Struct CairoContext

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

GLib type: GObject with reference counted clone semantics.

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

Makes a clone of this shared reference.

This increments the strong reference count of the object. Dropping the object will decrement it again.

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 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,

Hashes the memory address of this object.

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

Comparison for two GObjects.

Compares the memory addresses of the provided objects.

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,

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

Equality for two GObjects.

Two GObjects are equal if their memory addresses are equal.

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

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>

Partial comparison for two GObjects.

Compares the memory addresses of the provided objects.

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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