Struct StreamGeometryContext 

pub struct StreamGeometryContext { /* private fields */ }

Describes a geometry using drawing commands.

This type is used to describe a stream geometry: obtain one by calling StreamGeometry::open. The context is completed when it is disposed or dropped.

Implementations

impl StreamGeometryContext

pub fn new(impl_: Box<dyn IStreamGeometryContextImpl>) -> Self

👎Deprecated:

Use StreamGeometry::open instead.

Creates a context over a platform implementation.

pub fn precise_arc_to( &mut self, point: Point, size: Size, rotation_angle: f64, is_large_arc: bool, sweep_direction: SweepDirection, )

Draws an arc to the specified point using polylines, quadratic or cubic Bezier curves. This is significantly more precise when drawing elliptic arcs with extreme width:height ratios.

The parameters are those of IGeometryContext::arc_to:

• point - The destination point where the arc ends.
• size - The radii of an ellipse whose path is used to draw the arc.
• rotation_angle - The rotation angle (in degrees) of the ellipse that specifies the path of the arc; positive values are clockwise. This will rotate the entire arc relative to the X-axis and is not commonly used.
• is_large_arc - Specifies whether the arc should follow the longer path around an ellipse rather than the shorter one. true to draw the arc greater than 180 degrees; otherwise, false.
• sweep_direction - A value that indicates whether the arc is drawn in the Clockwise or Counterclockwise direction.

Trait Implementations

impl Drop for StreamGeometryContext

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl IGeometryContext for StreamGeometryContext

fn dispose(&mut self)

Finishes the drawing session.

fn set_fill_rule(&mut self, fill_rule: FillRule)

Sets the fill rule.

fn arc_to( &mut self, point: Point, size: Size, rotation_angle: f64, is_large_arc: bool, sweep_direction: SweepDirection, is_stroked: bool, )

Draws an arc to the specified point.

fn begin_figure(&mut self, start_point: Point, is_filled: bool)

Begins a new figure.

fn cubic_bezier_to( &mut self, control_point1: Point, control_point2: Point, end_point: Point, is_stroked: bool, )

Draws a Bezier curve to the specified point.

fn quadratic_bezier_to( &mut self, control_point: Point, end_point: Point, is_stroked: bool, )

Draws a quadratic Bezier curve to the specified point.

fn line_to(&mut self, point: Point, is_stroked: bool)

Draws a line to the specified point.

fn end_figure(&mut self, is_closed: bool)

Ends the figure started by begin_figure.