Version 2.2.2
matplotlib
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matplotlib.patches.ArrowStyle

class matplotlib.patches.ArrowStyle[source]

ArrowStyle is a container class which defines several arrowstyle classes, which is used to create an arrow path along a given path. These are mainly used with FancyArrowPatch.

A arrowstyle object can be either created as:

ArrowStyle.Fancy(head_length=.4, head_width=.4, tail_width=.4)

or:

ArrowStyle("Fancy", head_length=.4, head_width=.4, tail_width=.4)

or:

ArrowStyle("Fancy, head_length=.4, head_width=.4, tail_width=.4")

The following classes are defined

Class Name Attrs
Curve - None
CurveB -> head_length=0.4,head_width=0.2
BracketB -[ widthB=1.0,lengthB=0.2,angleB=None
CurveFilledB -|> head_length=0.4,head_width=0.2
CurveA <- head_length=0.4,head_width=0.2
CurveAB <-> head_length=0.4,head_width=0.2
CurveFilledA <|- head_length=0.4,head_width=0.2
CurveFilledAB <|-|> head_length=0.4,head_width=0.2
BracketA ]- widthA=1.0,lengthA=0.2,angleA=None
BracketAB ]-[ widthA=1.0,lengthA=0.2,angleA=None,widthB=1.0,lengthB=0.2,angleB=None
Fancy fancy head_length=0.4,head_width=0.4,tail_width=0.4
Simple simple head_length=0.5,head_width=0.5,tail_width=0.2
Wedge wedge tail_width=0.3,shrink_factor=0.5
BarAB |-| widthA=1.0,angleA=None,widthB=1.0,angleB=None

An instance of any arrow style class is a callable object, whose call signature is:

__call__(self, path, mutation_size, linewidth, aspect_ratio=1.)

and it returns a tuple of a Path instance and a boolean value. path is a Path instance along which the arrow will be drawn. mutation_size and aspect_ratio have the same meaning as in BoxStyle. linewidth is a line width to be stroked. This is meant to be used to correct the location of the head so that it does not overshoot the destination point, but not all classes support it.

return the instance of the subclass with the given style name.

class BarAB(widthA=1.0, angleA=None, widthB=1.0, angleB=None)[source]

An arrow with a bar(|) at both ends.

Parameters:
widthA : float, optional, default

Width of the bracket

angleA : float, optional, default

Angle between the bracket and the line

widthB : float, optional, default

Width of the bracket

angleB : float, optional, default

Angle between the bracket and the line

class BracketA(widthA=1.0, lengthA=0.2, angleA=None)[source]

An arrow with a bracket(]) at its end.

Parameters:
widthA : float, optional, default

Width of the bracket

lengthA : float, optional, default

Length of the bracket

angleA : float, optional, default

Angle between the bracket and the line

class BracketAB(widthA=1.0, lengthA=0.2, angleA=None, widthB=1.0, lengthB=0.2, angleB=None)[source]

An arrow with a bracket(]) at both ends.

Parameters:
widthA : float, optional, default

Width of the bracket

lengthA : float, optional, default

Length of the bracket

angleA : float, optional, default

Angle between the bracket and the line

widthB : float, optional, default

Width of the bracket

lengthB : float, optional, default

Length of the bracket

angleB : float, optional, default

Angle between the bracket and the line

class BracketB(widthB=1.0, lengthB=0.2, angleB=None)[source]

An arrow with a bracket([) at its end.

Parameters:
widthB : float, optional, default

Width of the bracket

lengthB : float, optional, default

Length of the bracket

angleB : float, optional, default

Angle between the bracket and the line

class Curve[source]

A simple curve without any arrow head.

class CurveA(head_length=0.4, head_width=0.2)[source]

An arrow with a head at its begin point.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

class CurveAB(head_length=0.4, head_width=0.2)[source]

An arrow with heads both at the begin and the end point.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

class CurveB(head_length=0.4, head_width=0.2)[source]

An arrow with a head at its end point.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

class CurveFilledA(head_length=0.4, head_width=0.2)[source]

An arrow with filled triangle head at the begin.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

class CurveFilledAB(head_length=0.4, head_width=0.2)[source]

An arrow with filled triangle heads at both ends.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

class CurveFilledB(head_length=0.4, head_width=0.2)[source]

An arrow with filled triangle head at the end.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

class Fancy(head_length=0.4, head_width=0.4, tail_width=0.4)[source]

A fancy arrow. Only works with a quadratic bezier curve.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

tail_width : float, optional, default

Width of the arrow tail

transmute(path, mutation_size, linewidth)[source]

The transmute method is the very core of the ArrowStyle class and must be overridden in the subclasses. It receives the path object along which the arrow will be drawn, and the mutation_size, with which the arrow head etc. will be scaled. The linewidth may be used to adjust the path so that it does not pass beyond the given points. It returns a tuple of a Path instance and a boolean. The boolean value indicate whether the path can be filled or not. The return value can also be a list of paths and list of booleans of a same length.

class Simple(head_length=0.5, head_width=0.5, tail_width=0.2)[source]

A simple arrow. Only works with a quadratic bezier curve.

Parameters:
head_length : float, optional, default

Length of the arrow head

head_width : float, optional, default

Width of the arrow head

tail_width : float, optional, default

Width of the arrow tail

transmute(path, mutation_size, linewidth)[source]

The transmute method is the very core of the ArrowStyle class and must be overridden in the subclasses. It receives the path object along which the arrow will be drawn, and the mutation_size, with which the arrow head etc. will be scaled. The linewidth may be used to adjust the path so that it does not pass beyond the given points. It returns a tuple of a Path instance and a boolean. The boolean value indicate whether the path can be filled or not. The return value can also be a list of paths and list of booleans of a same length.

class Wedge(tail_width=0.3, shrink_factor=0.5)[source]

Wedge(?) shape. Only works with a quadratic bezier curve. The begin point has a width of the tail_width and the end point has a width of 0. At the middle, the width is shrink_factor*tail_width.

Parameters:
tail_width : float, optional, default

Width of the tail

shrink_factor : float, optional, default

Fraction of the arrow width at the middle point

transmute(path, mutation_size, linewidth)[source]

The transmute method is the very core of the ArrowStyle class and must be overridden in the subclasses. It receives the path object along which the arrow will be drawn, and the mutation_size, with which the arrow head etc. will be scaled. The linewidth may be used to adjust the path so that it does not pass beyond the given points. It returns a tuple of a Path instance and a boolean. The boolean value indicate whether the path can be filled or not. The return value can also be a list of paths and list of booleans of a same length.