kdbg/exprwnd.cpp

   1 // $Id$
   2
   3 // Copyright by Johannes Sixt
   4 // This file is under GPL, the GNU General Public Licence
   5
   6 #include "exprwnd.h"
   7 #include "exprwnd.moc"
   8 #include "typetable.h"
   9 #include <qstrlist.h>
  10 #include <qpainter.h>
  11 #include <qscrollbar.h>
  12 #include <kapp.h>
  13 #include <kiconloader.h>                /* icons */
  14 #ifdef HAVE_CONFIG_H
  15 #include "config.h"
  16 #endif
  17 #include "mydebug.h"
  18
  19 VarTree::VarTree(const QString& name, NameKind aKind) :
  20         KTreeViewItem(name),
  21         m_varKind(VKsimple),
  22         m_nameKind(aKind),
  23         m_valueChanged(false),
  24         m_type(0),
  25         m_exprIndex(0),
  26         m_exprIndexUseGuard(false)
  27 {
  28 }
  29
  30 VarTree::~VarTree()
  31 {
  32 }
  33
  34 void VarTree::paintValue(QPainter* p)
  35 {
  36     p->save();
  37     int cellHeight = height(p->fontMetrics());
  38     int textX = 2;
  39     int textY = (cellHeight - p->fontMetrics().height()) / 2 +
  40         p->fontMetrics().ascent();
  41
  42     if (m_valueChanged) {
  43         p->setPen(red);
  44     }
  45 //    p->setBackgroundColor(cg.base());
  46     p->drawText(textX, textY, m_value, m_value.length());
  47     p->restore();
  48 }
  49
  50 int VarTree::valueWidth()
  51 {
  52     assert(owner != 0);
  53     return owner->fontMetrics().width(m_value) + 4;
  54 }
  55
  56 QString VarTree::computeExpr() const
  57 {
  58     assert(getParent() != 0);
  59     // just to be sure
  60     if (getParent() == 0)
  61         return QString();
  62
  63     // top-level items are special
  64     if (getParent()->getParent() == 0)
  65         return getText();
  66
  67     // get parent expr
  68     VarTree* par = static_cast<VarTree*>(getParent());
  69     QString parentExpr = par->computeExpr();
  70
  71     /* don't add this item's name if this is a base class sub-item */
  72     if (m_nameKind == NKtype) {
  73         return parentExpr;
  74     }
  75     /* augment by this item's text */
  76     QString result;
  77     /* if this is an address, dereference it */
  78     if (m_nameKind == NKaddress) {
  79         ASSERT(par->m_varKind == VKpointer);
  80         result = "*" + parentExpr;
  81         return result;
  82     }
  83     switch (par->m_varKind) {
  84     case VKarray:
  85         {
  86             QString index = getText();
  87             int i = 1;
  88             // skip past the index
  89             while (index[i].isDigit())
  90                 i++;
  91             /*
  92              * Some array indices are actually ranges due to repeated array
  93              * values. We use the first index in these cases.
  94              */
  95             if (index[i] != ']') {
  96                 // remove second index
  97                 index.remove(i, index.length()-i-1);
  98             }
  99             result = "(" + parentExpr + ")" + index;
 100         }
 101         break;
 102     case VKstruct:
 103         result = "(" + parentExpr + ")." + getText();
 104         break;
 105     case VKsimple:                      /* parent can't be simple */
 106     case VKpointer:                     /* handled in NKaddress */
 107     case VKdummy:                       /* can't occur at all */
 108         ASSERT(false);
 109         result = parentExpr;            /* paranoia */
 110         break;
 111     }
 112     return result;
 113 }
 114
 115 bool VarTree::isToplevelExpr() const
 116 {
 117     return getParent() != 0 && getParent()->getParent() == 0;
 118 }
 119
 120 bool VarTree::isAncestorEq(const VarTree* child) const
 121 {
 122     const KTreeViewItem* c = child;
 123     while (c != 0 && c != this) {
 124         c = c->getParent();
 125     }
 126     return c != 0;
 127 }
 128
 129 bool VarTree::updateValue(const QString& newValue)
 130 {
 131     // check whether the value changed
 132     bool prevValueChanged = m_valueChanged;
 133     m_valueChanged = false;
 134     if (m_value != newValue) {
 135         m_value = newValue;
 136         m_valueChanged = true;
 137     }
 138     /*
 139      * We must repaint the cell if the value changed. If it did not change,
 140      * we still must repaint the cell if the value changed previously,
 141      * because the color of the display must be changed (from red to
 142      * black).
