Module virtualized 

Virtualization primitives for efficient rendering of large content.

This module provides the foundational types for rendering only visible portions of large datasets, enabling smooth performance with 100K+ items.

Core Types

• Virtualized<T> - Generic container with visible range calculation
• VirtualizedStorage - Owned vs external storage abstraction
• ItemHeight - Fixed vs variable height support
• HeightCache - LRU cache for measured item heights

Example

use ftui_widgets::virtualized::{Virtualized, ItemHeight};

// Create with owned storage
let mut virt: Virtualized<String> = Virtualized::new(10_000);

// Add items
for i in 0..1000 {
    virt.push(format!("Line {}", i));
}

// Get visible range for viewport height
let range = virt.visible_range(24);
println!("Visible: {}..{}", range.start, range.end);

Structs

HeightCache

LRU cache for measured item heights.

VariableHeightsFenwick

Variable height tracker using Fenwick tree for O(log n) prefix sum queries.

Virtualized

A virtualized content container that tracks scroll state and computes visible ranges.

VirtualizedList

A virtualized list widget that renders only visible items.

VirtualizedListPersistState

Persistable state for a VirtualizedListState.

VirtualizedListState

State for the VirtualizedList widget.

Enums

ItemHeight

Height calculation strategy for items.

VirtualizedStorage

Storage strategy for virtualized items.

Traits

RenderItem

Trait for items that can render themselves.