If it is set to -1, the icon view will automatically determine a suitable item size.
IconView.itemWidth
int itemWidth() @propertyGet itemWidth property.
Returns
The item-width property specifies the width to use for each item.
void itemWidth(int propval) @propertySet itemWidth property.
Parameters
propval | The item-width property specifies the width to use for each item. If it is set to -1, the icon view will automatically determine a suitable item size. |