Package wx :: Package lib :: Package floatcanvas :: Module FloatCanvas :: Class PointSet
[frames | no frames]

Class PointSet

   ColorOnlyMixin --+
                    |
       DrawObject --+
                    |
PointsObjectMixin --+
                    |
                   PointSet


The PointSet class takes a list of 2-tuples, or a NX2 NumPy array of point coordinates.

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 distingish 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.


Method Summary
  __init__(self, Points, Color, Diameter, InForeground)
  DrawD2(self, dc, Points)
  FindClosestPoint(self, XY)
Returns the index of the closest point to the point, XY, given in World coordinates.
  SetDiameter(self, Diameter)
    Inherited from DrawObject
  Bind(self, Event, CallBackFun)
  Hide(self)
  PutInBackground(self)
  PutInForeground(self)
  SetBrush(self, FillColor, FillStyle)
  SetHitBrush(self, HitColor)
  SetHitPen(self, HitColor, LineWidth)
  SetPen(self, LineColor, LineStyle, LineWidth)
  Show(self)
  UnBindAll(self)
    Inherited from PointsObjectMixin
  CalcBoundingBox(self)
  SetPoints(self, Points, copy)
Sets the coordinates of the points of the object to Points (NX2 array).
    Inherited from ColorOnlyMixin
  SetColor(self, Color)
  SetFillColor(self, Color)

Class Variable Summary
    Inherited from DrawObject
dict BrushList = {('MediumGrey', 'Solid'): wxPython wrapper f...
dict FillStyleList = {'CrossHatch': 114, 'FDiagonal_Hatch': 1...
dict LineStyleList = {'Solid': 100, 'ShortDash': 103, 'Dot': ...
dict PenList = {('LightGrey', 'Solid', 1): wxPython wrapper f...

Method Details

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.


Generated by Epydoc 2.1.20050511.rpd on Sat Jun 16 17:01:59 2007 http://epydoc.sf.net