[Qt-interest] GUI, Qt, Sorting, QTableWidget, NO sorting even after setSortingEnabled()

[Irfan Omair]

I dont see any other direct way of doing that other than
reimplementing operator< in the subclass.

By the way only few lines of code will do the trick.

    bool myListItem ::operator< ( const QTableWidgetItem &other ) const
    {
        if( this->text().toInt() < other.text().toInt() )
            return true;
        else
            return false;
    }

See detail example below.

#include <QtGui>

class myListItem: public QObject, public QTableWidgetItem
{
    Q_OBJECT
public:
    bool myListItem ::operator< ( const QTableWidgetItem &other ) const
    {
        if( this->text().toInt() < other.text().toInt() )
            return true;
        else
            return false;
    }
};

class MainWindow : public QMainWindow
{

public:
   MainWindow(QWidget *parent = 0)
       : QMainWindow(parent)
   {
       QWidget *w = new QWidget;
       setCentralWidget(w);
       QVBoxLayout *layout = new QVBoxLayout(w);
       QTableWidget *list = new QTableWidget(2,1);
           myListItem *item = new myListItem;
           item->setText(QString("%1").arg(10));
           list->setItem(0,0,item);
           item = new myListItem;
           item->setText(QString("%1").arg(15));
           list->setItem(1,0,item);

       list->setSortingEnabled(true);
       layout->addWidget(list);
   }
};

#include "main.moc"

int main(int argc,char *argv[])
{
   QApplication app(argc,argv);
   MainWindow mainWindow;
   mainWindow.show();
   return app.exec();
}
Hope this helps

Regards,

Irfan Omair

Qt Developer

On Wed, Aug 4, 2010 at 11:19 AM, Mandaya Prakash
<mandaya.prakash at gmail.com>wrote:

>
> Hi All,
>
> My company has now started usin Qt and I am having some probelm with
> QTableWidget sorting.
>
> I have a QTableWidget. And I fill it with some QTableWidgetItem, initiated
> by simple QString,
> actually, just a number like 1,2,10, etc. The problem is that when I set
> tableWidget->setSortingEnabled(true); and then sort by this column, the
> order is 1,10,2..., looks like it's compared as string.
> I don't want to change the code a lot (e.g., creating a customized
> sub-class) to make it sort correctly. So is there any option of the
> table/item that I can just set to make it work?
> Thank you in advance
>
> BR
>
> Prakash.
>
> _______________________________________________
> Qt-interest mailing list
> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest
>
>
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