 143      */
 144     return m_valueChanged || prevValueChanged;
 145 }
 146
 147 void VarTree::inferTypesOfChildren(ProgramTypeTable& typeTable)
 148 {
 149     /*
 150      * Type inference works like this: We use type information of those
 151      * children that have a type name in their name (base classes) or in
 152      * their value (pointers)
 153      */
 154
 155     // first recurse children
 156     VarTree* child = static_cast<VarTree*>(getChild());
 157     while (child != 0) {
 158         child->inferTypesOfChildren(typeTable);
 159         child = static_cast<VarTree*>(child->getSibling());
 160     }
 161
 162     // if this is a pointer, get the type from the value (less the pointer)
 163     if (m_varKind == VKpointer) {
 164 #ifndef I_know_a_way_to_do_this_cleanly
 165         return;
 166 #else
 167         const char* p = m_value.data();
 168         const char* start = p;
 169         // the type of the pointer shows up in the value (sometimes)
 170         if (p == 0 || *p != '(')
 171             return;
 172         skipNested(p, '(', ')');
 173         /*
 174          * We only recognize pointers to data "(int *)" but not pointers
 175          * to functions "(void (*)())".
 176          */
 177         if (p-start < 3 &&              /* at least 3 chars necessary: (*) */
 178             p[-2] != '*')               /* skip back before the closing paren */
 179         {
 180             return;
 181         }
 182         const QString& typeName =
 183             QString::fromLatin1(start+1, p-start-3) // minus 3 chars
 184                 .stripWhiteSpace();
 185         m_type = typeTable.lookup(typeName);
 186         if (m_type == 0) {
 187             m_type = TypeInfo::unknownType();
 188         }
 189 #endif
 190     } else if (m_varKind == VKstruct) {
 191         // check if this is a base class part
 192         if (m_nameKind == NKtype) {
 193             const QString& typeName =
 194                 text.mid(1, text.length()-2); // strip < and >
 195             m_type = typeTable.lookup(typeName);
 196
 197             /* if we don't have a type yet, get it from the base class */
 198             if (m_type == 0) {
 199                 m_type = inferTypeFromBaseClass();
 200                 /*
 201                  * If there is a known type now, it is the one from the
 202                  * first base class whose type we know.
 203                  */
 204             }
 205
 206             /*
 207              * If we still don't have a type, the type is really unknown.
 208              */
 209             if (m_type == 0) {
 210                 m_type = TypeInfo::unknownType();
 211             }
 212         } // else
 213             /*
 214              * This is not a base class part. We don't assign a type so
 215              * that later we can ask gdb.
 216              */
 217     }
 218 }
 219
 220 /*
 221  * Get the type of the first base class whose type we know.
 222  */
 223 TypeInfo* VarTree::inferTypeFromBaseClass()
 224 {
 225     if (m_varKind == VKstruct) {
 226         VarTree* child = static_cast<VarTree*>(getChild());
 227         while (child != 0 &&
 228                // only check base class parts (i.e. type names)
 229                child->m_nameKind == NKtype)
 230         {
 231             if (child->m_type != 0 &&
 232                 child->m_type != TypeInfo::unknownType())
 233             {
 234                 // got a type!
