code.vuplus.com Git - vuplus_dvbapp/blob - 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         //always invalidate when we get a new list
 370         if (m_listbox)
 371                 m_listbox->invalidate();
 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("Arial", 20);
 402         ePtr<gFont> fnt2 = new gFont("Arial", 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);
 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                                 Py_XDECREF(type);
 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 void eListboxPythonMultiContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
 544 {
 545         painter.clip(eRect(offset, m_itemsize));
 546         style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
 547         painter.clear();
 548
 549         if (m_list && cursorValid())
 550         {
 551                 PyObject *items = PyList_GetItem(m_list, m_cursor); // borrowed reference!
 552
 553                 if (!items)
 554                 {
 555                         eDebug("eListboxPythonMultiContent: error getting item %d", m_cursor);
 556                         painter.clippop();
 557                         return;
 558                 }
 559
 560                 if (!PyList_Check(items))
 561                 {
 562                         eDebug("eListboxPythonMultiContent: list entry %d is not a list", m_cursor);
 563                         painter.clippop();
 564                         return;
 565                 }
 566
 567                 int size = PyList_Size(items);
 568                 for (int i = 1; i < size; ++i)
 569                 {
 570                         PyObject *item = PyList_GetItem(items, i); // borrowed reference!
 571
 572                         if (!item)
 573                         {
 574                                 eDebug("eListboxPythonMultiContent: ?");
 575                                 painter.clippop();
 576                                 return;
 577                         }
 578
 579
 580                         PyObject *px, *py, *pwidth, *pheight, *pfnt, *pstring, *pflags;
 581
 582                         /*
 583                                 we have a list of tuples:
 584
 585                                 (x, y, width, height, fnt, flags, "bla" ),
 586
 587                          */
 588
 589                         if (!PyTuple_Check(item))
 590                         {
 591                                 eDebug("eListboxPythonMultiContent did not receive a tuple.");
 592                                 painter.clippop();
 593                                 return;
 594                         }
 595
 596                         px = PyTuple_GetItem(item, 0);
 597                         py = PyTuple_GetItem(item, 1);
 598                         pwidth = PyTuple_GetItem(item, 2);
 599                         pheight = PyTuple_GetItem(item, 3);
 600                         pfnt = PyTuple_GetItem(item, 4);
 601                         pflags = PyTuple_GetItem(item, 5);
 602                         pstring = PyTuple_GetItem(item, 6);
 603
 604                         if (!(px && py && pwidth && pheight && pfnt && pstring))
 605                         {
 606                                 eDebug("eListboxPythonMultiContent received too small tuple (must be (x, y, width, height, fnt, flags, string[, ...])");
 607                                 painter.clippop();
 608                                 return;
 609                         }
 610
 611                         pstring = PyObject_Str(pstring);
 612
 613                         const char *string = (PyString_Check(pstring)) ? PyString_AsString(pstring) : "<not-a-string>";
 614
 615                         int x = PyInt_AsLong(px);
 616                         int y = PyInt_AsLong(py);
 617                         int width = PyInt_AsLong(pwidth);
 618                         int height = PyInt_AsLong(pheight);
 619                         int flags = PyInt_AsLong(pflags);
 620
 621                         int fnt = PyInt_AsLong(pfnt);
 622
 623                         if (m_font.find(fnt) == m_font.end())
 624                         {
 625                                 eDebug("eListboxPythonMultiContent: specified font %d was not found!", fnt);
 626                                 Py_XDECREF(pstring);
 627                                 painter.clippop();
 628                                 return;
 629                         }
 630
 631                         eRect r = eRect(x, y, width, height);
 632                         r.moveBy(offset);
 633
 634                         painter.setFont(m_font[fnt]);
 635
 636                         painter.renderText(r, string, flags);
 637
 638                         Py_XDECREF(pstring);
 639
 640                         if (selected)
 641                                 style.drawFrame(painter, eRect(offset, m_itemsize), eWindowStyle::frameListboxEntry);
 642                 }
 643         }
 644
 645         painter.clippop();
 646 }
 647
 648 void eListboxPythonMultiContent::setFont(int fnt, gFont *font)
 649 {
 650         if (font)
 651                 m_font[fnt] = font;
 652         else
 653                 m_font.erase(fnt);
 654 }