#[repr(transparent)]pub struct TextNode { /* private fields */ }
Expand description
A render node drawing a set of glyphs.
Implementations§
source§impl TextNode
impl TextNode
sourcepub fn new(
font: &impl IsA<Font>,
glyphs: &GlyphString,
color: &RGBA,
offset: &Point
) -> Option<TextNode>
pub fn new( font: &impl IsA<Font>, glyphs: &GlyphString, color: &RGBA, offset: &Point ) -> Option<TextNode>
Creates a render node that renders the given glyphs.
Note that @color may not be used if the font contains color glyphs.
font
the pango::Font
containing the glyphs
glyphs
the pango::GlyphString
to render
color
the foreground color to render with
offset
offset of the baseline
Returns
a new RenderNode
sourcepub fn num_glyphs(&self) -> u32
pub fn num_glyphs(&self) -> u32
sourcepub fn has_color_glyphs(&self) -> bool
Available on crate feature v4_2
only.
pub fn has_color_glyphs(&self) -> bool
v4_2
only.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 TextNode
impl AsRef<RenderNode> for TextNode
source§fn as_ref(&self) -> &RenderNode
fn as_ref(&self) -> &RenderNode
source§impl<'a> FromValue<'a> for TextNode
Available on crate feature v4_6
only.
impl<'a> FromValue<'a> for TextNode
v4_6
only.§type Checker = GenericValueTypeOrNoneChecker<TextNode>
type Checker = GenericValueTypeOrNoneChecker<TextNode>
source§unsafe fn from_value(value: &'a Value) -> Self
unsafe fn from_value(value: &'a Value) -> Self
Value
. Read moresource§impl IsRenderNode for TextNode
impl IsRenderNode for TextNode
const NODE_TYPE: RenderNodeType = RenderNodeType::TextNode
fn upcast(self) -> RenderNode
fn upcast_ref(&self) -> &RenderNode
source§impl StaticType for TextNode
impl StaticType for TextNode
source§fn static_type() -> Type
fn static_type() -> Type
Self
.source§impl ToValueOptional for TextNode
Available on crate feature v4_6
only.
impl ToValueOptional for TextNode
v4_6
only.