NavigationSplitView.setSidebarWidthFraction
void setSidebarWidthFraction(double fraction)Sets the preferred sidebar width as a fraction of the total width of self.
The preferred width is additionally limited by adw.navigation_split_view.NavigationSplitView.minSidebarWidth and adw.navigation_split_view.NavigationSplitView.maxSidebarWidth.
The sidebar widget can be allocated with larger width if its own minimum width exceeds the preferred width.
Parameters
fraction | the preferred width fraction |