 536         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 537         painter.clear();
 538
 539         if (m_list && cursorValid())
 540         {
 541                 PyObject *items = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 542
 543                 if (!items)
 544                 {
 545                         eDebug("eListboxPythonMultiContent: error getting item %d", m_cursor);
 546                         painter.clippop();
 547                         return;
 548                 }
 549
 550                 if (!PyList_Check(items))
 551                 {
 552                         eDebug("eListboxPythonMultiContent: list entry %d is not a list", m_cursor);
 553                         painter.clippop();
 554                         return;
 555                 }
 556
 557                 int size = PyList_Size(items);
 558                 for (int i = 1; i < size; ++i)
 559                 {
 560                         PyObject *item = PyList_GetItem(items, i); // borrowed reference!
 561
 562                         if (!item)
 563                         {
 564                                 eDebug("eListboxPythonMultiContent: ?");
 565                                 painter.clippop();
 566                                 return;
 567                         }
 568
 569
 570                         PyObject *px, *py, *pwidth, *pheight, *pfnt, *pstring, *pflags;
 571
 572                         /*
 573                                 we have a list of tuples:
 574
 575                                 (x, y, width, height, fnt, flags, "bla" ),
 576
 577                          */
 578
 579                         if (!PyTuple_Check(item))
 580                         {
 581                                 eDebug("eListboxPythonMultiContent did not receive a tuple.");
 582                                 painter.clippop();
 583                                 return;
 584                         }
 585
 586                         px = PyTuple_GetItem(item, 0);
 587                         py = PyTuple_GetItem(item, 1);
 588                         pwidth = PyTuple_GetItem(item, 2);
 589                         pheight = PyTuple_GetItem(item, 3);
 590                         pfnt = PyTuple_GetItem(item, 4);
 591                         pflags = PyTuple_GetItem(item, 5);
 592                         pstring = PyTuple_GetItem(item, 6);
 593
 594                         if (!(px && py && pwidth && pheight && pfnt && pstring))
 595                         {
 596                                 eDebug("eListboxPythonMultiContent received too small tuple (must be (x, y, width, height, fnt, flags, string[, ...])");
 597                                 painter.clippop();
 598                                 return;
 599                         }
 600
 601                         pstring = PyObject_Str(pstring);
 602
 603                         const char *string = (PyString_Check(pstring)) ? PyString_AsString(pstring) : "<not-a-string>";
 604
 605                         int x = PyInt_AsLong(px);
 606                         int y = PyInt_AsLong(py);
 607                         int width = PyInt_AsLong(pwidth);
 608                         int height = PyInt_AsLong(pheight);
 609                         int flags = PyInt_AsLong(pflags);
 610
 611                         int fnt = PyInt_AsLong(pfnt);
 612
 613                         if (m_font.find(fnt) == m_font.end())
 614                         {
 615                                 eDebug("eListboxPythonMultiContent: specified font %d was not found!", fnt);
 616                                 Py_XDECREF(pstring);
 617                                 painter.clippop();
 618                                 return;
 619                         }
 620
 621                         eRect r = eRect(x, y, width, height);
 622                         r.moveBy(offset);
 623
 624                         painter.setFont(m_font[fnt]);
 625
 626                         painter.renderText(r, string, flags);
 627
 628                         Py_XDECREF(pstring);
 629
 630                         if (selected)
 631                                 style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 632                 }
 633         }
 634
 635         painter.clippop();
 636 }
 637
 638 void eListboxPythonMultiContent::setFont(int fnt, gFont *font)
 639 {
 640         if (font)
 641                 m_font[fnt] = font;
 642         else
 643                 m_font.erase(fnt);
 644 }