Enum vizia::layout::Units

pub enum Units {
    Pixels(f32),
    Percentage(f32),
    Stretch(f32),
    Auto,
}
Expand description

Units which describe spacing and size.

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Pixels(f32)

A number of logical pixels.

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Percentage(f32)

A percentage of the parent dimension.

A percentage of the parent’s width when applied to left, width, right properties. A percentage of the parent’s height when applied to top, height, bottom properties.

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Stretch(f32)

A factor of the remaining free space.

The remaining free space is the parent space minus the space and size of any fixed-size nodes in that axis. The remaining free space is then shared between any stretch nodes based on the ratio of their stretch factors.

For example, given two stretch nodes with factors of 1.0 and 2.0 respectively. The first will occupy 1/3 of the remaining free space while the second will occupy 2/3 of the remaining free space.

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Auto

Automatically determine the value.

When applied to space (left, right, top, bottom) the spacing may be overridden by the parent’s child-space on the same side. For example, a node in a column with Auto left space, with a parent which has Pixel(100.0) child-left space, will get a left spacing of 100px.

When applied to size (width, height) Auto will either size to fit its children, or if there are no children the node will be sized based on the content_size property of the node.

Implementations§

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impl Units

pub fn to_px(&self, parent_value: f32, default: f32) -> f32

Returns the units converted to pixels or a provided default.

pub fn to_px_clamped( &self, parent_value: f32, default: f32, min: Units, max: Units ) -> f32

pub fn clamp(&self, min: Units, max: Units) -> Units

pub fn is_pixels(&self) -> bool

Returns true if the value is in pixels.

pub fn is_percentage(&self) -> bool

Returns true if the value is a percentage.

pub fn is_stretch(&self) -> bool

Returns true if the value is a stretch factor.

pub fn is_auto(&self) -> bool

Returns true if the value is auto.

Trait Implementations§

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impl Clone for Units

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fn clone(&self) -> Units

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Data for Units

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fn same(&self, other: &Units) -> bool

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impl Debug for Units

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Default for Units

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fn default() -> Units

Returns the “default value” for a type. Read more
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impl From<AutoKeyword> for Units

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fn from(_: AutoKeyword) -> Units

Converts to this type from the input type.
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impl From<LengthPixels> for Units

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fn from(length_pixels: LengthPixels) -> Units

Converts to this type from the input type.
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impl From<Percentage> for Units

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fn from(percentage: Percentage) -> Units

Converts to this type from the input type.
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impl From<Stretch> for Units

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fn from(stretch: Stretch) -> Units

Converts to this type from the input type.
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impl From<Units> for Length

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fn from(value: Units) -> Length

Converts to this type from the input type.
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impl From<Units> for LengthOrPercentage

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fn from(units: Units) -> LengthOrPercentage

Converts to this type from the input type.
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impl<'i> Parse<'i> for Units

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fn parse<'t>( input: &mut Parser<'i, 't> ) -> Result<Units, ParseError<'i, CustomParseError<'i>>>

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impl PartialEq for Units

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fn eq(&self, other: &Units) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Res<Units> for Units

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fn set_or_bind<F>(self, cx: &mut Context, entity: Entity, closure: F)
where Self: Sized, F: 'static + Clone + Fn(&mut Context, Self),

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impl ResGet<Units> for Units

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fn get_ref<'a>( &'a self, _: &'a impl DataContext ) -> Option<LensValue<'a, Units>>

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fn get(&self, _: &impl DataContext) -> Units

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impl Copy for Units

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impl StructuralPartialEq for Units

Auto Trait Implementations§

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impl Freeze for Units

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impl RefUnwindSafe for Units

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impl Send for Units

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impl Sync for Units

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impl Unpin for Units

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impl UnwindSafe for Units

Blanket Implementations§

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impl<T> Any for T
where 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> AnyEq for T
where T: Any + PartialEq,

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fn equals(&self, other: &(dyn Any + 'static)) -> bool

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fn as_any(&self) -> &(dyn Any + 'static)

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impl<T> Borrow<T> for T
where 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 T
where 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> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where 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 T
where 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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more