Struct gdk4::CairoContext

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

CairoContext is an object representing the platform-specific draw context.

CairoContexts are created for a surface using SurfaceExt::create_cairo_context(), and the context can then be used to draw on that surface.

This is an Abstract Base Class, you cannot instantiate it.

Implements

DrawContextExt, DrawContextExtManual

Implementations

impl CairoContext

pub fn cairo_create(&self) -> Option<Context>

Retrieves a Cairo context to be used to draw on the Surface of @context.

A call to DrawContextExt::begin_frame() with this @context must have been done or this function will return None.

The returned context is guaranteed to be valid until DrawContextExt::end_frame() is called.

Returns

a Cairo context to draw on `GdkSurface

Trait Implementations

impl Clone for CairoContext

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 CairoContext

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

Formats the value using the given formatter.

impl Display for CairoContext

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

Formats the value using the given formatter.

impl HasParamSpec for CairoContext

type ParamSpec = ParamSpecObject

type SetValue = CairoContext

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

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

fn param_spec_builder() -> Self::BuilderFn

impl Hash for CairoContext

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 CairoContext

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 CairoContext

type Parent = DrawContext

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

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 CairoContext

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 CairoContext

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for CairoContext

impl IsA<DrawContext> for CairoContext