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("Regular", 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("Regular", 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         m_listbox->entryReset(false);
 250 }
 251
 252 //////////////////////////////////////
 253
 254 DEFINE_REF(eListboxPythonStringContent);
 255
 256 eListboxPythonStringContent::eListboxPythonStringContent()
 257 {
 258         m_list = 0;
 259 }
 260
 261 eListboxPythonStringContent::~eListboxPythonStringContent()
 262 {
 263 }
 264
 265 void eListboxPythonStringContent::cursorHome()
 266 {
 267         m_cursor = 0;
 268 }
 269
 270 void eListboxPythonStringContent::cursorEnd()
 271 {
 272         m_cursor = size();
 273 }
 274
 275 int eListboxPythonStringContent::cursorMove(int count)
 276 {
 277         m_cursor += count;
 278
 279         if (m_cursor < 0)
 280                 cursorHome();
 281         else if (m_cursor > size())
 282                 cursorEnd();
 283         return 0;
 284 }
 285
 286 int eListboxPythonStringContent::cursorValid()
 287 {
 288         return m_cursor < size();
 289 }
 290
 291 int eListboxPythonStringContent::cursorSet(int n)
 292 {
 293         m_cursor = n;
 294
 295         if (m_cursor < 0)
 296                 cursorHome();
 297         else if (m_cursor > size())
 298                 cursorEnd();
 299         return 0;
 300 }
 301
 302 int eListboxPythonStringContent::cursorGet()
 303 {
 304         return m_cursor;
 305 }
 306
 307 void eListboxPythonStringContent::cursorSave()
 308 {
 309         m_saved_cursor = m_cursor;
 310 }
 311
 312 void eListboxPythonStringContent::cursorRestore()
 313 {
 314         m_cursor = m_saved_cursor;
 315 }
 316
 317 int eListboxPythonStringContent::size()
 318 {
 319         if (!m_list)
 320                 return 0;
 321         return PyList_Size(m_list);
 322 }
 323
 324 void eListboxPythonStringContent::setSize(const eSize &size)
 325 {
 326         m_itemsize = size;
 327 }
 328
 329 void eListboxPythonStringContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 330 {
 331         ePtr<gFont> fnt = new gFont("Regular", 20);
 332         painter.clip(eRect(offset, m_itemsize));
 333         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 334         painter.clear();
 335
 336         if (m_list && cursorValid())
 337         {
 338                 PyObject *item = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 339                 painter.setFont(fnt);
 340
 341                         /* the user can supply tuples, in this case the first one will be displayed. */
 342                 if (PyTuple_Check(item))
 343                         item = PyTuple_GetItem(item, 0);
 344
 345                 const char *string = PyString_Check(item) ? PyString_AsString(item) : "<not-a-string>";
 346
 347                 ePoint text_offset = offset + (selected ? ePoint(2, 2) : ePoint(1, 1));
 348
 349                 painter.renderText(eRect(text_offset, m_itemsize), string);
 350
 351                 if (selected)
 352                         style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 353         }
 354
 355         painter.clippop();
 356 }
 357
 358 void eListboxPythonStringContent::setList(PyObject *list)
 359 {
 360         Py_XDECREF(m_list);
 361         if (!PyList_Check(list))
 362         {
 363                 m_list = 0;
 364         } else
 365         {
 366                 m_list = list;
 367                 Py_INCREF(m_list);
 368         }
 369
 370         if (m_listbox)
 371                 m_listbox->entryReset(false);
 372 }
 373
 374 PyObject *eListboxPythonStringContent::getCurrentSelection()
 375 {
 376         if (!m_list)
 377                 return 0;
 378         if (!cursorValid())
 379                 return 0;
 380         PyObject *r = PyList_GetItem(m_list, m_cursor);
 381         Py_XINCREF(r);
 382         return r;
 383 }
 384
 385 void eListboxPythonStringContent::invalidateEntry(int index)
 386 {
 387         if (m_listbox)
 388                 m_listbox->entryChanged(index);
 389 }
 390
 391 void eListboxPythonStringContent::invalidate()
 392 {
 393         if (m_listbox)
 394                 m_listbox->invalidate();
 395 }
 396
 397 //////////////////////////////////////
 398
 399 void eListboxPythonConfigContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 400 {
 401         ePtr<gFont> fnt = new gFont("Regular", 20);
 402         ePtr<gFont> fnt2 = new gFont("Regular", 16);
 403         painter.clip(eRect(offset, m_itemsize));
 404         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 405         painter.clear();
 406
 407         if (m_list && cursorValid())
 408         {
 409                         /* get current list item */
 410                 PyObject *item = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 411                 PyObject *text = 0, *value = 0;
 412                 painter.setFont(fnt);
 413
 414                         /* the first tuple element is a string for the left side.
