Resize Columns when QTableView is full screen and default size

[nagabathula]

Hello every one i have a QTableView in which i am displaying some data, I wanted to know how i can resize the Cells in the QTableView when i resize the window to full screen. right now there is white space after four columns. I wanted to resize the column size so that there is no white space seen when i see it in the Full Screen also.
I tried a few things but it din't work as expected.

tableView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 
	  tableView->setColumnWidth(0,100);
	  tableView->setColumnWidth(1,100);
	  tableView->setColumnWidth(2,100);
	  tableView->setColumnWidth(3,100);

tableView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

	  tableView->setColumnWidth(0,100);
	  tableView->setColumnWidth(1,100);
	  tableView->setColumnWidth(2,100);
	  tableView->setColumnWidth(3,100);

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i looked on the forum but din't find much help on this issue.. What should i do to resize the columns when i view full screen.

Thank you