Struct CrossFadeNode

pub struct CrossFadeNode { /* private fields */ }

A render node cross fading between two child nodes.

GLib type: Shared boxed type with reference counted clone semantics.

Implementations

impl CrossFadeNode

pub fn as_ptr(&self) -> *mut GskCrossFadeNode

Return the inner pointer to the underlying C value.

pub unsafe fn from_glib_ptr_borrow(ptr: &*mut GskCrossFadeNode) -> &Self

Borrows the underlying C value.

impl CrossFadeNode

pub fn new( start: impl AsRef<RenderNode>, end: impl AsRef<RenderNode>, progress: f32, ) -> CrossFadeNode

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) -> 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) -> RenderNode

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

Returns

a RenderNode

Methods from Deref<Target = RenderNode>

pub fn as_ptr(&self) -> *mut GskRenderNode

Return the inner pointer to the underlying C value.

pub const NONE: Option<&'static RenderNode> = None

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 opaque_rect(&self) -> Option<Rect>

Available on crate feature v4_16 only.

Gets an opaque rectangle inside the node that GTK can determine to be fully opaque.

There is no guarantee that this is indeed the largest opaque rectangle or that regions outside the rectangle are not opaque. This function is a best effort with that goal.

The rectangle will be fully contained in the bounds of the node.

Returns

true if part or all of the rendernode is opaque, false if no opaque region could be found.

pub fn serialize(&self) -> Bytes

Serializes the @self for later deserialization via gsk_render_node_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 gsk_render_node_serialize() and gsk_render_node_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(&self, filename: impl AsRef<Path>) -> Result<(), Error>

This function is equivalent to calling serialize() followed by 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

pub fn is<T: IsRenderNode>(&self) -> bool

pub fn type_(&self) -> Type

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

Trait Implementations

impl AsRef<RenderNode> for CrossFadeNode

fn as_ref(&self) -> &RenderNode

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for CrossFadeNode

fn clone(&self) -> Self

Makes a clone of this shared reference.

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

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<'a> FromValue<'a> for CrossFadeNode

Available on crate feature v4_6 only.

type Checker = GenericValueTypeOrNoneChecker<CrossFadeNode>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl IsRenderNode for CrossFadeNode

const NODE_TYPE: RenderNodeType = RenderNodeType::CrossFadeNode

fn upcast(self) -> RenderNode

fn upcast_ref(&self) -> &RenderNode

impl StaticType for CrossFadeNode

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for CrossFadeNode

Available on crate feature v4_6 only.

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifier of self.

impl ToValueOptional for CrossFadeNode

Available on crate feature v4_6 only.

fn to_value_optional(s: Option<&Self>) -> Value

Convert an Option to a Value.

impl ValueType for CrossFadeNode

Available on crate feature v4_6 only.

type Type = CrossFadeNode

Type to get the Type from.