igraph.drawing.cairo.polygon.CairoPolygonDrawer

class documentation

class CairoPolygonDrawer(AbstractCairoDrawer):

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Class that is used to draw polygons in Cairo.

The corner points of the polygon can be set by the points property of the drawer, or passed at construction time. Most drawing methods in this class also have an extra points argument that can be used to override the set of points in the points property.

Method __init__ Constructs a new polygon drawer that draws on the given Cairo context.
Method draw Draws the polygon using the current stroke of the Cairo context.
Method draw_path Sets up a Cairo path for the outline of a polygon on the given Cairo context.

Inherited from AbstractCairoDrawer:

Method bbox.setter Sets the bounding box of the drawing area where this drawer will draw.
Instance Variable context Undocumented
Property bbox The bounding box of the drawing area where this drawer will draw.
Method _mark_point Marks the given point with a small circle on the canvas. Used primarily for debugging purposes.
Instance Variable _bbox Undocumented
def __init__(self, context, bbox=(1, 1)):
overrides igraph.drawing.cairo.base.AbstractCairoDrawer.__init__

Constructs a new polygon drawer that draws on the given Cairo context.

Parameters
contextthe Cairo context to draw on
bboxignored, leave it at its default value
def draw(self, points):
overrides igraph.drawing.baseclasses.AbstractDrawer.draw

Draws the polygon using the current stroke of the Cairo context.

Parameters
pointsthe coordinates of the corners of the polygon, in clockwise or counter-clockwise order.
def draw_path(self, points, corner_radius=0):

Sets up a Cairo path for the outline of a polygon on the given Cairo context.

Parameters
pointsthe coordinates of the corners of the polygon, in clockwise or counter-clockwise order.
corner_radiusif zero, an ordinary polygon will be drawn. If positive, the corners of the polygon will be rounded with the given radius.