Package igraph :: Module drawing :: Class ShapeDrawer

Class ShapeDrawer

object --+
         |
        ShapeDrawer

Known Subclasses:

Static class, the ancestor of all vertex shape drawer classes.

Custom shapes must implement at least the draw_path method of the class. The method must not stroke or fill, it should just set up the current Cairo path appropriately.

Instance Methods

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Inherited from object: __delattr__, __getattribute__, __hash__, __init__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __str__

Static Methods

[hide private]

draw_path(ctx, cx, cy, w, h=None)
Draws the path of the shape on the given Cairo context, without stroking or filling it.

intersection_point(cx, cy, sx, sy, w, h=None)
Determines where the shape centered at (cx, cy) intersects with a line drawn from (sx, sy) to (cx, cy).

Properties

[hide private]

Inherited from object: __class__

Method Details

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draw_path(ctx, cx, cy, w, h=None)
Static Method

Draws the path of the shape on the given Cairo context, without stroking or filling it.

This method must be overridden in derived classes implementing custom shapes and declared as a static method using staticmethod(...).

Parameters:

ctx - the context to draw on
cx - the X coordinate of the center of the object
cy - the Y coordinate of the center of the object
w - the width of the object
h - the height of the object. If None, equals to the width.

intersection_point(cx, cy, sx, sy, w, h=None)
Static Method

Determines where the shape centered at (cx, cy) intersects with a line drawn from (sx, sy) to (cx, cy).

Can be overridden in derived classes. Must always be defined as a static method using staticmethod(...)

Parameters:

w - the width of the shape
h - the height of the shape. If None, defaults to the width

Returns:

the intersection point (the closest to (sx, sy) if there are more than one) or (cx, cy) if there is no intersection

Class ShapeDrawer

draw_path(ctx, cx, cy, w, h=None) Static Method

intersection_point(cx, cy, sx, sy, w, h=None) Static Method

draw_path(ctx, cx, cy, w, h=None)
Static Method

intersection_point(cx, cy, sx, sy, w, h=None)
Static Method