gtk:tree-view-level-indentation (object)

object -- a gtk:tree-view widget
indentation -- an integer with the amount, in pixels, of extra indentation

Accessor of the level-indentation slot of the gtk:tree-view class. The gtk:tree-view-level-indentation function returns the amount, in pixels, of extra indentation for child levels in the tree view in addition to the default indentation. The (setf gtk:tree-view-level-indentation) function sets the amount of extra indentation.

The value should be specified in pixels, a value of 0 disables this feature and in this case only the default indentation will be used. This does not have any visible effects for lists. The gtk:tree-view implementation is deprecated since 4.10. Please do not use it in newly written code.