Struct gtk4::FixedLayout

pub struct FixedLayout { /* private fields */ }

FixedLayout is a layout manager which can place child widgets at fixed positions.

Most applications should never use this layout manager; fixed positioning and sizing requires constant recalculations on where children need to be positioned and sized. Other layout managers perform this kind of work internally so that application developers don’t need to do it. Specifically, widgets positioned in a fixed layout manager will need to take into account:

• Themes, which may change widget sizes.

• Fonts other than the one you used to write the app will of course change the size of widgets containing text; keep in mind that users may use a larger font because of difficulty reading the default, or they may be using a different OS that provides different fonts.

• Translation of text into other languages changes its size. Also, display of non-English text will use a different font in many cases.

In addition, FixedLayout does not pay attention to text direction and thus may produce unwanted results if your app is run under right-to-left languages such as Hebrew or Arabic. That is: normally GTK will order containers appropriately depending on the text direction, e.g. to put labels to the right of the thing they label when using an RTL language; FixedLayout won’t be able to do that for you.

Finally, fixed positioning makes it kind of annoying to add/remove UI elements, since you have to reposition all the other elements. This is a long-term maintenance problem for your application.

Implements

LayoutManagerExt, [trait@glib::ObjectExt]

Implementations

impl FixedLayout

pub fn new() -> FixedLayout

Creates a new FixedLayout.

Returns

the newly created FixedLayout

Trait Implementations

impl Clone for FixedLayout

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 FixedLayout

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

Formats the value using the given formatter.

impl Default for FixedLayout

fn default() -> Self

Returns the “default value” for a type.

impl HasParamSpec for FixedLayout

type ParamSpec = ParamSpecObject

type SetValue = FixedLayout

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, FixedLayout>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for FixedLayout

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 FixedLayout

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl ParentClassIs for FixedLayout

type Parent = LayoutManager

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

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 FixedLayout

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 FixedLayout

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for FixedLayout

impl IsA<LayoutManager> for FixedLayout