 235                 return child->m_type;
 236             }
 237             child = static_cast<VarTree*>(child->getSibling());
 238         }
 239     }
 240     return 0;
 241 }
 242
 243
 244 ExprWnd::ExprWnd(QWidget* parent, const char* name) :
 245         KTreeView(parent, name),
 246         maxValueWidth(0),
 247         m_edit(this)
 248 {
 249     setNumCols(2);
 250
 251     connect(this, SIGNAL(expanded(int)), SLOT(slotExpandOrCollapse(int)));
 252     connect(this, SIGNAL(collapsed(int)), SLOT(slotExpandOrCollapse(int)));
 253
 254     m_pixPointer = UserIcon("pointer.xpm");
 255     if (m_pixPointer.isNull())
 256         TRACE("Can't load pointer.xpm");
 257 }
 258
 259 ExprWnd::~ExprWnd()
 260 {
 261 }
 262
 263 void ExprWnd::exprList(QStrList& exprs)
 264 {
 265     // ASSERT(exprs does deep-copies)
 266     KTreeViewItem* item;
 267     for (item = itemAt(0); item != 0; item = item->getSibling()) {
 268         exprs.append(item->getText());
 269     }
 270 }
 271
 272 void ExprWnd::insertExpr(VarTree* expr)
 273 {
 274     // append the expression
 275     insertItem(expr);
 276
 277     collectUnknownTypes(expr);
 278
 279     updateValuesWidth();
 280 }
 281
 282 void ExprWnd::updateExpr(VarTree* expr)
 283 {
 284     // search the root variable
 285     KPath path;
 286     path.push(expr->getText());
 287     KTreeViewItem* item = itemAt(path);
 288     if (item == 0) {
 289         return;
 290     }
 291     // now update it
 292     if (updateExprRec(static_cast<VarTree*>(item), expr)) {
 293         updateVisibleItems();
 294         updateValuesWidth();
 295         repaint();
 296     }
 297     collectUnknownTypes(static_cast<VarTree*>(item));
 298 }
 299
 300 void ExprWnd::updateExpr(VarTree* display, VarTree* newValues)
 301 {
 302     if (updateExprRec(display, newValues) && display->isVisible()) {
 303         updateVisibleItems();
 304         updateValuesWidth();
 305         repaint();
 306     }
 307     collectUnknownTypes(display);
 308 }
 309
 310 /*
 311  * returns true if there's a visible change
 312  */
 313 bool ExprWnd::updateExprRec(VarTree* display, VarTree* newValues)
 314 {
 315     bool isExpanded = display->isExpanded();
 316
 317     /*
 318      * If we are updating a pointer without children by a dummy, we don't
 319      * collapse it, but simply insert the new children. This happens when a
 320      * pointer has just been expanded by the user.
 321      */
 322     if (display->m_varKind == VarTree::VKpointer &&
 323         display->childCount() == 0 &&
 324         newValues->m_varKind == VarTree::VKdummy)
 325     {
 326         replaceChildren(display, newValues);
 327         return isExpanded;              /* no visible change if not expanded */
 328     }
 329
 330     /*
 331      * If the display and newValues have different kind or if their number
 332      * of children is different, replace the whole sub-tree.
 333      */
 334     if (// the next two lines mean: not(m_varKind remains unchanged)
 335         !(newValues->m_varKind == VarTree::VKdummy ||
 336           display->m_varKind == newValues->m_varKind)
 337         ||
 338         (display->childCount() != newValues->childCount() &&
 339          /*
 340           * If this is a pointer and newValues doesn't have children, we
 341           * don't replace the sub-tree; instead, below we mark this
 342           * sub-tree for requiring an update.
 343           */
 344          (display->m_varKind != VarTree::VKpointer ||
 345           newValues->childCount() != 0)))
 346     {
 347         if (isExpanded) {
 348             collapseSubTree(display, false);
 349         }
 350
 351         // since children changed, it is likely that the type has also changed
 352         display->m_type = 0;            /* will re-evaluate the type */
 353
 354         // display the new value
 355         updateSingleExpr(display, newValues);
 356         replaceChildren(display, newValues);
 357
 358         // update the m_varKind
 359         if (newValues->m_varKind != VarTree::VKdummy) {
 360             display->m_varKind = newValues->m_varKind;
 361             display->setDelayedExpanding(newValues->m_varKind == VarTree::VKpointer);
 362         }
 363
 364         // (note that the new value might not have a sub-tree at all)
 365         return display->m_valueChanged || isExpanded;   /* no visible change if not expanded */
 366     }
 367
 368     // display the new value
 369     updateSingleExpr(display, newValues);
 370
 371     /*
 372      * If this is an expanded pointer, record it for being updated.
