Trait LayoutableImpl

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pub trait LayoutableImpl: VisualImpl + Upcast<Layoutable> {
    // Provided methods
    fn apply_template(this: &Self) { ... }
    fn measure_core(this: &Self, available_size: Size) -> Size { ... }
    fn measure_override(this: &Self, available_size: Size) -> Size { ... }
    fn arrange_core(this: &Self, final_rect: Rect) { ... }
    fn arrange_override(this: &Self, final_size: Size) -> Size { ... }
    fn on_measure_invalidated(this: &Self) { ... }
}

Expand description

The overridable members introduced by the class.

Provided Methods§

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fn apply_template(this: &Self)

Creates the visual children of the control, if necessary.

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fn measure_core(this: &Self, available_size: Size) -> Size

The default implementation of the control’s measure pass.

This calculates the desired size taking into account the control’s margin and min/max/explicit size, and calls measure_override for the content. Usually measure_override is what you want to override.

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fn measure_override(this: &Self, available_size: Size) -> Size

Measures the control and its child elements as part of a layout pass. Returns the size the control would like to be.

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fn arrange_core(this: &Self, final_rect: Rect)

The default implementation of the control’s arrange pass.

This calculates the final bounds taking into account the control’s margin, alignment and size constraints, and calls arrange_override for the content. Usually arrange_override is what you want to override.

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