 415                            the second one will be called, and the result shall be an tuple.
 416
 417                            of this tuple,
 418                            the first one is the type (string).
 419                            the second one is the value. */
 420                 if (PyTuple_Check(item))
 421                 {
 422                                 /* handle left part. get item from tuple, convert to string, display. */
 423
 424                         text = PyTuple_GetItem(item, 0);
 425                         text = PyObject_Str(text); /* creates a new object - old object was borrowed! */
 426                         const char *string = (text && PyString_Check(text)) ? PyString_AsString(text) : "<not-a-string>";
 427                         eSize item_left = eSize(m_seperation, m_itemsize.height());
 428                         eSize item_right = eSize(m_itemsize.width() - m_seperation, m_itemsize.height());
 429                         painter.renderText(eRect(offset, item_left), string, gPainter::RT_HALIGN_LEFT);
 430                         Py_XDECREF(text);
 431
 432                                 /* now, handle the value. get 2nd part from tuple*/
 433                         value = PyTuple_GetItem(item, 1);
 434                         if (value)
 435                         {
 436                                 PyObject *args = PyTuple_New(1);
 437                                 PyTuple_SetItem(args, 0, PyInt_FromLong(selected));
 438
 439                                         /* CallObject will call __call__ which should return the value tuple */
 440                                 value = PyObject_CallObject(value, args);
 441
 442                                 if (PyErr_Occurred())
 443                                         PyErr_Print();
 444
 445                                 Py_DECREF(args);
 446                                         /* the PyInt was stolen. */
 447                         }
 448
 449                                 /*  check if this is really a tuple */
 450                         if (value && PyTuple_Check(value))
 451                         {
 452                                         /* convert type to string */
 453                                 PyObject *type = PyTuple_GetItem(value, 0);
 454                                 const char *atype = (type && PyString_Check(type)) ? PyString_AsString(type) : 0;
 455
 456                                 if (atype)
 457                                 {
 458                                         if (!strcmp(atype, "text"))
 459                                         {
 460                                                 PyObject *pvalue = PyTuple_GetItem(value, 1);
 461                                                 const char *value = (pvalue && PyString_Check(pvalue)) ? PyString_AsString(pvalue) : "<not-a-string>";
 462                                                 painter.setFont(fnt2);
 463                                                 painter.renderText(eRect(offset + eSize(m_seperation, 0), item_right), value, gPainter::RT_HALIGN_RIGHT);
 464
 465                                                         /* pvalue is borrowed */
 466                                         } else if (!strcmp(atype, "slider"))
 467                                         {
 468                                                 PyObject *pvalue = PyTuple_GetItem(value, 1);
 469
 470                                                         /* convert value to Long. fallback to -1 on error. */
 471                                                 int value = (pvalue && PyInt_Check(pvalue)) ? PyInt_AsLong(pvalue) : -1;
 472
 473                                                         /* calc. slider length */
 474                                                 int width = item_right.width() * value / 100;
 475                                                 int height = item_right.height();
 476
 477
 478                                                         /* draw slider */
 479                                                 //painter.fill(eRect(offset.x() + m_seperation, offset.y(), width, height));
 480                                                 //hack - make it customizable
 481                                                 painter.fill(eRect(offset.x() + m_seperation, offset.y() + 5, width, height-10));
 482
 483                                                         /* pvalue is borrowed */
 484                                         } else if (!strcmp(atype, "mtext"))
 485                                         {
 486                                                 PyObject *pvalue = PyTuple_GetItem(value, 1);