 373      */
 374     if (display->m_varKind == VarTree::VKpointer) {
 375         if (isExpanded &&
 376             // if newValues is a dummy, we have already updated this pointer
 377             newValues->m_varKind != VarTree::VKdummy)
 378         {
 379             m_updatePtrs.append(display);
 380         }
 381         /*
 382          * If the visible sub-tree has children, but newValues doesn't, we
 383          * can stop here.
 384          */
 385         if (newValues->childCount() == 0) {
 386             return display->m_valueChanged;
 387         }
 388     }
 389
 390     ASSERT(display->childCount() == newValues->childCount());
 391
 392     // go for children
 393     bool childChanged = false;
 394
 395     VarTree* vDisplay = static_cast<VarTree*>(display->getChild());
 396     VarTree* vNew = static_cast<VarTree*>(newValues->getChild());
 397     while (vDisplay != 0) {
 398         // check whether the names are the same
 399         if (strcmp(vDisplay->getText(), vNew->getText()) != 0) {
 400             // set new name
 401             vDisplay->setText(vNew->getText());
 402             int i = itemRow(vDisplay);
 403             if (i >= 0) {
 404                 updateCell(i, 0, true);
 405                 childChanged = true;
 406             }
 407         }
 408         // recurse
 409         if (updateExprRec(vDisplay, vNew)) {
 410             childChanged = true;
 411         }
 412         vDisplay = static_cast<VarTree*>(vDisplay->getSibling());
 413         vNew = static_cast<VarTree*>(vNew->getSibling());
 414     }
 415
 416     // update of children propagates only if this node is expanded
 417     return display->m_valueChanged || (display->isExpanded() && childChanged);
 418 }
 419
 420 void ExprWnd::updateSingleExpr(VarTree* display, VarTree* newValue)
 421 {
 422     /*
 423      * If newValues is a VKdummy, we are only interested in its children.
 424      * No need to update anything here.
 425      */
 426     if (newValue->m_varKind == VarTree::VKdummy) {
 427         return;
 428     }
 429
 430     /*
 431      * If this node is a struct and we know its type then don't update its
 432      * value now. This is a node for which we know how to find a nested
 433      * value. So register the node for an update.
 434      */
 435     if (display->m_varKind == VarTree::VKstruct &&
 436         display->m_type != 0 &&
 437         display->m_type != TypeInfo::unknownType())
 438     {
 439         ASSERT(newValue->m_varKind == VarTree::VKstruct);
 440         display->m_partialValue = display->m_type->m_displayString[0];
 441         m_updateStruct.append(display);
 442     }
 443     else
 444     {
 445         if (display->updateValue(newValue->m_value)) {
 446             int i = itemRow(display);
 447             if (i >= 0) {
 448                 updateCell(i, 1, true);
 449             }
 450         }
 451     }
 452 }
 453
 454 void ExprWnd::updateStructValue(VarTree* display)
 455 {
 456     ASSERT(display->m_varKind == VarTree::VKstruct);
 457
 458     if (display->updateValue(display->m_partialValue)) {
 459         int i = itemRow(display);
 460         if (i >= 0) {
 461             updateValuesWidth();
 462             updateCell(i, 1, true);
 463         }
 464     }
 465     // reset the value
 466     display->m_partialValue = "";
 467     display->m_exprIndex = -1;
 468 }
 469
 470 void ExprWnd::replaceChildren(VarTree* display, VarTree* newValues)
 471 {
 472     ASSERT(display->childCount() == 0 || display->m_varKind != VarTree::VKsimple);
 473
 474     // delete all children of display
 475     KTreeViewItem* c;
 476     while ((c = display->getChild()) != 0) {
 477         display->removeChild(c);
 478     }
 479     // insert copies of the newValues
 480     for (c = newValues->getChild(); c != 0; c = c->getSibling()) {
 481         VarTree* v = static_cast<VarTree*>(c);
 482         VarTree* vNew = new VarTree(v->getText(), v->m_nameKind);
 483         vNew->m_varKind = v->m_varKind;
 484         vNew->m_value = v->m_value;
 485         vNew->m_type = v->m_type;
 486         vNew->setDelayedExpanding(vNew->m_varKind == VarTree::VKpointer);
 487         vNew->setExpanded(v->isExpanded());
 488         display->appendChild(vNew);
 489         // recurse
 490         replaceChildren(vNew, v);
 491     }
 492 }
 493
 494 void ExprWnd::collectUnknownTypes(VarTree* var)
 495 {
 496     /*
 497      * forEveryItem does not scan the root item itself. So we must do it
 498      * ourselves.
