Function lazy_vertical_grid 

pub fn lazy_vertical_grid() -> LazyVerticalGridBuilder

lazy_vertical_grid

A vertically scrolling grid that only renders items visible in the viewport.

Usage

Display tiled content such as photo galleries or dashboards.

Parameters

• modifier - optional modifier for the scroll container.
• scroll_smoothing - fraction of the remaining distance kept per 60Hz frame while animating a scroll step; defaults to the scrollable default.
• scrollbar_behavior - visibility behavior of the scrollbars.
• scrollbar_track_color - optional scrollbar track color override.
• scrollbar_thumb_color - optional scrollbar thumb color override.
• scrollbar_thumb_hover_color - optional scrollbar thumb hover color override.
• scrollbar_layout - whether scrollbars are overlaid or laid out alongside content.
• columns - grid cell definition for columns.
• main_axis_spacing - spacing between rows.
• cross_axis_spacing - spacing between columns.
• cross_axis_alignment - how columns are arranged when extra horizontal space is available.
• item_alignment - alignment of items within each cell.
• overscan - number of extra rows instantiated before and after the viewport.
• estimated_item_size - estimated main-axis size for each row.
• content_padding - symmetric padding applied around the grid content.
• max_viewport_main - optional maximum viewport length reported back to parents.
• controller - optional external controller for scroll position and cache.
• item declarations are appended through builder methods like item and items.

Examples

use tessera_components::{
    lazy_grid::{GridCells, lazy_vertical_grid},
    text::text,
    theme::material_theme,
};
use tessera_components::modifier::{ModifierExt as _, SemanticsArgs};
use tessera_ui::{Modifier, tessera};
#[tessera]
fn demo() {
    material_theme().child(|| {
        lazy_vertical_grid()
            .columns(GridCells::fixed(2))
            .overscan(0)
            .items(4, move |i| {
                text(format!("Tile {i}")).modifier(
                    Modifier::new().semantics(SemanticsArgs {
                        test_tag: Some(format!("tile-{i}")), ..Default::default()
                    })
                );
            });
    });
}

let snapshot = tessera_ui::testing::layout_test(demo).run();
for index in 0..4 {
    snapshot.node(&format!("tile-{index}")).exists();
}