Struct gsk4::ConicGradientNode

pub struct ConicGradientNode(_);

A render node for a conic gradient.

Implementations

impl ConicGradientNode

pub fn new(
    bounds: &Rect,
    center: &Point,
    rotation: f32,
    color_stops: &[ColorStop]
) -> Self

Creates a RenderNode that draws a conic gradient.

The conic gradient starts around center in the direction of rotation. A rotation of 0 means that the gradient points up. Color stops are then added clockwise.

bounds

the bounds of the node

center

the center of the gradient

rotation

the rotation of the gradient in degrees

color_stops

a pointer to an array of ColorStop defining the gradient. The offsets of all color stops must be increasing. The first stop’s offset must be >= 0 and the last stop’s offset must be <= 1.

Returns

A new RenderNode

pub fn center(&self) -> Point

Retrieves the center pointer for the gradient.

Returns

the center point for the gradient

pub fn angle(&self) -> f32

This is supported on crate feature v4_2 only.

Retrieves the angle for the gradient in radians, normalized in [0, 2 * PI].

The angle is starting at the top and going clockwise, as expressed in the css specification:

angle = 90 - rotation()

Returns

the angle for the gradient

pub fn color_stops(&self) -> Vec<ColorStop>

Retrieves the color stops in the gradient.

Returns

the color stops in the gradient

pub fn n_color_stops(&self) -> usize

Retrieves the number of color stops in the gradient.

Returns

the number of color stops

pub fn rotation(&self) -> f32

Retrieves the rotation for the gradient in degrees.

Returns

the rotation for the gradient

Methods from Deref<Target = RenderNode>

pub fn downcast_ref<T: IsRenderNode>(&self) -> Option<&T>

pub fn draw(&self, cr: &Context)

Draw the contents of self to the given cairo context.

Typically, you’ll use this function to implement fallback rendering of RenderNodes on an intermediate Cairo context, instead of using the drawing context associated to a gdk::Surface’s rendering buffer.

For advanced nodes that cannot be supported using Cairo, in particular for nodes doing 3D operations, this function may fail.

cr

cairo context to draw to

pub fn bounds(&self) -> Rect

Retrieves the boundaries of the self.

The node will not draw outside of its boundaries.

Returns

bounds

return location for the boundaries

pub fn node_type(&self) -> RenderNodeType

Returns the type of the self.

Returns

the type of the RenderNode

pub fn serialize(&self) -> Bytes

Serializes the self for later deserialization via deserialize(). No guarantees are made about the format used other than that the same version of GTK will be able to deserialize the result of a call to serialize() and deserialize() will correctly reject files it cannot open that were created with previous versions of GTK.

The intended use of this functions is testing, benchmarking and debugging. The format is not meant as a permanent storage format.

Returns

a GBytes representing the node.

pub fn write_to_file<P: AsRef<Path>>(&self, filename: P) -> Result<(), Error>

This function is equivalent to calling serialize() followed by g_file_set_contents().

See those two functions for details on the arguments.

It is mostly intended for use inside a debugger to quickly dump a render node to a file for later inspection.

filename

the file to save it to.

Returns

true if saving was successful

Trait Implementations

impl AsRef<RenderNode> for ConicGradientNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl Clone for ConicGradientNode

fn clone(&self) -> ConicGradientNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConicGradientNode

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

Formats the value using the given formatter.

impl Deref for ConicGradientNode

type Target = RenderNode

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Display for ConicGradientNode

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

Formats the value using the given formatter.

impl Hash for ConicGradientNode

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl IsRenderNode for ConicGradientNode

const NODE_TYPE: RenderNodeType

fn upcast(self) -> RenderNode

fn upcast_ref(&self) -> &RenderNode

impl Ord for ConicGradientNode

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<ConicGradientNode> for ConicGradientNode

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

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

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

This method tests for !=.

impl PartialOrd<ConicGradientNode> for ConicGradientNode

fn partial_cmp(&self, other: &ConicGradientNode) -> 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 ConicGradientNode

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for ConicGradientNode

impl StructuralEq for ConicGradientNode

impl StructuralPartialEq for ConicGradientNode