 499      */
 500     ASSERT(var->m_varKind != VarTree::VKpointer || var->m_nameKind != VarTree::NKtype);
 501     if (var->m_type == 0 &&
 502         var->m_varKind == VarTree::VKstruct &&
 503         var->m_nameKind != VarTree::NKtype)
 504     {
 505         /* this struct node doesn't have a type yet: register it */
 506         m_updateType.append(var);
 507     }
 508
 509     // add pointer pixmap to pointers
 510     if (var->m_varKind == VarTree::VKpointer) {
 511         var->setPixmap(m_pixPointer);
 512     }
 513
 514     forEveryItem(collectUnknownTypes, this, var);
 515 }
 516
 517 bool ExprWnd::collectUnknownTypes(KTreeViewItem* item, void* user)
 518 {
 519     VarTree* var = static_cast<VarTree*>(item);
 520     ExprWnd* tree = static_cast<ExprWnd*>(user);
 521     ASSERT(var->m_varKind != VarTree::VKpointer || var->m_nameKind != VarTree::NKtype);
 522     if (var->m_type == 0 &&
 523         var->m_varKind == VarTree::VKstruct &&
 524         var->m_nameKind != VarTree::NKtype)
 525     {
 526         /* this struct node doesn't have a type yet: register it */
 527         tree->m_updateType.append(var);
 528     }
 529     // add pointer pixmap to pointers
 530     if (var->m_varKind == VarTree::VKpointer) {
 531         var->setPixmap(tree->m_pixPointer);
 532     }
 533     return false;
 534 }
 535
 536
 537 VarTree* ExprWnd::topLevelExprByName(const char* name)
 538 {
 539     KPath path;
 540     path.push(name);
 541     KTreeViewItem* item = itemAt(path);
 542
 543     return static_cast<VarTree*>(item);
 544 }
 545
 546 VarTree* ExprWnd::ptrMemberByName(VarTree* v, const QString& name)
 547 {
 548     // v must be a pointer variable, must have children
 549     if (v->m_varKind != VarTree::VKpointer || v->childCount() == 0)
 550         return 0;
 551
 552     // the only child of v is the pointer value that represents the struct
 553     KTreeViewItem* item = v->getChild();
 554     return memberByName(static_cast<VarTree*>(item), name);
 555 }
 556
 557 VarTree* ExprWnd::memberByName(VarTree* v, const QString& name)
 558 {
 559     // search immediate children for name
 560     KTreeViewItem* item = v->getChild();
 561     while (item != 0 && item->getText() != name)
 562         item = item->getSibling();
 563
 564     if (item != 0)
 565         return static_cast<VarTree*>(item);
 566
 567     // try in base classes
 568     item = v->getChild();
 569     while (item != 0 &&
 570            static_cast<VarTree*>(item)->m_nameKind == VarTree::NKtype)
 571     {
 572         v = memberByName(static_cast<VarTree*>(item), name);
 573         if (v != 0)
 574             return v;
 575         item = item->getSibling();
 576     }
 577     return 0;
 578 }
 579
 580 void ExprWnd::removeExpr(VarTree* item)
 581 {
 582     // must remove any pointers scheduled for update from the list
 583     sweepList(m_updatePtrs, item);
 584     sweepList(m_updateType, item);
 585     sweepList(m_updateStruct, item);
 586
 587     takeItem(item);
 588     delete item;
 589
 590     updateValuesWidth();
 591 }
 592
 593 void ExprWnd::sweepList(QList<VarTree>& list, VarTree* subTree)
 594 {
 595     if (subTree == 0)
 596         return;
 597
 598     VarTree* checkItem = list.first();
 599     while (checkItem != 0) {
 600         if (!subTree->isAncestorEq(checkItem)) {
 601             // checkItem is not an item from subTree
 602             // advance
 603             checkItem = list.next();
 604         } else {
 605             // checkItem is an item from subTree
 606             /*
 607              * If checkItem is the last item in the list, we need a special
 608              * treatment, because remove()ing it steps the current item of
 609              * the list in the "wrong" direction.
