[wxPython] Drawing while dragging

wxPython Users
1

Hi,
  I'm trying to draw a rectangle just like in paintbrush.(I mean dragging it to the coordinates you want).

  OnLeftDown:
      Start drawing the rectangle...
  OnLeftUp:
      Stop drawing the rectangle...
  OnMotion:
      Delete the previous drawn rect(wxXOR)...
      Update the coords and draw it again...

I've tried a lot but couldnt achieve(made one but flickered a lot)
Can you direct me to a source.

Thanks.

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