pub struct ConstraintBuilder { /* private fields */ }
Expand description

A builder-pattern type to construct Constraint objects.

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impl ConstraintBuilder

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pub fn constant(self, constant: f64) -> Self

The constant value to be added to the source-attribute.

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pub fn multiplier(self, multiplier: f64) -> Self

The multiplication factor to be applied to the source-attribute.

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pub fn relation(self, relation: ConstraintRelation) -> Self

The order relation between the terms of the constraint.

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pub fn source(self, source: &impl IsA<ConstraintTarget>) -> Self

The source of the constraint.

The constraint will set the target-attribute property of the target using the source-attribute property of the source.

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pub fn source_attribute(self, source_attribute: ConstraintAttribute) -> Self

The attribute of the source read by the constraint.

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pub fn strength(self, strength: i32) -> Self

The strength of the constraint.

The strength can be expressed either using one of the symbolic values of the ConstraintStrength enumeration, or any positive integer value.

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pub fn target(self, target: &impl IsA<ConstraintTarget>) -> Self

The target of the constraint.

The constraint will set the target-attribute property of the target using the source-attribute property of the source widget.

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pub fn target_attribute(self, target_attribute: ConstraintAttribute) -> Self

The attribute of the target set by the constraint.

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pub fn build(self) -> Constraint

Build the Constraint.

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.