Constructor - Keyed Column

Authoritative source: ref/doc/iced/widget/fn.keyed_column.html.

# Rustdoc summary

Creates a new keyed::Column from an iterator of elements.

# Verified signature

pub fn keyed_column<'a, Key, Message, Theme, Renderer>(
    children: impl IntoIterator<Item = (Key, Element<'a, Message, Theme, Renderer>)>,
) -> Column<'a, Key, Message, Theme, Renderer>
where
    Key: Copy + PartialEq,
    Renderer: Renderer,

# When to use

Use this constructor/helper as the typed entrypoint for the widget or layout helper it creates.

# Why to use

It gives explicit widget construction with compile-time type checking and builder chaining.

# Example References

• ref/examples/todos/src/main.rs

# Inline Examples (from rustdoc)

use iced::widget::{keyed_column, text};

enum Message {
    // ...
}

fn view(state: &State) -> Element<'_, Message> {
    keyed_column((0..=100).map(|i| {
        (i, text!("Item {i}").into())
    })).into()
}

# Related

• Constructors
• Elements

# Use this when...

• You want the canonical entrypoint for creating this widget/helper.
• You need concrete constructor arguments and builder chaining.
• You are wiring UI interactions into typed messages.

# Minimal example

// Call this constructor in `view`, then map events to Message variants.

# How it works

Constructors return typed widget values. You configure behavior via builder methods and emit Message values for update to handle.

# Common patterns

// Keep constructor calls close to their message mapping.
// Prefer small helper functions for repeated widget setups.

# Gotchas / tips

• Re-check argument order in the verified signature on this page.
• Keep side effects out of view; trigger them from update with Task.
• Use the related family page when deciding between module/element APIs.