Coloring a QTableview column

[Potch]

Hello,

So far I use the following way to color the colum of a tableview :

// Color the colum
    for (int i = FirstLine; i < Max_Number_of_Lines; i++)
        InputDataModel->setData(InputDataModel->index(i, SelectedColumn), SelectedVariableColor, Qt::BackgroundRole);

// Color the colum
    for (int i = FirstLine; i < Max_Number_of_Lines; i++)
        InputDataModel->setData(InputDataModel->index(i, SelectedColumn), SelectedVariableColor, Qt::BackgroundRole);

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It works but it is very slow when Max_Number_of_Lines is greater than 2000. Then I have to wait 2 or 3s before it's colored.

Would you know if there is a faster (and more clever) way to proceed ?

Thanks in advance