Struct gtk4::CenterBox

#[repr(transparent)]
pub struct CenterBox { /* private fields */ }

CenterBox arranges three children in a row, keeping the middle child centered as well as possible.

To add children to CenterBox, use set_start_widget(), set_center_widget() and set_end_widget().

The sizing and positioning of children can be influenced with the align and expand properties of the children.

GtkCenterBox as GtkBuildable

The CenterBox implementation of the Buildable interface supports placing children in the 3 positions by specifying “start”, “center” or “end” as the “type” attribute of a element.

CSS nodes

CenterBox uses a single CSS node with the name “box”,

The first child of the CenterBox will be allocated depending on the text direction, i.e. in left-to-right layouts it will be allocated on the left and in right-to-left layouts on the right.

In vertical orientation, the nodes of the children are arranged from top to bottom.

Accessibility

CenterBox uses the AccessibleRole::Group role.

Implements

WidgetExt, glib::ObjectExt, AccessibleExt, BuildableExt, ConstraintTargetExt, OrientableExt, WidgetExtManual, AccessibleExtManual

Implementations

impl CenterBox

pub fn new() -> CenterBox

Creates a new CenterBox.

Returns

the new CenterBox.

pub fn builder() -> CenterBoxBuilder

Creates a new builder-pattern struct instance to construct CenterBox objects.

This method returns an instance of CenterBoxBuilder which can be used to create CenterBox objects.

pub fn baseline_position(&self) -> BaselinePosition

Gets the value set by gtk_center_box_set_baseline_position().

Returns

the baseline position

pub fn center_widget(&self) -> Option<Widget>

Gets the center widget, or None if there is none.

Returns

the center widget.

pub fn end_widget(&self) -> Option<Widget>

Gets the end widget, or None if there is none.

Returns

the end widget.

pub fn start_widget(&self) -> Option<Widget>

Gets the start widget, or None if there is none.

Returns

the start widget.

pub fn set_baseline_position(&self, position: BaselinePosition)

Sets the baseline position of a center box.

This affects only horizontal boxes with at least one baseline aligned child. If there is more vertical space available than requested, and the baseline is not allocated by the parent then @position is used to allocate the baseline wrt. the extra space available.

position

a BaselinePosition

pub fn set_center_widget(&self, child: Option<&impl IsA<Widget>>)

Sets the center widget.

To remove the existing center widget, pas None.

child

the new center widget

pub fn set_end_widget(&self, child: Option<&impl IsA<Widget>>)

Sets the end widget.

To remove the existing end widget, pass None.

child

the new end widget

pub fn set_start_widget(&self, child: Option<&impl IsA<Widget>>)

Sets the start widget.

To remove the existing start widget, pass None.

child

the new start widget

pub fn connect_baseline_position_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

Trait Implementations

impl Clone for CenterBox

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CenterBox

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

Formats the value using the given formatter.

impl Default for CenterBox

fn default() -> Self

Returns the “default value” for a type.

impl Display for CenterBox

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

Formats the value using the given formatter.

impl Hash for CenterBox

fn hash<H>(&self, state: &mut H)where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for CenterBox

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl ParentClassIs for CenterBox

type Parent = Widget

impl<OT: ObjectType> PartialEq<OT> for CenterBox

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl<OT: ObjectType> PartialOrd<OT> for CenterBox

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for CenterBox

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for CenterBox

impl IsA<Accessible> for CenterBox

impl IsA<Buildable> for CenterBox

impl IsA<ConstraintTarget> for CenterBox

impl IsA<Orientable> for CenterBox

impl IsA<Widget> for CenterBox