QTableView row heights

**wysota** · 6th April 2006, 09:09

You may use a custom delegate with different padding values.

**Brandybuck** · 7th April 2006, 04:20

I'm not sure exactly what you mean. I looked in QItemDelegate source, and I see that there is a hardcoded text margin of 3. Is this what you mean? It is the only thing I can find that could be considered "padding". Will I have to rewrite all of QItemDelegate's display code in order to resize some rows? In such a case I might as well inherit from QAbstractItemDelegate instead!

I am aghast that something that should be simple is so difficult. Am I just being stupid?

**Brandybuck** · 7th April 2006, 05:29

Solved! It turns out that even though the vertical header is hidden, it is still being used to calculate the minimum row height. The only way I can figure to change this is by tweaking the font size for the header. Since it's hidden the smaller font won't be seen. That's probably not the best solution, but it works.

**wysota** · 7th April 2006, 10:10

Originally Posted by Brandybuck

I'm not sure exactly what you mean. I looked in QItemDelegate source, and I see that there is a hardcoded text margin of 3. Is this what you mean? It is the only thing I can find that could be considered "padding". Will I have to rewrite all of QItemDelegate's display code in order to resize some rows? In such a case I might as well inherit from QAbstractItemDelegate instead!

I am aghast that something that should be simple is so difficult. Am I just being stupid?

Item size is determined by the size returned by delegate's sizeHint method, which is in turn based on getting data from SizeHintRole of the item, so you can either reimplement sizeHint(), set data for SizeHintRole of the items (or the whole model) or reimplement the delegate's painting routine (note that this will not alter the cell size, only its content).

**Brandybuck** · 7th April 2006, 21:42

Originally Posted by wysota

Item size is determined by the size returned by delegate's sizeHint method.

I eventually discovered that, but it wasn't working for me. My problem was that the QHeaderView was placing a minimum size on the row heights, so that while I could make the rows bigger, I could not make them smaller. See my solution above.

**ghorwin** · 7th November 2006, 03:08

I still have a problem with my row heights. I cannot make the font of my headers smaller, because I use them. And the size hint I set in my costum item delegate only works for the actual table cells, but not for the headers.

Does anyone know how I can set the row heights for the headers?

Bye,
Andreas