#[repr(transparent)]pub struct CairoNode { /* private fields */ }
Expand description
A render node for a Cairo surface.
Implementations§
source§impl CairoNode
impl CairoNode
sourcepub fn new(bounds: &Rect) -> CairoNode
pub fn new(bounds: &Rect) -> CairoNode
Creates a RenderNode
that will render a cairo surface
into the area given by @bounds.
You can draw to the cairo surface using draw_context()
.
bounds
the rectangle to render to
Returns
A new RenderNode
sourcepub fn draw_context(&self) -> Context
pub fn draw_context(&self) -> Context
Creates a Cairo context for drawing using the surface associated to the render node.
If no surface exists yet, a surface will be created optimized for rendering to @renderer.
Returns
a Cairo context used for drawing; use cairo_destroy() when done drawing
Methods from Deref<Target = RenderNode>§
pub const NONE: Option<&'static RenderNode> = None
sourcepub fn draw(&self, cr: &Context)
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 RenderNode
s 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
sourcepub fn node_type(&self) -> RenderNodeType
pub fn node_type(&self) -> RenderNodeType
sourcepub fn serialize(&self) -> Bytes
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.
sourcepub fn write_to_file(&self, filename: impl AsRef<Path>) -> Result<(), Error>
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§
source§impl AsRef<RenderNode> for CairoNode
impl AsRef<RenderNode> for CairoNode
source§fn as_ref(&self) -> &RenderNode
fn as_ref(&self) -> &RenderNode
source§impl<'a> FromValue<'a> for CairoNode
Available on crate feature v4_6
only.
impl<'a> FromValue<'a> for CairoNode
v4_6
only.§type Checker = GenericValueTypeOrNoneChecker<CairoNode>
type Checker = GenericValueTypeOrNoneChecker<CairoNode>
source§unsafe fn from_value(value: &'a Value) -> Self
unsafe fn from_value(value: &'a Value) -> Self
Value
. Read moresource§impl IsRenderNode for CairoNode
impl IsRenderNode for CairoNode
const NODE_TYPE: RenderNodeType = RenderNodeType::CairoNode
fn upcast(self) -> RenderNode
fn upcast_ref(&self) -> &RenderNode
source§impl StaticType for CairoNode
impl StaticType for CairoNode
source§fn static_type() -> Type
fn static_type() -> Type
Self
.source§impl ToValueOptional for CairoNode
Available on crate feature v4_6
only.
impl ToValueOptional for CairoNode
v4_6
only.