I have the following code for formatting a QTableWidget. The sortItems method sorts alphabetically and not numerically. Is there an easy fix to this code to be able to do so? Please be explicit as I a quite new at Qt.

Qt Code: 
  1. void myClass::formatTable(QTableWidget *table, double minimum, double maximum)
  2. {
  3.     double val;
  4.     int i;
  5.     int nrow = table->rowCount();
  7.     table->setSortingEnabled(false);
  8.  
  9.     for (i = 0; i < nrow; i++)
  10.     {
  11.         // obtain tableWidgetItem
  12.         item = table->item(i, 0);
  13.  
  14.         // ensure item is not NULL, otherwise the application will crash!
  15.         if (!item)
  16.         {
  17.             continue;
  18.         }
  19.  
  20.         // obtain cell string and convert to double value
  21.         val = item->text().toDouble();
  22.  
  23.         // make sure entries like ".7" are converted to "0.7". otherwise, sorting will be incorrect
  24.         item->setText(QString::number(val));
  25.  
  26.   // TRIED THIS BUT DID NOT WORK
  27.   //      item->setData(Qt::DisplayRole, val);
  28.  
  29.  
  30.         // check the low bound
  31.         if (val <= minimum)
  32.         {
  33.             item->setText(QString::number(minimum));
  34.         }
  35.  
  36.         // check the high bound
  37.         if (val >= maximum)
  38.         {
  39.             item->setText(QString::number(maximum));
  40.         }
  41.  
  42.         // justification
  43.         item->setTextAlignment(Qt::AlignRight);
  44.     }
  45.  
  46.     table->sortItems(0, Qt::AscendingOrder);
  47. }
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