 487                                                 const char *text = (pvalue && PyString_Check(pvalue)) ? PyString_AsString(pvalue) : "<not-a-string>";
 488
 489                                                 ePtr<eTextPara> para = new eTextPara(eRect(offset + eSize(m_seperation, 0), item_right));
 490                                                 para->setFont(fnt2);
 491                                                 para->renderString(text, 0);
 492                                                 para->realign(eTextPara::dirRight);
 493                                                 int glyphs = para->size();
 494
 495                                                 PyObject *plist = 0;
 496
 497                                                 if (PyTuple_Size(value) >= 3)
 498                                                         plist = PyTuple_GetItem(value, 2);
 499
 500                                                 int entries = 0;
 501
 502                                                 if (plist && PyList_Check(plist))
 503                                                         entries = PyList_Size(plist);
 504
 505                                                 for (int i = 0; i < entries; ++i)
 506                                                 {
 507                                                         PyObject *entry = PyList_GetItem(plist, i);
 508                                                         int num = PyInt_Check(entry) ? PyInt_AsLong(entry) : -1;
 509
 510                                                         if ((num < 0) || (num >= glyphs))
 511                                                                 eWarning("glyph index %d in PythonConfigList out of bounds!");
 512                                                         else
 513                                                         {
 514                                                                 para->setGlyphFlag(num, GS_INVERT);
 515                                                                 eRect bbox;
 516                                                                 bbox = para->getGlyphBBox(num);
 517                                                                 bbox = eRect(bbox.left(), offset.y(), bbox.width(), m_itemsize.height());
 518                                                                 painter.fill(bbox);
 519                                                         }
 520                                                                 /* entry is borrowed */
 521                                                 }
 522
 523                                                 painter.renderPara(para, ePoint(0, 0));
 524                                                         /* pvalue is borrowed */
 525                                                         /* plist is 0 or borrowed */
 526                                         }
 527                                 }
 528                                         /* type is borrowed */
 529                         } else
 530                                 eWarning("eListboxPythonConfigContent: second value of tuple is not a tuple.");
 531                                 /* value is borrowed */
 532                 }
 533
 534                 if (selected)
 535                         style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 536         }
 537
 538         painter.clippop();
 539 }
 540
 541 //////////////////////////////////////
 542
 543         /* todo: make a real infrastructure here! */
 544 RESULT SwigFromPython(ePtr<gPixmap> &res, PyObject *obj);
 545
 546 void eListboxPythonMultiContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 547 {
 548         painter.clip(eRect(offset, m_itemsize));
 549         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 550         painter.clear();
 551
 552         if (m_list && cursorValid())
 553         {
 554                 PyObject *items = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 555
 556                 if (!items)
 557                 {
 558                         eDebug("eListboxPythonMultiContent: error getting item %d", m_cursor);
 559                         painter.clippop();
 560                         return;
 561                 }
 562
 563                 if (!PyList_Check(items))
 564                 {
 565                         eDebug("eListboxPythonMultiContent: list entry %d is not a list", m_cursor);
 566                         painter.clippop();
 567                         return;
 568                 }
 569
 570                 int size = PyList_Size(items);
 571                 for (int i = 1; i < size; ++i)
