The preferred place to ellipsize the string, if the label does not have enough room to display the entire string.
Note that setting this property to a value other than
PANGO_ELLIPSIZE_NONE has the side-effect that the label requests
only enough space to display the ellipsis “…”. In particular, this
means that ellipsizing labels do not work well in notebook tabs, unless
GtkNotebookPage:tab-expand child property is set to
Other ways to set a label’s width are