 610              */
 611             if (checkItem == list.getLast()) { // does not set current item
 612                 list.remove();
 613                 /* we deleted the last element, so we've finished */
 614                 checkItem = 0;
 615             } else {
 616                 list.remove();
 617                 /* remove() advanced already */
 618                 checkItem = list.current();
 619             }
 620         }
 621     }
 622 }
 623
 624 QString ExprWnd::exprStringAt(int index)
 625 {
 626     KTreeViewItem* item = itemAt(index);
 627     if (item == 0) return QString();    /* paranoia */
 628     VarTree* expr = static_cast<VarTree*>(item);
 629     return expr->computeExpr();
 630 }
 631
 632 void ExprWnd::clearPendingUpdates()
 633 {
 634     m_updatePtrs.clear();
 635     m_updateType.clear();
 636     m_updateStruct.clear();
 637 }
 638
 639 VarTree* ExprWnd::nextUpdatePtr()
 640 {
 641     VarTree* ptr = m_updatePtrs.first();
 642     if (ptr != 0) {
 643         m_updatePtrs.remove();
 644     }
 645     return ptr;
 646 }
 647
 648 VarTree* ExprWnd::nextUpdateType()
 649 {
 650     VarTree* ptr = m_updateType.first();
 651     if (ptr != 0) {
 652         m_updateType.remove();
 653     }
 654     return ptr;
 655 }
 656
 657 VarTree* ExprWnd::nextUpdateStruct()
 658 {
 659     VarTree* ptr = m_updateStruct.first();
 660     if (ptr != 0) {
 661         m_updateStruct.remove();
 662     }
 663     return ptr;
 664 }
 665
 666 void ExprWnd::paintCell(QPainter* painter, int row, int col)
 667 {
 668     if (col == 0) {
 669         KTreeView::paintCell(painter, row, col);
 670     } else {
 671         VarTree* item = static_cast<VarTree*>(itemAt(row));
 672         if (item != 0) {
 673             item->paintValue(painter);
 674         }
 675     }
 676 }
 677
 678 int ExprWnd::cellWidth(int col) const
 679 {
 680     if (col == 0) {
 681         return KTreeView::cellWidth(col);
 682     } else {
 683         return maxValueWidth;
 684     }
 685 }
 686
 687 void ExprWnd::updateValuesWidth()
 688 {
 689     int maxW = 0;
 690     forEveryVisibleItem(static_cast<KForEveryFunc>(&getMaxValueWidth), &maxW);
 691     maxValueWidth = maxW;
 692     updateTableSize();
 693 }
 694
 695 // called by updateValuesWidth() for each item in the visible list
 696 bool ExprWnd::getMaxValueWidth(KTreeViewItem* item, void* user)
 697 {
 698     int *maxW = (int *)user;
 699     VarTree* v = static_cast<VarTree*>(item);
 700     int w = v->valueWidth();
 701     if(w > *maxW)
 702         *maxW = w;
 703     return false;
 704 }
 705
 706 void ExprWnd::slotExpandOrCollapse(int)
 707 {
 708     updateValuesWidth();
 709 }
 710
 711 void ExprWnd::editValue(int row, const QString& text)
 712 {
 713     int x;
 714     colXPos(1, &x);
 715     int y;
 716     rowYPos(row, &y);
 717     int w = cellWidth(1);
 718     int h = cellHeight(row);
 719     QScrollBar* sbV = static_cast<QScrollBar*>(child("table_sbV"));
 720
 721     /*
 722      * Make the edit widget at least 5 characters wide (but not wider than
 723      * this widget). If less than half of this widget is used to display
 724      * the text, scroll this widget so that half of it shows the text (or
 725      * less than half of it if the text is shorter).