 572                 {
 573                         PyObject *item = PyList_GetItem(items, i); // borrowed reference!
 574
 575                         if (!item)
 576                         {
 577                                 eDebug("eListboxPythonMultiContent: ?");
 578                                 painter.clippop();
 579                                 return;
 580                         }
 581
 582
 583                         PyObject *px = 0, *py = 0, *pwidth = 0, *pheight = 0, *pfnt = 0, *pstring = 0, *pflags = 0;
 584
 585                         /*
 586                                 we have a list of tuples:
 587
 588                                 (x, y, width, height, fnt, flags, "bla" ),
 589
 590                                 or, for a pixmap:
 591
 592                                 (x, y, width, height, pixmap )
 593
 594                          */
 595
 596                         if (!PyTuple_Check(item))
 597                         {
 598                                 eDebug("eListboxPythonMultiContent did not receive a tuple.");
 599                                 painter.clippop();
 600                                 return;
 601                         }
 602
 603                         int size = PyTuple_Size(item);
 604
 605                         if (size >= 5)
 606                         {
 607                                 px = PyTuple_GetItem(item, 0);
 608                                 py = PyTuple_GetItem(item, 1);
 609                                 pwidth = PyTuple_GetItem(item, 2);
 610                                 pheight = PyTuple_GetItem(item, 3);
 611
 612                                 pfnt = PyTuple_GetItem(item, 4); /* could also be an pixmap */
 613                                 if (size >= 7)
 614                                 {
 615                                         pflags = PyTuple_GetItem(item, 5);
 616                                         pstring = PyTuple_GetItem(item, 6);
 617                                 }
 618                         }
 619
 620                         ePtr<gPixmap> pixmap;
 621
 622                                 /* decide what type */
 623                         int type = -1;
 624                         if (pfnt)
 625                         {
 626                                 if (PyNumber_Check(pfnt)) /* font index */
 627                                         type = 0;
 628                                 else if (!SwigFromPython(pixmap, pfnt))
 629                                         type = 1;
 630                         }
 631
 632                         switch (type)
 633                         {
 634                         case 0: // text
 635                         {
 636                                 if (!(px && py && pwidth && pheight && pfnt && pstring))
 637                                 {
 638                                         eDebug("eListboxPythonMultiContent received too small tuple (must be (x, y, width, height, fnt, flags, string[, ...])");
 639                                         painter.clippop();
 640                                         return;
 641                                 }
 642
 643                                 pstring = PyObject_Str(pstring);
 644
 645                                 const char *string = (PyString_Check(pstring)) ? PyString_AsString(pstring) : "<not-a-string>";
 646
 647                                 int x = PyInt_AsLong(px);
 648                                 int y = PyInt_AsLong(py);
 649                                 int width = PyInt_AsLong(pwidth);
 650                                 int height = PyInt_AsLong(pheight);
 651                                 int flags = PyInt_AsLong(pflags);
 652
 653                                 int fnt = PyInt_AsLong(pfnt);
 654
 655                                 if (m_font.find(fnt) == m_font.end())
 656                                 {
 657                                         eDebug("eListboxPythonMultiContent: specified font %d was not found!", fnt);
 658                                         Py_XDECREF(pstring);
 659                                         painter.clippop();
 660                                         return;
 661                                 }
 662                                 eRect r = eRect(x, y, width, height);
 663                                 r.moveBy(offset);
 664
 665                                 painter.setFont(m_font[fnt]);
 666
 667                                 painter.renderText(r, string, flags);
 668
 669                                 Py_XDECREF(pstring);
 670                                 break;
 671                         }
 672                         case 1: // pixmap
 673                         {
 674                                 int x = PyInt_AsLong(px);
 675                                 int y = PyInt_AsLong(py);
 676                                 int width = PyInt_AsLong(pwidth);
 677                                 int height = PyInt_AsLong(pheight);
 678
 679                                 eRect r = eRect(x, y, width, height);
 680                                 r.moveBy(offset);
 681
 682                                 painter.blit(pixmap, r.topLeft(), r);
 683                                 break;
 684                         }
 685                         default:
 686                                 eWarning("eListboxPythonMultiContent received neither text nor pixmap entry");
 687                                 painter.clippop();
 688                                 return;
 689                         }
 690                 }
 691         }
 692
 693         if (selected)
 694                 style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 695
 696         painter.clippop();
 697 }
 698
 699 void eListboxPythonMultiContent::setFont(int fnt, gFont *font)
 700 {
 701         if (font)
 702                 m_font[fnt] = font;
 703         else
 704                 m_font.erase(fnt);
 705 }