wx.Rect - wxPyWiki

Some remarks on wx.Rect class

Where is additional constructor-like global functions which can be used for creating wx.Rect: wx.RectPS - create rectangle from (point,size)pair. wx.RectPP - create rectangle from (point,point) pair.

Actually wx.RectPP accepts points in _any_ order, not only (left_top,right-down) as you can imagine from it's documentation. wxRectPP returns rectangle which lays _around_ both points, say:

wx.RectPP( (0,0),(1,1) ) == wx.Rect( 0,0,2,2 )

Where is also a function wx.IntersectRect( r1,r2 ) which returns intersection of two rectangles or None if they don't intersects.

Here is small unittest example:

   1 import unittest
   2 import wx
   3 
   4 class TestRectPP( unittest.TestCase ):
   5     def test_rect_surrounds_both_points( self ):
   6         self.assertEqual( wx.RectPP((0,0),(7,5)), wx.Rect(0,0,8,6) )
   7     
   8     def test_points_order_is_irrelevant( self ):
   9         p1 = wx.Point( 1,2 )
  10         p2 = wx.Point( 5,6 )
  11         r1 = wx.RectPP( p1, p2 )
  12         r2 = wx.RectPP( p2, p1 )
  13         self.assertEqual( r1, r2 )
  14     
  15 class TestIntersection( unittest.TestCase ):
  16     def test_equals( self ):
  17         r1 = wx.RectPS( (0,0),(4,4) )
  18         r2 = wx.RectPS( (0,0),(4,4) )
  19         r3 = wx.IntersectRect( r1,r2 )
  20         self.assertEqual( r3, wx.RectPS((0,0),(4,4)) )
  21     
  22     def test_some_intersection( self ):
  23         r1 = wx.RectPS( (0,0),(4,4) )
  24         r2 = wx.RectPS( (1,2),(4,4) )
  25         r3 = wx.IntersectRect( r1,r2 )
  26         self.assertEqual( r3, wx.Rect(1,2,3,2) )
  27     
  28     def test_no_intersection_returns_None( self ):
  29         r1 = wx.RectPP( (0,0),(10,10) )
  30         r2 = wx.RectPP( (12,12),(20,20) )
  31         r3 = wx.IntersectRect( r1,r2 )
  32         self.assertEqual( r3, None )
  33     
  34 def suite():
  35     suite = unittest.TestSuite()
  36     suite.addTest( unittest.makeSuite( TestRectPP ) )
  37     suite.addTest( unittest.makeSuite( TestIntersection ) )
  38     return  suite
  39 
  40 if  __name__ == '__main__':
  41     runner = unittest.TextTestRunner()
  42     runner.run( suite() )

(feel free to edit my "english") Vladimir Ignatov