Well I was coding some things, and I discovered that sorting doesn't work in Qt 4.3.0, for some reason I am doing something wrong, and I tried every method. But it seems that buttons disappear when you sort a widget even if sorting was disabled when adding items.

Does anyone have a solution or workaround for this? I tried adding just with i, or with qt->row(item) or with qt->row() but results haven't changed. I also notice, that it seems to only happen for rows 2,3 82 and 83. It's quite wierd.

Take a look and try this example code:

Qt Code: 
  1. #include <QtGui>
  2.  
  3. int main(int argc, char *argv[])
  4. {
  5.     QApplication app(argc, argv);
  7.     qt->verticalHeader()->setVisible(false);
  8.     qt->setRowCount(85);
  9.     qt->setColumnCount(4);
  10.     qt->setSortingEnabled(false);
  11.     QTableWidgetItem *__colItem = new QTableWidgetItem();
  12.     __colItem->setText(QApplication::translate("t", "t1", 0, QApplication::UnicodeUTF8));
  13.     qt->setHorizontalHeaderItem(0, __colItem);
  14.     QTableWidgetItem *__colItem2 = new QTableWidgetItem();
  15.     __colItem2->setText(QApplication::translate("t", "t2", 0, QApplication::UnicodeUTF8));
  16.     qt->setHorizontalHeaderItem(1, __colItem2);
  17.     QTableWidgetItem *__colItem3 = new QTableWidgetItem();
  18.     __colItem3->setText(QApplication::translate("t", "t3", 0, QApplication::UnicodeUTF8));
  19.     qt->setHorizontalHeaderItem(2, __colItem3);
  20.     QTableWidgetItem *__colItem4 = new QTableWidgetItem();
  21.     __colItem4->setText(QApplication::translate("t", "t4", 0, QApplication::UnicodeUTF8));
  22.     qt->setHorizontalHeaderItem(2, __colItem4);
  24.     QTableWidgetItem* ax2[75];
  25.     QTableWidgetItem* ax3[75];
  26.     QTableWidgetItem* ax4[75];
  27.     QString num;
  28.     for(int i = 0; i < 75; i++){
  29.      if(i < 10){
  30.        num = QString("0%1").arg(i);
  31.      } else {
  32.        num = QString("%1").arg(i);
  33.      }
  34.      //if(isSortingEnabled()) ==== false!!!!
  35.      ax[i] = new QTableWidgetItem(QString("QA%1").arg(num));
  36.      ax2[i] = new QTableWidgetItem(QString("QB%1").arg(num));
  37.      ax3[i] = new QTableWidgetItem(QString("QC%1").arg(num));
  38.      ax4[i] = new QTableWidgetItem(QString("QD%1").arg(num));
  39.      qt->setItem(i, 0, ax[i]);
  40.      qt->setCellWidget(qt->row(ax[i]), 0, new QPushButton(QString("QA%1").arg(num)));
  41.      qt->setItem(qt->row(ax[i]), 1, ax2[i]);
  42.      qt->setCellWidget(qt->row(ax[i]), 1, new QPushButton(QString("QB%1").arg(num)));
  43.      qt->setItem(qt->row(ax[i]), 2, ax3[i]);
  44.      qt->setItem(qt->row(ax[i]), 3, ax4[i]);
  45.     }
  46.     qt->setSortingEnabled(true);
  47.     //qt->sortItems(0, Qt::AscendingOrder);
  48.     qt->sortByColumn(0, Qt::AscendingOrder);
  49.     qt->show();
  50.     return app.exec();
  51. }
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Thank you for your help!