 726      */
 727     QFontMetrics metr = m_edit.font();
 728     int wMin = metr.width("88888");
 729     if (w < wMin)
 730         w = wMin;
 731     int wThis = width();
 732     if (sbV->isVisible())       // subtract width of scrollbar
 733         wThis -= sbV->width();
 734     if (x >= wThis/2 &&         // less than half the width displays text
 735         x+w > wThis)            // not all text is visible
 736     {
 737         // scroll so that more text is visible
 738         int wScroll = QMIN(x-wThis/2, x+w-wThis);
 739         sbHor(xOffset()+wScroll);
 740         colXPos(1, &x);
 741     }
 742     else if (x < 0)
 743     {
 744         // don't let the edit move out at the left
 745         x = 0;
 746     }
 747
 748     // make the edit box as wide as the visible column
 749     QRect rect(x,y, wThis-x,h);
 750     m_edit.setText(text);
 751     m_edit.selectAll();
 752
 753     m_edit.setGeometry(rect);
 754     m_edit.m_finished = false;
 755     m_edit.m_row = row;
 756     m_edit.show();
 757     m_edit.setFocus();
 758 }
 759
 760 bool ExprWnd::isEditing() const
 761 {
 762     return m_edit.isVisible();
 763 }
 764
 765
 766 ValueEdit::ValueEdit(ExprWnd* parent) :
 767         QLineEdit(parent, "valueedit")
 768 {
 769     setFrame(false);
 770     hide();
 771     lower();    // lower the window below scrollbars
 772     connect(parent, SIGNAL(selected(int)), SLOT(slotSelectionChanged()));
 773     connect(parent, SIGNAL(collapsed(int)), SLOT(slotSelectionChanged()));
 774     connect(parent, SIGNAL(expanded(int)), SLOT(slotSelectionChanged()));
 775     connect(this, SIGNAL(done(int, const QString&)),
 776             parent, SIGNAL(editValueCommitted(int, const QString&)));
 777 }
 778
 779 ValueEdit::~ValueEdit()
 780 {
 781 }
 782
 783 void ValueEdit::terminate(bool commit)
 784 {
 785     TRACE(commit?"ValueEdit::terminate(true)":"ValueEdit::terminate(false)");
 786     if (!m_finished)
 787     {
 788         m_finished = true;
 789         hide(); // will call focusOutEvent, that's why we need m_finished
 790         if (commit) {
 791             emit done(m_row, text());
 792         }
 793     }
 794 }
 795
 796 void ValueEdit::keyPressEvent(QKeyEvent *e)
 797 {
 798     if(e->key() == Qt::Key_Return || e->key() == Qt::Key_Enter)
 799         terminate(true);
 800     else if(e->key() == Qt::Key_Escape)
 801         terminate(false);
 802     else
 803         QLineEdit::keyPressEvent(e);
 804 }
 805
 806 void ValueEdit::paintEvent(QPaintEvent* e)
 807 {
 808     QLineEdit::paintEvent(e);
 809
 810     QPainter p(this);
 811     p.drawRect(rect());
 812 }
 813
 814 void ValueEdit::focusOutEvent(QFocusEvent* ev)
 815 {
 816     TRACE("ValueEdit::focusOutEvent");
 817     QFocusEvent* focusEv = static_cast<QFocusEvent*>(ev);
 818     // Don't let a RMB close the editor
 819     if (focusEv->reason() != QFocusEvent::Popup &&
 820         focusEv->reason() != QFocusEvent::ActiveWindow)
 821     {
 822         terminate(true);
 823     }
 824 }
 825
 826 void ValueEdit::slotSelectionChanged()
 827 {
 828     TRACE("ValueEdit::slotSelectionChanged");
 829     terminate(false);
 830 }