Remove Row Padding In QTableWidget?

Question

After filling a QTableWidget table I call:

table->resizeRowsToContents();

This makes the rows narrower but there is still a lot of padding between each row, as you can see here:

    

Looking at the documentation I found I could set the hight of each row with:

table->verticalHeader()->setDefaultSectionSize(16);  

This removes the padding and gives me the tight spacing I want:

    

However, I'm concerned about using an absolute size in pixels. If the the system font is set to something large the text might not fit in the row.

Is there a way to remove the padding between rows while ensuring the text will always fit?

Answer 1

Use a custom delegate with the QAbstractItemDelegate::sizeHint() method implemented in a way that it will return a correct size according to the font used.

To compute a correct height, you can use a QFontMetrics provided with the option parameter of the sizeHint() method.

int height = option.fontMetrics.height();

or more precisely

int height = option.fontMetrics.boundingRect(index.data().toString()).height();

EDIT: How to use a delegate:

CMyDelegate* delegate = new CMyDelegate(tableView);
tableView->setItemDelegate(delegate);