visualDividerPosition

The center position in the X dimension of the visual divider indicator between panes. If isUserResizable would return false this property will return < 0. If the user is actively dragging the divider this will reflect its current drag position. If not, it will reflect splitDividerPosition if splitDividerPosition would return >= 0, or the automatically determined divider position if splitDividerPosition would return SPLIT_DIVIDER_POSITION_AUTO.