[−][src]Struct druid::BoxConstraints
Constraints for layout.
The layout strategy for druid is strongly inspired by Flutter, and this struct is similar to the Flutter BoxConstraints class.
At the moment, it represents simply a minimum and maximum size.
A widget's layout
method should choose an appropriate size that
meets these constraints.
Further, a container widget should compute appropriate constraints for each of its child widgets, and pass those down when recursing.
Methods
impl BoxConstraints
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pub fn new(min: Size, max: Size) -> BoxConstraints
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Create a new box constraints object.
Create constraints based on minimum and maximum size.
pub fn tight(size: Size) -> BoxConstraints
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Create a "tight" box constraints object.
A "tight" constraint can only be satisfied by a single size.
pub fn loosen(&self) -> BoxConstraints
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Create a "loose" version of the constraints.
Make a version with zero minimum size, but the same maximum size.
pub fn constrain(&self, size: impl Into<Size>) -> Size
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Clamp a given size so that fits within the constraints.
pub fn max(&self) -> Size
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Returns the max size of these constraints.
pub fn min(&self) -> Size
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Returns the min size of these constraints.
pub fn is_width_bounded(&self) -> bool
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Whether there is an upper bound on the width.
pub fn is_height_bounded(&self) -> bool
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Whether there is an upper bound on the height.
pub fn debug_check(&self, name: &str)
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Check to see if these constraints are legit.
Logs a warning if BoxConstraints are invalid.
pub fn shrink(&self, diff: impl Into<Size>) -> BoxConstraints
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Shrink min and max constraints by size
Trait Implementations
impl Clone for BoxConstraints
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fn clone(&self) -> BoxConstraints
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fn clone_from(&mut self, source: &Self)
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impl Copy for BoxConstraints
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impl Debug for BoxConstraints
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Auto Trait Implementations
impl RefUnwindSafe for BoxConstraints
impl Send for BoxConstraints
impl Sync for BoxConstraints
impl Unpin for BoxConstraints
impl UnwindSafe for BoxConstraints
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> RoundFrom<T> for T
fn round_from(x: T) -> T
impl<T, U> RoundInto<U> for T where
U: RoundFrom<T>,
U: RoundFrom<T>,
fn round_into(self) -> U
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,