MaxSize

MaxSize — a layout modifier that caps a child to a maximum width and/or height.

The child is proposed the lesser of the parent's proposal and the configured maximum on each axis; the reported size is then clamped again so a child that intrinsically overshoots the cap is always contained. Axes with no maximum set are passed through unchanged.

MaxSize clips its child when a maximum is active (clips_children() == true) so content that still overflows after layout does not bleed into adjacent widgets. Maximum values can be static or bound to a reactive Signal<f32> for animated or data-driven constraints.

For the inverse operation (ensuring a minimum size) see MinSize.

#![allow(unused)]
fn main() {
use teksilo_widgets::primitives::{MaxSize, TextWidget};
use teksilo_i18n::lit;
// Cap a text widget to 240 logical pixels wide.
let _w = MaxSize::width(240.0)
    .child(TextWidget::new(lit!("This text will not exceed 240 dp.")));
}

Builder methods at a glance

width, height, max_width, max_height, child_id, child

API reference

📖 Full rustdoc API for this module

pub struct MaxSize

Layout modifier that enforces a maximum width and/or height on a single child widget.

Constraints can be static or bound to a reactive Signal<f32> for dynamic resizing.

#![allow(unused)]
fn main() {
pub struct MaxSize { /* fields */ }
}

Methods

pub fn new(width: f32, height: f32) -> Self

Cap both axes: the child's width will not exceed width and its height will not exceed height.

pub fn width(width: f32) -> Self

Cap only the width axis; the height axis is unconstrained by this modifier.

pub fn height(height: f32) -> Self

Cap only the height axis; the width axis is unconstrained by this modifier.

pub fn max_width(mut self, state: impl Into<Prop<f32>>) -> Self

Bind max width to a reactive state.

pub fn max_height(mut self, state: impl Into<Prop<f32>>) -> Self

Bind max height to a reactive state.

pub fn child_id(mut self, id: WidgetId) -> Self

Set child by pre-registered ID.

pub fn child(mut self, widget: impl Widget + 'static) -> Self

Set an inline child widget (deferred insertion).