Updates the "value" property to ensure that the range
between lower and upper is in the current page (i.e. between
"value" and "value" + "page_size").
If the range is larger than the page size, then only the start of it will
be in the current page.
A "changed" signal will be emitted if the value is changed.
Updates the "value" property to ensure that the range between lower and upper is in the current page (i.e. between "value" and "value" + "page_size"). If the range is larger than the page size, then only the start of it will be in the current page. A "changed" signal will be emitted if the value is changed.