Struct VListState 

pub struct VListState {
    pub sel: i32,
    pub estimate: i32,
    /* private fields */
}

the state of a list with rows of different heights (see the module header)

Fields

sel: i32

the selected row, -1 none

estimate: i32

the height of a row that was not measured yet (DIP; 0: 40 at first, then the mean of the measured rows)

Implementations

impl VListState

pub fn new() -> VListState

no rows yet, nothing selected

pub fn set_height(&mut self, i: usize, dip: i32)

row i is dip high (the app knows it: its box is not measured); 0 measures it again

pub fn invalidate(&mut self, i: usize)

row i is measured again the next time it is built

pub fn invalidate_all(&mut self)

every row is measured again

pub fn insert(&mut self, at: usize, n: usize)

n rows were inserted before row at: the view keeps showing the rows it showed (also the selection stays on its row)

pub fn remove(&mut self, at: usize, n: usize)

rows at .. at + n were removed (the selection on one of them: none)

pub fn reveal(&mut self, i: usize)

scroll row i fully into view (the next pass)

pub fn scroll_to(&mut self, i: usize)

show row i at the top of the view

pub fn first_visible(&self) -> (usize, i32)

the first visible row and how many px of it are scrolled out above the view

pub fn row_height(&self, i: usize) -> i32

row i’s height in px (measured or given; else the estimate)

pub fn row_known(&self, i: usize) -> bool

row i’s height is measured or given

pub fn set_count(&mut self, n: usize)

the number of rows (vlist_begin sets it from its count; rows come and go at the end)

pub fn scroll_pos(&self) -> i64

the scroll position: px from the first row’s top to the view’s top (rows not measured count with the estimate)

pub fn set_scroll_pos(&mut self, px: i64)

scroll to a position (px; the next pass keeps the view inside the rows)

pub fn total_height(&self) -> i64

the height of all rows (px; rows not measured count with the estimate)

Trait Implementations

impl Clone for VListState

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for VListState

fn default() -> VListState

Returns the “default value” for a type.