Allow setting minimum size of the rows and columns:
I don't know at design time how many items there will be in the tileview, so if I set fixed height and width for items I can have the control using only 1/10 of the available space, but if I don't set them I can have many too-small items which content cannot be properly displayed.
I need a minsize for the items so if I have few items they have a variable size and if they are a lot they use the scrollbars.