Struct LayoutHelper 

pub struct LayoutHelper;

Provides helper methods needed for layout.

Implementations

impl LayoutHelper

pub const LAYOUT_EPSILON: f64 = 0.00000153

Epsilon value used for certain layout calculations. Based on the value in WPF LayoutDoubleUtil.

pub fn apply_layout_constraints(control: &Layoutable, constraints: Size) -> Size

Calculates a control’s size based on its width, height, min-width, min-height, max-width and max-height.

pub fn measure_child_with_border( control: Option<&Layoutable>, available_size: Size, padding: Thickness, border_thickness: Thickness, ) -> Size

Measures a child with padding and a border, returning the desired size including them.

pub fn measure_child( control: Option<&Layoutable>, available_size: Size, padding: Thickness, ) -> Size

Measures a child with padding, returning the desired size including the padding.

pub fn arrange_child_with_border( child: Option<&Layoutable>, available_size: Size, padding: Thickness, border_thickness: Thickness, ) -> Size

Arranges a child inside padding and a border.

pub fn arrange_child( child: Option<&Layoutable>, available_size: Size, padding: Thickness, ) -> Size

Arranges a child inside padding.

pub fn invalidate_self_and_children_measure(control: &Layoutable)

Invalidates measure for the control and all of its visual descendants.

pub fn get_layout_scale(control: &Layoutable) -> f64

Obtains the layout scale of the given control, based on its layout root.

pub fn round_layout_size_up(size: Size, dpi_scale: f64) -> Size

Rounds a size to an integer number of device pixels, rounding up.

pub fn round_layout_thickness(thickness: Thickness, dpi_scale: f64) -> Thickness

Rounds a thickness to integer numbers of device pixels.

pub fn round_layout_point(point: Point, dpi_scale: f64) -> Point

Rounds a point to integer device pixels.

pub fn round_layout_value(value: f64, dpi_scale: f64) -> f64

Calculates the value to be used for layout rounding at high DPI by rounding the value up or down to the nearest pixel.

pub fn round_layout_value_up(value: f64, dpi_scale: f64) -> f64

Calculates the value to be used for layout rounding at high DPI by rounding the value up to the nearest pixel.

pub fn validate_scaling(scaling: f64) -> f64

Validates a render/layout scaling value, normalizing values close to one to exactly one. Panics on invalid values.