Struct gsk4::CrossFadeNode

pub struct CrossFadeNode(_);

A render node cross fading between two child nodes.

Implementations

impl CrossFadeNode

pub fn new<P: AsRef<RenderNode>, Q: AsRef<RenderNode>>(
    start: &P,
    end: &Q,
    progress: f32
) -> Self

Creates a RenderNode that will do a cross-fade between start and end.

start

The start node to be drawn

end

The node to be cross_fadeed onto the start node

progress

How far the fade has progressed from start to end. The value will be clamped to the range [0 … 1]

Returns

A new RenderNode

pub fn end_child(&self) -> Option<RenderNode>

Retrieves the child RenderNode at the end of the cross-fade.

Returns

a RenderNode

pub fn progress(&self) -> f32

Retrieves the progress value of the cross fade.

Returns

the progress value, between 0 and 1

pub fn start_child(&self) -> Option<RenderNode>

Retrieves the child RenderNode at the beginning of the cross-fade.

Returns

a RenderNode

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 CrossFadeNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl Clone for CrossFadeNode

fn clone(&self) -> CrossFadeNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CrossFadeNode

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

Formats the value using the given formatter.

impl Deref for CrossFadeNode

type Target = RenderNode

The resulting type after dereferencing.

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

Dereferences the value.

impl Display for CrossFadeNode

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

Formats the value using the given formatter.

impl Hash for CrossFadeNode

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 CrossFadeNode

const NODE_TYPE: RenderNodeType

fn upcast(self) -> RenderNode

fn upcast_ref(&self) -> &RenderNode

impl Ord for CrossFadeNode

fn cmp(&self, other: &CrossFadeNode) -> 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<CrossFadeNode> for CrossFadeNode

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

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

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

This method tests for !=.

impl PartialOrd<CrossFadeNode> for CrossFadeNode

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

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for CrossFadeNode

impl StructuralEq for CrossFadeNode

impl StructuralPartialEq for CrossFadeNode