wx.lib.floatcanvas.FCObjects.PointSet

Draws a set of points

If Points is a sequence of tuples: Points[N][0] is the x-coordinate of point N and Points[N][1] is the y-coordinate.

If Points is a NumPy array: Points[N,0] is the x-coordinate of point N and Points[N,1] is the y-coordinate for arrays.

Each point will be drawn the same color and Diameter. The Diameter is in screen pixels, not world coordinates.

The hit-test code does not distinguish between the points, you will only know that one of the points got hit, not which one. You can use PointSet.FindClosestPoint(WorldPoint) to find out which one

In the case of points, the HitLineWidth is used as diameter.

Class Hierarchy

Inheritance diagram for class PointSet:

Known Superclasses

wx.lib.floatcanvas.FCObjects.ColorOnlyMixin, wx.lib.floatcanvas.FCObjects.DrawObject, wx.lib.floatcanvas.FCObjects.PointsObjectMixin

Methods Summary

__init__	Default class constructor.
DrawD2
FindClosestPoint	Returns the index of the closest point to the point, XY, given
SetDiameter	Sets the diameter

Class API

class PointSet(PointsObjectMixin, ColorOnlyMixin, DrawObject)

Draws a set of points

If Points is a sequence of tuples: Points[N][0] is the x-coordinate of point N and Points[N][1] is the y-coordinate.

If Points is a NumPy array: Points[N,0] is the x-coordinate of point N and Points[N,1] is the y-coordinate for arrays.

Each point will be drawn the same color and Diameter. The Diameter is in screen pixels, not world coordinates.

The hit-test code does not distinguish between the points, you will only know that one of the points got hit, not which one. You can use PointSet.FindClosestPoint(WorldPoint) to find out which one

In the case of points, the HitLineWidth is used as diameter.

Methods

__init__(self, Points, Color="Black", Diameter=1, InForeground=False)

Default class constructor.

Parameters:

• Points – takes a 2-tuple, or a (2,) NumPy array of point coordinates

• Color – see SetColor

• Diameter (integer) – the points diameter

• InForeground (boolean) – should object be in foreground

---

DrawD2(self, dc, Points)

---

FindClosestPoint(self, XY)

Returns the index of the closest point to the point, XY, given in World coordinates. It’s essentially random which you get if there are more than one that are the same.

This can be used to figure out which point got hit in a mouse binding callback, for instance. It’s a lot faster that using a lot of separate points.

Parameters:

XY – the (x,y) coordinates of the point to look for, it takes a 2-tuple or (2,) numpy array in World coordinates

---

SetDiameter(self, Diameter)

Sets the diameter

Parameters:

Diameter (integer) – the points diameter