The return value does not have a reference added, so should not be unreferenced. The page size is normally 0 for GtkScale and nonzero for GtkScrollbar , and indicates the size of the visible area of the widget being scrolled. The page size affects the size of the scrollbar slider.
Inverted ranges have higher values at the top or on the right rather than on the bottom or left.
Gets the current value of the range. Sets the step and page sizes for the range. The step size is used when the user clicks the GtkScrollbar arrows or moves GtkScale via arrow keys. The page size is used for example when moving via Page Up or Page Down keys. Used for keybindings.